GRB 160314A
GCN Circular 19451
Subject
GRB 160314A: 15 GHz upper limits from AMI
Date
2016-05-23T18:53:30Z (9 years ago)
From
Kunal Mooley at Oxford U <kunal.mooley@physics.ox.ac.uk>
K. P. Mooley, T. D. Staley, R. P. Fender (Oxford), G. E. Anderson
(Curtin), C. Rumsey, D. Titterington, S. Carey, J. Hickish, Y. C.
Perrott, N. Razavi-Ghods, P. Scott (Cambridge), K. Grainge, A. Scaife
(Manchester)
The AMI Large Array robotically triggered on the Swift alert for GRB
160314A (D'Elia et al., GCN 19182) as part of the 4pisky program, and
subsequent follow up observations were obtained up to 10 days
post-burst. Our observations at 15 GHz on 2016 Mar 14.65, Mar 15.81, Mar
17.73, Mar 21.82, and Mar 24.91 (UT) do not reveal any radio source at
the XRT location (Osborne et al., GCN 19185), with 3sigma upper limits
of 280 uJy, 100 uJy, 270 uJy, 100 uJy, and 320 uJy respectively.
We thank the AMI staff for scheduling these observations. The AMI-GRB
database is a log of all GRB follow up observations with the AMI, and is
available at http://4pisky.org/ami-grb/.
GCN Circular 19203
Subject
GRB 160314A: Continued RATIR Optical and NIR Observations
Date
2016-03-16T22:03:39Z (10 years ago)
From
V. Zach Golkhou at ASU/RATIR <golkhou@gmail.com>
V. Zach Golkhou (ASU), Nat Butler (ASU), Alan M. Watson (UNAM), Alexander
Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox
(STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara
(GSFC/STScI), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico
Ramirez-Ruiz (UCSC), Jos�� A. de Diego (UNAM), Leonid Georgiev (UNAM), Jes��s
Gonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM), Neil Gehrels (GSFC), Harvey
Moseley (GSFC), John Capone (UMD), and Vicki Toy (UMD) report:
We observed the field of GRB 160314A (D'Elia et al., GCN 19182) with the
Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the
1.5m Harold Johnson Telescope at the Observatorio Astron��mico Nacional on
Sierra San Pedro M��rtir from 2016/03 16.12 to 2016/03 16.35 UTC (39.43 to
44.80 hours after the BAT trigger), obtaining a total of 3.56 hours
exposure in the r and i bands and 1.49 hours exposure in the Z, Y, J, and H
bands.
For a source within the Swift-XRT error circle (Osborne et al., GCN 19185),
in comparison with the SDSS DR9 and 2MASS catalogs, we obtain the following
detections and 3-sigma upper limit:
r 23.48 +/- 0.26
i 22.84 +/- 0.16
Z 22.08 +/- 0.17
Y 22.32 +/- 0.22
J > 22.45
H 21.87 +/- 0.25
These magnitudes are in the AB system and are not corrected for Galactic
extinction in the direction of the GRB. Our observations (see, also, Butler
et al., GCN 19196) are consistent with a continued, slow source fading as
reported by the GROND team (Schweyer et al, GCN 19200).
We thank the staff of the Observatorio Astron��mico Nacional in San Pedro
M��rtir.
GCN Circular 19200
Subject
GRB 160314A: GROND optical/NIR observations
Date
2016-03-16T15:55:55Z (10 years ago)
From
Jan Bolmer at MPE/Garching <jan@bolmer.de>
T. Schweyer, J. Bolmer and J. Greiner (all MPE Garching) report on
behalf of the GROND team:
We observed the field of GRB 160314A (Swift trigger 679120; D'Elia et
al., GCN #19182) simultaneously in g'r'i'z'JHK with GROND (Greiner et al.
2008, PASP 120, 405) mounted at the 2.2m MPG telescope at the ESO La Silla
Observatory (Chile).
Observations started at 23:53 UT on 2016-03-15, 36.3h after the GRB
trigger. They were performed at an average seeing of 1.1" and at an
average airmass of 1.5.
We clearly detect the source reported by Malesani et al. (GCN #19191)
and Butler et al. (GCN #19196).
Based on 90 min of exposure in g'r'i'z' and 96 min in JHK, at a mid-time
of 00:44 UT on 2016-03-16, we derive the following preliminary magnitudes
and upper limits (all in the AB system):
g' = 23.3 +/- 0.1 mag,
r' = 23.1 +/- 0.1 mag,
i' = 22.6 +/- 0.1 mag,
z' = 22.5 +/- 0.1 mag,
J > 22.2 mag,
H > 21.8 mag, and
K > 20.4 mag.
