GRB231203A

This page lists all entries on GRB231203A in GRBweb

Summary Fermi GBM GCN 35252 GCN 35257

Summary table
Variable Value Source
GRB_name_Fermi GRB231203293
T0 7:01:30 UTC GCN_circulars,Fermi GBM final loc
ra 239.6800° Fermi_GBM
decl -49.7700° Fermi_GBM
pos_error 4.51e+00° Fermi_GBM
T90 37.12 s Fermi_GBM
T90_error 2.064 s Fermi_GBM
T90_start 7:01:31.028 UTC Fermi_GBM
fluence 5.50e-06 erg/cm² Fermi_GBM
fluence_error 5.61e-08 erg/cm² Fermi_GBM
T100 38.148 s
GBM_located True
mjd 60281.292708333334 GCN_circulars,Fermi GBM final loc
Fermi GBM table
GRB_name_Fermi GRB231203293
trigger_name bn231203293
ra 239.6800°
decl -49.7700°
pos_error 4.51e+00°
datum 2023-12-03
t_trigger 7:01:30.772 UTC
T90 37.12 s
T90_error 2.064 s
T90_start 7:01:31.028 UTC
fluence 5.50e-06 erg/cm²
fluence_error 5.61e-08 erg/cm²
flux_1024 4.46e+00 erg/cm²/s
flux_1024_error 1.92e-01 erg/cm²/s
flux_1024_time 4.48e-01 erg/cm²/s
flux_64 6.17e+00 erg/cm²/s
flux_64_error 8.09e-01 erg/cm²/s
GCN 35252 table
GRB_name GRB231203A
GCN_number 35252
Detection_method Fermi GBM final loc
t_trigger 7:01:30 UTC
ra 239.7000°
decl -49.8000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 35252 SUBJECT: GRB 231203A: Fermi GBM Final Real-time Localization DATE: 23/12/03 07:11:59 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 07:01:30 UT on 3 Dec 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231203A (trigger 723279695.772024 / 231203293). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 239.7, Dec = -49.8 (J2000 degrees, equivalent to J2000 15h 58m, -49d 47'), with a statistical uncertainty of 7.1 degrees. The angle from the Fermi LAT boresight is 59.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231203293/quicklook/glg_skymap_all_bn231203293.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/bn231203293/quicklook/glg_healpix_all_bn231203293.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231203293/quicklook/glg_lc_medres34_bn231203293.gif
GCN 35257 table
GRB_name GRB231203A
GCN_number 35257
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 35257 SUBJECT: GRB 231203A: Swift/BAT-GUANO detection of a burst outside the coded FOV DATE: 23/12/04 16:20:25 GMT FROM: Jimmy DeLaunay at Penn State James DeLaunay (PSU), Samuele Ronchini (PSU), Gayathri Raman (PSU), Aaron Tohuvavohu (U Toronto), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC) report: Swift/BAT did not localize GRB 231203A onboard (T0: 2023-12-03T07:01:30.77 UTC, Fermi trig 723279723) The Fermi notice, distributed in near real-time, triggered the Swift Mission Operations Center operated Gamma-ray Urgent Archiver for Novel Opportunities (GUANO; Tohuvavohu et al. 2020, ApJ, 900, 1). Upon trigger by this notice, GUANO sent a command to the Swift Burst Alert Telescope (BAT) to save 200 seconds of BAT event-mode data from [-50,+150] seconds around the time of the burst. All the requested event mode data was delivered to the ground. The BAT likelihood search, NITRATES (DeLaunay + Tohuvavohu 2022, ApJ, 941, 169), performed on the temporal window [T0-20 s, T0+20 s], detects the burst with a sqrt(TS) of 13.6 in a 2.048 s analysis time bin, starting at T0. NITRATES results are consistent with a burst coming from outside the FOV, with DeltaLLHOut of 2.64. See Section 9.1 and Figures 10 and 17 in the NITRATES paper for brief descriptions and interpretation of sqrt(TS), DeltaLLHPeak, and DeltaLLHOut. GUANO is a fully autonomous, extremely low latency, spacecraft commanding pipeline designed for targeted recovery of BAT event mode data around the times of compelling astrophysical events to enable more sensitive GRB searches. A live reporting of Swift/BAT event data recovered by GUANO can be found at: https://www.swift.psu.edu/guano/