GRBweb by P. Coppin

This page lists all entries on GRB240205A in GRBweb

Summary Fermi GBM GCN 35679 GCN 35707 GCN 35710 GCN 35713

Summary table
Variable	Value	Source
GRB_name_Fermi	GRB240205852
T0	20:26:26.689 UTC	GCN_circulars,Konus-Wind Det
ra	300.9000°	Fermi_GBM
decl	20.5500°	Fermi_GBM
pos_error	6.02e+00°	Fermi_GBM
T90	1.792 s	Fermi_GBM
T90_error	0.653 s	Fermi_GBM
T90_start	20:26:29.177 UTC	Fermi_GBM
fluence	6.42e-07 erg/cm²	Fermi_GBM
fluence_error	1.45e-08 erg/cm²	Fermi_GBM
T100	4.28 s
GBM_located	True
mjd	60345.85169778935	GCN_circulars,Konus-Wind Det

Fermi GBM table
GRB_name_Fermi	GRB240205852
trigger_name	bn240205852
ra	300.9000°
decl	20.5500°
pos_error	6.02e+00°
datum	2024-02-05
t_trigger	20:26:30.713 UTC
T90	1.792 s
T90_error	0.653 s
T90_start	20:26:29.177 UTC
fluence	6.42e-07 erg/cm²
fluence_error	1.45e-08 erg/cm²
flux_1024	3.21e+00 erg/cm²/s
flux_1024_error	2.02e-01 erg/cm²/s
flux_1024_time	-5.12e-01 erg/cm²/s
flux_64	1.08e+01 erg/cm²/s
flux_64_error	1.00e+00 erg/cm²/s

GCN 35679 table
GRB_name	GRB240205A
GCN_number	35679
Detection_method	Fermi GBM final loc
t_trigger	20:26:30 UTC
ra	300.9000°
decl	20.5000°
Circular_text	TITLE: GCN CIRCULAR NUMBER: 35679 SUBJECT: GRB 240205A: Fermi GBM Final Real-time Localization DATE: 24/02/05 20:37:04 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely SHORT GRB At 20:26:30 UT on 5 Feb 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240205A (trigger 728857595.713148 / 240205852). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 300.9, Dec = 20.5 (J2000 degrees, equivalent to J2000 20h 03m, 20d 30'), with a statistical uncertainty of 6.0 degrees. The angle from the Fermi LAT boresight is 57.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240205852/quicklook/glg_skymap_all_bn240205852.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240205852/quicklook/glg_healpix_all_bn240205852.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240205852/quicklook/glg_lc_medres34_bn240205852.gif

GCN 35707 table
GRB_name	GRB240205A
GCN_number	35707
Detection_method	Konus-Wind Det
Circular_text	TITLE: GCN CIRCULAR NUMBER: 35707 SUBJECT: GRB 240205A (short): Glowbug gamma-ray detection DATE: 24/02/08 21:34:45 GMT FROM: C.C. Cheung at Naval Research Lab C.C. Cheung, R. Woolf, M. Kerr, J.E. Grove (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge, D. Kocevski (MSFC), and M.S. Briggs (UAH) report: The Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of the short GRB 240205A, which was also detected by Fermi/GBM (GCN 35679) and Konus-Wind (Trigger Time 20:26:26.689). Using an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2024-02-05 20:26:29.640 with a duration of 0.29 s and a total significance of about 24.0 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=1.0 and a cutoff energy ("Epeak") of 310 keV. The modeled 10-10000 keV fluence is 4.2e-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 35710 table
GRB_name	GRB240205A
GCN_number	35710
Detection_method	IPN Triangulation
t_trigger	20:26:31 UTC
Circular_text	TITLE: GCN CIRCULAR NUMBER: 35710 SUBJECT: IPN triangulation of GRB 240205A (short) DATE: 24/02/09 16:02:13 GMT FROM: Dmitry Svinkin at Ioffe Institute D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, A. Goldstein, M. S. Briggs, C. Wilson-Hodge, and E. Burns on behalf of the Fermi GBM team, E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, and S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team, report: The short-duration GRB 240205A (Ferm-GBM detection: The Fermi GBM team, GCN 35679; Glowbug detection: Cheung, et al., GCN 35707) was detected by Fermi (GBM trigger 728857595), Konus-Wind, INTEGRAL (SPI-ACS), and Swift (BAT) at about 73591 s UT (20:26:31). The burst was outside the coded field of view of the BAT. We have triangulated this GRB to the following annuli: --------------------------------------------------- annulus R.A. Dec. R dR (3sigma) (deg) (deg) (deg) (deg) --------------------------------------------------- Konus-GBM 297.778 -19.219 40.665 0.735 GBM-SPI-ACS 180.960 84.546 70.289 6.208 --------------------------------------------------- The annuli intersect to form a long 60.9 sq.deg (3 sigma) localization region. This localization may be improved. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB240205_T73586/IPN The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.

GCN 35713 table
GRB_name	GRB240205A
GCN_number	35713
Detection_method	Konus-Wind Det
t_trigger	20:26:26.689 UTC
Circular_text	TITLE: GCN CIRCULAR NUMBER: 35713 SUBJECT: Konus-Wind detection of GRB 240205A (short) DATE: 24/02/11 15:33:36 GMT FROM: Dmitry Frederiks at Ioffe Institute D. Frederiks, A.Lysenko, A. Ridnaia, D. Svinkin, A. Tsvetkova, M. Ulanov, and T. Cline, on behalf of the Konus-Wind team, report: The short-duration GRB 240205A (Fermi GBM Final Real-time Localization: GCN 35679; Glowbug gamma-ray detection: Cheung et al., GCN 35707; IPN triangulation: Svinkin et al., GCN 35710) triggered Konus-Wind at T0=73586.689 s UT (20:26:26.689). The burst light curve shows a single pulse, which starts at ~T0-0.2 s and has a total duration of ~0.45 s. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB240205_T73586/ As observed by Konus-Wind, the burst had a fluence of 5.45(-0.84,+0.89)x10^-7 erg/cm2, and a 16-ms peak flux, measured from T0-0.016 s, of 4.13(-0.92,+1.08)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range). Since the brightest part of the burst emission was detected before the trigger, the spectral analysis was performed using the KW 3-channel light curve data. Modelling the KW 3-channel time-integrated spectrum (measured from T0-0.192 s to T0+0.256 s) by a power law with exponential cutoff (CPL) model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep), yields alpha = -0.10(-0.38,+0.48) and Ep = 241(-46,+52) keV. Modelling the KW 3-channel spectrum near the peak count rate (measured from T0-0.064 s to T0) by the CPL model yields alpha = -0.30(-0.48,+0.64) and Ep = 317(-82,+136) keV. All the quoted errors are at the 68% confidence level. All the quoted values are preliminary.