Given detections and upper limits are calibrated against SDSS
as well as 2MASS field stars. No correction for the expected Galactic
foreground extinction corresponding to a reddening of E_(B-V)=0.07 mag in
the direction of the burst (Schlafly & Finkbeiner 2011) has been applied.
Our r'-band magnitude, combined with that of RATIR (Butler et al., GCN #19196)
suggests a very slow fading, possibly indicating that we are close to the
brightness of the host galaxy (Malesani et al. GCN #19191, D'Elia et al., GCN #19192).
GCN Circular 19199
Subject
GRB 160314A: ISON-Ussuriysk optical upper limit, updated photometry and correction of GCN 19184
Date
2016-03-16T06:14:44Z (10 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), E. Chornaya (UAFO), E. Mazaeva (IKI), A. Matkin
(UAFO, ISON), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf
of larger GRB follow-up collaboration:
After receiving full data set of our observations (GCN 19184) we refine
photometry and correct UT time of the observations.
The field of the GRB 160314A (D'Elia et al., GCN 19182) was observed
with SANTEL-650 (0.65m) telescope of UAFO/ISON-Ussuriysk observatory
starting on March, 14 (UT) 11:56:51 under clear sky but with a high
ground wind speed. We obtained series of unfiltered images of 30 s
exposure. In a combined image we do not detect optical afterglow
(D'Elia et al., GCN 19182; Siegel & D'Elia, GCN 19187; Malesani et al.,
GCN 19191). Photometry of combined images is following
Date UT start t-T0 Filter Exp. OT U_limit (3sigma)
(mid, days) (s)
2016-03-14 11:56:51 0.01728 none 3*30 n/d 18.7
2016-03-14 11:56:51 0.04575 none 30*30 n/d 20.1
The photometry is based on nearby SDSS star J073110.29+170129.9
assuming R_Lupton = 16.132.
GCN Circular 19196
Subject
GRB 160314A: RATIR Optical and NIR Observations
Date
2016-03-15T20:32:00Z (10 years ago)
From
Alan M. Watson at Instituto de Astronomia UNAM <alan@astro.unam.mx>
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC),
William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J.
Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara
(GSFC/STScI), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico
Ramirez-Ruiz (UCSC), Jos�� A. de Diego (UNAM), Leonid Georgiev (UNAM),
Jes��s Gonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM), Neil Gehrels (GSFC),
Harvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (ASU), and
Vicki Toy (UMD) report:
We observed the field of GRB 160314A (D'Elia et al., GCN Circ. 19182)
with the Reionization and Transients Infrared Camera (RATIR;
www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio
Astron��mico Nacional on Sierra San Pedro M��rtir from 2016/03 15.13 to
2016/03 15.36 UTC (15.59 to 21.16 hours after the BAT trigger),
obtaining a total of 3.56 hours exposure in the r and i bands and 1.49
hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle (Osborne et al., GCN
Circ. 19185), in comparison with the SDSS DR9 and 2MASS catalogs, we
obtain the following detections and 3-sigma upper limit:
r 22.83 +/- 0.10
i 22.37 +/- 0.06
Z 22.27 +/- 0.15
Y 22.40 +/- 0.21
J 21.93 +/- 0.19
H > 22.38
These magnitudes are in the AB system and are not corrected for Galactic
extinction in the direction of the GRB.
Compared to the NOT observations reported by Malesani et al. (GCN Circ.
19191), we detect fading in r at the 3.7-sigma level between mean epochs
of 9.2 and 18.4 hours after the bursts. This confirms that the NOT
source is the optical counterpart of the GRB.
We thank the staff of the Observatorio Astron��mico Nacional in San Pedro
M��rtir.
GCN Circular 19195
Subject
GRB 160314A: Mondy optical observations
Date
2016-03-15T19:09:27Z (10 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Volnova (IKI), E. Klunko (ISTP), I. Korobtsev
(ISTP), A. Pozanenko (IKI) report on behalf of larger GRB follow-up
collaboration:
We observed the field of the GRB 160314A (D'Elia et al., GCN 19182) with
AZT-33IK telescope of Sayan observatory (Mondy) starting on March, 14 (UT)
16:13:52. The optical counterpart of GRB 160314A (D'Elia et al., GCN 19182;
Siegel & D'Elia, GCN 19187) is clearly visible in a combined image.
