LIGO/Virgo S190412m

The LIGO Scientific Collaboration and the Virgo Collaboration report:

We identified the compact binary merger candidate S190412m during
real-time processing of data from LIGO Hanford Observatory (H1), LIGO
Livingston Observatory (L1), and Virgo Observatory (V1) at 2019-04-12
05:30:44.166 UTC (GPS time: 1239082262.166). The candidate was found by
the GstLAL [1], SPIIR [2], CWB [3], MBTAOnline [4], and PyCBC Live [5]
analysis pipelines.

S190412m is a candidate of interest because its false alarm rate, as
determined by the online analysis, is estimated to be 1.7e-27 Hz. The
candidate's properties can be found at this URL:

https://gracedb.ligo.org/superevents/S190412m

The initial classification of the signal, in order of descending
probability, is BBH (>99%), Terrestrial (<1%), BNS (<1%), NSBH (<1%), or
MassGap (<1%).

Assuming the candidate is astrophysical in origin, there is strong
evidence against the lighter compact object having a mass < 3 solar masses
(HasNS: <1%). The current estimate of the probability of nonzero remnant
mass outside the final BH horizon (HasRemnant) reported in the GCN Notice
is not reliable.

One skymap is available at this time and can be retrieved from the GraceDB
candidate page:
 * bayestar.fits.gz, a preliminary localization generated by BAYESTAR [6],
   distributed via GCN notice about an hour after the time of the
   candidate (delayed by a technical issue).

For the bayestar.fits.gz skymap, the 90% credible region is 156 deg2.
Marginalized over the whole sky, the luminosity distance estimate is
812 +/- 194 Mpc (a posteriori mean +/- standard deviation).

For further information about analysis methodology and the contents of
this alert, refer to the LIGO/Virgo Public Alerts User Guide
<https://emfollow.docs.ligo.org/userguide/>.

 [1] Messick et al. PRD 95, 042001 (2017)
 [2] Qi Chu, PhD Thesis, University of Western Australia (2017)
 [3] Klimenko et al. PRD 93, 042004 (2016)
 [4] Adams et al. CQG 33, 175012 (2016)
 [5] Nitz et al. PRD 98, 024050 (2018)
 [6] Singer & Price PRD 93, 024013 (2016)

V. Lipunov, T.Pogrosheva, E. Gorbovskoy, N.Tyurina, V.Kornilov, D.Vlasenko, V.Vladimirov, D.Zimnukhov,
A.Kuznetsov, P.Balanutsa, I.Gorbunov, A. Chasovnikov,  V.Grinshpun, F.Balakin 
(Lomonosov Moscow State University, SAI, Physics Department),

R. Podesta, C. Lopez, C.Francile, F. Podesta (Observatorio Astronomico  Felix 
Aguilar OAFA, San Juan National University),

H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio 
ICATE,SJNU)

R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres (The Instituto 
de Astrofisica de Canarias),

D. Buckley (South African Astronomical Observatory),

O. Gress, N.M. Budnev, O.Ershova (Applied Physics Institute, Irkutsk State 
University),

V. Yurkov, A. Gabovich, Yu. Sergienko, D. Kobcev (Blagoveschensk EducationState 
University),

A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov (Kislovodsk Solar  Station 
of the Pulkovo Observatory),

MASTER Global Robotic Net (http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy,vol. 2010, 30L)
automatically started LIGO/Virgo S190412m alert observations (Sjawhan et al. GCN 24098
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 )

MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan 
National University) was pointed to the  LIGO/Virgo S190412m alert
  20 sec after notice time and 3839 sec after trigger time at 2019-04-12 06:34:43 UT.
The 5-sigma upper limit has been about  18.16mag on the first image.


  Reduction and observation will be continued.

The message may be cited.

I. Martinez-Castellanos (University of Maryland) reports on behalf of the
HAWC Collaboration:

The HAWC Collaboration performed a follow-up of the gravitational wave
triggerS190412m (GCN #24098
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 ). At the time of the trigger the HAWC local
zenith was oriented towards (RA, Dec) = (185.3deg, 19.1deg). 99% of the GW
candidate sky location probability fell within our observable field of view
(0-45 deg zenith angle).

We performed a search for a short timescale emission using 6 sliding time
windows (dt = 0.3s, 1s, 3s, 10s, 30s and  100s), shifted forward in time by
20% of their width. We searched the 95% probability containment area in a
timescale-dependent time period, from t0-5dt to t0+10dt, where t0 is the
time of the GW trigger. No significant gamma-ray detection above the
background was observed.

The sensitivity of this analysis is greatly dependent on zenith angle,
ranging from 4.5deg to 43.6deg for the area searched in this analysis. The
5sigma detection sensitivity to a 1s (100s) burst in the 80-800GeV energy
ranges from 1.2e-06 erg/cm^2 to 7.8e-05 erg/cm^2  (6.7e-06 erg/cm^2
to 3.5e-04 erg/cm^2), depending on the zenith angle.

HAWC is a TeV gamma ray water Cherenkov array located in the state of
Puebla, Mexico. It is sensitive to the energy range ~0.1-100TeV, and
monitors 2/3 of the sky every day with an instantaneous field-of-view of ~2
sr.

M. J. B. Rosell, Matthew Shetrone, J. Craig Wheeler, Karl Gebhardt,
and Aaron Zimmerman, on behalf of the LIGO Hobby-Eberly Telescope
Response (LIGHETR) team report the spectroscopic observation of the
field of S190412m (GCN #24098
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 ) with the VIRUS IFU instrument on
the HET. We sampled a prioritized list of 7 galaxies from the GLADE
catalog that overlapped with the LIGO probability map and the observable
pupil of the HET. The resulting data cube covers the wavelength 350 to
550 nm at a resolving power of 750. The effective limiting magnitude in
the B band was 22 magnitudes. Each field is 50x50 arc seconds. We observed,
in order, galaxies
213.485626+32.349361, 214.212296+31.609276,
214.199814+32.783714, 214.708557+32.501812,
214.905014+33.619785, 215.054092+33.497181
and 218.171326+34.651875 that were numbers 2, 3, 5, 4, 6, 1,
and 13, respectively, on our a priori mass-weighted galaxy list.
Report of the results will be submitted later.

--
J. Craig Wheeler
Samuel T. and Fern Yanagisawa Regents Professor of Astronomy
University and University of Texas System Distinguished Teaching Professor
President, American Astronomical Society, 2006-2008
Department of Astronomy
2515 Speedway, Stop C1400
Austin, TX 78712-1205
512-471-6407
http://www.as.utexas.edu/~wheel

Supernova Explosions http://www.springer.com/us/book/9783662550526
Cosmic Catastrophes http://ebooks.cambridge.org/ebook.jsf?bid=CBO9780511536625
The Krone Experiment, Krone Ascending http://www.amazon.com/Krone-Ascending-ebook/dp/B00926QEGW

M. Ageron (CPPM/CNRS), B. Baret (APC/CNRS), A. Coleiro (APC/Universite Paris Diderot), M. Colomer (APC/Universite Paris Diderot)), D. Dornic (CPPM/CNRS), A. Kouchner (APC/Universite Paris Diderot), T. Pradier (IPHC/Universite de Strasbourg) report on behalf of the ANTARES  Collaboration:

Using on-line data from the ANTARES detector, we have performed a follow-up analysis of the recently reported LIGO/Virgo G329483/S190412m event using the 90% contour of the probability map provided by the GW interferometers at event time. The ANTARES visibility at the time of the alert, together with the 50% and 90% contours of the probability map are shown in https://www.cppm.in2p3.fr/~dornic/events_runo3/S190412m.png. Considering the location probability provided by the LIGO/Virgo collaborations, there is a 9.3% chance that the GW emitter was in the ANTARES **upgoing** field of view at the time of the alert. 

