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This page lists all entries on GRB231124A in GRBweb

Summary Fermi GBM GCN 35174 GCN 35176 GCN 35183 GCN 35193

Summary table
Variable	Value	Source
GRB_name_Fermi	GRB231124360
T0	8:38:10.351 UTC	Fermi_GBM
ra	237.4800°	Fermi_GBM
decl	10.8600°	Fermi_GBM
pos_error	2.85e+00°	Fermi_GBM
T90	22.017 s	Fermi_GBM
T90_error	0.923 s	Fermi_GBM
T90_start	8:38:10.351 UTC	Fermi_GBM
fluence	1.24e-05 erg/cm²	Fermi_GBM
fluence_error	3.97e-08 erg/cm²	Fermi_GBM
T100	22.017 s
GBM_located	True
mjd	60272.359842025464	Fermi_GBM

Fermi GBM table
GRB_name_Fermi	GRB231124360
trigger_name	bn231124360
ra	237.4800°
decl	10.8600°
pos_error	2.85e+00°
datum	2023-11-24
t_trigger	8:38:11.887 UTC
T90	22.017 s
T90_error	0.923 s
T90_start	8:38:10.351 UTC
fluence	1.24e-05 erg/cm²
fluence_error	3.97e-08 erg/cm²
flux_1024	9.90e+00 erg/cm²/s
flux_1024_error	3.31e-01 erg/cm²/s
flux_1024_time	1.14e+01 erg/cm²/s
flux_64	1.29e+01 erg/cm²/s
flux_64_error	1.46e+00 erg/cm²/s

GCN 35174 table
GRB_name	GRB231124A
GCN_number	35174
Detection_method	Fermi GBM final loc
t_trigger	8:38:11 UTC
ra	237.5000°
decl	10.9000°
Circular_text	TITLE: GCN CIRCULAR NUMBER: 35174 SUBJECT: GRB 231124A: Fermi GBM Final Real-time Localization DATE: 23/11/24 08:48:40 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 08:38:11 UT on 24 Nov 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231124A (trigger 722507896.88707 / 231124360). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 237.5, Dec = 10.9 (J2000 degrees, equivalent to J2000 15h 50m, 10d 54'), with a statistical uncertainty of 2.1 degrees. The angle from the Fermi LAT boresight is 79.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231124360/quicklook/glg_skymap_all_bn231124360.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/bn231124360/quicklook/glg_healpix_all_bn231124360.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231124360/quicklook/glg_lc_medres34_bn231124360.gif

GCN 35176 table
GRB_name	GRB231124A
GCN_number	35176
Detection_method	CALET
Circular_text	TITLE: GCN CIRCULAR NUMBER: 35176 SUBJECT: GRB 231124A: CALET Gamma-Ray Burst Monitor detection DATE: 23/11/24 14:01:20 GMT FROM: Yuta Kawakubo at Louisiana State University S. Torii (Waseda U), A. Yoshida, T. Sakamoto, S. Sugita (AGU), Y. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA), Y. Asaoka (ICRR), Y. Akaike, K. Kobayashi (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC), M. L. Cherry (LSU), S. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena), and the CALET collaboration: The long GRB 231124A (Fermi GBM Final Real-time Localization: Fermi GBM team, GCN Circ. 35174) triggered the CALET Gamma-ray Burst Monitor (CGBM) at 08:38:12.68 UTC on 24 November 2023 (http://cgbm.calet.jp/cgbm_trigger/flight/1384850206/). The burst signal was seen by all CGBM detectors. The burst light curve shows a multi-peaked structure that starts at T-0.2 sec, peaks at T+10.9 sec, and ends at T+17.9 sec. The T90 and T50 durations measured by the SGM data are 16.7 +/- 1.0 sec and 7.1 +/- 1.1 sec (40-1000 keV), respectively. The ground-processed light curve is available at http://cgbm.calet.jp/cgbm_trigger/ground/1384850206/ The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at Waseda University.

GCN 35183 table
GRB_name	GRB231124A
GCN_number	35183
Detection_method	CALET
Circular_text	TITLE: GCN CIRCULAR NUMBER: 35183 SUBJECT: GRB 231124A: Glowbug gamma-ray detection DATE: 23/11/24 22:31:50 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 231124A, which was also detected by Fermi/GBM and CALET (GCN 35174, 35176). Using an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2023-11-24 08:38:09.832 with a duration of 21.0 s and a total significance of about 44.7 sigma. The light curve comprises a multi-peaked structure with maximum rates at ~T0+13s and ~T0+19s. 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=0.9 and a cutoff energy ("Epeak") of 254 keV. The modeled 10-10000 keV fluence is 4.9e-06 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 35193 table
GRB_name	GRB231124A
GCN_number	35193
Detection_method	CALET
Circular_text	TITLE: GCN CIRCULAR NUMBER: 35193 SUBJECT: GRB 231124A: GRBAlpha detection DATE: 23/11/26 16:56:42 GMT FROM: Marianna Dafčíková at Masaryk University <500025@mail.muni.cz> M. Dafcikova, J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), N. Werner (Masaryk U.), M. Ohno, H. Takahashi (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Observatory), N. Husarikova, F. Munz , M. Topinka, M. Kolar, L. Szakszonova, J.-P. Breuer, F. Hroch (Masaryk U.), T. Urbanec, M. Kasal, A. Povalac (Brno U. of Technology), J. Hudec, J. Kapus, M. Frajt (Spacemanic s.r.o), R. Laszlo, M. Koleda (Needronix s.r.o), M. Smelko, P. Hanak, P. Lipovsky (Technical U. of Kosice), G. Galgoczi (Wigner Research Center/Eotvos U.), Y. Uchida, H. Poon, H. Matake (Hiroshima U.), N. Uchida (ISAS/JAXA), T. Bozoki (Eotvos U.), G. Dalya (Eotvos U.), yyT. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), G. Friss (Eotvos U.), Y. Fukazawa, K. Hirose (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), K. Kapas (Eotvos U.), L. L. Kiss (Konkoly Observatory), T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), J. Takatsy (Eotvos U.), K. Torigoe (Hiroshima U.), N. Kogiso, M. Yoneyama (Osaka Metropolitan U.), M. Moritaki (U. Tokyo), T. Kano (U. Michigan) -- the GRBAlpha collaboration. The long-duration GRB 231124A (Fermi/GBM detection: GCN 35174; CALET/CGBM detection: GCN 35176; Glowbug detection: GCN 35183; INTEGRAL/SPI-ACS peak detection at 2023-11-24 ~08:38:25 UT) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023, A&A, 677, 40; arXiv:2302.10048). The detection was confirmed at the peak time 2023-11-24 08:38:17 UTC. The T90 duration measured by GRBAlpha is 20 s and the overall significance during T90 reaches 12 sigma. The light curve obtained by GRBAlpha is available here: https://grbalpha.konkoly.hu/static/share/GRB231124A_GCN.pdf All GRBAlpha detections are listed at: https://monoceros.physics.muni.cz/hea/GRBAlpha/ GRBAlpha, launched on 2021 March 22, is a demonstration mission for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). The detector of GRBAlpha consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~50 keV to ~1000 keV. To increase the duty cycle and the downlink rate, the upgrade of the on-board data acquisition software stack is in progress. The ground segment is also supported by the radio amateur community and it takes advantage of the SatNOGS network for increased data downlink volume.