Preliminary photometry of the combined image is following
Date UT start t-T0 Filter Exp. OT OT_err
(mid, days) (s)
2016-03-14 16:13:52 0.21784 R 64*60 21.82 0.18
SDSS-DR9_id R(Lupton)
J073110.30+170129.8 16.13
J073114.43+170052.5 17.95
J073119.52+170015.1 17.13
J073110.88+170047.1 19.53
J073104.14+170112.8 19.88
GCN Circular 19192
Subject
GRB 160314A: VLT/X-shooter redshift
Date
2016-03-15T08:59:11Z (10 years ago)
From
Valerio D'Elia at ASDC <delia@asdc.asi.it>
V. D'Elia (INAF-OAR/ASI-ASDC), D. Xu (NAOC/CAS), D. Malesani, J. P. U. Fynbo (DARK/NBI), H. Flores (GEPI/Paris obs), K. Wiersema (U. of Leicester) and D. Watson (DARK/NBI) report on behalf of a larger collaboration:
We observed the afterglow of GRB 160314A (D'Elia et al., GCN 19182) with ESO's Very Large Telescope UT2 equipped with X-shooter.
Our observations started at 00:15:42 UT on 2016 March 15, about 12h 45m after the Swift trigger, and consisted of four spectra of 1200 s each. The X-shooter spectra cover the range between 3000 and 21000 AA, and were obtained at a seeing of around 0.7�.
A preliminary analysis of the spectrum shows several emission features at the position of the optical transient (Siegel and D'Elia, GCN 19187; Malesani et al. GCN 19191), which we interpret as emission lines of Halpha, Hbeta, Hgamma, [O III], [O II], [S III] and [N II] from the host galaxy at redshift 0.726. Weak absorption features due to Fe II levels are marginally detected at the same redshift.
We acknowledge the fast and efficient support provided by Paranal staff. In particular we thank Boris Haeussler, Giovanni Carraro, Jose Velasquez, Willem-Jan de Wit and Henri Boffin for their excellent job. We also thank Jens Hoeijmakers for postponing his visitor programme allowing us to perform this observation.
GCN Circular 19191
Subject
GRB 160314A: NOT afterglow observations
Date
2016-03-14T22:35:45Z (10 years ago)
From
Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst <malesani@dark-cosmology.dk>
D. Malesani (DARK/NBI), A. de Ugarte Postigo (IAA-CSIC and DARK/NBI), T.
Kruehler (MPE Garching), A. Kvammen (Univ. Tromsoe, Norway, and NOT),
report on behalf of a larger collaboration:
We observed the optical counterpart of GRB 160314A (D'Elia et al., GCN
19182; Siegel & D'Elia, GCN 19187) with the Nordic Optical Telescope
(NOT) equipped with the AlFOSC imager. Our observations were carried out
in the r and i bands, and started on 2016 March 14.86 (9.07 hr after the
GRB).
An object at a position consistent with the UVOT object is detected in
both filters. We measure its coordinates to be (J2000; 0.3" uncertainty):
RA = 07:31:09.73
Dec = +16:59:58.7
At a mean epoch of Mar 14.865 UT, we measure for the afterglow r = 22.40
+- 0.06 (AB), calibrated against nearby SDSS stars. We thus confirm the
UVOT object as the afterglow of GRB 160314A.
We note that a faint object is marginally detected at the afterglow
position in the SDSS data, visible after stacking the gri images. This
could be a relatively bright host galaxy for GRB 160314A. A finding
chart is available at the following link:
http://www.astro.ku.dk/~malesani/GRB/160314A/160314A_NOT_SDSS.jpg
GCN Circular 19190
Subject
GRB 160314A: Swift-XRT refined Analysis
Date
2016-03-14T22:31:49Z (10 years ago)
From
Phil Evans at U of Leicester <pae9@leicester.ac.uk>
K.L. Page (U. Leicester), A. D'Ai (INAF-IASFPA), A. Maselli
(INAF-IASFPA), A. Melandri (INAF-OAB), J.A. Kennea (PSU), B. Sbarufatti
(INAF-OAB/PSU), D.N. Burrows (PSU), C. Pagani (U. Leicester), A.P.
Beardmore (U. Leicester) and V. D'Elia report on behalf of the
Swift-XRT team:
We have analysed 7.9 ks of XRT data for GRB 160314A (D'Elia et al. GCN
Circ. 19182), from 77 s to 24.8 ks after the BAT trigger. The data
comprise 6 s in Windowed Timing (WT) mode (taken while Swift was
slewing), with the remainder in Photon Counting (PC) mode. The enhanced
XRT position for this burst was given by Osborne et al. (GCN Circ.
