GRB231025A

This page lists all entries on GRB231025A in GRBweb

Summary Fermi GBM GCN 34883 GCN 34884 GCN 34886

Summary table
Variable Value Source
GRB_name_Fermi GRB231025283
T0 6:46:56.001 UTC Fermi_GBM
ra 190.9600° Fermi_GBM
decl -53.0800° Fermi_GBM
pos_error 1.13e+01° Fermi_GBM
T90 5.888 s Fermi_GBM
T90_error 3.806 s Fermi_GBM
T90_start 6:46:56.001 UTC Fermi_GBM
fluence 3.52e-07 erg/cm² Fermi_GBM
fluence_error 2.84e-08 erg/cm² Fermi_GBM
T100 5.888 s
GBM_located True
mjd 60242.28259260417 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB231025283
trigger_name bn231025283
ra 190.9600°
decl -53.0800°
pos_error 1.13e+01°
datum 2023-10-25
t_trigger 6:46:59.585 UTC
T90 5.888 s
T90_error 3.806 s
T90_start 6:46:56.001 UTC
fluence 3.52e-07 erg/cm²
fluence_error 2.84e-08 erg/cm²
flux_1024 1.33e+00 erg/cm²/s
flux_1024_error 2.69e-01 erg/cm²/s
flux_1024_time -3.07e+00 erg/cm²/s
flux_64 3.94e+00 erg/cm²/s
flux_64_error 1.16e+00 erg/cm²/s
GCN 34883 table
GRB_name GRB231025A
GCN_number 34883
Detection_method Fermi GBM Other
ra 190.9600°
decl -53.0800°
Circular_text TITLE: GCN CIRCULAR NUMBER: 34883 SUBJECT: GRB 231025A: Fermi GBM Final Localization DATE: 23/10/25 15:38:43 GMT FROM: Joe Mangan at IJCLab The Fermi GBM team reports the detection of a likely SHORT GRB "At 06:46:59.59 UT on 25 October 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231025A (trigger 719909224/231025283). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 190.96, Dec = -53.08 (J2000 degrees, equivalent to J2000 12h 44m, -53d 05'), with a statistical uncertainty of 16.32 degrees. The angle from the Fermi LAT boresight is 113 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231025283/quicklook/glg_skymap_all_bn231025283.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/bn231025283/quicklook/glg_healpix_all_bn231025283.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231025283/quicklook/glg_lc_medres34_bn231025283.gif"
GCN 34884 table
GRB_name GRB231025A
GCN_number 34884
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 34884 SUBJECT: GRB 231025A: Swift/BAT-GUANO detection of a likely short burst DATE: 23/10/25 16:51:56 GMT FROM: Samuele Ronchini at PSU Samuele Ronchini (PSU), Aaron Tohuvavohu (U Toronto), James DeLaunay (PSU), Gayathri Raman (PSU), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC) report: Swift/BAT did not localize GRB 231025A onboard (T0: 22023-10-25T06:46:59.59 UTC,Fermi GCN 34883). 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), detects the burst with a sqrt(TS) of 10.1 in a 4.096 s analysis time bin, starting at T0 -4.0961 s. NITRATES results are consistent with a burst detected inside the BAT coded FOV, with a DeltaLLHOut of 13.17, and are consistent with Fermi GBM's localization (GCN 34883). 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/
GCN 34886 table
GRB_name GRB231025A
GCN_number 34886
Detection_method Fermi GBM Det
t_trigger 6:46:59.590 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 34886 SUBJECT: GRB 231025A: Fermi GBM Observation DATE: 23/10/25 21:04:53 GMT FROM: Joe Mangan at IJCLab J.Mangan (CNRS/IJCLab) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 06:46:59.59 UT on 25 October 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231025A (trigger 719909224/231025283). which was also detected by Swift/BAT-GUANO (Ronchini et al. 2023, GCN 34884). The Fermi GBM Final Real-time Localization is reported in GCN 34883. The GBM light curve consists of a single emission episode with a duration (T90) of about 6 s (50-300 keV). The time-averaged spectrum from T0-2.0 to T0+4.1 s is best fit by a simple power law function with index -1.4 +/- 0.1. The event fluence (10-1000 keV) in this time interval is (1.2 +/- 0.2)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0-3.1 s in the 10-1000 keV band is 1.3 +/- 0.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"