GRB 111103A
GCN Circular 12518
Subject
GRB 111103A: Swift detection of a burst
Date
2011-11-03T10:54:18Z (14 years ago)
From
David Palmer at LANL <palmer@lanl.gov>
M. C. Stroh (PSU), W. H. Baumgartner (GSFC/UMBC),
S. Campana (INAF-OAB), P. A. Evans (U Leicester),
E. A. Hoversten (PSU), V. Mangano (INAF-IASFPA),
A. Melandri (INAF-OAB), P. T. O'Brien (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL),
B. Sbarufatti (INAF-OAB/IASFPA) and M. Stamatikos (OSU/NASA/GSFC)
report on behalf of the Swift Team:
At 10:35:13 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 111103A (trigger=506902).
The BAT on-board calculated location is
RA, Dec 327.122, -10.547 which is
RA(J2000) = 21h 48m 29s
Dec(J2000) = -10d 32' 49"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a multiple-peaked
structure with a duration of about 20 sec. The peak count rate
was ~4800 counts/sec (15-350 keV), at ~0 sec after the trigger.
Due to a Moon observing constraint, Swift cannot slew to the BAT
position until 20:12 UT on 2011 November 05. There will thus be no XRT
or UVOT data for this trigger before this time.
Burst Advocate for this burst is M. C. Stroh (stroh AT astroh.org).
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.)
GCN Circular 12523
Subject
GRB 111103A: Swift-BAT refined analysis
Date
2011-11-03T15:18:22Z (14 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@lheamail.gsfc.nasa.gov>
T. Sakamoto (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),
C. B. Markwardt (GSFC), D. M. Palmer (LANL), M. Stamatikos (OSU),
M. C. Stroh (PSU), J. Tueller (GSFC), T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):
Using the data set from T-239 to T+358 sec from recent telemetry downlinks,
we report further analysis of BAT GRB 111103A (trigger #506902)
(Stroh, et al., GCN Circ. 12518). The BAT ground-calculated position is
RA, Dec = 327.111, -10.532 deg, which is
RA(J2000) = 21h 48m 26.7s
Dec(J2000) = -10d 31' 54.3"
with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 31%.
The mask-weighted light curve shows 4 almost overlapping peaks with the
first starting at ~T-0.5 sec, peaks at T+1, +4, +6, and +12 sec,
and the last peak ending at ~T+20 sec. T90 (15-350 keV) is 11.6 +- 0.5 sec
(estimated error including systematics).
The time-averaged spectrum from T-0.42 to T+12.14 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.30 +- 0.10. The fluence in the 15-150 keV band is 1.4 +- 0.1 x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T+6.04 sec in the 15-150 keV band
is 3.1 +- 0.3 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/506902/BA/
GCN Circular 12529
Subject
GRB 111103A: Fermi GBM observation
Date
2011-11-03T21:56:48Z (14 years ago)
From
David Tierney at UCD <david.tierney@ucd.ie>
D. Tierney (UCD)
reports on behalf of the Fermi GBM Team:
At 10:35:13.39 UT on 03 November 2011, the Fermi Gamma-Ray Burst Monitor
triggered and observed GRB 111103A (trigger 342009315/111103441),
which was detected by the Swift/BAT (Stroh et al. 2011, GCN 12518).
The GBM on-ground location is consistent with the Swift position.
The GBM light curve consists of multiple peaks
with a duration (T90) of 11.78 +/- 1.18 s (50-300 keV).
The time-averaged spectrum from T0 s to T0+13.7 s is
best fit by a power law function with an exponential
high-energy cutoff. The power law index is -0.43 (+0.16/-0.15) and
the cutoff energy, parameterized as Epeak, is 152.2 (+16.1/-12.8) keV.
The event fluence (10-1000 keV) in this time interval is
(3.20 +/- 0.19)E-06 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+0.13 s in the 10-1000 keV band is 5.2 +/- 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog.
GCN Circular 12706
Subject
GRB 111103A: optical upper limit of Mt. Terskol observatory
Date
2011-12-20T12:42:29Z (13 years ago)
From
Alina Volnova at SAI MSU <alinusss@gmail.com>
A.Volnova (SAI MSU), M. Andreev, A. Sergeev (Terskol Branch of INASAN), V.
Petkov (Baksan Neutrino Observatory of INR), N. Karpov, O. Andrienko, K.
Martynyuk-Lototsky, N. Parakhin, N. Borachok, V. Kozlov, G. Butenko, V.
Godunova (IC AMER, NASU), A. Pozanenko (IKI) report:
We observed field of the Swift GRB 111103A (Stroh et al. GCN 12518) with
Zeiss-600 telescope of Mt.Terskol observatory in R filter between Nov. 3
(UT) 16:16:02 - 16:49:00. We took 60 frames with exposure of 30
seconds under favourable weather conditions and seeing (FWHM) of about
1.5''. We do not detect any source on a stacked frame within BAT
ground-calculated error circle (Sakamoto et al., GCN 12523). A
photometry is based on the USNO B1.0 nearby stars.
T0+ Filter, Exposure, OT, UpperLimit
(mid, d) (s)
0.24836 R 60x30 n/d 16.6