IceCube-171106A
GCN Circular 22105
Subject
IceCube-171106A - IceCube observation of a high-energy neutrino candidate
Date
2017-11-06T22:37:07Z (8 years ago)
From
Ignacio Taboada at Georgia Inst of Tech <itaboada@gatech.edu>
The IceCube Collaboration (http://icecube.wisc.edu/) reports:
On November 6, 2017 IceCube detected a track-like, very-high-energy
event with a high probability of being of astrophysical origin. The
event was identified by the Extremely High Energy (EHE) track event
selection. The IceCube detector was in a normal operating state. EHE
events typically have a neutrino interaction vertex that is outside the
detector and produce a muon that traverses the detector volume, and have
a high light level (a proxy for energy).
After the initial automated alert
(https://gcn.gsfc.nasa.gov/notices_amon/17569642_130214.amon), more
sophisticated reconstruction algorithms have been applied offline, with
the direction refined to:
Date: 17/11/06 (yy/mm/dd)
Time: 18:39:39.21 UT
RA: 340.00 (-0.50/+0.70 deg 90% PSF containment) J2000
Dec: +7.40 (-0.25/+0.35 deg 90% PSF containment) J2000
Initial offline analysis of this event indicates that the event is
consistent with being produced by a neutrino with energy in excess of 1
PeV. The initially reported signalness and energy values are likely
underestimated.
As indicated in the initial notice, the neutrino candidate is temporally
close to Fermi GBM trigger 531686417. However, recently, Fermi GBM has
been triggering frequently on a galactic source that is not spatially
coincident with the event reported here.
We encourage follow-up by ground and space-based instruments to help
identify a possible astrophysical source for the candidate neutrino.
The IceCube Neutrino Observatory is a cubic-kilometer neutrino detector
operating at the geographic South Pole, Antarctica. The IceCube realtime
alert point of contact can be reached at roc@icecube.wisc.edu
GCN Circular 22106
Subject
Fermi-GBM Trigger 531686417 / 171106778 is not related to ICECUBE-171106A
Date
2017-11-06T23:10:37Z (8 years ago)
From
Rachel Hamburg at UAH <rkh0007@uah.edu>
R. Hamburg (UAH) reports on behalf of the Fermi-GBM team:
���At 18:39:39.21 UT, a candidate neutrino ICECUBE-171106A was reported (AMON
ICECUBE EHE NOTICE 130214; GCN 22105) that is temporally coincident with
the Fermi-GBM trigger 531686417 / 171106778. However, this trigger was due
to a pulse from the Be X-ray binary Swift J0243.6+6124 (Cenko et al., GCN
21960) and is spatially inconsistent with the neutrino event.
Fermi-GBM has been triggering on emission from Swift J0243.6+6124 since Oct
30th (Bissaldi et al., GCN 22075), and to reduce the trigger rate due to
this source, the GBM team has disabled some of the onboard triggering
algorithms (Briggs et al., GCN 22097). The GBM team will not issue GCN
Circulars to classify individual events that were misclassified in
automatic notices.
The ground-based GBM subthreshold transient search (
https://gcn.gsfc.nasa.gov/admin/fermi_gbm_subthreshold_announce.txt) has
not been modified and will continue to generate GCN Notices due to Swift
J0243.6+6124 (Briggs et al., GCN 22047).���
GCN Circular 22109
Subject
INTEGRAL observation of IceCube-171106A
Date
2017-11-08T15:32:54Z (8 years ago)
From
Volodymyr Savchenko at ISDC,U of Geneve <savchenk@in2p3.fr>
V. Savchenko, C. Ferrigno (ISDC, University of Geneva, CH)
P. Ubertini, A. Bazzano, L. Natalucci. J. Rodi (INAF IAPS-Roma, Italy)
S. Mereghetti (INAF IASF-Milano, Italy)
P. Laurent (CEA, Saclay, France)
E. Kuulkers (ESAC/ESA, Madrid, Spain)
Using INTEGRAL we have performed a search for a prompt gamma-ray
counterpart of the cosmic neutrino candidate IceCube-171106A
(GCN 22105).
At the time of the event (2017-11-06 18:39:39 UTC, hereafter T0),
INTEGRAL was operating in nominal mode. The peak of the neutrino
localization probability was at an angle of 44 deg with respect to
the spacecraft pointing axis. This orientation implies strongly
suppressed response of ISGRI and IBIS/Veto, and somewhat suppressed
response of SPI-ACS.
