GRB120402B

This page lists all entries on GRB120402B in GRBweb

Summary Fermi GBM GCN 13194 GCN 13216

Summary table
Variable Value Source
GRB_name_Fermi GRB120402669
T0 16:03:58.678 UTC Fermi_GBM
ra 223.7000° GCN_circulars,Optical
decl -10.4000° GCN_circulars,Optical
T90 20.224 s Fermi_GBM
T90_error 0.81 s Fermi_GBM
T90_start 16:03:58.678 UTC Fermi_GBM
fluence 3.75e-06 erg/cm² Fermi_GBM
fluence_error 2.61e-08 erg/cm² Fermi_GBM
T100 20.224 s
GBM_located False
mjd 56019.66942914352 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB120402669
trigger_name bn120402669
ra 223.7300°
decl -10.4000°
pos_error 4.22e+00°
datum 2012-04-02
t_trigger 16:04:00.758 UTC
T90 20.224 s
T90_error 0.81 s
T90_start 16:03:58.678 UTC
fluence 3.75e-06 erg/cm²
fluence_error 2.61e-08 erg/cm²
flux_1024 1.68e+01 erg/cm²/s
flux_1024_error 4.74e-01 erg/cm²/s
flux_1024_time 3.52e-01 erg/cm²/s
flux_64 2.02e+01 erg/cm²/s
flux_64_error 2.13e+00 erg/cm²/s
GCN 13194 table
GRB_name GRB120402B
GCN_number 13194
Detection_method Fermi GBM Det
t_trigger 16:04:00.760 UTC
ra 223.7000°
decl -10.4000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13194 SUBJECT: GRB 120402B: Fermi GBM detection DATE: 12/04/03 14:30:16 GMT FROM: Andrew Collazzi at NASA/MSFC/ORAU Andrew C. Collazzi (NASA/ORAU) reports on behalf of the Fermi GBM Team: "At 16:04:00.76 UT on 02 April 2012, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 120402B (trigger 355075442 / 120402.669). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 223.7, Dec = -10.4 (J2000 degrees, equivalent to J2000 14h 55m, -10 24'), with a statistical uncertainty of 2.6 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 106 degrees. The GBM light curve shows a soft, bright, main pulse with some small sustained emission with a duration (T90) of about 17.5 s (50-300 keV). The time-averaged spectrum from T0-7.46 to T0+20.192 s is equally well fit by Comptonized Power Law and a Band function. For the CPL function, the best fit parameters are alpha = -1.35 +/- 0.11 and Epeak = 37.2 +/- 2.2. The fluence (10-1000 keV) in this time interval is (3.4 +/- 0.12)E-06 erg/cm^2. For the Band function, the best fit parameters are alpha = -0.48 +/- 0.37, Epeak = 27.5 +/- 2.45, and beta = -2.44 +/- 0.09. The fluence (10-1000 keV) in this time interval is (4.2 +/- 0.22)E-06 erg/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN 13216 table
GRB_name GRB120402B
GCN_number 13216
Detection_method Optical
ra 223.7000°
decl -10.4000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 13216 SUBJECT: GRB 120402B: MASTER early OT limit DATE: 12/04/04 16:56:24 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov, A.Kuznetsov, A.Sankovich Sternberg Astronomical Institute, Moscow State University V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalozhnich, A. Popov Ural State University, Kourovka Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA) MASTER robotic Very Wide Field Cameras (MASTER: http://observ.pereplet.ru) located in Tunka was pointed to the FERMI GRB 120402B (Collazzi, GCN 13194) 64 sec after GRB time at 2012-04-02 16:05:04.583 UT. On our first (10s exposure) set we haven't found optical transient within FERMI error-box (RA = 223.7, Dec = -10.4, Rad=9 degrees (3 sigma + 3 deg. of systematic error ) . The MASTER VWF cameras cover full 1 sigma (+ 3 deg. sys. error) error box and ~ 95% 3 sigma (+ 3 deg. sys. error) error box. The unfiltered upper limit is 12.0 mag. The message may be cited.