No up-going muon neutrino candidate events were recorded in the ANTARES sky during a +/- 500s time-window centered on the time and in the 90% contour of the G329483/S190412m event. The expected number of atmospheric background events in the region visible by ANTARES is 1.8e-5 in the +/- 500s time window. An extended search during +/- 1 hour gives no up-going muon neutrino coincidence. The expected number of atmospheric background events in the region visible by ANTARES is 2.3e-4 in this larger time window.

ANTARES is the largest undersea neutrino detector, installed in the Mediterranean Sea, and it is primarily sensitive to neutrinos in the TeV-PeV  energy range. At 10 TeV, the median angular resolution for muon neutrinos is about 0.5 degrees. In the range 1-100 TeV ANTARES has a competitive sensitivity to this position in the sky.

Q. Luo, C. Cai, C. K. Li, X. B. Li, G. Li, J. Y. Liao, S. L. Xiong, 
C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, A. M. Zhang, 
Y. F. Zhang, X. F. Lu, C. L. Zou (IHEP), Y. J. Jin, 
Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song, 
M. Wu, Y. P. Xu, S. N. Zhang (IHEP), 
report on behalf of the Insight-HXMT team: 

Insight-HXMT was taking data normally around the GW trigger time
(T0=2019-04-12 05:30:44 UTC). At T0, about 30% of the LIGO
localization region was covered by the Insight-HXMT without occultation
by the Earth.

Within T0 �� 100 s, no significant excess events (SNR > 5 sigma) are 
found in a search of the Insight-HXMT/HE raw light curves.

Assuming the GW counterpart GRB with three typical GRB Band spectral 
models, two typical duration timescales(1 s, 10 s) from the peak 
position of the LIGO-Virgo location probability map, the 5-sigma 
upper-limits fluence (0.2 - 5 MeV, incident energy) are reported below:

Band model 1 (alpha=-1.9, beta=-3.7, Ep=70 keV):
1s:   5.6e-07 erg cm^-2
10s:  2.8e-06 erg cm^-2

Band model 2 (alpha=-1.0, beta=-2.3, Ep=230 keV):
1s:   7.8e-07 erg cm^-2
10s:  3.7e-06 erg cm^-2

Band model 3 (alpha=-0.0, beta=-1.5, Ep=1000 keV):
1s:   1.1e-06 erg cm^-2
10s:  4.6e-06 erg cm^-2

All measurements above are made with the CsI detectors operating in the
regular mode with the energy range of about 80-800 keV (record energy).
Only gamma-rays with energy greater than about 200 keV can penetrate
the spacecraft and leave signals in the CsI detectors installed inside
of the telescope.

Insight-HXMT is the first Chinese space X-ray telescope, which was 
fundedjointly by the China National Space Administration (CNSA) and 
the Chinese Academy of Sciences (CAS). 
More information could be found at: http://www.hxmt.org.

S. Sugita (AGU), H. Negoro (Nihon U.), M. Serino (AGU),  M. Sugizaki,
N. Kawai (Tokyo Tech),
M. Nakajima, W. Maruyama, M. Aoki, K. Kobayashi (Nihon U.),
S. Nakahira, T. Mihara, M. Matsuoka (RIKEN), T. Sakamoto, A. Yoshida (AGU),
Y. Tsuboi, W. Iwakiri, R. Sasaki, H. Kawai, T. Sato (Chuo U.), M.
Shidatsu (Ehime U.),
Y. Tachibana, K. Morita, M. Oeda, K. Shiraishi (Tokyo Tech),
S. Ueno, H. Tomida, M. Ishikawa, Y. Sugawara, N.Isobe, R. Shimomukai,
M. Tominaga (JAXA), Y. Ueda, A. Tanimoto, T. Morita, S. Yamada, S.
Ogawa (Kyoto U.),
H. Tsunemi, T. Yoneyama, K. Asakura, S. Ide (Osaka U.),
M. Yamauchi, S. Iwahori, Y. Kurihara (Miyazaki U.), T. Kawamuro (NAOJ),
K. Yamaoka (Nagoya U.), Y. Kawakubo (LSU)
report on behalf of the MAXI team:

We examined the MAXI/GSC all-sky X-ray images (2-20 keV) obtained
in the orbit after the LVC trigger
S190412m at 2019-04-12 05:31:03 UTC (GCN 24098
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 ).

At the trigger time of S190412m, the high-voltage of MAXI/GSC was off,
and it was turned on at T0+175 sec.
The one-orbit (92 min) scan of GSC covered 93.2% of the 90% error region
of the bayestar skymap from 06:30:50 to 06:39:52 UTC (T0+3587 to 4129 sec).
The scan was mainly performed by the degraded GSC_3 camera.
No significant new source was found in the error region at the one-orbit scan.
The 1-sigma averaged upper limit obtained
from the scan was 66 mCrab at 2-20 keV.

If you require information of X-ray flux by MAXI/GSC at specific coordinates,
please contact the submitter of this circular by email.

A. Goldstein (USRA) reports on behalf of the Fermi-GBM Team and the
GBM-LIGO/Virgo group

For S190412m, and using the initial BAYESTAR skymap, Fermi-GBM was
observing 99.8% of the localization probability region at event time.

There was no Fermi-GBM onboard trigger around the event time of the
LIGO/Virgo detection of a GW trigger (GCN 24098
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 ). An automated, blind
search for short gamma-ray bursts below the onboard triggering threshold in
Fermi-GBM also identified no counterpart candidates. The GBM targeted
search, the most sensitive, coherent search for GRB-like signals, was run
from +/-30 s around merger time, and also identified no counterpart
candidates.

We therefore set upper limits on impulsive gamma-ray emission considering
the 90% credible region of the GW localization. Using the representative
soft, normal, and hard GRB-like spectral templates described in
arXiv:1612.02395
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 , we set the following 3 sigma flux upper limits over
10-1000 keV (in units of 10^-7 erg/s/cm^2):

Timescale  Soft     Normal   Hard
------------------------------------
0.1 s:     4.7-5.7  9.1-10   25-27
1.0 s:     1.5-1.8  2.8-3.2  7.4-7.9
10  s:     0.5-0.6  0.9-1.0  2.3-2.4

Assuming the mean luminosity distance of 812 Mpc from the GW detection, we
estimate intrinsic luminosity upper limits of (0.6-6.9)E49 erg/s for the
soft template, (1.0-11)E49 erg/s for the normal template, and (4.2-50)E49
erg/s for the hard template over the 1 keV-10 MeV energy range.