The background within +/-300 seconds around the event was very
stable.�� We do not detect any significant counterparts and estimate
a 3-sigma upper limit on the 75-2000 keV fluence of 2.7e-07 erg/cm^2
for a burst lasting less than 1 s with a characteristic short GRB
spectrum (an exponentially cut off power law with alpha=-0.5 and
Ep=600 keV) occurring at any time in the interval within 300 s
around T0.
For a typical long GRB spectrum (Band function with alpha=-1,
beta=-2.5, and Ep=300 keV), the derived peak flux upper limit is
~3e-07 (8.6e-07) erg/cm^2/s at 1 s (8 s) time scale in 75-2000 keV
energy range.
GCN Circular 22114
Subject
HAWC follow-up of IceCube-171106A
Date
2017-11-09T22:42:33Z (8 years ago)
From
Simone Dichiara at UNAM <sdichiara@astro.unam.mx>
Simone Dichiara (UNAM-IA), Israel Martinez (University of Maryland),
J.A. Garc��a-Gonz��lez (UNAM-IF), Ignacio Taboada (Georgia Tech)
report on behalf of the HAWC collaboration
(https://www.hawc-observatory.org/collaboration/):
On 2017/11/06 18:39:39.21 UT IceCube detected a track-like,
very-high-energy event with a high probability of being of
astrophysical origin, at RA=340.00d and Dec=+7.40d J2000
as reported in GCN circular 22105.
The event was not in the field of view of HAWC, so we
analyze the data following two different approaches:
*We searched for a steady source in archival data from November
2014 to September 2017. Assuming a spectral index of -2.5 we
searched in the reported 90% PSF containment circle.The maximum
significance is 1.57 sigma at RA=339.48deg and Dec=7.78deg. We
estimate the number of trials to be ~20. We set an upper limit
95% CL on gamma rays for this period of:
E^2 dN/dE = 4.60e-13 (E/TeV)^-0.5 TeV cm^-2 s^-1.
*We also performed a study using data corresponding to the two
nearest transits of IceCube-171106 in HAWC���s field of view (MJD
58062.96-58063.22 and 58063.95-58064.21). Using the same spectral
index and search window, the maximum significance is 1.2 sigma at
RA=340.35deg and Dec=7.12deg.
We set an upper limit 95% CL on gamma rays for this period of:
E^2 dN/dE = 9.38e-12 (E/TeV)^-0.5 TeV cm^-2 s^-1.
HAWC is a very-high-energy gamma-ray observatory located in
Central Mexico at latitude 19 deg North. It operates 24 hours
per day with over 95% duty cycle. HAWC has an instantaneous
field of view of 2 sr and surveys 2/3 of the sky every day.
It is sensitive to gamma rays from 300 GeV to 100 TeV.
GCN Circular 22115
Subject
IceCube-171106A: Swift Observations
Date
2017-11-10T00:24:52Z (8 years ago)
From
Azadeh Keivani at PSU <keivani@psu.edu>
A. Keivani (PSU), D.B. Fox (PSU), J.J. DeLaunay (PSU), J.A. Kennea (PSU),
P.A. Evans (U. Leicester), D.F. Cowen (PSU), J.P. Osborne (U. Leicester),
and F.E. Marshall (GSFC) report on behalf of the Swift-IceCube
collaboration:
Swift has observed the field of the IceCube EHE event, IceCube-171106A
(Revision 0, <https://gcn.gsfc.nasa.gov/notices_amon/50579430_130033.amon>
https://gcn.gsfc.nasa.gov/notices_amon/17569642_130214.amon; subsequently
updated to Revision 1, GCN #22105), utilizing the on-board 19-point tiling
pattern to cover a region centered on RA,Dec (J2000) = (340.0d, +7.4d),
with a radius of approximately 0.8 degrees. Swift-XRT collected ~750 s per
field of PC mode data per tile. The observations were taken between 21:51:12
UT on 2017 November 06 and 11:52:10 UT on 2017 November 07 (i.e. from 11.5
ks to 62.0 ks after the neutrino trigger), and covered 2.1 square degrees.
Fourteen X-ray sources are detected in the observations, of which five lie
within the refined neutrino localization.
