GRB120728B

This page lists all entries on GRB120728B in GRBweb

Summary Fermi GBM GCN 13549 GCN 13552 GCN 13553

Summary table
Variable Value Source
GRB_name_Fermi GRB120728434
T0 10:25:24 UTC GCN_circulars,IPN Triangulation
ra 103.7720° GCN_circulars,IPN Triangulation
decl -45.8930° GCN_circulars,IPN Triangulation
T90 100.481 s Fermi_GBM
T90_error 6.623 s Fermi_GBM
T90_start 10:25:35.244 UTC Fermi_GBM
fluence 1.16e-04 erg/cm² Fermi_GBM
fluence_error 2.54e-06 erg/cm² Fermi_GBM
T100 111.725 s
GBM_located False
mjd 56136.43430555556 GCN_circulars,IPN Triangulation
Fermi GBM table
GRB_name_Fermi GRB120728434
trigger_name bn120728434
ra 103.7721°
decl -45.8931°
pos_error 2.53e+00°
datum 2012-07-28
t_trigger 10:25:24.236 UTC
T90 100.481 s
T90_error 6.623 s
T90_start 10:25:35.244 UTC
fluence 1.16e-04 erg/cm²
fluence_error 2.54e-06 erg/cm²
flux_1024 4.09e+01 erg/cm²/s
flux_1024_error 5.82e-01 erg/cm²/s
flux_1024_time 6.96e+01 erg/cm²/s
flux_64 4.67e+01 erg/cm²/s
flux_64_error 2.51e+00 erg/cm²/s
GCN 13549 table
GRB_name GRB120728B
GCN_number 13549
Detection_method IPN Triangulation
t_trigger 10:25:24 UTC
ra 103.7720°
decl -45.8930°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13549 SUBJECT: IPN Triangulation of GRB 120728B (long/intense) DATE: 12/07/31 10:36:31 GMT FROM: Valentin Pal'shin at Ioffe Inst 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, S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, V. Connaughton, M. Briggs, and C. Meegan, on behalf of the Fermi GBM team, W. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr, on behalf of the GRS-Odyssey GRB team, A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, and D. M. Smith, J. McTiernan, and W. Hajdas, on behalf of the RHESSI team, report: The long-duration, intense GRB 120728B was observed by Konus-Wind, Fermi (GBM: trigger 365163927), INTEGRAL (SPI-ACS), Mars Odyssey (HEND), and RHESSI at about 37524 s UT (10:25:24). We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 103.772 (06h 55m 05s) -45.893 (-45d 53' 36") Corners: 103.695 (06h 54m 47s) -44.477 (-44d 28' 37") 103.463 (06h 53m 51s) -47.210 (-47d 12' 37") 103.857 (06h 55m 26s) -47.308 (-47d 18' 29") 104.069 (06h 56m 17s) -44.576 (-44d 34' 33") --------------------------------------------- The error box area is 0.745 sq. deg, and its maximum dimension is 2.8 deg. This box can be improved. The time history and spectrum will be given in a forthcoming GCN Circular. A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB120728_T37534/IPN/
GCN 13552 table
GRB_name GRB120728B
GCN_number 13552
Detection_method Konus-Wind Det
t_trigger 10:25:34.985 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 13552 SUBJECT: Konus-Wind observation of GRB 120728B DATE: 12/07/31 14:19:25 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 long-duration intense GRB 120728B (IPN detection and localization: Hurley at al., GCN 13549) triggered Konus-Wind at T0=37534.985s UT (10:25:34.985) The light curve shows multiple pulses in at least three main bursting episodes. The total duration of the burst is ~250 s, the emission is seen up to 5 Mev. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB120728_T37534/ As observed by Konus-Wind, the burst had a fluence of 1.20(-0.15,+0.15)x10-4 erg/cm2, and a 64-ms peak flux, measured from T0+57.472 s, of 3.8(-0.4,+0.4)x10-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-integrated spectrum of the main emission episode (measured from T0 to T0+192.256 s) is best fit in the 20 keV - 5 MeV range by the GRB (Band) function with the following model parameters: the low-energy photon index alpha = -1.3 (-0.1, +0.1), the high energy photon index beta = -2.9 (-1.0, +0.3), the peak energy Ep = 77(-5, +4) keV, chi2 = 86.9/75 dof. The spectrum at the maximum count rate (measured from T0+55.552 to T0+64.256 s) is best fitted is best fit in the 20 keV - 2 MeV range by a power law with exponential cutoff model, for which: alpha = -1.0 (-0.1, +0.1), and Ep = 95(-4, +4) keV, chi2 = 67.8/57 dof. All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.
GCN 13553 table
GRB_name GRB120728B
GCN_number 13553
Detection_method Fermi GBM Det
t_trigger 10:25:24.240 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 13553 SUBJECT: GRB 120728B: Fermi GBM detection DATE: 12/07/31 20:59:26 GMT FROM: Suzanne Foley at MPE S. Foley (UCD/MPE) reports on behalf of the Fermi GBM Team: "At 10:25:24.24 UT on 28 July 2012, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 120728B (trigger 365163927 / 120728434) which was also detected by Konus-Wind (Golenetskii et al., GCN 13552). This burst was localized by the IPN (Hurley et al., GCN 13549). The GBM on-ground calculated location is consistent with the IPN location. The angle from the Fermi LAT boresight is 117 degrees. Moreover, this burst was bright enough to result in a Fermi spacecraft autonomous repoint request (ARR) maneuver. The GBM light curve consists of multiple pulses with a duration (T90) of about 105 s (50-300 keV). The time-averaged spectrum from T0+8.7 s to T0+113.2 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -1.31 +/-0.01 and the cutoff energy, parameterized as Epeak, is 94.86 (+1.04/-1.01) keV. The event fluence (10-1000 keV) in this time interval is (1.27 +/- 0.02)E-4 erg/cm^2. The 1-sec peak photon flux measured starting from T0+69.6 s in the 10-1000 keV band is 42.8 +/- 0.6 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."