GRB230616A

This page lists all entries on GRB230616A in GRBweb

Summary IPN GCN 33982 GCN 33983 GCN 33988 GCN 34006 GCN 34046

Summary table
Variable Value Source
T0 20:37:58 UTC GCN_circulars,IPN Triangulation
ra 192.0333° IPN
decl 5.6833° IPN
pos_error 6.67e-02° IPN
GBM_located False
mjd 60111.85969907408 GCN_circulars,IPN Triangulation
IPN table
GRB_name GRB230616A
ra 192.0333°
decl 5.6833°
pos_error 6.67e-02°
GCN 33982 table
GRB_name GRB230616A
GCN_number 33982
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 33982 SUBJECT: GRB 230616A: Swift/BAT-GUANO detection of a short burst outside the coded FOV DATE: 23/06/17 03:52:13 GMT FROM: Aaron Tohuvavohu at University of Toronto Aaron Tohuvavohu (U Toronto), James DeLaunay (U Alabama), Samuele Ronchini (PSU), Gayathri Raman (PSU), Jamie A. Kennea (PSU) report: Swift/BAT did not localize GRB 230616A onboard (T0: 2023-06-16T20:37:56.8 UTC, INTEGRAL trig 10287) The INTEGRAL 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 90 seconds of BAT event-mode data from [-45,+45] 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 29.2 in a 0.128 s analysis time bin. NITRATES results are consistent with a burst coming from outside the FOV, with DeltaLLHOut of -1. 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 33983 table
GRB_name GRB230616A
GCN_number 33983
Detection_method AstroSat CZTI
Circular_text TITLE: GCN CIRCULAR NUMBER: 33983 SUBJECT: GRB 230616A: AstroSat CZTI detection DATE: 23/06/17 05:57:29 GMT FROM: Gaurav Waratkar at IIT Bombay G. Waratkar (IITB), P K. Navaneeth (IUCAA), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a bright short GRB 230616A which was also detected by INTEGRAL/SPI-ACS (Trig 10287) and Swift/BAT-GUANO (Tohuvavohu et al., GCN Circ. 33982). The source was clearly detected in the 20-200 keV energy range. The light curve peaks at 2023-06-16 20:37:58.765 UTC. The measured peak count rate associated with the burst is 6385 (+1349, -1043) counts/s above the background in the combined data of all quadrants, with a total of 307 (+42, -47) counts. The local mean background count rate was 431 (+29, -43) counts/s. Using cumulative rates, we measure a T90 of 0.06 (+0.01, -0.01) s. The source was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project. CZTI GRB detections are reported regularly on the payload site at: http://astrosat.iucaa.in/czti/?q=grb
GCN 33988 table
GRB_name GRB230616A
GCN_number 33988
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 33988 SUBJECT: GRB 230616A: Swift ToO observations DATE: 23/06/18 03:33:14 GMT FROM: Phil Evans at U of Leicester P. A. Evans (U. Leicester) reports on behalf of the Swift team: Swift has initiated a ToO observation of the IPN GRB 230616A. Automated analysis of the XRT data will be presented online at https://www.swift.ac.uk/ToO_GRBs/00021576 Any uncatalogued X-ray sources detected in this analysis will be reported on this website and via GCN COUNTERPART notices. These are not necessarily related to the IPN event. Any X-ray source considered to be a probable afterglow candidate will be reported via a GCN Circular after manual consideration. Details of the XRT automated analysis methods are detailed in Evans et al. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8). This circular is an official product of the Swift-XRT team.
GCN 34006 table
GRB_name GRB230616A
GCN_number 34006
Detection_method Swift-XRT Other
ra 192.1005°
decl 5.4365°
