GRB230304C

This page lists all entries on GRB230304C in GRBweb

Summary Fermi GBM GCN 33397 GCN 33401

Summary table
Variable Value Source
GRB_name_Fermi GRB230304918
T0 22:01:38.004 UTC Fermi_GBM
ra 280.7400° Fermi_GBM
decl -10.7500° Fermi_GBM
pos_error 4.32e+00° Fermi_GBM
T90 17.152 s Fermi_GBM
T90_error 0.81 s Fermi_GBM
T90_start 22:01:38.004 UTC Fermi_GBM
fluence 1.50e-06 erg/cm² Fermi_GBM
fluence_error 2.52e-08 erg/cm² Fermi_GBM
T100 17.152 s
GBM_located True
mjd 60007.91780097222 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB230304918
trigger_name bn230304918
ra 280.7400°
decl -10.7500°
pos_error 4.32e+00°
datum 2023-03-04
t_trigger 22:01:39.796 UTC
T90 17.152 s
T90_error 0.81 s
T90_start 22:01:38.004 UTC
fluence 1.50e-06 erg/cm²
fluence_error 2.52e-08 erg/cm²
flux_1024 2.53e+00 erg/cm²/s
flux_1024_error 1.86e-01 erg/cm²/s
flux_1024_time 7.68e-01 erg/cm²/s
flux_64 3.76e+00 erg/cm²/s
flux_64_error 7.44e-01 erg/cm²/s
GCN 33397 table
GRB_name GRB230304C
GCN_number 33397
Detection_method Fermi GBM final loc
t_trigger 22:01:39 UTC
ra 280.7000°
decl -10.8000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 33397 SUBJECT: GRB 230304C: Fermi GBM Final Real-time Localization DATE: 23/03/04 22:10:27 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 22:01:39 UT on 4 Mar 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230304C (trigger 699660104.796088 / 230304918). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 280.7, Dec = -10.8 (J2000 degrees, equivalent to J2000 18h 42m, -10d 48'), with a statistical uncertainty of 5.2 degrees. The angle from the Fermi LAT boresight is 63.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230304918/quicklook/glg_skymap_all_bn230304918.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230304918/quicklook/glg_healpix_all_bn230304918.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230304918/quicklook/glg_lc_medres34_bn230304918.gif
GCN 33401 table
GRB_name GRB230304C
GCN_number 33401
Detection_method AstroSat CZTI
Circular_text TITLE: GCN CIRCULAR NUMBER: 33401 SUBJECT: GRB 230304C: AstroSat CZTI detection DATE: 23/03/06 06:43:30 GMT FROM: Gaurav Waratkar at IIT,Bombay P K. Navaneeth (IUCAA), R. Gopalakrishnan (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a GRB 230304C which was also detected by Fermi-GBM (Fermi GBM team, GCN Circ. 33397). The source was clearly detected in the 20-200 keV energy range. The light curve peaks at 2023-03-04 22:01:39.5 UTC. The measured peak count rate associated with the burst is 93 (+42, -15) counts/s above the background in the combined data of three quadrants (out of four), with a total of 410 (+138, -140) counts. The local mean background count rate was 374 (+2, -3) counts/s. Using cumulative rates, we measure a T90 of 9.34 (+2, -4) s. It was also 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, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project.