GRB 051117B
GCN Circular 4281
Subject
GRB 051117B: Swift detection of a burst
Date
2005-11-17T13:59:44Z (20 years ago)
From
Scott Barthelmy at NASA/GSFC <Scott@lheamail.gsfc.nasa.gov>
D. Band (PSU), S. Barthelmy (GSFC), A. Beardmore (U Leicester),
D. Burrows (PSU), J. Cummings (GSFC/NRC), S.T. Holland (GSFC/USRA),
M. Goad (U. Leicester), O. Godet (U. Leicester), N. Gehrels (GSFC),
C. Gronwall (PSU), J. Kennea (PSU), H. Krimm (GSFC/USRA),
J. Osborne (U Leicester), K. Page (U Leicester)
on behalf of the Swift team:
At 13:22:54 UT, Swift-BAT triggered and located GRB 051117B (trigger=164279).
The BAT on-board calculated location is RA,Dec 85.225d,-19.245d
{05h 40m 54s,-19d 14' 41"} (J2000), with an uncertainty of 3 arcmin
(radius, 90% containment, stat+sys). The BAT light curve shows
a multi-peak structure with a total duration of ~25 sec. The peak count
rate was ~800 counts/sec (15-350 keV), at ~2 seconds after the trigger.
The spacecraft slewed immediately and the XRT began observing the GRB at
13:25:09 UT, 135 sec after the BAT trigger. The on-board detection algorithm
did not centroid on a source due to insufficient counts, so no prompt X-ray
position is available. However, the XRT prompt light curve and raw spectrum
look like a faint GRB. More information will be available around 16:30 UT,
after the next Malindi ground-station pass.
UVOT took a finding chart exposure of 200 sec with the V filter
starting 133 sec after the BAT trigger. No afterglow candidate
has been found in the initial data products. The sub-image covers 19%
of the BAT error circle. No afterglow candidate is found in the list
of sources generated on-board, which covers 89% of the BAT error circle.
The list of sources is typically complete to about 17th mag. No correction
has been made for the expected visual extinction of about 0.19 magnitudes.
GCN Circular 4282
Subject
GRB051117B: Swift XRT position
Date
2005-11-17T16:27:04Z (20 years ago)
From
Andy Beardmore at U Leicester <apb@star.le.ac.uk>
A. Beardmore, K. Page, M. Goad (U. Leicester), J Kennea (PSU) report on
behalf of the Swift XRT team:
We have analysed the first orbit of XRT data from GRB051117B (Band et
al, GCN4281). We find a fading, uncatalogued source located at
RA(J2000) = 05h 40m 43.0s
DEC(J2000) = -19d 16' 26.2"
with an estimated uncertainty of 3.9" (90% containment). This includes
the latest XRT boresight correction and is 3.14' from the BAT on-board
position.
GCN Circular 4283
Subject
GRB 051117B: ROTSE-III Optical Limits
Date
2005-11-17T16:55:47Z (20 years ago)
From
Wiphu Rujopakarn at U Michigan/ROTSE <wiphu@umich.edu>
W. Rujopakarn (U Mich), H. Swan (U Mich), B. Schaefer (Louisiana State), F. Yuan
(U Mich), T. Guver (U Istanbul), report on behalf of the ROTSE collaboration:
ROTSE-IIIa, located at Siding Spring Observatory, Australia, responded to GRB
051117B (Swift trigger 164279), producing images beginning 18 s after the GCN
notice time. An automated response took the first image at 13:24:11.0 UT, 75.6
s after the burst, under windy conditions. These observations were affected by
proximity to the full moon yielding shallow limiting magnitudes. We took 10
5-sec, and 140 20-sec exposures. These unfiltered images are calibrated
relative to USNO A2.0 (R).
Comparison to the DSS (second epoch) reveals no new sources within the 3-sigma
error circle, for both single images and coadding into sets of 10. Individual
images have limiting magnitudes ranging from 13.9-16.3; we set the following
specific limits.
start UT end UT t_exp(s) mlim t_start-tGRB(s) Coadd?