19185).
The light curve can be modelled with a power-law decay with a decay
index of alpha=1.38 (+/-0.11).
A spectrum formed from the PC mode data can be fitted with an absorbed
power-law with a photon spectral index of 2.02 (+0.22, -0.15). The
best-fitting absorption column is 6.7 (+5.2, -0.5) x 10^20 cm^-2,
consistent with the Galactic value of 6.2 x 10^20 cm^-2 (Willingale et
al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux
conversion factor deduced from this spectrum is 3.2 x 10^-11 (3.8 x
10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
Total column: 6.7 (+5.2, -0.5) x 10^20 cm^-2
Galactic foreground: 6.2 x 10^20 cm^-2
Excess significance: <1.6 sigma
Photon index: 2.02 (+0.22, -0.15)
If the light curve continues to decay with a power-law decay index of
1.38, the count rate at T+24 hours will be 1.8 x 10^-4 count s^-1,
corresponding to an observed (unabsorbed) 0.3-10 keV flux of 6.0 x
10^-15 (7.0 x 10^-15) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00679120.
This circular is an official product of the Swift-XRT team.
GCN Circular 19189
Subject
GRB 160314A: Optical observations from OSN
Date
2016-03-14T20:42:32Z (10 years ago)
From
Antonio de Ugarte Postigo at IAA-CSIC <deugarte@iaa.es>
A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), F. Aceituno (IAA-CSIC),
C.C. Thoene (IAA-CSIC), L. Izzo (Uroma1), Z. Cano (U. Iceland) report:
We observed the field of GRB 160314A (D���Elia et al., GCN 19182) with the 1.5 m
Telescope at the Sierra Nevada Observatory, starting at 19:07 UT (7.57 hr after the
burst). Observations were performed under non-optimal conditions, being affected
by passing clouds. In a 5x300s exposure obtained in R-band we do not detect
the optical counterpart candidate (Siegel et al, GCN 19187) down to a 3-sigma
limiting magnitude of R ~ 21.0, as compared to USNO-B1.0 stars.
GCN Circular 19188
Subject
GRB 160314A: Swift-BAT refined analysis
Date
2016-03-14T19:12:30Z (10 years ago)
From
Amy Lien at GSFC <amy.y.lien@nasa.gov>
J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), V. D'Elia (ASDC),
N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC),
C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU),
M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 160314A (trigger #679120)
(D'Elia et al., GCN Circ. 19182). The BAT ground-calculated position is
RA, Dec = 112.766, 17.024 deg which is
RA(J2000) = 07h 31m 03.9s
Dec(J2000) = +17d 01' 24.7"
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 75%.
The mask-weighted light curve shows a single-pulse structure that starts
at ~ T0, peaks at ~ T+1 s, and ends at ~ T+9 s. T90 (15-350 keV)
is 8.73 +- 1.52 sec (estimated error including systematics).
The time-averaged spectrum from T-0.04 to T+9.31 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.53 +- 0.22. The fluence in the 15-150 keV band is 2.8 +- 0.4 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T+1.12 sec in the 15-150 keV band
is 0.9 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence
level.
The results of the batgrbproduct analysis are available at
http://gcn.gsfc.nasa.gov/notices_s/679120/BA/
GCN Circular 19187
Subject
GRB 160314A: Swift/UVOT Detection
Date
2016-03-14T19:04:28Z (10 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@swift.psu.edu>
M. H. Siegel (PSU) and V. D'Elia (ASDC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160314A
151 s after the BAT trigger (D'Elia et al., GCN Circ. 19182).
A source consistent with the XRT position
(Osborne et al. GCN Circ. 19185)
is detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 07:31:09.73 = 112.79053 (deg.)
Dec (J2000) = +16:59:59.1 = 16.99974 (deg.)
with an estimated uncertainty of 0.63 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
v 457 1825 175 >19.6
b 407 1775 175 >19.6
u 151 401 246 19.14 +/- 0.16
w1 506 1726 156 >18.8
m2 481 1849 174 >19.2
w2 432 1801 175 >19.3
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.08 in the direction of the burst
(Schlegel et al. 1998).
GCN Circular 19185
Subject
GRB 160314A: Enhanced Swift-XRT position
Date
2016-03-14T16:43:43Z (10 years ago)
From
Phil Evans at U of Leicester <pae9@leicester.ac.uk>
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester)
report on behalf of the Swift-XRT team.