Of the fourteen identified sources, two correspond to known X-ray emitters,
X1 to 1RXS J224124.3+071253, and X3 to UGC 12138. Two further sources, X4
and X14, have positions consistent with ROSAT Faint Source Catalog objects.
Five further sources have potential counterparts from the SIMBAD database.
X2 matches to HD 215109; detection of this optically bright star may be due
to optical loading rather than bona fide X-ray emission. X5 matches to 87GB
223537.9+070825 (5BZQJ2238+0724 in BZcat), which is a flat-spectrum radio
quasar and known blazar, not previously reported to emit in X-rays. X6
matches to PMN J2243+0716, a radio-bright quasar. X8 matches to the GALEX
���blue object��� source 2690384041306227301. X10 matches to WISE
J224206.68+073148.3, a known BL Lac-type blazar. Observing X-ray emission
(or in the case of HD 215109, an optical loading detection) at the level
seen here from any of these sources would not be remarkable.
Given the recent observation of high-energy gamma-ray activity from TXS
0506+056, potentially associated with the high-energy neutrino
IceCube-170922A (GCN #21916, ATel #10791, ATel #10817), we note in
particular the two X-ray luminous blazars within the neutrino localization,
87GB 223537.9+070825 and WISE J224206.68+073148.3.
Identified sources:
Source RA Dec r_90 R_x** Catalog/Notes
=================================================================
X1* 22:41:24.15 +07:12:57.6 4.1��� 61(9) 1RXS J224124.3+071253
X2 22:42:48.20 +06:40:14.2 4.4��� 82(3) HD 215109 (optical loading)
X3 22:40:17.14 +08:03:13.4 2.1��� 410(3) UGC 12138
X4 22:41:20.34 +06:48:58.7 5.4��� 32(9) 1RXS J224122.2+064851 (?)
X5* 22:38:10.41 +07:24:12.8 5.2��� 30(8) 87GB 223537.9+070825
X6 22:43:05.82 +07:16:34.7 5.7��� 9(5) PMN J2243+0716
X7 22:37:54.30 +07:22:02.9 6.8��� ?
X8 22:38:59.95 +07:02:43.7 6.3��� 4(4) GALEX 2690384041306227301
X9* 22:38:47.59 +07:22:24.8 6.1��� ?
X10* 22:42:06.68 +07:31:52.6 7.4��� 7(4) WISE J224206.68+073148.3
X11 22:40:15.96 +07:48:42.2 5.9��� 9(4)
X12 22:40:26.17 +06:50:14.3 5.9��� 4(4)
X13 22:38:21.18 +08:04:20.7 4.9��� 3(5)
X14* 22:39:52.53 +07:11:57.1 6.7��� 9(5) 1RXS J223951.8+071132 (?)
=================================================================
* inside the refined 90%-confidence neutrino localization
** R_x indicate count rate in units of counts ks^-1.
Of the identified sources, the following lie outside the refined
90%-confidence neutrino localization reported by IceCube (GCN #22105): X2,
X3, X4, X6, X7, X8, X11, X12, X13. The remaining sources (indicated with
asterisks by their source names) lie within the neutrino localization.
Excluding identified sources, the 3-sigma upper limit on the count rate in
the rest of the field is 0.01 ct s^-1, which corresponds to a 0.3-10 keV
flux of 4.1e-13 erg cm^-2 s^-1 for a typical AGN spectrum (NH=3e20 cm^-2,
Gamma=1.7). Overlaps between the different tiles account for 0.5 square
degrees: in these regions the 3-sigma upper limit is 0.009 ct s^-1,
corresponding to 3.7e-13 erg cm^-2 s^-1.
The neutrino localization was in the Swift's Burst Alert Telescope's (BAT)
field of view from 404 seconds to 117 seconds prior to the EHE alert time.
There were no triggered GRBs during this time. Using the 287 second BAT
survey exposure (starting at 18:32:55 UT on 2017 November 06) we searched
for any hard X-ray emission inside the 90%-confidence neutrino
localization. We found no point source and set a 4-sigma upper limit on the
fluence during that time period of 5e-7 erg cm^-2 (15-150 keV) assuming a
photon index of -2.
