GRB090112B

This page lists all entries on GRB090112B in GRBweb

Summary Fermi GBM GCN 8805 GCN 8815

Summary table
Variable Value Source
GRB_name_Fermi GRB090112729
T0 17:30:14.686 UTC Fermi_GBM
ra 192.3000° Fermi_GBM
decl 25.4000° Fermi_GBM
pos_error 2.71e+00° Fermi_GBM
T90 14.08 s Fermi_GBM
T90_error 5.126 s Fermi_GBM
T90_start 17:30:14.686 UTC Fermi_GBM
fluence 9.23e-06 erg/cm² Fermi_GBM
fluence_error 1.08e-07 erg/cm² Fermi_GBM
T100 14.08 s
GBM_located True
mjd 54843.72933664352 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB090112729
trigger_name bn090112729
ra 192.3000°
decl 25.4000°
pos_error 2.71e+00°
datum 2009-01-12
t_trigger 17:30:15.454 UTC
T90 14.08 s
T90_error 5.126 s
T90_start 17:30:14.686 UTC
fluence 9.23e-06 erg/cm²
fluence_error 1.08e-07 erg/cm²
flux_1024 1.33e+01 erg/cm²/s
flux_1024_error 3.00e-01 erg/cm²/s
flux_1024_time 2.05e+00 erg/cm²/s
flux_64 1.81e+01 erg/cm²/s
flux_64_error 1.32e+00 erg/cm²/s
GCN 8805 table
GRB_name GRB090112B
GCN_number 8805
Detection_method Fermi GBM Det
t_trigger 17:30:15.450 UTC
ra 192.7000°
decl 22.2000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 8805 SUBJECT: GRB 090112B: Fermi GBM Detection DATE: 09/01/13 22:21:26 GMT FROM: Alexander van der Horst at NASA/MSFC A.J. van der Horst (NASA/MSFC/ORAU) reports on behalf of the Fermi GBM Team: "At 17:30:15.45 UT on 12 January 2009, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 090112B (trigger 253474217 / 090112.729). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 192.7, Dec = +22.2 (J2000 degrees, equivalent to J2000 12h51m, +22d12'), with a statistical uncertainty of 2.1 degrees (radius, 1-sigma containment, statistical only; there is additionally a systematic error which is currently estimated to be 2 to 3 degrees). The angle from the Fermi LAT boresight is 95 degrees. The GBM light curve shows one pulse with some substructure, with a duration (T90) of about 12 s (50-300 keV). The time-averaged spectrum from T0 to T0+8.70 s is best fit by a Band function with Epeak = 139 +/- 9 keV, alpha = -0.75 +/- 0.06 and beta = -2.43 +/- 0.14. The fluence (8-1000 keV) in this time interval is (5.4 +/- 0.3)E-6 erg/cm^2. The 1-sec peak photon flux measured starting from T0+2.6s in the 8-1000 keV band is 14 +/- 1 ph/s/cm^2. The spectral and temporal analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN 8815 table
GRB_name GRB090112B
GCN_number 8815
Detection_method Suzaku WAM Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 8815 SUBJECT: GRB 090112B: Suzaku WAM observation of the prompt emission DATE: 09/01/16 10:21:36 GMT FROM: Kazutaka Yamaoka at Aoyama Gakuin U M. Suzuki, M. Ohno, M. Kokubun, T. Takahashi (ISAS/JAXA), Y. E. Nakagawa, T. Tamagawa (RIKEN), H. Hayashi, E. Sonoda, M. Yamauchi, H. Tanaka, R. Hara, N. Ohmori, K. Kono (Univ. of Miyazaki), A. Endo, M. Tashiro, Y. Terada, Y. Urata, K. Onda, N. Kodaka, K. Morigami, T. Sugasahara, W. Iwakiri (Saitama U.), T. Enoto, K. Nakazawa, K. Makishima (Univ. of Tokyo), S. Sugita, K. Yamaoka (Aoyama Gakuin U.), Y. Hanabata, T. Uehara, T. Takahashi, Y. Fukazawa, C. Kira (Hiroshima U.), S. Hong (Nihon U.), on behalf of the Suzaku WAM team, report: The long GRB 090112B (van der Horst et al., GCN 8805) triggered the Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at 2009-01-12 17:30:14 UT (=T0). The observed light curve shows multiple peaks and lasting from T0-1 s to T0+12 s with a duration (T90) of about 8 seconds. The fluence in 100 - 1000 keV was (5.2 +/- 0.3) x 10^-6 erg/cm^2. The 1-s peak flux measured from T0+3 s was 3.5 (+0.2/-0.3) photons/cm^2/s in the same energy range. Preliminary result shows that the time-averaged spectrum from T0-1 s to T0+12 s is well fitted by a single power-law with a photon index of 2.46 +/- 0.14 (chi^2/d.o.f = 18/22). 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