GRB121127A

This page lists all entries on GRB121127A in GRBweb

Summary Fermi GBM IPN GCN 14021 GCN 14022 GCN 14044

Summary table
Variable Value Source
GRB_name_Fermi GRB121127914
T0 21:55:57.290 UTC GCN_circulars,Konus-Wind Det
ra 176.4375° IPN
decl -52.4167° IPN
pos_error 4.83e-01° IPN
T90 0.64 s Fermi_GBM
T90_error 0.405 s Fermi_GBM
T90_start 21:56:00.254 UTC Fermi_GBM
fluence 1.58e-06 erg/cm² Fermi_GBM
fluence_error 4.98e-08 erg/cm² Fermi_GBM
T100 3.604 s
GBM_located False
mjd 56258.91385752315 GCN_circulars,Konus-Wind Det
Fermi GBM table
GRB_name_Fermi GRB121127914
trigger_name bn121127914
ra 176.4379°
decl -52.4139°
pos_error 4.30e+00°
datum 2012-11-27
t_trigger 21:56:00.318 UTC
T90 0.64 s
T90_error 0.405 s
T90_start 21:56:00.254 UTC
fluence 1.58e-06 erg/cm²
fluence_error 4.98e-08 erg/cm²
flux_1024 4.63e+00 erg/cm²/s
flux_1024_error 3.04e-01 erg/cm²/s
flux_1024_time -2.56e-01 erg/cm²/s
flux_64 2.04e+01 erg/cm²/s
flux_64_error 1.66e+00 erg/cm²/s
IPN table
GRB_name GRB121127A
ra 176.4375°
decl -52.4167°
pos_error 4.83e-01°
GCN 14021 table
GRB_name GRB121127A
GCN_number 14021
Detection_method IPN Triangulation
t_trigger 21:56:00 UTC
ra 176.4380°
decl -52.4140°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14021 SUBJECT: IPN Triangulation of GRB 121127A (short/hard) DATE: 12/11/29 22:05:59 GMT FROM: Valentin Pal'shin at Ioffe Inst S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, K. Hurley on behalf of the Mars Odyssey and MESSENGER GRB teams, I. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin, on behalf of the HEND-Odyssey GRB team, J. Goldsten, on behalf of the MESSENGER GRNS GRB team, V. Connaughton, M. Briggs, C. Meegan, and V. Pelassa, on behalf of the Fermi GBM team, A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, S. Barthelmy, J. Cummings, N. Gehrels, H. Krimm, and D. Palmer, on behalf of the Swift-BAT team, and K. Yamaoka, M. Ohno, Y. Hanabata, Y. Fukazawa, T. Takahashi, M. Tashiro, Y. Terada, T. Murakami, and K. Makishima, on behalf of the Suzaku WAM team, report: A short-duration, hard spectrum GRB 121127A was observed by Konus-Wind, Fermi (GBM: trigger 375746163), INTEGRAL (SPI-ACS), MESSENGER (GRNS), Swift (BAT), Mars Odyssey (HEND), and Suzaku (WAM) at about 78960 s UT (21:56:00). We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 176.438 (11h 45m 45s) -52.414 (-52d 24' 52") Corners: 176.369 (11h 45m 29s) -52.649 (-52d 38' 58") 176.255 (11h 45m 01s) -52.512 (-52d 30' 44") 176.507 (11h 46m 02s) -52.179 (-52d 10' 45") 176.620 (11h 46m 29s) -52.316 (-52d 18' 59") --------------------------------------------- The error box area is 158 sq. arcmin, and its maximum dimension is 29 arcmin (the minimum one is 9 arcmin; the minimum annulus width is 3.6 arcmin). This box can be improved. The time history and spectrum will be given in a forthcoming GCN Circular.
GCN 14022 table
GRB_name GRB121127A
GCN_number 14022
Detection_method Konus-Wind Det
t_trigger 21:55:57.290 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 14022 SUBJECT: Konus-Wind observation of GRB 121127A DATE: 12/11/30 07:37:36 GMT FROM: Dmitry Frederiks at Ioffe Institute S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, report: The short-duration hard-spectrum GRB 121127A (IPN localization: Golenetskii at al., GCN 14021) triggered Konus-Wind at T0=78957.290s UT (21:55:57.290) The light curve shows a single pulse with a duration of ~0.25 s. The emission is seen up to ~6 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB121127_T78957/ As observed by Konus-Wind the burst had a fluence of (3.8 0.8)x10-6 erg/cm2, and a 16-ms peak flux, measured from T0+0.016 s, of (2.6 0.6)x10-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The spectrum of the burst (measured T0 to T0+0.192 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) function with the following model parameters: the low-energy photon index alpha = 0.0 0.3, the high energy photon index beta = -2.0 0.3, the peak energy Ep = 600 170 keV, chi2 = 11/19 dof. All the quoted results are preliminary.
GCN 14044 table
GRB_name GRB121127A
GCN_number 14044
Detection_method Suzaku WAM Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 14044 SUBJECT: GRB 121127A: Suzaku WAM observation of the prompt emission DATE: 12/12/06 08:05:47 GMT FROM: Makoto Tashiro at Saitama U/Swift Y.Ishida, M. Tashiro, Y. Terada, W. Iwakiri, T. Yasuda, K. Takahara,　M. Asahina, S. Kobayashi, A. Sakamoto, H. Ueno, S. Sugimoto (Saitama　U.), M. Akiyama, N. Ohmori, E. Mochinaga, M. Yamauchi (Univ. of　Miyazaki), K. Yamaoka, M. Kokubun, T. Takahashi (ISAS/JAXA), Y.　Hanabata, T. Kawano, K. Takaki, R. Nakamura, Y.Tanaka, M. Ohno, Y.　Fukazawa (Hiroshima U.), S. Sugita (Nagoya U.), Y. E. Nakagawa (Waseda　U.), Y. Urata, P. Tsai (NCU), K. Nakazawa, K. Makishima (Univ. of　Tokyo), on behalf of the Suzaku WAM team, report: The short, IPN localized GRB 121127A (Golenetskii et al., GCN 14021) was detected by the the Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at 21:56:01 UT (=T0). The observed light curve shows a single peak starting at T0-1s, ending at T0s with a duration (T90) of about 1 seconds. The fluence in 100 - 1000 keV was 9.34(+0.73/-2.40) x 10^-7 erg/cm^2. The 1-s peak flux measured from T0-1s was 1.78(+0.16/-0.47) photons/cm^2/s in the same energy range. Preliminary result shows that the time-averaged spectrum from T0-1s to T0s is well fitted by a power-law with exponential cutoff model : dN/dE ~ E^{-alpha} * exp(-(2-alpha)*E/Epeak) with alpha 0.55(+0.57/-0.80), and Epeak 759(+273/-166) keV (chi^2/d.o.f. = 32.6/29). All the quoted errors are at statistical 90% confidence level, in which the systematic uncertainties are not included. The light curves with 1-sec time resolution for this burst will be appeared at: http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/untrig/grb_table.html