GRBweb by P. Coppin

This page lists all entries on GRB231123C in GRBweb

Summary Fermi GBM GCN 35171 GCN 35179 GCN 35184 GCN 35187 GCN 35205

Summary table
Variable	Value	Source
GRB_name_Fermi	GRB231123832
T0	19:58:25 UTC	GCN_circulars,Fermi GBM final loc
ra	162.2600°	Fermi_GBM
decl	45.9000°	Fermi_GBM
pos_error	1.16e+01°	Fermi_GBM
T90	0.448 s	Fermi_GBM
T90_error	1.105 s	Fermi_GBM
T90_start	19:58:25.320 UTC	Fermi_GBM
fluence	1.14e-07 erg/cm²	Fermi_GBM
fluence_error	1.39e-08 erg/cm²	Fermi_GBM
T100	0.768 s
GBM_located	True
mjd	60271.832233796296	GCN_circulars,Fermi GBM final loc

Fermi GBM table
GRB_name_Fermi	GRB231123832
trigger_name	bn231123832
ra	162.2600°
decl	45.9000°
pos_error	1.16e+01°
datum	2023-11-23
t_trigger	19:58:25.384 UTC
T90	0.448 s
T90_error	1.105 s
T90_start	19:58:25.320 UTC
fluence	1.14e-07 erg/cm²
fluence_error	1.39e-08 erg/cm²
flux_1024	1.51e+00 erg/cm²/s
flux_1024_error	2.81e-01 erg/cm²/s
flux_1024_time	-1.92e-01 erg/cm²/s
flux_64	5.35e+00 erg/cm²/s
flux_64_error	1.30e+00 erg/cm²/s

GCN 35171 table
GRB_name	GRB231123C
GCN_number	35171
Detection_method	Fermi GBM final loc
t_trigger	19:58:25 UTC
ra	162.3000°
decl	45.9000°
Circular_text	TITLE: GCN CIRCULAR NUMBER: 35171 SUBJECT: GRB 231123C: Fermi GBM Final Real-time Localization DATE: 23/11/23 20:08:55 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely SHORT GRB At 19:58:25 UT on 23 Nov 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231123C (trigger 722462310.383788 / 231123832). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 162.3, Dec = 45.9 (J2000 degrees, equivalent to J2000 10h 49m, 45d 53'), with a statistical uncertainty of 22.2 degrees. The angle from the Fermi LAT boresight is 107.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231123832/quicklook/glg_skymap_all_bn231123832.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/bn231123832/quicklook/glg_healpix_all_bn231123832.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231123832/quicklook/glg_lc_medres34_bn231123832.gif

GCN 35179 table
GRB_name	GRB231123C
GCN_number	35179
Detection_method	Swift Other
Circular_text	TITLE: GCN CIRCULAR NUMBER: 35179 SUBJECT: GRB 231123C: Swift/BAT-GUANO detection of a short burst likely outside the coded FOV DATE: 23/11/24 18:30:16 GMT FROM: Aaron Tohuvavohu at University of Toronto 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 231123C onboard (T0: 2023-11-23T19:58:25 UTC, Fermi GBM Trig 722462310, GCN 35171). 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 12.8 in a 0.6 s analysis time bin, starting at T0 - 0.08 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 7.6. 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 35184 table
GRB_name	GRB231123C
GCN_number	35184
Detection_method	Fermi GBM Other
Circular_text	TITLE: GCN CIRCULAR NUMBER: 35184 SUBJECT: GRB 231123C (short): Glowbug gamma-ray detection DATE: 23/11/24 23:38:43 GMT FROM: C.C. Cheung at Naval Research Lab C.C. Cheung, M. Kerr, J. E. Grove, R. Woolf (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge (MSFC), and M.S. Briggs (UAH) report: The Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of GRB 231123C, which was also detected by Fermi/GBM and Swift/BAT-GUANO (GCN 35171, 35179). Using an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2023-11-23 19:58:24.304 with a duration of 0.256 s and a total significance of about 11.5 sigma. The light curve comprises a single peak. Using a standard power-law function with an exponential high-energy cutoff [3] to model the emission over this duration results in a photon index dN/dE~E^x of x=1.5 and a cutoff energy ("Epeak") of 322 keV. The modeled 10-10000 keV fluence is 2.4e-07 erg/cm^2. The analysis results presented here are preliminary and use a response function that lacks a detailed characterization of the surrounding passive structure of the ISS. Glowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC. It was launched on 2023 March 15 aboard the Department of Defense Space Test Program’s STP-H9 to the ISS. The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV. [1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959 [2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O [3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006 Distribution Statement A: Approved for public release. Distribution is unlimited.

GCN 35187 table
GRB_name	GRB231123C
GCN_number	35187
Detection_method	Fermi GBM Other
Circular_text	TITLE: GCN CIRCULAR NUMBER: 35187 SUBJECT: GRB 231123C: Insight-HXMT/HE detection DATE: 23/11/25 12:47:01 GMT FROM: yqzhang_cl@163.com Y.Q Zhang, S. L. Xiong, X. B. Li and C. K. Li report on behalf of the Insight-HXMT team: At 2023-11-23T19:58:25.38 (T0), Insight-HXMT/HE detected GRB 231123C (trigger ID: HEB231123832) in a routine search of the data, which was also observed by Fermi/GBM (Fermi GBM Team, GCN 35171), Swift/BAT(James DeLaunay et al., GCN 35179) and Glowbug (C. C. Cheung et al., GCN 35184). The Insight-HXMT/HE light curve mainly consists of single pulse with a duration (T90) of 0.41 s measured from T0-0.24 s. The 1-ms peak rate, measured from T0-0.09 s, is 1741 cnts/sec. The total counts from this burst is 291 counts. URL_LC: http://twiki.ihep.ac.cn/pub/HXMT/GRBList/HEB231123832_lc.jpg All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (deposited energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside the telescope. Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about it could be found at: http://www.hxmt.org.

GCN 35205 table
GRB_name	GRB231123C
GCN_number	35205
Detection_method	Fermi GBM Det
t_trigger	19:58:25.380 UTC
Circular_text	TITLE: GCN CIRCULAR NUMBER: 35205 SUBJECT: GRB 231123C: Fermi GBM Observation DATE: 23/11/28 00:38:45 GMT FROM: Sarah Dalessi at UAH S. Dalessi (UAH), S. Lesage (UAH) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 19:58:25.38 UT on 23 November 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231123C (trigger 722462310/231123832). which was also detected by Swift/BAT-GUANO (J. DeLaunay et al. 2023, GCN 35179). The Fermi Final Localization was reported in GCN 35171. The angle from the Fermi LAT boresight is 90 degrees. The GBM light curve single peak with a duration (T90) of about 0.4 s (50-300 keV). The time-averaged spectrum from T0-0.1 to T0+0.4 s is best fit by a Power law function with alpha = -1.29 +/- 0.06. The event fluence (10-1000 keV) in this time interval is (3.3 +/- 0.4)E-07 erg/cm^2. The 64-ms peak photon flux measured starting from T0-0.064 s in the 10-1000 keV band is 5 +/- 1 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/"