GRB231214B

This page lists all entries on GRB231214B in GRBweb

Summary Fermi GBM GCN 35340 GCN 35400

Summary table
Variable Value Source
GRB_name_Fermi GRB231214329
T0 7:53:54.496 UTC Fermi_GBM
ra 137.9300° Fermi_GBM
decl -13.4200° Fermi_GBM
pos_error 4.00e+00° Fermi_GBM
T90 39.424 s Fermi_GBM
T90_error 1.619 s Fermi_GBM
T90_start 7:53:54.496 UTC Fermi_GBM
fluence 3.06e-06 erg/cm² Fermi_GBM
fluence_error 4.25e-08 erg/cm² Fermi_GBM
T100 39.424 s
GBM_located True
mjd 60292.32910296296 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB231214329
trigger_name bn231214329
ra 137.9300°
decl -13.4200°
pos_error 4.00e+00°
datum 2023-12-14
t_trigger 7:53:55.520 UTC
T90 39.424 s
T90_error 1.619 s
T90_start 7:53:54.496 UTC
fluence 3.06e-06 erg/cm²
fluence_error 4.25e-08 erg/cm²
flux_1024 1.56e+00 erg/cm²/s
flux_1024_error 1.73e-01 erg/cm²/s
flux_1024_time 6.40e-02 erg/cm²/s
flux_64 3.33e+00 erg/cm²/s
flux_64_error 8.11e-01 erg/cm²/s
GCN 35340 table
GRB_name GRB231214B
GCN_number 35340
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 35340 SUBJECT: GRB 231214B: Swift/BAT-GUANO detection of a burst DATE: 23/12/14 22:38:11 GMT FROM: Jimmy DeLaunay at Penn State James DeLaunay (PSU), Gayathri Raman (PSU), Samuele Ronchini (PSU), Aaron Tohuvavohu (U Toronto), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC) report: Swift/BAT did not localize GRB 231214B onboard (T0: 2023-12-14T07:53:55.52 UTC, Fermi GBM Trig 724233240). 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 8.6 in a 16.384 s analysis time bin, starting at T0 - 8.192 s. NITRATES results, independently, are ambiguous with respect to whether this burst originates from in or outside the BAT coded FOV, with a DeltaLLHOut of 8.2. 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 35400 table
GRB_name GRB231214B
GCN_number 35400
Detection_method Fermi GBM Det
t_trigger 7:53:55.520 UTC
ra 137.9000°
decl -13.4000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 35400 SUBJECT: GRB 231214B: Fermi GBM observation DATE: 23/12/19 08:42:25 GMT FROM: Elisabetta Bissaldi at Politecnico and INFN Bari E. Bissaldi (Politecnico and INFN Bari) and C. Meegan (UAH) report on behalf of the Fermi GBM Team: "At 07:53:55.52 UT on 14 December 2023, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 231214B (trigger 724233240 / 231214329), which was also detected by the Swift/BAT-GUANO (DeLaunay et al. 2023, GCN 35340). The on-ground calculated location, using the GBM trigger data, is RA = 137.9, DEC = -13.4 (J2000 degrees, equivalent to 09h 11m 36, -13d 24'), with a statistical uncertainty of 6.3 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 78 degrees. The GBM light curve shows a single weak and structured emission episode with a duration (T90) of about 39 s (50-300 keV). The time-averaged spectrum from T0-2 s to T0+39 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is 0.30 +/- 0.19 and the cutoff energy, parameterized as Epeak, is 148 +/- 15 keV. The event fluence (10-1000 keV) in this time interval is (3.02 +/- 0.24)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0 in the 10-1000 keV band is 1.56 +/- 0.17 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/"