Tanaka, M. (Tohoku U.), Niino, Y., Morokuma, T. (U. of Tokyo), 
Tominaga N. (Konan U.), Utsumi, Y. (Stanford U./SLAC), 
Yanagisawa, K. (NAOJ), Murata, K. L. (Tokyo Tech), 
Onozato, H. (Nishi-Harima Astronomical observatory), 
Akitaya, H. (Hiroshima U.), Itoh, R. (Bisei Astronomical observatory), 
Sekiguchi, Y. (Toho U.), Oasa, Y. (Saitama U.), 
on behalf of J-GEM collaboration

We report our optical and near-infrared imaging observations 
for the gravitational wave event S190412m. 
We started our observations about 4.5 hours after receiving the alert.

We performed 390 deg2 wide-field imaging survey,
covering 88.5 % of probability region,
using the Tomo-e Gozen camera on the 105-cm Kiso Schmidt telescope,
a very wide-field (20 deg2 field-of-view) optical CMOS imager
(Sako et al. 2018, SPIE, 10702, 107020J). 
A typical limiting magnitude is about 18.5 mag (no filter). 
Data reduction is in progress. 

We also performed galaxy-targeted observations for 63 galaxies 
(see the table below) selected from the GLADE catalog 
(Dalya et al. 2016) in the probability skymap of S190412m 
using the following telescopes/instruments.
 - 50 cm MITSuME telescope at Akeno Observatory and a 3 color imager (g, Rc, Ic)
 - 50 cm MITSuME telescope at Okayama Astrophysical Observatory and a 3 color imager (g, Rc, Ic)
 - 91 cm Okayama Astrophysical Observatory NIR Wide���Field Camera 
   (OAOWFC, J-band, Yanagisawa, K., et al. 2014, Proc. SPIE, 9147, 91476D, 
   Yanagisawa, K., et al. 2016, Proc. SPIE, 9908, 99085D)
 - 200 cm Nayuta telescope at Nishi-Harima Astronomical Observatory 
   and Nishiharima Infrared Camera (NIC)
We found no apparent transient objects in these galaxies 
to the 5 sigma limiting magnitudes listed below.
 
     galid         ra      dec   No fil   G     R     I     J          obsid        
--------------- -------- ------- ------ ----- ----- ----- ----- --------------------
GL141846+305225 214.6935 30.8735  99.00  ----  ----  ---- 18.03  Kiso Schmidt,OAOWFC
GL124935+150900  192.396   15.15   ---- 18.89 19.14 18.60  ----        MITSuME-Akeno
GL144207+352623  220.531 35.4396   ----  ----  ----  ---- 19.40               Nayuta
GL142013+332950 215.0541 33.4972   ---- 20.04 20.16 18.93 18.76 MITSuME-Akeno,OAOWFC
GL121809-005110 184.5373 -0.8527   ----  ----  ----  ---- 17.91               Nayuta
GL144212+335859 220.5516  33.983   ---- 19.36 20.14  ----  ----        MITSuME-Akeno
GL141357+322058 213.4856 32.3494   ----  ---- 19.69 19.08  ----        MITSuME-Akeno
GL145541+331353 223.9212 33.2313   ---- 20.11 20.25 19.61  ----        MITSuME-Akeno
GL141937+333711  214.905 33.6198   ---- 20.04 20.16 19.41 18.76 MITSuME-Akeno,OAOWFC
GL141348+323200  213.452 32.5335   ---- 20.02 20.29 19.53  ----        MITSuME-Akeno
GL141648+324701 214.1998 32.7837   ---- 20.10 20.17 18.24  ----        MITSuME-Akeno
GL145605+335817 224.0188 33.9714   ---- 20.39 20.12 19.00  ----        MITSuME-Akeno
GL142010+320453  215.042 32.0813  99.00  ----  ----  ---- 18.46  Kiso Schmidt,OAOWFC
GL141930+320951 214.8739 32.1641   ----  ----  ----  ---- 18.46               OAOWFC
GL141400+322606  213.501  32.435   ---- 20.02 20.29 19.53  ----        MITSuME-Akeno
GL144850+333747 222.2104 33.6296  18.57  ----  ----  ---- 18.39  Kiso Schmidt,Nayuta
GL141935+315805  214.894 31.9682   ----  ----  ----  ---- 18.46               OAOWFC
GL143933+342329 219.8879 34.3913  18.96  ----  ----  ----  ----         Kiso Schmidt
GL144328+342849 220.8685 34.4804  18.75  ----  ----  ----  ----         Kiso Schmidt
GL145608+330400 224.0347 33.0664   ---- 20.11  ----  ----  ----        MITSuME-Akeno
GL145317+344500 223.3209 34.7498   ----  ----  ----  ---- 18.91               OAOWFC
GL144338+341310 220.9077 34.2193  18.11  ----  ----  ----  ----         Kiso Schmidt
GL145140+344338 222.9153 34.7271   ----  ----  ----  ---- 18.91               OAOWFC
GL143724+341721 219.3511 34.2891  18.74  ----  ----  ----  ----         Kiso Schmidt
GL145243+343036 223.1807 34.5101   ----  ----  ----  ---- 18.91               OAOWFC
GL144726+333258 221.8566 33.5496  18.70  ----  ----  ----  ----         Kiso Schmidt
GL145602+330229  224.008 33.0414   ---- 20.11  ----  ----  ----        MITSuME-Akeno
GL141425+323945 213.6044 32.6625   ---- 20.02 20.29 19.53  ----        MITSuME-Akeno
GL142016+333321  215.066  33.556   ---- 20.04 20.16 19.41 18.76 MITSuME-Akeno,OAOWFC
GL143657+333905 219.2358 33.6513  18.99  ----  ----  ----  ----         Kiso Schmidt
GL141445+312118 213.6871 31.3549  99.00  ----  ----  ----  ----         Kiso Schmidt
GL141958+321041 214.9927 32.1781   ----  ----  ----  ---- 18.46               OAOWFC
GL141042+314031  212.675 31.6753  99.00  ----  ----  ----  ----         Kiso Schmidt
GL143722+343456 219.3409 34.5822  18.79  ----  ----  ----  ----         Kiso Schmidt
GL145254+341026 223.2263  34.174  18.33  ----  ----  ----  ----         Kiso Schmidt
GL145544+335031 223.9321 33.8419   ---- 20.39 20.12 19.00  ----        MITSuME-Akeno
GL141930+320800 214.8758 32.1333   ----  ----  ----  ---- 18.46               OAOWFC
GL141442+310132  213.673 31.0255  99.00  ----  ----  ----  ----         Kiso Schmidt
GL141937+320803 214.9041 32.1342   ----  ----  ----  ---- 18.46               OAOWFC
GL141317+321752  213.321 32.2979   ----  ---- 19.69 19.08  ----        MITSuME-Akeno
GL144311+340241 220.7952 34.0448   ---- 19.36 20.14  ----  ----        MITSuME-Akeno
GL144233+341714 220.6376 34.2873  19.04  ----  ----  ----  ----         Kiso Schmidt
GL143710+333313 219.2925 33.5536  18.85  ----  ----  ----  ----         Kiso Schmidt
GL145332+343927  223.382 34.6575   ----  ----  ----  ---- 18.91               OAOWFC
GL145319+345357 223.3282 34.8992  17.91  ----  ----  ----  ----         Kiso Schmidt
GL145554+330548 223.9732 33.0966   ---- 20.11  ----  ----  ----        MITSuME-Akeno
GL145223+350140 223.0957 35.0277  18.62  ----  ----  ----  ----         Kiso Schmidt
GL145242+350514 223.1733 35.0873  18.62  ----  ----  ----  ----         Kiso Schmidt
GL143717+341608 219.3228 34.2688  18.74  ----  ----  ----  ----         Kiso Schmidt
GL144156+340041 220.4842 34.0114   ---- 19.36 20.14  ----  ----        MITSuME-Akeno
GL144854+333728 222.2247 33.6244  18.57  ----  ----  ---- 18.39  Kiso Schmidt,Nayuta
GL141358+310446 213.4921 31.0794  99.00  ----  ----  ----  ----         Kiso Schmidt
GL142314+325444 215.8095 32.9122  99.00  ----  ----  ----  ----         Kiso Schmidt
GL145347+323627 223.4462 32.6076  18.19  ----  ----  ----  ----         Kiso Schmidt
GL144456+333012 221.2344 33.5034  18.75  ----  ----  ----  ----         Kiso Schmidt
GL141303+311435 213.2638  31.243  99.00  ----  ----  ----  ----         Kiso Schmidt
GL145405+341331 223.5214 34.2252  18.08  ----  ----  ----  ----         Kiso Schmidt
GL145516+333604  223.816 33.6011  18.35  ----  ----  ----  ----         Kiso Schmidt
GL141318+311401  213.327 31.2335  99.00  ----  ----  ----  ----         Kiso Schmidt
GL144932+332353 222.3853 33.3981  18.70  ----  ----  ----  ----         Kiso Schmidt
GL144526+352547 221.3572 35.4297  99.00  ----  ----  ----  ----         Kiso Schmidt
GL144243+334919 220.6794 33.8221   ---- 19.36  ----  ----  ----        MITSuME-Akeno
GL141827+310941  214.611 31.1615   ----  ----  ----  ---- 18.03               OAOWFC