GCN Circular 22132
Subject
Fermi-LAT Gamma-ray Observations of IceCube-171106A
Date
2017-11-18T01:29:26Z (8 years ago)
From
Sara Buson at GSFC/Fermi <sara.buson@gmail.com>
S. Buson (NASA/GSFC), M. Kreter (Wurzburg Univ.),
D. Kocevski (NASA/MSFC) report on behalf of the Fermi-LAT collaboration
We report follow-up observations of the [very] high-energy IceCube-171106A
neutrino event (GCN #22105) with all-sky survey data from the Large Area
Telescope (LAT), on board the Fermi Gamma-ray Space Telescope. The IceCube
event was detected on 2017-1-06 18:39:39.21 UTC (T0) with J2000 position
RA =340.25 deg, Dec = 7.314 deg (14.99 arcmin 50% containment). The closest
cataloged >100 MeV gamma-ray source is 3FGL J2234.8+0945, at a distance of
roughly 2.9 deg. The source is associated with the pulsar PSR J2234+0944.
We searched for the existence of intermediate (days to months) timescale
emission from a new gamma-ray transient source [or excess emission from a
known catalog source]. Preliminary analysis indicates no significant excess
gamma-ray emission (0.1 - 300 GeV) within the IceCube-171106A 50% confidence
localisation. Assuming a power-law spectrum (photon index = 2.2 fixed) for a point
source at the IceCube position, the >100 MeV photon flux upper limits
(95% confidence) are < 2.0 x 10^-7 ph cm^-2 s^-1 in one day of exposure
prior to T0, and < 3.4 x 10^-8 ph cm^-2 s^-1 in one week of exposure prior to T0,
and < 1.8 x 10^-9 ph cm^-2 s^-1 in eight months of exposure prior to T0.
Swift-XRT follow up observations of the IceCube-171106A field by
Keivani et al (GCN #22115) reported the detection of several X-ray sources.
Integrating the LAT data for the time intervals aforementioned, no significant
gamma-ray emission is observed consistent with these sources.
Because Fermi operates in an all-sky scanning mode, regular gamma-ray
monitoring of this source region will continue. For this source the Fermi LAT
contact person is S. Buson (email: sara.buson at nasa.gov).
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.
GCN Circular 22167
Subject
INTEGRAL pointed follow-up of IceCube-171106A
Date
2017-11-24T21:08:15Z (8 years ago)
From
Marcos Santander at U of Alabama <jmsantander@ua.edu>
On 2017-11-06 18:39:39 UTC the IceCube detector observed an energetic neutrino event with a high probability of being astrophysical in origin (GCN 22105). The best-fit position of the neutrino provided by IceCube is RA2000 = 340.0 (-0.5/+0.5) deg and Dec2000 = 7.4 (-0.25/+0.35) deg, with uncertainties quoted at the 90% confidence level.
Pointed Target-of-Opportunity observations of the neutrino location with INTEGRAL were obtained between 2017-11-16 19:07 UTC and 2017-11-17 08:28 UTC for a total observation time of 45 ks. A preliminary analysis of the data did not reveal any new sources in the combined ISGRI or JEM-X mosaics. The typical 3-sigma sensitivity reached for the position of IceCube-171106A was 1.9 mCrab (2.9e-11 erg/cm2/s) in JEM-X 3-10 keV mosaic and 3.5 mCrab (2.7e-11 erg/cm2/s) in 20-40 keV ISGRI mosaic. INTEGRAL observations of the neutrino position at the time of the trigger were reported in GCN 22109.
We thank the INTEGRAL Science Operations Centre (ESA/ESAC, Madrid, Spain) and the Mission Operations Centre (ESA/ESOC, Darmstadt, Germany) for their prompt scheduling of these observations.
M. Santander (University of Alabama, US)
V. Savchenko (ISDC, University of Geneva, CH)
A. Keivani (Dept. of Physics, Penn State University, US)
E. Gotthelf (Columbia University, US)
C. Ferrigno (ISDC, University of Geneva, CH),
P. Ubertini, A. Bazzano, L. Natalucci (INAF IAPS-Roma, Italy),
S. Mereghetti (INAF IASF-Milano, Italy),
P. Laurent (CEA, Saclay, France), E. Kuulkers (ESTEC/ESA, The Netherlands)
GCN Circular 22173
Subject
Pan-STARRS follow-up of IceCube-171106A
Date
2017-11-28T12:57:11Z (8 years ago)
From
O. McBrien at QUB <omcbrien02@qub.ac.uk>
O. McBrien, K. W. Smith, S.J. Smartt, D. R. Young (Queen's University
Belfast), M. Huber, K. C. Chambers, H. Flewelling, M. Willman, A.
