GRB230523A

This page lists all entries on GRB230523A in GRBweb

Summary Fermi GBM GCN 33856 GCN 33859

Summary table
Variable Value Source
GRB_name_Fermi GRB230523474
T0 11:23:05.988 UTC Fermi_GBM
ra 129.4500° Fermi_GBM
decl 29.0500° Fermi_GBM
pos_error 3.95e+00° Fermi_GBM
T90 18.368 s Fermi_GBM
T90_error 0.923 s Fermi_GBM
T90_start 11:23:05.988 UTC Fermi_GBM
fluence 4.57e-06 erg/cm² Fermi_GBM
fluence_error 2.64e-08 erg/cm² Fermi_GBM
T100 18.368 s
GBM_located True
mjd 60087.474374861114 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB230523474
trigger_name bn230523474
ra 129.4500°
decl 29.0500°
pos_error 3.95e+00°
datum 2023-05-23
t_trigger 11:23:09.188 UTC
T90 18.368 s
T90_error 0.923 s
T90_start 11:23:05.988 UTC
fluence 4.57e-06 erg/cm²
fluence_error 2.64e-08 erg/cm²
flux_1024 8.08e+00 erg/cm²/s
flux_1024_error 3.00e-01 erg/cm²/s
flux_1024_time 2.56e+00 erg/cm²/s
flux_64 1.08e+01 erg/cm²/s
flux_64_error 1.42e+00 erg/cm²/s
GCN 33856 table
GRB_name GRB230523A
GCN_number 33856
Detection_method Fermi GBM final loc
t_trigger 11:23:09 UTC
ra 129.4000°
decl 29.0000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 33856 SUBJECT: GRB 230523A: Fermi GBM Final Real-time Localization DATE: 23/05/23 11:33:48 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 11:23:09 UT on 23 May 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230523A (trigger 706533794.188064 / 230523474). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 129.4, Dec = 29.0 (J2000 degrees, equivalent to J2000 08h 37m, 29d 00'), with a statistical uncertainty of 3.7 degrees. The angle from the Fermi LAT boresight is 43.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230523474/quicklook/glg_skymap_all_bn230523474.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/bn230523474/quicklook/glg_healpix_all_bn230523474.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230523474/quicklook/glg_lc_medres34_bn230523474.gif
GCN 33859 table
GRB_name GRB230523A
GCN_number 33859
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 33859 SUBJECT: GRB 230523A: Swift/BAT-GUANO detection of a short hard burst DATE: 23/05/23 22:58:55 GMT FROM: Aaron Tohuvavohu at University of Toronto Gayathri Raman (PSU), Samuele Ronchini (PSU), James DeLaunay (UAlabama), Aaron Tohuvavohu (U Toronto), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC) report: Swift/BAT did not localize GRB 230523A onboard (T0: 2023-05-23T15:23:52.68 UTC, INTEGRAL/SPI-ACS #10268). The INTEGRAL 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 90 seconds of BAT event-mode data from [-45,+45] 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), detects the burst with a sqrt(TS) of 12.4 in a 1.024 s analysis time bin. The burst duration is ~2 seconds. NITRATES results, independently, are ambiguous with respect to whether this burst originates from in or outside the BAT coded FOV, with a borderline DeltaLLHOut of 8.33. 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/