Note that a limiting mag = 99.00 for Kiso Schmidt is due to failure 
in our real-time data analysis (typical depth is about 18.5 mag).

These observations were done in the framework of J-GEM collaboration
(Morokuma et al. 2016, PASJ, 68, L9).

A. Y. Lien (GSFC/UMBC), S. D. Barthelmy (NASA/GSFC), D. M. Palmer (LANL),
T. Sakamoto (AGU), A. A. Breeveld (MSSL-UCL), A. P. Beardmore (U.
Leicester),
D. N. Burrows (PSU), S. Campana (INAF-OAB), S. B. Cenko (NASA/GSFC),
G. Cusumano (INAF-IASF PA), A. D'Ai (INAF-IASFPA), P. D'Avanzo (INAF-OAB),
V. D'Elia(ASDC), S. Emery (UCL-MSSL), P. A. Evans (U. Leicester),
P. Giommi (ASI), C. Gronwall (PSU), D. Hartmann (Clemson U.),
J. A. Kennea (PSU), H. A. Krimm (NSF), N. P. M. Kuin (UCL-MSSL),

F. E. Marshall (NASA/GSFC), A. Melandri (INAF-OAB),
B. Mingo (U. Leicester), J. A. Nousek (PSU), S. R. Oates (Uni. of Warwick),
P. T. O'Brien (U. Leicester), J. P. Osborne (U. Leicester),
C. Pagani (U. Leicester), K. L. Page (U.Leicester), M. Perri (ASDC),
J. L. Racusin (NASA/GSFC), B. Sbarufatti (INAF-OAB/PSU),
M. H. Siegel (PSU), G. Tagliaferri (INAF-OAB), A. Tohuvavohu (PSU),
E. Troja (NASA/GSFC/UMCP) report on behalf of the Swift team:

We report the search results in the BAT data within T0 +/- 100 s of the
LVC event S190412m (LIGO/VIRGO Collaboration GCN Circ. 24098
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 ),
where T0 is the LVC trigger time (2019-04-12T05:30:44 UTC).

The center of the BAT FOV at T0 is
RA = 295.081 deg,
DEC = -30.264 deg,
ROLL = 84.881 deg.
The BAT Field of View (>10% partial coding) covers 0.28% of the integrated
LVC localization probability.

Within T0 +/- 100 s, no significant detections (signal-to-noise ratio >~ 5
sigma)
are found in the BAT raw light curves with time bins of 64 ms, 1 s, and 1.6
s,
respectively. Assuming an on-axis (100% coded) short GRB with a typical
spectrum
in the BAT energy range (i.e., a simple power-law model with a power-law
index of -1.32,
Lien & Sakamoto et al. 2016), the 5-sigma upper limit in the 1-s binned
light
curve corresponds to a flux upper limit (15-350 keV) of ~ 7.25 x 10^-8
erg/s/cm^2.

BAT retains decreased, but significant, sensitivity to rate increases for
gamma-ray events outside of its FOV. About 99.71% of the integrated LVC
localization probability was outside of the BAT FOV but above the Earth's
limb
from Swift's location, and the corresponding flux upper limits for this
region
are within roughly an order of magnitude of those within the FOV.

E. Bissaldi (INFN & Politecnico Bari), M. Axelsson (KTH & Stockholm Univ.)
and N. Omodei (Stanford Univ.) report on behalf of the Fermi-LAT Collaboration:


We have searched data collected by the Fermi Large Area Telescope (LAT) on
April 12, 2019, for possible high-energy (E>100 MeV) gamma-ray emission in
spatial/temporal coincidence with the LIGO/Virgo trigger S190412m.

We define "instantaneous coverage" as the integral over the region of the LIGO
probability map that is within the LAT field of view at a given a time, and "cumulative
coverage" as the integral of the instantaneous coverage over time. Fermi-LAT had
instantaneous coverage of ~99% of the LIGO probability at the time of the trigger
(T0 = 2019-04-12 05:30:44 UTC), and reached 100% cumulative coverage
after ~7 ks.

We performed a search for a transient counterpart within the 90% contour of
the LIGO map in a fixed time window from T0 to T0+10 ks. No significant new
sources are found. We also performed a search which adapted the time interval of
the analysis to the exposure of each region of the sky. Again, no significant candidate
counterpart was found.

Energy flux upper bounds for the fixed time interval between 100 MeV and 100 GeV
for this search vary between 2e-10 and 3e-09 [erg/cm^2/s].

The Fermi-LAT point of contact for this event is
Elisabetta Bissaldi (Elisabetta.Bissaldi@ba.infn.it).


The Fermi-LAT is a pair conversion telescope designed to cover
the energy band from 20 MeV to greater than 300 GeV
It is the product of an international collaboration between
NASA and DOE in the U.S. and many scientific institutions
across France, Italy, Japan and Sweden.

