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This page lists all entries on GRB091112A in GRBweb

Summary Fermi GBM IPN Swift GCN 10162 GCN 10164 GCN 10165 GCN 10170

Summary table
Variable	Value	Source
GRB_name_Fermi	GRB091112737
T0	17:41:15.054 UTC	Fermi_GBM
ra	257.7510°	Swift
decl	-36.7290°	Swift
pos_error	1.16e-02°	Swift
T90	24.576 s	Fermi_GBM
T90_error	0.923 s	Fermi_GBM
T90_start	17:41:15.054 UTC	Fermi_GBM
fluence	9.90e-06 erg/cm²	Fermi_GBM
fluence_error	8.86e-08 erg/cm²	Fermi_GBM
T100	24.576 s
GBM_located	False
mjd	55147.73697979167	Fermi_GBM

Fermi GBM table
GRB_name_Fermi	GRB091112737
trigger_name	bn091112737
ra	257.7279°
decl	-36.7150°
pos_error	3.33e+00°
datum	2009-11-12
t_trigger	17:41:15.822 UTC
T90	24.576 s
T90_error	0.923 s
T90_start	17:41:15.054 UTC
fluence	9.90e-06 erg/cm²
fluence_error	8.86e-08 erg/cm²
flux_1024	4.17e+00 erg/cm²/s
flux_1024_error	1.93e-01 erg/cm²/s
flux_1024_time	8.26e+00 erg/cm²/s
flux_64	5.74e+00 erg/cm²/s
flux_64_error	8.57e-01 erg/cm²/s

IPN table
GRB_name	GRB091112A
ra	257.7500°
decl	-36.7333°
pos_error	5.00e-02°

Swift table
GRB_name	GRB091112A
t_trigger	17:41:21 UTC
ra	257.7510°
decl	-36.7290°
pos_error	1.16e-02°
T90	17.0 s
fluence	2.10e-06 erg/cm²

GCN 10162 table
GRB_name	GRB091112A
GCN_number	10162
Detection_method	Swift Det
t_trigger	17:41:21 UTC
ra	257.7280°
decl	-36.7150°
Circular_text	TITLE: GCN CIRCULAR NUMBER: 10162 SUBJECT: GRB 091112: Swift detection of a possible burst DATE: 09/11/12 17:57:24 GMT FROM: David Palmer at LANL V. Mangano (INAF-IASFPA), W. H. Baumgartner (GSFC/UMBC), S. Campana (INAF-OAB), P.A. Curran (MSSL-UCL), C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), J. Mao (INAF-OAB), R. Margutti (Univ Bicocca&OAB), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), M. H. Siegel (PSU), M. Stamatikos (OSU/NASA/GSFC), M. A. Stark (PSU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 17:41:21 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 091112 (trigger=375659). Swift could not slew to the burst due to the Sun constraint. The BAT on-board calculated location is RA, Dec 257.728, -36.715 which is RA(J2000) = 17h 10m 55s Dec(J2000) = -36d 42' 53" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a symmetrical peak structure with a duration of about 20 sec. The peak count rate was ~2000 counts/sec (15-350 keV), at ~5 sec after the trigger. Due to an observing constraint, Swift cannot slew to the BAT position. There will thus be no XRT or UVOT data for this trigger. Because this location is about 10 degrees from the Galactic center, we cannot rule out the possibility of this being a Galactic source. However, there are no known Galactic sources at this location. Burst Advocate for this burst is V. Mangano (vanessa AT ifc.inaf.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.)

GCN 10164 table
GRB_name	GRB091112A
GCN_number	10164
Detection_method	Fermi GBM Det
t_trigger	17:41:15.820 UTC
Circular_text	TITLE: GCN CIRCULAR NUMBER: 10164 SUBJECT: GRB 091112: Fermi GBM observation DATE: 09/11/13 00:30:38 GMT FROM: Michael S. Briggs at UAH and MSFC M. S. Briggs (UAH) reports on behalf of the Fermi GBM Team: "At 17:41:15.82 UT on 12 Nov 2009, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 091112 (trigger 279740477 / 091112.737), which was also detected by the SWIFT-BAT (V. Mangano et al., GCN 10162) The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 82 degrees. The GBM light curve consists primarily of a broad peak, and has a duration of about 40 seconds. The time-averaged spectrum from T0-0.512 s to T0+24.064 s is best fit by a power law function with an exponential high energy cutoff. The power law index is -1.13 +/- 0.04 and the cutoff energy, parameterized as Epeak, is 750 +/- 120 keV. C-Stat = 717 for 483 degrees of freedom. The event fluence (10-1000 keV) in this time interval is (9.7 +/- 0.3)E-6 erg/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."