Using 1542 s of XRT Photon Counting mode data and 2 UVOT
images for GRB 160314A, we find an astrometrically corrected X-ray
position (using the XRT-UVOT alignment and matching UVOT field sources
to the USNO-B1 catalogue): RA, Dec = 112.79093, +16.99938 which is equivalent
to:
RA (J2000): 07h 31m 9.82s
Dec (J2000): +16d 59' 57.8"
with an uncertainty of 3.2 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest
position can be viewed at http://www.swift.ac.uk/xrt_positions. Position
enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans
et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the
Swift-XRT team.
GCN Circular 19184
Subject
GRB 160314A: ISON-Ussuriysk optical upper limit
Date
2016-03-14T14:35:44Z (10 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), E. Chornaya (UAFO), E. Mazaeva (IKI), A. Matkin
(UAFO, ISON), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf
of larger GRB follow-up collaboration:
We observed the field of the GRB 160314A (D'Elia et al., GCN 19182)
with SANTEL-650 (0.65m) telescope of UAFO/ISON-Ussuriysk observatory
starting on March, 14 (UT) 11:32:51. We obtained series of unfiltered
images of 30 s exposure. We do not detect any optical afterglow within
XRT error circle (D'Elia et al., GCN 19182). Photometry of a combined
image of few first frames is following
Date UT start t-T0 Filter Exp. OT U_limit (3sigma)
(mid, days) (s)
2016-03-14 11:32:51 0.01728 none 3*30 n/d 18.7
The photometry is based on nearby SDSS star J073110.29+170129.9
assuming R_Lupton = 16.132.
GCN Circular 19183
Subject
GRB 160314A: Weihai optical upper limit
Date
2016-03-14T13:05:43Z (10 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
D. Xu (NAOC/CAS), Y.-D. Hu (IAA-CSIC), Y. Qing (Geneva Observatory),
Y.-H. Han (NAOC/CAS, HUST), C.-M. Zhang, S.-M. Hu, C. Cao (SDU) report:
We observed the field of GRB 160314A (D'Elia et al., GCN 19182) using
the 1-m telescope located at Weihai, Shandong, China. Observations
started at 11:51:15 UT on 2016-03-14 (i.e., 18.4 min after the burst) in
cloudy weather, and 4x300s R-band frames were obtained.
No optical source is detected within the XRT error circle (D'Elia et
al., GCN 19182), down to a limiting magnitude of m(R)~19.0, calibrated
with the SDSS field.
GCN Circular 19182
Subject
GRB 160314A: Swift detection of a burst
Date
2016-03-14T11:46:45Z (10 years ago)
From
Kim Page at U.of Leicester <klp5@leicester.ac.uk>
V. D'Elia (ASDC), A. A. Breeveld (UCL-MSSL), P.A. Evans (U Leicester),
L. Izzo (URoma1), J. A. Kennea (PSU), A. Y. Lien (GSFC/UMBC),
F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester) and
B. Sbarufatti (INAF-OAB/PSU) report on behalf of the Swift Team:
At 11:32:51 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 160314A (trigger=679120). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 112.781, +17.001 which is
RA(J2000) = 07h 31m 07s
Dec(J2000) = +17d 00' 03"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a multi-peaked
structure with a duration of about 20 sec. The peak count rate
was ~1700 counts/sec (15-350 keV), at ~1 sec after the trigger.
The XRT began observing the field at 11:34:22.7 UT, 91.0 seconds after
the BAT trigger. Using promptly downlinked data we find an uncatalogued
X-ray source with an enhanced position: RA, Dec 112.7891, 16.9987 which
is equivalent to:
RA(J2000) = 07h 31m 09.39s
Dec(J2000) = +16d 59' 55.5"
with an uncertainty of 2.1 arcseconds (radius, 90% containment). This
location is 29 arcseconds from the BAT onboard position, within the BAT
error circle. This position may be improved as more data are received;
the latest position is available at http://www.swift.ac.uk/sper. No
spectrum from the promptly downlinked event data is yet available to
determine the column density.
UVOT took a finding chart exposure of 250 seconds with the U filter starting
151 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the
XRT error circle. The typical 3-sigma upper limit has been about 19.2 mag. The
8'x8' region for the list of sources generated on-board covers 100% of the XRT
error circle. The list of sources is typically complete to about 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.08.
Burst Advocate for this burst is V. D'Elia (delia AT asdc.asi.it).
Please contact the BA by email if you require additional information
regarding Swift followup of this burst. In extremely urgent cases, after
trying the Burst Advocate, you can contact the Swift PI by phone (see
Swift TOO web site for information: http://www.swift.psu.edu/too.html.)