D.Steeghs(1), Lyman, J. (1), M.Dyer(3), D.Galloway(2), V.Dhillon(3),
P.O'Brien(4), G.Ramsay(5), D.Pollacco(1), E.Thrane(2), S.Poshyachinda(6),
E.Pall��(7), K.Ulaczyk(1), R.Cutter(1), A.Levan(1), T. Marsh(1),
R.West(1), K.Wiersema(1), B.Gompertz(1), E.Stanway(1), K.Ackley(2),
Y-L.Mong(2), A.Casey(2), M.Brown(2), E.Rol(2), J.Mullaney(3),
S.Littlefair(3), L.Makrygianni(3), E.Daw(3), J.Maund(3), R.Starling(4),
R.Eyles(4), U.Sawangwit(6), D.Mkrtichian(6), S.Awiphan(6),
S.Aukkaravittayapun(6), P.Irawati(6), M.Kennedy(8), R.Breton(8)
(1) Warwick University; (2) Monash University; (3) Univ. of Sheffield;
(4) University of Leicester; (5) Armagh Observatory;
(6) National Astronomical Research Institute of Thailand;
(7) Instituto de Astrofisica de Canarias); (8) University of Manchester

report on behalf of the GOTO collaboration:

We report on optical observations with the Gravitational-wave Optical
Transient Observer in response to S190412m (GCN #24098
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 ).  Targeted
observations across 18 pointings containing 94% of the source
location probability (based on the initial BAYESTAR skymap) were
performed  between 20:28 UT and 22:48 UT Apr 12 2019.

No new transients were detected that could be credibly associated with
S190412m, in line with searches reported in Lipunov et al. (GCN #24099
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 )
and Weiland et al. (GCN #24107
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 ).

Each pointing spans 4.9x3.7 square degrees and consisted of 3x60s
exposures in ourL-band filter (400-700nm passband) with a  typical
5-sigma photometric depth equivalent to g=19.4, based on a photometric
calibration against PS1 sources. All pointings were observed twice.

Images are processed immediately after acquisition using the GOTOphoto
pipeline. Difference imaging was performed on the median of each
triplet of exposures using recent survey observations of the same
pointings. Source candidates were initially filtered using a classifier and
cross-matched against a variety of catalogs, including the MPC and PS1.
Human candidate vetting was performed during data acquisition and
processing in case of notable detections.

GOTO is operated at the La Palma observing facilities of the
University of Warwick on behalf of a consortium including the
University of Warwick, Monash University, Armagh Observatory, the
University of Leicester, the University of Sheffield, the National
Astronomical Research Institute of Thailand (NARIT) and the Instituto
de Astrofisica de Canarias (IAC) (https://goto-observatory.org/)

K. De (Caltech), S. M. Adams (Caltech), I. Andreoni (Caltech), S. Anand (Caltech), M. Hankins (Caltech), L. Singer (NASA GSFC), M. Coughlin (Caltech), T. Ahumada (UMD), M. M. Kasliwal (Caltech), A. Moore (ANU), J. Soon (ANU), M. Ashley (UNSW), T. Travouillon (ANU) report on behalf of the Palomar Gattini-IR team and the larger GROWTH (Global Relay of Observatories Watching Transients Happen) collaboration

We report wide-field near-infrared follow-up observations of the localization region of the BBH gravitational wave event S190412m (GCN 24098
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 ) by the Palomar Gattini-IR survey (Moore and Kasliwal 2019). Gattini-IR is a newly commissioned near-IR camera with a field of view of 25 square degrees mounted on a robotic 30 cm telescope at Palomar observatory.

Starting 15 min after the BBH merger notice, we mapped the localization in J-band. We imaged a total of 430 sq. deg. for four epochs between 2019-04-12 06:45 UT and 2019-04-12 10:45 UT, spread over 18 field tiles in the localization region. The tiling was optimally determined and triggered using the GROWTH Target of Opportunity marshal (Coughlin et al. 2019a, Kasliwal et al. 2019b). The observations cover a total of 95 % of the probability region. Each of 4 epochs consisted of a sequence of 8 dithers of 8 second exposures each on the field, which were processed and stacked with the Palomar Gattini-IR data reduction pipeline. No viable counterparts were identified. The typical limiting magnitude of each stacked epoch (64 second exposure time) was between 15.5 - 16 AB mag in J-band.

M. Boer, N. Christensen, L. Eymar (CNRS-UCA-OCA ARTEMIS), A. Klotz,
K. Noysena (CNRS-UPS IRAP), S. Antier (CNRS-CEA-UP7 APC), S. Basa
(CNRS-LAM), D. Corre (CNRS-UPSud LAL), M. Coughlin (Caltech),
D. Coward (OzGrav-UWA),�� J.-G. Ducoin (CNRS-UPSud LAL),
B. Gendre (OzGrav-UWA), P. Hello (CNRS-UPSud LAL),
C. Lachaud (CNRS-CEA-UP7 APC), N. Leroy (CNRS-UPSud LAL), D. Turpin (NAOC)
report on behalf of the TAROT and GRANDMA collaborations.

We performed tiled observations of LIGO-Virgo S190412m (GCNC #24098) event
with the TCA (Calern Observatory, OCA, France) and TRE (Les Makes
Observatory, La R��union Island, France) telescopes in Clear filter.
The observations started at 2019-04-12 15:39:00 UTC, about 10h after the GW
trigger time.

We performed the following tiled observations :

For TRE
+-------------------+---------------------+--------+-------+-------+
Tstart�������������������������� | Tend������������������������������ | RA�������� | DEC���� | Proba |
[UTC time]������������������ | [UTC time]������������������ | [deg]�� | [deg] | [%] |
+-------------------+---------------------+--------+-------+-------|
2019-04-12 18:39:12 | 2019-04-12 22:48:35 | 216.00 | 34.29 | 20.97 |
2019-04-12 18:48:00 | 2019-04-12 22:57:29 | 221.14 | 34.29 | 14.50 |
2019-04-12 19:51:03 | 2019-04-12 23:06:35 | 226.29 | 34.29 | 9.70 |
2019-04-12 18:03:00 | 2019-04-12 23:15:35 | 214.05 | 30.00 | 9.50 |
2019-04-12 16:44:21 | 2019-04-12 21:18:29 | 195.56 | 17.14 | 7.22 |
2019-04-12 15:39:01 | 2019-04-12 22:30:40 | 190.84 | 12.86 | 6.65 |
2019-04-12 15:52:37 | 2019-04-12 22:39:34 | 191.11 | 17.14 | 4.89 |
+-------------------+---------------------+--------+-------+-------+

