//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 12518 SUBJECT: GRB 111103A: Swift detection of a burst DATE: 11/11/03 10:54:18 GMT FROM: David Palmer at LANL 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.) //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 12523 SUBJECT: GRB 111103A: Swift-BAT refined analysis DATE: 11/11/03 15:18:22 GMT FROM: Scott Barthelmy at NASA/GSFC 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/ //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 12529 SUBJECT: GRB 111103A: Fermi GBM observation DATE: 11/11/03 21:56:48 GMT FROM: David Tierney at UCD 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. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 12706 SUBJECT: GRB 111103A: optical upper limit of Mt. Terskol observatory DATE: 11/12/20 12:42:29 GMT FROM: Alina Volnova at SAI MSU 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