--------------------------------------------------------------------
13:24:12.0 13:24:17.0 5 14.2 76.6 N
13:24:12.0 13:27:07.8 175 15.8 76.6 Y
GCN Circular 4284
Subject
GRB 051117B: Optical observations
Date
2005-11-17T17:23:53Z (20 years ago)
From
Derek Fox at PSU <dfox@astro.psu.edu>
D.B. Fox (Penn State) and R.H. McNaught (RSAA/ANU, SSO) report on behalf
of a larger colloboration:
"We have observed the Swift localization region for GRB 051117B (Band
et al., GCN 4281) with the 40-inch telescope at Siding Spring
Observatory, in a series of unfiltered exposures beginning at 14:12 UT
(49 minutes after the burst). A coadded exposure at mean epoch 14:16
UT reveals no source coincident with the XRT position (Beardmore et
al., GCN 4282), nor any new sources within the BAT localization region
by comparison to the DSS. We estimate our limiting magnitude for this
image to be R=18.8 mag by comparison to the USNO-B1.0 catalog R-band
magnitudes of nearby stars."
[GCN_OPS_NOTE(17nov05): per author's request the author list was added.]
GCN Circular 4285
Subject
GRB 051117B: Lulin R and I band observation
Date
2005-11-17T18:18:52Z (20 years ago)
From
Yuji Urata at RIKEN <urata@crab.riken.go.jp>
GRB 051117B: Lulin R and I band observation
Y.T. Chen, K.Y. Huang, W.H. Ip (NCU), Y. Urata(RIKEN), Y. Qiu (BAO),
Y.Q. Lou (THCA) on behalf of EAFON report:
" We started R and I band imaging observation for GRB 051117B (Band et
al., GCN 4281) with Lulin 1-m telescope at 14:11 UT (48 minutes after
the burst). The stacked I-band image made from 9 x 300 s exposure
shows a very faint sources at RA=05:40:43.3 Dec=-19:16:26(edge of
Swift/XRT error region; Beardmore et al. GCN4282). The brightness
calibrated with USNO-B1.0 catalog is about I=20.6. We could not find
this source in stacked R-band image made from 3 x 300 s exposure
brighter than R < 20.8 (SN=3).
Further observation and analysis are in progress."
This message may be cited.
GCN Circular 4286
Subject
GRB 051117B,optical observation
Date
2005-11-17T18:46:58Z (20 years ago)
From
Eri Sonoda at U of Miyazaki/Japan <sonoda@astro.miyazaki-u.ac.jp>
E.Sonoda,S.Maeno,M.Yamauchi
(University of Miyazaki)
"We have observed the field covering the error circle of
GRB 051117B(GCN4281;Swift-BAT Trigger time is 13:22:54 UT)
with the unfiltered CCD camera on the 30-cm telescope
at University of Miyazaki.
The observation was started 14:03:16 on Nov.17.
After co-adding a set of 7 images (14:03:16 - 14:10:31 UT)
of 30 sec exposures, we have compared with the USNO A2.0 catalog.
Preliminary analysis shows there is no new source brighter than
17.6 mag. in the XRT error region is reported by A.Beardmore et
al.(GCN4282)."
GCN Circular 4288
Subject
GRB 051117B: Refined analysis of the Swift-BAT burst
Date
2005-11-17T20:41:10Z (20 years ago)
From
Scott Barthelmy at NASA/GSFC <Scott@lheamail.gsfc.nasa.gov>
A. Parsons (GSFC), L. Barbier (GSFC), S. Barthelmy (GSFC),
J. Cummings (GSFC/NRC), E. Fenimore (LANL), N. Gehrels (GSFC),
D. Hullinger (GSFC/UMD), K. Hurley (Berkeley), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), J. Norris (GSFC), D. Palmer (LANL),
T. Sakamoto (GSFC/NRC), G. Sato (ISAS), J. Tueller (GSFC)
on behalf of the Swift-BAT team:
Using the full data set from the recent telemetry downlink,
we report further analysis of Swift-BAT GRB 051117B (trigger #164279)
(Band, et al., GCN 4281). The ground-analysis position is
RA,Dec 85.187,-19.280 {05h 40m 44.9s,-19d 16' 48.5"} (J2000)
with an uncertainty of 2.5 arcmin (radius, 90%, stat+sys).
T90 is 8 +- 1 sec. The partial coding fraction is 73%.
The lightcurve has a bump of ~10 sec in duration with a peak at T+1 sec.
Fitting a simple power law over the full interval from T-0.3 to T+7.5 sec,
the photon index is 1.7 +/- 0.3 with a fluence of 1.4 +/- 0.3 X 10^-7 erg/cm^2.