Schultz, E. Magnier, C. Waters, J. Bulger, R. J. Wainscoat (IfA,
Hawaii), D. Wright, (Univ. of Minnesota),
Further to the detection of the Extremely High Energy neutrino event
IceCube-171106A (see GCN #22105), we report Pan-STARRS1 imaging of the
field and the search for optical transients.
We observed the field of the neutrino event at RA=340.0 degrees and
DEC=+7.4 degrees (J2000) from MJD 58065.34 (2017-11-08 08:09:36.0
UTC), 37.44 hrs following the IceCube detection with the Pan-STARRS1
telescope in both the i-band and z-band filters (Chambers et al.
arXiv:1612.05560). Difference imaging with respect to the Pan-STARRS1
3Pi stacked reference sky reached 5-sigma limiting magnitudes of
around i~22.5. Observations were repeated on 10 subsequent nights.
Similar to Lipunov et al. (GCN 22104), we find no bright transient
source (i,z < 20) in the field. We found 7 fainter transients, which
are not known AGN or variable stars, within 1.3 degrees of the
estimated position of the neutrino (RA: 340.00, Dec: +7.40). These are
all detected over multiple nights. None of them appear to be rising or
have a lightcurve that points at a possible temporal coincidence with
IceCube-171106A, though two are contained within a 0.7 degree (42
arcmin) radius of the neutrino detection. Three are supernova like
candidates, and four are coincident with galaxy cores. These nuclear
transients are probably real, but difficult to distinguish between low
level nuclear variability and a true transient source. We report the
discovery magnitudes, dates and sky locations of the transients for
the transients in the 0.7 degree (42 arcmin) radius and those outside
it separately as follows.
Within 0.7 degree of IceCube-171106A
PS Name | RA (J2000) | Dec (J2000) | Ang. Separation (arcmin) | Disc. Date | Disc. Mag. | Notes
PS17fcc | 22 41 58.64 | +07 46 53.8 | 37.3 | 20171108 | 21.54 i | (1)
PS17eym | 22 39 22.13 | +07 16 36.4 | 11.9 | 20171108 | 21.48 i | (2)
Outside 0.7 degree of IceCube-171106A, but within PS1 footprint
PS Name | RA (J2000) | Dec (J2000) | Ang. Separation (arcmin) | Disc. Date | Disc. Mag. | Notes
PS17fcd | 22 44 01.84 | +08 13 27.6 | 77.7 | 20171109 | 21.53 z | (3)
PS17eyn | 22 42 24.63 | +06 55 02.7 | 46.1 | 20171108 | 21.64 I | (4)
PS17fem | 22 42 19.31 | +06 42 38.0 | 53.9 | 20171110 | 21.95 I | (5)
PS17eyo | 22 40 40.92 | +06 26 29.6 | 58.4 | 20171108 | 22.16 I | (6)
PS17eyl | 22 39 02.90 | +06 25 26.3 | 60.2 | 20171108 | 21.23 i | (7)
(1) Nuclear transient candidate located 0.59 arcsec N, 0.28 arcsec W
of host galaxy (SDSS J224158.66+074653.2). Transient is within 42
arcmin of neutrino detection.
(2) SN-like candidate associated
with galaxy SDSS J223922.20+071638.0, located 1.80 arcsec S, 0.97
arcsec W from galactic centre, with a host photometric redshift 0.38
+/- 0.11. Transient is within 42 arcmin of neutrino detection.
(3) Nuclear transient candidate located 0.37 arcsec N, 0.13 arcsec W
of host galaxy (SDSS J224401.85+081327.5). Difference imaging shows
positive and negative net flux, implying some galactic core activity.
(4) Nuclear transient candidate located 0.58 arcsec N, 0.84 arcsec E
of host galaxy (SDSS J224224.58+065502.1).
(5) Nuclear transient candidate located 0.57 arcsec N, 0.41 arcsec E
of host galaxy (SDSS J224219.29+064237.5).
(6) SN-like candidate not matched with catalogued galaxy.
