GRB190326B

This page lists all entries on GRB190326B in GRBweb

Summary Fermi GBM GCN 24010 GCN 24013 GCN 24019 GCN 24042

Summary table
Variable Value Source
GRB_name_Fermi GRB190326314
T0 7:31:38.998 UTC Fermi_GBM
ra 264.2100° Fermi_GBM
decl 68.3200° Fermi_GBM
pos_error 2.56e+00° Fermi_GBM
T90 55.809 s Fermi_GBM
T90_error 0.81 s Fermi_GBM
T90_start 7:31:41.558 UTC Fermi_GBM
fluence 1.45e-05 erg/cm² Fermi_GBM
fluence_error 7.87e-08 erg/cm² Fermi_GBM
T100 58.369 s
GBM_located True
mjd 58568.31364581019 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB190326314
trigger_name bn190326314
ra 264.2100°
decl 68.3200°
pos_error 2.56e+00°
datum 2019-03-26
t_trigger 7:31:38.998 UTC
T90 55.809 s
T90_error 0.81 s
T90_start 7:31:41.558 UTC
fluence 1.45e-05 erg/cm²
fluence_error 7.87e-08 erg/cm²
flux_1024 7.78e+00 erg/cm²/s
flux_1024_error 2.81e-01 erg/cm²/s
flux_1024_time 5.65e+01 erg/cm²/s
flux_64 9.75e+00 erg/cm²/s
flux_64_error 1.12e+00 erg/cm²/s
GCN 24010 table
GRB_name GRB190326B
GCN_number 24010
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 24010 SUBJECT: Fermi Trigger 575278303 / GRB 190326314 / GRB190326B: BALROG localization DATE: 19/03/26 08:33:32 GMT FROM: Jochen Greiner at MPE,Garching B. Biltzinger, F. Kunzweiler, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report: The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger 575278303 at 07:31:39 on 26 March 2019 were automatically fitted for spectrum and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427; Berlato et al. 2019, ApJ 873, 60). The best-fit position (1 sigma statistical errors) is: RA(2000.0) = 261.4+/-9.0 deg Decl.(2000.0) = 66.5+/-2.7 deg We estimate an additional systematic error of 2 deg. The SWIFT BAT detection of a short GRB at 07:35:28.72 UT was most likely a different GRB. Further details are available at: https://grb.mpe.mpg.de/grb/GRB190326314/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB190326314/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB190326314/json
GCN 24013 table
GRB_name GRB190326B
GCN_number 24013
Detection_method Fermi GBM Det
t_trigger 7:31:39 UTC
ra 264.2000°
decl 68.3000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 24013 SUBJECT: GRB 190326B: Fermi GBM detection DATE: 19/03/26 13:54:58 GMT FROM: Andreas von Kienlin at MPE A. von Kienlin (MPE) reports on behalf of the Fermi GBM Team: "At 07:31:39.00 UT on 26 March 2019, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 190326B (trigger 575278303 / 190326314). The on-ground calculated location, using the GBM trigger data, is RA = 264.2, DEC = 68.3 (J2000 degrees, equivalent to 17h 37m, 68d 18'), with an uncertainty of 1.3 degrees (radius, 1-sigma containment, statistical only; there is additionally a systematic error which we have characterized as a core-plus-tail model, with 90% of GRBs having a 3.7 deg error and a small tail suffering a larger than 10 deg systematic error. [Connaughton et al. 2015, ApJS, 216, 32] ). The angle from the Fermi LAT boresight at the GBM trigger time is 21 degrees. The GBM light curve consists of multiple pulses with a duration (T90) of about 56 s (50-300 keV). The time-averaged spectrum from T0-2.048 s to T0+59.393 s is best fit by a Band function with Epeak = 163 +/- 14 keV, alpha = -0.33 +/- 0.10, and beta = -1.93 +/- 0.07 The event fluence (10-1000 keV) in this time interval is (1.78 +/- 0.05)E-05 erg/cm^2. The 1.024-sec peak photon flux measured starting from T0+56.5128 s in the 10-1000 keV band is 7.8 +/- 0.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN 24019 table
GRB_name GRB190326B
GCN_number 24019
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 24019 SUBJECT: GRB 190326B: Insight-HXMT/HE detection DATE: 19/03/27 14:07:43 GMT FROM: Qi Luo at IHEP Q. Luo, C. K. Li, X. B. Li, G. Li, J. Y. Liao, S. L. Xiong, C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, X. F. Lu, A. M. Zhang, Y. F. Zhang, C. L. Zou (IHEP), Y. J. Jin, Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song, M. Wu, Y. P. Xu, S. N. Zhang (IHEP), report on behalf of the Insight-HXMT team: At 2019-03-26T07:31:47.000 (T0), the Insight-HXMT/HE detected GRB 190326B(trigger ID: HEB190326313) in a routine search of the data, which was also triggered by Fermi/GBM(A. von Kienlin et al. ,GCN 24013). The Insight-HXMT/HE light curve mainly consists of multiple pulses with a duration (T90) of 58.45 s measured from T0+0.47 s. The 1-ms peak rate, measured from T0+48.526 s, is 3079 cnts/sec. The total counts from this burst is 28802 counts. URL_LC: http://www.hxmt.org/images/GRB/HEB190326313_lc.jpg All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (record energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside of the telescope. Insight-HXMT is the first Chinese space X-ray telescope, which was fundedjointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about it could be found at: http://www.hxmt.org.
GCN 24042 table
GRB_name GRB190326B
GCN_number 24042
Detection_method AstroSat CZTI
Circular_text TITLE: GCN CIRCULAR NUMBER: 24042 SUBJECT: GRB 190326B: AstroSat CZTI detection DATE: 19/04/02 17:13:12 GMT FROM: Vidushi Sharma at IUCAA V. Sharma, D. Bhattacharya, A. Vibhute and T. Khanam (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data showed the detection of a long bright GRB 190326B, which was also detected by Fermi-GBM (Kienlin A. von et al., GCN # 24013) and Insight-HXMT/HE detection (Luo Q. et al., GCN # 24019). The source was clearly detected in the 40-200 keV energy range. The light curve shows multiple pulses of emission with strongest peak at 07:32:36.5 UT. The measured peak count rate associated with the burst is 418 cts/s above the background in the combined data of four quadrants, with a total of 4932 cts. The local mean background count rate was 630 cts/s. Using cumulative rates, we measure a T90 of 54.3 s. It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.