For TCA
+-------------------+---------------------+--------+-------+-------+
Tstart�������������������������� | Tend������������������������������ | RA�������� | DEC���� | Proba |
[UTC time]������������������ | [UTC time]������������������ | [deg]�� | [deg] | [%] |
+-------------------+---------------------+--------+-------+-------|
2019-04-12 21:36:03 | 2019-04-13 02:57:34 | 214.70 | 33.64 | 7.23 |
2019-04-12 19:39:05 | 2019-04-13 03:06:35 | 213.02 | 31.82 | 6.49 |
2019-04-12 19:48:05 | 2019-04-13 02:12:36 | 215.48 | 31.82 | 6.24 |
2019-04-12 21:00:04 | 2019-04-13 03:24:35 | 216.87 | 33.64 | 4.96 |
2019-04-12 20:06:03 | 2019-04-13 03:33:35 | 223.34 | 33.64 | 4.83 |
2019-04-12 21:18:05 | 2019-04-12 03:42:35 | 219.04 | 33.64 | 4.43 |
2019-04-12 21:27:04 | 2019-04-12 03:51:35 | 217.78 | 33.46 | 3.74 |
+-------------------+---------------------+--------+-------+-------+

The Probability refers to the 2D spatial probability of the
GW skymap enclosed in a given tile. The size of the tiles are 4.2x4.2 deg2
for TRE and 1.8 x 1.8 deg2 for TCA.
These observations cover 73% and 38% of the 90% GW probability skymap for
TRE and TCA respectively. The typical 3 sigma limiting magnitude for a
2 minute exposure is 17 for TRE and 18 for TCA. Results of the on-going
analysis�� will be reported in a later GCNC.


GRANDMA (Global Rapid Advanced Network Devoted to the Multi-messenger
Addicts) is a network of robotic telescopes connected all over the
world with both photometry and spectrometry capabilities for Time-
domain Astronomy (https://grandma.lal.in2p3.fr/). Details on the TAROT
telescopes are available on the GRANDMA web pages or on
http://tarot.obs-hp.fr/

This circular is citable.

X.H. Han (NAOC), J.Y. Wei (NAOC), C. Wu (NAOC), L.P. Xin (NAOC),
D. Turpin (NAOC), N. LEROY (CNRS/LAL), S. ANTIER (CNRS/APC/CNES),
L. Huang (NAOC), Y. Xu (NAOC), H.B. Cai (NAOC), J. Wang (NAOC),
X.M. Lu (NAOC), Y.L. Qiu (NAOC), J.S. Deng (NAOC), L. Jia (NAOC),
S.C. Zou (NAOC), S.F. Liu (NAOC), Q.C. Feng (NAOC), H.L. Li (NAOC),
D.W. Xu (NAOC), Y.J. Xiao (NAOC), W.L. Dong (NAOC), Y.T. Zheng (NAOC),
P. P. Zhang (NAOC), R.S. Zhang (NAOC), E.W. Liang (GXU), X.G. Wang (GXU),
Z.G. Dai (NJU), X.Y. Wang (NJU), Y.G. Yang (HBNU), J.R. Mao (YNAO),
B. Cordier (CEA/AIM), S. Basa (CNRS/LAM), J.L. Atteia (UPS/IRAP),
D. Gotz (CEA/AIM), A. Claret (CEA/AIM), C. Lachaud (CNRS/APC),
R. Duque (CNRS/IAP), N. Dagoneau (CEA/AIM) S.N. Zhang (IHEP),
B.B. Wu (IHEP),
report on behalf of the SVOM Ground Follow-up Group:


We observed 7 sky regions (total: 1100 square degrees) to cover the
skymap of the advanced LIGO/Virgo trigger S190412M, with SVOM/GWAC,
at Xinglong Observatory equipped with a set of two types of wide angle
cameras: FFOV cameras (FOV~900 square degrees/camera, aperture = 3.5
cm) and JFOV cameras (FOV~150 square degrees/camera, aperture = 18
cm). SVOM/GWAC currently comprises 4 FFOV cameras and 16 JFOV cameras,
working with unfiltered band. The observations are operated in time-series
mode, taking one exposure every 15 seconds (10s exposure + 5s readout).
We estimate a 95% prior probability that these 7 regions contain the
true location of the source.
The coordinates of the 7 regions and observation time are list following:

No. Ra Dec start-obs(UTC) end-obs(UTC) Telescope_ID
1 12:16:08.501 +13:42:34.43 2019-04-12 14:21:03 2019-04-12 14:53:31 2
2 13:04:12.375 +13:07:23.42 2019-04-12 14:21:03 2019-04-12 14:53:31 2
3 13:01:14.699 +01:23:57.03 2019-04-12 14:21:03 2019-04-12 14:53:31 2
4 14:15:50.897 +35:59:33.54 2019-04-12 14:05:51 2019-04-12 14:20:11 2
5 15:42:30.509 +35:59:41.27 2019-04-12 14:05:51 2019-04-12 14:20:11 2
6 12:16:49.785 +01:39:44.92 2019-04-12 14:21:03 2019-04-12 14:53:31 2
7 14:47:20.959 +36:20:07.37 2019-04-12 14:05:51 2019-04-12 14:20:11 2

The covering map is available at:
http://cmm.svom.cn/gwpub/O3/S190412m/S190412m_GWAC.png
(user:svomo3 pwd:gwo3)

The first image was taken ~8 hours after the event trigger time. The
weather conditions were bad (cloudy) during the observations. A 3
sigma limiting magnitude of about 14 mag in R band is obtained in
our single frames. No credible new source is detected by our online
pipeline.
A more detailed image analysis including co-addition is ongoing with
our offline pipeline to search for transient candidates.

This circular is citable.

Kawabata, K. S., Nishinaka, Y., Akitaya, H., Sasada, M.
(Hiroshima U.), Tanaka, M. (Tohoku U.), Takarada, T.,
Oasa, Y. (Saitama U.), Sekiguchi, Y. (Toho U.),
Ohsawa, R., Morokuma, T., Niino, Y. (U. of Tokyo),
Murata, K. L., Shiraishi, K., Yatsu, Y. (Tokyo Tech),
Yanagisawa, K., Yoshida, M. (NAOJ),  Kamei, Y., Abe, F.,
Tristram, P. J. (Nagoya U.), Tominaga N. (Konan U.),
Onozato, H. (Nishi-Harima Astronomical Observatory),
Itoh, R. (Bisei Astronomical Observatory),
Utsumi, Y. (Stanford U./SLAC)
on behalf of J-GEM collaboration

We report our further/updated galaxy-targeted observations
for 197 galaxies (see the table below) selected from the
GLADE catalog (Dalya et al. 2016) in the probability
skymap of S190412m (GCN 24098
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 ) using the following
telescopes/instruments.
 - 50 cm MITSuME telescope at Akeno Observatory and a 3 color imager (g,
Rc, Ic)
 - 55 cm SaCRA telescope at Saitama University and MuSaSHI (r, i, z)
 - 61 cm Boller&Chivens telescope at Mt. John Observatory and Tripole5
(g, r, i)
 - 91 cm Okayama Astrophysical Observatory NIR Wide���Field Camera (J, H,
Ks)
 - 105 cm Schmidt telescope at Kiso Observatory and Tomo-e Gozen 20 deg2
FoV camera (no filter)
 - 150 cm Kanata telescope at Higashi-Hiroshima Observatory and HONIR
(Rc, H)
 - 200 cm Nayuta telescope at Nishi-Harima Astronomical Observatory and
NIC (J, H, Ks)