Circular_text TITLE: GCN CIRCULAR NUMBER: 34006 SUBJECT: GRB 230616A: Swift-XRT observations DATE: 23/06/18 15:39:42 GMT FROM: Phil Evans at U of Leicester P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), D.N. Burrows (PSU), J. D. Gropp (PSU), S. Dichiara (PSU), A.P. Beardmore (U. Leicester), J.P. Osborne (U. Leicester), E. Ambrosi (INAF-IASFPA) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the IPN-detected burst GRB 230616A in a series of observations tiled on the sky. The total exposure time is 4.6 ks, distributed over 4 tiles; the maximum exposure at a single sky location was 2.0 ks. The data were collected between T0+111.3 ks and T0+140.7 ks, and are entirely in Photon Counting (PC) mode. Three uncatalogued X-ray sources have been detected, however none of them is above the RASS limit or shows definitive signs of fading. Therefore, at the present time we cannot identify which, if any, is the afterglow. Details of these sources are given below: Source 1: RA (J2000): 192.1005 = 12:48:24.12 Dec (J2000): +5.4365 = +05:26:11.4 Error: 8.2 arcsec (radius, 90% conf.) Count-rate: 0.0177 [+0.0053, -0.0045] ct s^-1 Distance: 1675 arcsec from IPN position. Flux: (6.8 [+2.1, -1.7])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV) Source 2: RA (J2000): 192.2299 = 12:48:55.18 Dec (J2000): +6.0936 = +06:05:36.9 Error: 5.1 arcsec (radius, 90% conf. [Enhanced position]) Count-rate: 0.0125 [+0.0046, -0.0037] ct s^-1 Distance: 820 arcsec from IPN position. Flux: (4.2 [+1.5, -1.3])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV) Source 3: RA (J2000): 191.8031 = 12:47:12.74 Dec (J2000): +5.5136 = +05:30:48.9 Error: 6.0 arcsec (radius, 90% conf.) Count-rate: (5.7 [+3.5, -2.5])e-3 ct s^-1 Distance: 1769 arcsec from IPN position. The results of the XRT-team automatic analysis of the tiled XRT observations, including a position-specific upper limit calculator, are available at https://www.swift.ac.uk/xrt_products/TILED_GRB00112. This circular is an official product of the Swift-XRT team.
GCN 34046 table
GRB_name GRB230616A
GCN_number 34046
Detection_method IPN Triangulation
t_trigger 20:37:58 UTC
ra 192.0350°
decl 5.6830°
Circular_text TITLE: GCN CIRCULAR NUMBER: 34046 SUBJECT: IPN triangulation of GRB 230616A (short) DATE: 23/06/21 09:19:52 GMT FROM: Dmitry Svinkin at Ioffe Institute A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the MGNS/BepiColombo and HEND/Mars Odyssey teams, J. Benkhoff on behalf of the BepiColombo team, D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, E. Burns on behalf of the IPN, E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team, and W. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr, and A.S. Gardner on on behalf of the GRS-Odyssey GRB team, report: The bright, short-duration GRB 230616A (Swift-BAT/GUANO detection: Tohuvavohu et al., GCN Circ. 33982; AstroSat-CZTI detection: Waratkar et al., GCN Circ. 33983) was detected by Swift (BAT), Konus-Wind, INTEGRAL (SPI-ACS), AstroSat (CZTI), Mars-Odyssey (HEND), and BepiColombo (MGNS) at about 74278 s UT (20:37:58). The burst was outside the coded field of view of the BAT. We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 192.035 (12h 48m 08s) +5.683 ( +5d 40' 57") Corners: 192.022 (12h 48m 05s) +5.663 ( +5d 39' 46") 192.049 (12h 48m 12s) +5.714 ( +5d 42' 49") 192.048 (12h 48m 12s) +5.702 ( +5d 42' 08") 192.022 (12h 48m 05s) +5.652 ( +5d 39' 06") --------------------------------------------- The error box area is 0.9 sq. arcmin, and its maximum dimension is 4 arcmin (the minimum one is 0.3 arcmin). The Sun distance was 103 deg. This box may be improved. The Swift-XRT sources (D'Avanzo et al., GCN Circ. 34006) are outside the IPN box. There are no obvious catalogued host galaxies (from GLADE+ catalog; Dalya et al., MNRAS 514, 1, 1403, 2022) inside the box. A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB230616_T74278/IPN The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.