The peak flux in a 1-sec wide window starting at T+1.4 sec
is 0.46 +/- 0.15 ph/cm^2/sec. All values are in the 15-150 keV band
at the 90% confidence level.
GCN Circular 4290
Subject
GRB 051117b: NIR observations
Date
2005-11-18T06:55:34Z (20 years ago)
From
Edo Berger at Carnegie Obs <eberger@ociw.edu>
E. Berger (Carnegie Observatories) and A. Scholz (U. of Toronto) report:
"We observed the position of GRB 051117b (GCN 4281) with WIRC on the du
Pont 100-inch telescope at Las Campanas Observatory starting on 2005 Nov
18.10 UT. A total of 30 min were obtained in the Ks band. No sources are
detected within the XRT error circle (GCN 4282) to a 3-sigma limit of
Ks>19.3 mag in comparison to two nearby 2MASS stars. A single extended
source, which is also visible in the DSS, is detected about 0.8" from the
eastern edge of the error circle with Ks=17.9 mag."
GCN Circular 4291
Subject
GRB 051117B: R and I observations of possible host galaxy
Date
2005-11-18T13:19:34Z (20 years ago)
From
Christina Thoene at Niels Bohr Institute,DARK Cosmo Ctr <cthoene@astro.ku.dk>
C. Thoene and C. Feron, P. Jakobsson, B.L. Jensen, J.P.U. Fynbo,
J. Sollerman, H. Pedersen, D. Watson, J. Hjorth (DARK Cosmology Centre,
NBI) report:
We observed the field of GRB 051117B (Band et al. GCN 4281) with DFOSC at
the Danish 1.54m telescope on La Silla from 18 Nov 2005 starting at 02:58
UT. Exposures of 8 x 600s in R and 18 x 600s in Gunn-i were obtained with
a seeing of 1.5".
We detect an extended source lying on the edge of the XRT error circle
(Beardmore et al. GCN 4282) in both bands as found by Chen et al. in R
(GCN 4285). The source is centered at: (RA,Dec)(J2000.0) =
(05:40:43.26,-19:16:26.1). No other sources are detected in or near the
XRT-circle, nor were there any appreciable brightness variations in the
extended source during our observations.
Using preliminary photometric zeropoints we estimate the following
magnitudes for this source: 21.0 in R and 20.4 in Gunn-i and a color
index of R-I=0.6.
We estimate the probability to find a similar galaxy by chance in the
error-circle to be 5% (based on Postman et al. ApJ 506, 33 (1998)). If the
extended source is the host galaxy associated with GRB 051117B, this would
be one of the brightest host galaxies of long-duration Swift GRBs.
A finding chart of the field is available at:
http://www.astro.ku.dk/~brian_j/grb/grb051117.558/
GCN Circular 4293
Subject
GRB 051117B: MARGE Optical Limits
Date
2005-11-18T23:56:16Z (20 years ago)
From
Heather Swan at U.of Michigan/ROTSE <hflewell@umich.edu>
H. Swan (U Mich), W. Rujopakarn (U Mich), and I. Smith (Rice) report
on behalf of the MARGE collaboration:
The AEOS Burst Camera (ABC) on the AEOS telescope, located at the
Maui Space Surveillance System on Haleakala, responded to GRB051117B
(Swift trigger 164279). Images with a low resolution diffraction
grating were taken between 13:40 and 13:54 UT, under scattered cloud
conditions. The first image was taken 14 minutes after the GCN
notice time, and the exposure time was 10 seconds for each image. A
preliminary analysis gives a limiting magnitude of 19.4 at 13:48 UT.
GCN Circular 4303
Subject
GRB051117b: No Swift/UVOT Detection
Date
2005-11-24T15:11:02Z (20 years ago)
From
Tracey Poole at MSSL <tsp@mssl.ucl.ac.uk>
T. S. Poole (UCL-MSSL), S. T. Holland (GSFC), D. Band (GSFC),
P. Boyd (GSFC-UMBC) & J. Nousek (PSU) on behalf of the Swift/UVOT team
report:
The Swift-Ultra-Violet/Optical Telescope (UVOT) began observing the
field of GRB 051117b (BAT Trigger=164279; Band et. al. GCN 4281) at
2005-11-17 13:22:54 UT, 133 seconds after the burst.