Those were mostly observed on 2019 Apr 12 and partly on
Apr 16 and 20. We found no apparent transient object in
these galaxies to the 5 sigma limiting magnitudes listed
below.

galid           ra       dec     NoFil g     R     I     J     H     K r     i     z       obsid
--------------- -------- ------- ----- ----- ----- ----- ----- ----- --- -- ----- ----- ----- -------------------------- -----
GL141846+305225 214.6935 30.8735  99.9   --- 20.76   --- 18.03 18.32   - --   ---   ---   --- Kiso_Schmidt,OAOWFC,Kanata-HONIR
GL124935+150900  192.396   15.15  99.9 18.89 19.14  18.6   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL144207+352623  220.531 35.4396 19.15   ---   ---   --- 19.42 19.17 19.  17   ---   ---   --- Nayuta,Kiso_Schmidt
GL142013+332950 215.0541 33.4972  99.9 20.04 20.16 18.93 18.76   ---   - --   ---   ---   --- MITSuME-Akeno,OAOWFC,Kiso_Schmidt
GL121809-005110 184.5373 -0.8527   ---  19.4   ---   --- 17.91 17.09 17.  09 19.66 19.33   --- Nayuta,BandC-Tripol
GL144212+335859 220.5516  33.983 19.38 19.36 20.14   ---   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL145602+333243  224.009 33.5454 17.71   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141357+322058 213.4856 32.3494  99.9 20.37 20.46 19.79   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL145541+331353 223.9212 33.2313 17.74 20.11 20.25 19.61   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL141937+333711  214.905 33.6198 17.72 20.04 20.16 19.41 18.76   ---   - --   ---   ---   --- MITSuME-Akeno,OAOWFC,Kiso_Schmidt
GL141348+323200  213.452 32.5335 18.17 20.37 20.46 19.79   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL142116+331858  215.316 33.3161  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141648+324701 214.1998 32.7837  99.9  20.1 20.17 18.24   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL145605+335817 224.0188 33.9714 18.13 20.39 20.12    19   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL142010+320453  215.042 32.0813  99.9   ---   ---   --- 18.46   ---   - --   ---   ---   --- Kiso_Schmidt,OAOWFC
GL141930+320951 214.8739 32.1641 18.23   ---   ---   --- 18.46   ---   - --   ---   ---   --- OAOWFC,Kiso_Schmidt
GL141400+322606  213.501  32.435 18.16 20.37 20.46 19.79   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL143602+333249 219.0079 33.5469  99.9 20.28 20.31 19.38   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL150311+340016 225.7977 34.0044  99.9 17.78    17 18.85   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL141553+321423  213.971 32.2398  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144850+333747 222.2104 33.6296  17.9   ---   ---   --- 18.39 18.23   - --   ---   ---   --- Kiso_Schmidt,Nayuta
GL142057+330254  215.239 33.0483  99.9   ---   ---   --- 19.89   --- 19.  89   ---   ---   --- Kiso_Schmidt,Nayuta
GL141935+315805  214.894 31.9682   ---   ---   ---   --- 18.46   ---   - --   ---   ---   --- OAOWFC
GL141543+323000 213.9295 32.4998 18.37   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141940+311209 214.9187 31.2026  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143933+342329 219.8879 34.3913 18.19   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143642+345514 219.1748 34.9205 17.79   ---   ---   ---  19.4 19.39 19.  38   ---   ---   --- Kiso_Schmidt,Nayuta
GL145219+342430 223.0801 34.4082  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141234+313025   213.14 31.5071  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142526+331232 216.3598  33.209  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144328+342849 220.8685 34.4804 18.68   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141730+340852  214.374 34.1477  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145608+330400 224.0347 33.0664 17.73 20.11   ---   ---   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL143939+335551  219.911 33.9308 17.42   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142045+322508 215.1877 32.4189  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142252+341218 215.7146 34.2051  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141946+313343 214.9433  31.562  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141557+321100 213.9882 32.1832  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141651+313633 214.2123 31.6093  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145317+344500 223.3209 34.7498  99.9   ---   ---   --- 18.91   ---   - --   ---   ---   --- OAOWFC,Kiso_Schmidt
GL150014+340145 225.0602 34.0293 16.77   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142914+335924   217.31   33.99  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144338+341310 220.9077 34.2193  18.3   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144753+345846 221.9717 34.9795 18.02   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145140+344338 222.9153 34.7271 17.92   ---   ---   --- 18.91   ---   - --   ---   ---   --- OAOWFC,Kiso_Schmidt
GL141713+312036  214.303 31.3432  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143724+341721 219.3511 34.2891 17.74   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145243+343036 223.1807 34.5101 17.06   ---   ---   --- 18.91   ---   - --   ---   ---   --- OAOWFC,Kiso_Schmidt
GL142226+340920 215.6068 34.1556 18.31   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144040+352521 220.1656 35.4225 18.49   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144726+333258 221.8566 33.5496 18.15   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141720+314233  214.334 31.7092 18.95   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145602+330229  224.008 33.0414 17.73 20.11   ---   ---   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL124843+122925 192.1793 12.4903  99.9   ---  18.5   ---   ---  17.1   - -- 18.33 18.93 18.93 Kanata-HONIR,Kiso_Schmidt,SaCRA-MuSaSHI
GL145431+334819 223.6294 33.8053 17.73   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141425+323945 213.6044 32.6625  99.9 20.02 20.29 19.53   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL142016+333321  215.066  33.556  99.9 20.04 20.16 19.41 18.76   ---   - --   ---   ---   --- MITSuME-Akeno,OAOWFC,Kiso_Schmidt
GL144534+344200 221.3928 34.6997  99.9   ---   ---   ---   ---   ---   - -- 19.43 20.41 20.41 Kiso_Schmidt,SaCRA-MuSaSHI
GL141511+314305 213.7977 31.7182 18.32   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144626+345538 221.6066 34.9273 18.08   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143657+333905 219.2358 33.6513 18.44 20.28 20.31 19.38   ---   ---   - --   ---   ---   --- Kiso_Schmidt,MITSuME-Akeno
GL141445+312118 213.6871 31.3549  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143252+343557  218.216 34.5991 17.75   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141958+321041 214.9927 32.1781 18.16   ---   ---   --- 18.46   ---   - --   ---   ---   --- OAOWFC,Kiso_Schmidt
GL144537+341839 221.4033 34.3108 18.93   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141302+312723 213.2579 31.4563 18.79   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144057+350758 220.2384 35.1328 17.91   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL150012+335457 225.0505  33.916 17.69   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141042+314031  212.675 31.6753 18.79   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143722+343456 219.3409 34.5822 17.54   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143449+354247 218.7044 35.7131 17.97   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141828+320756  214.618 32.1322  18.4   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144214+352814 220.5594 35.4705 19.15   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143131+340809 217.8781 34.1357  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145254+341026 223.2263  34.174 18.49   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145046+330813 222.6917 33.1371 18.27   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141227+325226  213.112  32.874  99.9   ---   ---   ---   ---   ---   - -- 19.61 19.89 19.89 Kiso_Schmidt,SaCRA-MuSaSHI
GL142743+331214  216.931 33.2039  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141301+320914  213.254 32.1538 17.52   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141511+324103  213.794 32.6841 17.17   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL120541-012224 181.4225 -1.3733   --- 19.53 19.31   ---   --- 16.44   - -- 20.21 19.73   --- Kanata-HONIR,BandC-Tripol
GL145346+343320 223.4403 34.5557 18.61   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL140447+315149 211.1959 31.8635 17.26   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145544+335031 223.9321 33.8419 17.59 20.39 20.12    19   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL143320+344841  218.333 34.8114 17.97   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144613+345553 221.5523 34.9315 18.08   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142340+340252 215.9175 34.0478  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143951+344708 219.9635 34.7854 19.16   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141330+314704  213.373 31.7844 10.53   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141930+320800 214.8758 32.1333 18.23   ---   ---   --- 18.46   ---   - --   ---   ---   --- OAOWFC,Kiso_Schmidt