(7) SN-like candidate associated with galaxy SDSS J223902.90+062526.6,
located 0.28 arcsec S, 0.04 arcsec E from galactic centre, with a host
photometric redshift 0.24 +/- 0.10.
GCN Circular 22283
Subject
IceCube-171106A: Konus-Wind upper limits
Date
2017-12-25T10:45:15Z (7 years ago)
From
Anna Kozlova at Ioffe Institute <ann_kozlova@mail.ioffe.ru>
A. Kozlova, S. Golenetskii, R.Aptekar, D. Frederiks, P. Oleynik,
M. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline,
on behalf of the Konus-Wind team, report:
Using Konus-Wind (KW) data, we have performed a search for
a gamma-ray transient around the time of the cosmic neutrino
candidate IceCube-171106A (2017-11-06 18:39:39.21 UT,
hereafter T0; Taboada, GCN 22105;
https://gcn.gsfc.nasa.gov/notices_amon/17569642_130214.amon)
No triggered KW event happened from ~6.7 hours before and up to ~1.8
days
after T0. The closest waiting-mode event was ~7.7 hours before T0.
Using waiting-mode data within the interval T0 +/- 1000 s,
we found no significant (> 5 sigma) excess over the background
in both KW detectors on temporal scales from 2.944 s to 100 s in the
80-1000 keV band.
Significant variations in the 20-80 keV band is due to activity of Swift
J0243+61.
We estimate an upper limit (90% conf.) on the 10 keV ��� 10 MeV fluence
to 9.0x10^-7 erg/cm^2 for a burst lasting less than 2.944 s and having a
typical KW short GRB spectrum (an exponentially cut off power law with
alpha =-0.5 and Ep=500 keV). For a typical long GRB spectrum (the Band
function with alpha=-1, beta=-2.5, and Ep=300 keV), the corresponding
limiting peak flux is 3.1x10^-7 erg/cm^2/s (10 keV - 10 MeV, 2.944 s
scale).
All the quoted values are preliminary.
GCN Circular 22945
Subject
IceCube-171106A: MASTER optical observation
Date
2018-07-14T12:49:20Z (7 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tiurina, A.Kuznetsov, V.Chazov,
I. Gorbunov, D. Vlasenko, D.Zimnukhov, D.Kuvshinov, P.Balanutsa, V.Vladimirov
Lomonosov Moscow State University,SAI
D. Buckley,
South African Astronomical Observatory (SAAO)
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias (IAC)
A. Tlatov, V.Senik, D. Dormidontov
Kislovodsk Solar Station of the Pulkovo Observatory
R. Podesta, F. Podesta, C. Lopez, C.Francile
Observatorio Astronomico Felix Aguilar (OAFA)
H.Levato,
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
O. Gres, N.M.Budnev, Yu.Ishmuhametova
Irkutsk State University (ISU)
A. Gabovich, V. Yurkov, Yu. Sergienko
Blagoveschensk Educational State University (BSPU)
MASTER Global Robotic Net observed the field of the IceCube EHE event
IceCube-171106A Taboada et al. GCN 22105
(also observed by Swift, see Keivani et al. ATEL #10942)
The IC171106A altitude at alert time (Date: 17/11/06 18:39:39.21 UT
J2000 RA:340.00 (-0.50/+0.70 deg 90% PSF containment)
Dec: +7.40 (-0.25/+0.35 deg 90% PSF containment))
MASTER-IAC (Tenerife)
Object: Altitude: 54.48 Azimuth: 300.17
Sun: Altitude: -5.64 Azimuth: 74.70
Moon: Altitude: -22.37 Azimuth: 232.01
MASTER-SAAO (South Africa)
Object: Altitude: 49.68 Azimuth: 169.40
Sun: Altitude: -18.49 Azimuth: 56.02
Moon: Altitude: -11.82 Azimuth: 255.21
MASTER-Kislovodsk (Russia)
Object: Altitude: 45.89 Azimuth: 43.01
Sun: Altitude: -50.59 Azimuth: 123.99
Moon: Altitude: 26.64 Azimuth: 269.05
MASTER-Tavrida
Object: Altitude: 48.79 Azimuth: 31.15
Sun: Altitude: -44.81 Azimuth: 115.65
Moon: Altitude: 20.62 Azimuth: 263.71
MASTER-Kislovodsk pointed to the IC 171106A at 2017-11-06 18:40:45UT, 66s after trigger time .