No new source is detected within the 4 arcsec radius XRT error circle at
position RA=5h 40m 43s, Dec=-19d 16' 26.2" (Beardmore et. al. GCN 4282)
in any of the UVOT filters down to the following co-added 5 sigma
magnitude upper limits:
Filter T_range (sec) Exp (sec) 5-sigma
V 133-24975 5236 20.53
B 499-1608 199 19.59
U 445-7019 311 19.66
UVW1 391-366901 1099 21.00
UVM2 277-5993 1110 21.08
UVW2 608-1713 2340 23.24
WHITE 553-982 100 19.49
Where T_range is time post-trigger, and T_exp is the exposure time of
the observation. A 6 arcsec aperture was used for all filters.
These values are not corrected for Galactic extinction.
This message may be cited.
GCN Circular 4304
Subject
GRB051117B: Swift XRT refined analysis
Date
2005-11-25T16:39:23Z (20 years ago)
From
Andy Beardmore at U Leicester <apb@star.le.ac.uk>
A.P. Beardmore, K.L. Page (U. Leicester), K. Hurley (Berkeley),
M. Chester (PSU) report on behalf of the Swift XRT team.
We report on further analysis of the XRT observation of GRB051117B.
By fitting the XRT point spread function to 8ks of PC mode data obtained
from the first observation segment, we find the following revised
position:
RA(J2000) = 05:40:43.0
Dec(J2000) = -19:16:26.5
with an uncertainty of 3.4 arcsec (90% containment).
This includes the latest XRT boresight correction.
The XRT 0.2-10keV light curve shows a simple power-law decay with a
slope of 1.75 +/- 0.25 out to T+12.8ks. After this time the source was
no longer detected, with a 3 sigma upper limit to the count rate of
2.7e-4 count/s in an exposure of 85ks.
An absorbed power-law fit to the photon counting mode spectrum from
T+149s to T+12.8ks gave a photon index 1.9 +1.1/-0.6 and a column
density of (0.4 +0.7/-0.2)e22 cm**2. The Galactic column in this
direction is 4.5E+20 cm**2. The unabsorbed 0.2-10keV flux was
1.4e-12 ergs cm**-2 s**-1.
GCN Circular 4308
Subject
GRB051117B: optical observation
Date
2005-11-29T20:04:12Z (20 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
D. Sharapov, M. Ibrahimov (MAO), A.Pozanenko (IKI),V.Rumyantsev (CrAO) on
behalf of larger GRB follow up collaboration report:
We observed the error box of GRB051117b (Band et al., GCN 4281) with 1.5m
telescope of Maidanak Astronomical Observatory. Set of R images were taken
between Oct.17 (UT) 21:31 - 21:54. No source is detected in refined XRT
error box (Beardmore et al., GCN 4304). We do not detect the extended source
mentioned by Chen et al. in GCN 4285.
Preliminary estimation of upper limit against of USNO A2.0 is following:
Mid time, Exposure, Filter, Mag.
(UT) (s)
Nov.17 21:46 1080 R 21.0 (3 sigma UL)
The message may be cited.
GCN Circular 4396
Subject
GRB051117B: optical observation
Date
2005-12-27T16:02:46Z (19 years ago)
From
Daisaku Nogami at Kyoto U <nogami@kwasan.kyoto-u.ac.jp>
D. Nogami, T. Kawamura, J. Kuriyama, K. Sugiyasu, K. Kubota
(Kyoto Univ.), K. Yanagisawa (Okayama Astrophys. Obs.),
S. Kouzuma, H. Yamaoka (Kyushu Univ.), and N. Kawai (Tokyo
Inst. of Tech.) report:
We observed the field of GRB051117B (Band et al., GCN 4281)
with a 50-cm telescope (MITSuME) at the Okayama Astrophysical
Observatory, using a three-color (g', Rc, and Ic) CCD imager.
The observations started at 14:16:22 (UT), about 54 min after
the trigger time, and ended at 16:36:46 (UT). The exposure
time was 60 sec, and we obtained 110 images in each band.
We could not find any afterglow candidate around the error
box of GRB051117B (GCN 4281). The 3-sigma upper limits in
the stacked images of each band are 19.2 mag, 19.2 mag, and
19.5 mag in the g', Rc, and Ic band, respectively. These
magnitudes were calibrated with the catalogs of Tycho (VT),
USNO A2.0 (R), and USNO B1.0 for g', Rc, and Ic, respectively.