GL141640+314129  214.168 31.6915  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142141+340654 215.4217  34.115 18.67   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL150805+342314   227.02 34.3872  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141937+311420  214.904 31.2388  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141706+321239  214.273  32.211 19.04   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141850+323007 214.7086 32.5018 18.23   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142901+345222 217.2545 34.8727  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143241+343907 218.1713 34.6519 17.75   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143639+352408 219.1643 35.4022 18.17   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143724+344755 219.3505 34.7985 19.13   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143812+345339  219.549 34.8941 18.94   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143840+350652 219.6651 35.1144 18.77   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142359+322217 215.9955 32.3714  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145041+340938 222.6718 34.1604 18.62   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144103+350854 220.2639 35.1483 17.91   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142047+303617  215.196 30.6046  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142310+320345 215.7929 32.0625  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141442+310132  213.673 31.0255  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141206+314943  213.025 31.8287 16.89   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141600+311410 213.9998 31.2362 19.25   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144613+345621 221.5526 34.9393 18.08   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141937+320803 214.9041 32.1342 18.23   ---   ---   --- 18.46   ---   - --   ---   ---   --- OAOWFC,Kiso_Schmidt
GL141317+321752  213.321 32.2979 18.16 20.37 20.46 19.79   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL144311+340241 220.7952 34.0448  99.9 19.36 20.14   ---   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL142858+343932 217.2399 34.6588  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144233+341714 220.6376 34.2873 18.17   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143710+333313 219.2925 33.5536  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145332+343927  223.382 34.6575 18.49   ---   ---   --- 18.91   ---   - --   ---   ---   --- OAOWFC,Kiso_Schmidt
GL143601+352640  219.005 35.4445 17.49   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142151+335650 215.4621 33.9471  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142308+322139  215.784 32.3609 18.07   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145319+345357 223.3282 34.8992  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144640+331804 221.6664 33.3012 18.03   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141233+305801 213.1386  30.967  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145020+335344 222.5816 33.8956 18.23   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142150+341001   215.46  34.167 18.67   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144204+343513 220.5152 34.5869  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145005+335048  222.521 33.8467 16.98   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141058+314921 212.7398 31.8225 11.23   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143328+334645  218.365 33.7791  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145554+330548 223.9732 33.0966 17.73 20.11   ---   ---   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL141626+304717 214.1094  30.788  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143234+354540 218.1412  35.761  18.2   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145035+351500 222.6477 35.2499 17.58   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142711+322917 216.7968 32.4881 18.27   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143255+334726 218.2305 33.7905 19.65   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144949+335127 222.4538 33.8575 16.98   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142951+340033 217.4642 34.0092 18.62   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144224+344918  220.601 34.8216 19.25   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144654+343915 221.7261 34.6542 14.34   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145223+350140 223.0957 35.0277  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL150644+342823 226.6854 34.4731 18.68   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145242+350514 223.1733 35.0873  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141626+304839 214.1094 30.8107  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141940+312139 214.9173 31.3609 17.49   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143916+351724 219.8159 35.2899 19.56   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144741+330740 221.9191 33.1278  18.2   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141600+310534 213.9973 31.0929 19.24   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145253+335347 223.2219 33.8965 17.09   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141125+314552  212.854 31.7644 19.07   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145941+340256  224.922  34.049 11.74   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143300+343649  218.252 34.6135 17.75   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145945+341118 224.9395 34.1884 17.65   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144941+331441 222.4229 33.2447 17.73   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141158+313603 212.9904 31.6007 19.24   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143628+353817 219.1182  35.638 18.35   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142350+321446 215.9577 32.2461 16.08   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144001+353730 220.0033 35.6249 18.96   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141320+312850 213.3334 31.4805  18.3   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143717+341608 219.3228 34.2688 17.79   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143445+332821 218.6891 33.4725 18.54   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144156+340041 220.4842 34.0114 19.38 19.36 20.14   ---   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL143217+345228  218.071 34.8745 10.06   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142807+324703 217.0273 32.7842  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144854+333728 222.2247 33.6244  17.9   ---   ---   --- 18.39 18.23   - --   ---   ---   --- Kiso_Schmidt,Nayuta
GL144724+330537 221.8515 33.0937  18.2   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143626+343044  219.107 34.5121 18.39   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141358+310446 213.4921 31.0794  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142314+325444 215.8095 32.9122  99.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143828+350144 219.6172 35.0288  17.9   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144731+330606 221.8801 33.1018  18.2   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145347+323627 223.4462 32.6076 17.87   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144456+333012 221.2344 33.5034  16.6   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144955+345245 222.4779 34.8792 18.01   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141303+311435 213.2638  31.243 18.96   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143517+354339 218.8189 35.7274 18.01   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143310+350102  218.292 35.0172 18.11   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145013+341638 222.5559 34.2772 17.85   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145405+341331 223.5214 34.2252 18.01   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143114+342949 217.8072  34.497 17.66   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144904+335315 222.2657 33.8874 18.88   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL145516+333604  223.816 33.6011 10.52   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL143530+352409 218.8757 35.4024 17.49   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144948+340640 222.4499 34.1111 17.64   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144138+342702 220.4068 34.4505 16.94   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141318+311401  213.327 31.2335 18.96   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL142006+311211 215.0264  31.203 17.45   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144932+332353 222.3853 33.3981 17.71   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144526+352547 221.3572 35.4297  18.1   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141719+341714 214.3286 34.2873 18.73   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL150140+332656 225.4154  33.449 17.82   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL151238+345135 228.1573 34.8598 16.24   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144732+345715 221.8814 34.9543 18.02   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144243+334919 220.6794 33.8221 19.43 19.36   ---   ---   ---   ---   - --   ---   ---   --- MITSuME-Akeno,Kiso_Schmidt
GL143710+350914  219.293 35.1539 18.86   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL144948+345803 222.4484 34.9675 18.01   ---   ---   ---   ---   ---   - --   ---   ---   --- Kiso_Schmidt
GL141827+310941  214.611 31.1615 17.47   ---   ---   --- 18.03   ---   - --   ---   ---   --- OAOWFC,Kiso_Schmidt

Note that a limiting mag = 99.9 for Kiso Schmidt is due to failure
in our real-time data analysis (typical depth is about 18.5 mag).