There were 4 alert images:
Date,UT Exp mlim MASTERtube
2017-11-06 18:50:16 180 19.3 EAST
2017-11-06 18:47:06 180 19.3 EAST
2017-11-06 18:43:56 180 19.1 EAST
2017-11-06 18:40:45 180 18.9 EAST
then MASTER-Kislovodsk returned to Fermi trigger 531665037 inspection https://gcn.gsfc.nasa.gov/other/531665037.fermi (GRB_TIME: 17/11/06 12:43:52.33UT 02h 00m 50s +59d 29' 24")
MASTER-SAAO was pointed to IC 171106A at 2017-11-06 18:40:50UT 71s after trigger time
Unfiltered limits of alert images are the following:
Date,UT Exp mlim MASTER_tube
2017-11-06 18:40:50 540 20.3 EAST
2017-11-06 18:40:50 180 19.9 EAST
2017-11-06 18:40:50 540 20.6 WEST
2017-11-06 18:40:50 180 20.2 WEST
2017-11-06 18:44:07 180 20.0 EAST
2017-11-06 18:44:07 180 20.2 WEST
2017-11-06 18:47:22 180 20.0 EAST
2017-11-06 18:50:38 180 20.0 EAST
2017-11-06 18:50:38 180 20.1 WEST
2017-11-29 18:44:51 180 19.4 EAST
2017-11-29 18:44:51 540 19.6 EAST
2017-11-29 18:44:51 180 19.1 WEST
2017-11-29 18:44:51 540 19.9 WEST
2017-11-29 18:49:52 180 19.0 EAST
2017-11-29 18:49:52 180 19.4 WEST
2017-11-29 18:53:56 180 18.9 EAST
2017-11-29 18:53:56 180 19.1 WEST
2017-11-29 19:11:09 540 19.8 EAST
2017-11-29 19:11:09 180 19.0 EAST
2017-11-29 19:11:09 180 19.4 WEST
2017-11-29 19:11:09 540 20.0 WEST
2017-11-29 19:17:27 180 19.1 EAST
2017-11-29 19:17:27 180 19.3 WEST
2017-11-29 19:24:21 180 19.1 EAST
2017-11-29 19:24:21 180 19.3 WEST
2017-11-29 19:30:27 180 19.0 EAST
2017-11-29 19:30:27 180 19.3 WEST
MASTER-IAC pointed to the IC 171106A at 2017-11-06 18:41:11UT 91.8s after trigger time.
The Sun_Altitude was -5.64, and so as MASTER-Kislovodsk and MASTER-SAAO followed up alert observations,
MASTER-IAC followed Fermi inspection after sunset, and followed IceCube inspection on next day by usual inspect program
2017-11-07 19:33:49 540 20.0 EAST
2017-11-07 19:33:49 180 19.3 EAST
2017-11-07 19:37:42 540 20.0 WEST
2017-11-07 19:37:42 180 19.6 WEST
2017-11-07 19:37:36 180 19.4 EAST
2017-11-07 19:41:35 180 19.6 WEST
2017-11-07 19:41:35 180 19.4 EAST
2017-11-07 19:45:36 180 17.8 WEST
2017-11-07 19:49:45 180 18.7 EAST
2017-11-07 19:53:17 180 18.9 EAST
2017-11-07 19:53:17 180 18.0 WEST
MASTER-Tavrida started inspect IC171106A in a weak as usual inspect
program on 2017-11-13 19:03:59 UT with the following unfiltered limits
Date,UT Exp mlim MASTER_tube
2017-11-13 19:55:03 180 18.4 EAST
2017-11-13 19:55:03 180 17.8 WEST
2017-11-13 19:51:01 180 18.8 WEST
2017-11-13 19:47:28 180 18.8 WEST
2017-11-13 19:32:55 180 18.8 WEST
2017-11-13 19:29:21 180 18.8 WEST
2017-11-13 19:25:45 540 19.5 WEST
2017-11-13 19:25:45 180 18.8 WEST
2017-11-13 19:07:32 180 18.0 WEST
2017-11-13 19:03:59 180 18.0 WEST
There is one BL Lac type object with Radio and Gamma inside
IceCube error box (see Gamma-ray blazar candidates (Sowards-Emmerd+, 2005)
J223810.3+072413 .
There are large number AGN and QSO candidates.
This message may be cited.