GCN 10165 table
GRB_name	GRB091112A
GCN_number	10165
Detection_method	Swift-BAT Det
ra	257.7510°
decl	-36.7290°
Circular_text	TITLE: GCN CIRCULAR NUMBER: 10165 SUBJECT: GRB 091112: Swift-BAT refined analysis DATE: 09/11/13 04:20:04 GMT FROM: Scott Barthelmy at NASA/GSFC D. M. Palmer (LANL), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), V. Mangano (INAF-IASFPA), C. B. Markwardt (GSFC/UMD), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team): Using the data set from T-60 to T+483 sec from the recent telemetry downlink, we report further analysis of BAT GRB 091112 (trigger #375659) (Mangano, et al., GCN Circ. 10162). The BAT ground-calculated position is RA, Dec = 257.751, -36.729 deg, which is RA(J2000) = 17h 11m 00.2s Dec(J2000) = -36d 43' 43.4" with an uncertainty of 1.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 40%. The mask-weighted light curve shows a roughly symmetric peak starting at ~T-15 sec, peaking at ~T+2 sec, and ending at ~T+40 sec. T90 (15-350 keV) is 17 +- 4 sec (estimated error including systematics). The time-averaged spectrum from T-10.0 to T+14.7 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.03 +- 0.14. The fluence in the 15-150 keV band is 2.1 +- 0.4 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+0.56 sec in the 15-150 keV band is 1.9 +- 0.5 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/375659/BA/

GCN 10170 table
GRB_name	GRB091112A
GCN_number	10170
Detection_method	Suzaku WAM Det
Circular_text	TITLE: GCN CIRCULAR NUMBER: 10170 SUBJECT: GRB 091112: Suzaku WAM observation of the prompt emission DATE: 09/11/17 10:15:40 GMT FROM: Masanori Ohno at ISAS/JAXA T. Sugasahara, M. Tashiro, Y. Terada, A. Endo, K. Onda, W. Iwakiri (Saitama U.), S. Sugita(Nagoya U.), K. Yamaoka (Aoyama Gakuin U.), M. Ohno, M. Suzuki, M. Kokubun, T. Takahashi (ISAS/JAXA), Y. E. Nakagawa, T. Tamagawa (RIKEN), N. Ohmori, A. Daikyuji, E. Sonoda, K. Kono, H. Hayashi, K. Noda, Y. Nishioka, M. Yamauchi (Univ. of Miyazaki), N. Vasquez (Tokyo Tech.), Y. Urata, H.M Lin (NCU), Y. Hanabata, T. Uehara, T. Takahashi, Y. Fukazawa (Hiroshima U.), T. Enoto, K. Nakazawa, K. Makishima (Univ. of Tokyo), S. Hong (Nihon U.), on behalf of the Suzaku WAM team, report The long GRB 091112 (Swift/BAT trigger #375659 ; Palmer et al., GCN 10165; Fermi/GBM trigger #279740477 ; Briggs et al., GCN 10164) triggered the Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at 2009-11-12 17:41:16.31 UT (=T0). The observed light curve shows a multi-peaked structure starting at T0-4s, ending at T0+16s with a duration (T90) of about 15 seconds. The fluence in 100-1000 keV was 7.85(-2.91,+0.37)x10^-6 erg/cm2. The 1-s peak flux measured from T0+7s was 1.25(-0.89,+0.09) photons/ cm2/s in the same energy range. Preliminary result shows that the time-averaged spectrum from T0-4s to T0+16s is well fitted by a power-law with exponential cutoff model: dN/dE ~ E^{-alpha} * exp(-(2-alpha)*E/Epeak) with alpha 1.19(-0.76,+0.45), and Epeak 628(-192,+607)keV (chi2/d.o.f. = 23.9/24). All the quoted errors are at statistical 90% confidence level, in which the systematic uncertainties are not included. The light curves for this burst are available at: http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/trig/grb_table.html