GRB240516A

This page lists all entries on GRB240516A in GRBweb

Summary Fermi GBM IPN Swift GCN 36493 GCN 36496 GCN 36499 GCN 36502 GCN 36508 GCN 36510

Summary table
Variable Value Source
GRB_name_Fermi GRB240516150
T0 3:36:24.838 UTC Fermi_GBM
ra 212.8071° Swift
decl -63.4878° Swift
pos_error 7.90e-04° Swift
T90 46.337 s Fermi_GBM
T90_error 3.566 s Fermi_GBM
T90_start 3:36:26.118 UTC Fermi_GBM
fluence 2.55e-06 erg/cm² Fermi_GBM
fluence_error 5.83e-08 erg/cm² Fermi_GBM
T100 47.617 s
GBM_located False
mjd 60446.15028747685 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB240516150
trigger_name bn240516150
ra 212.8071°
decl -63.4878°
pos_error 5.32e+00°
datum 2024-05-16
t_trigger 3:36:24.838 UTC
T90 46.337 s
T90_error 3.566 s
T90_start 3:36:26.118 UTC
fluence 2.55e-06 erg/cm²
fluence_error 5.83e-08 erg/cm²
flux_1024 2.41e+00 erg/cm²/s
flux_1024_error 2.24e-01 erg/cm²/s
flux_1024_time 3.71e+00 erg/cm²/s
flux_64 4.11e+00 erg/cm²/s
flux_64_error 9.23e-01 erg/cm²/s
IPN table
GRB_name GRB240516A
ra 212.7708°
decl -63.5000°
pos_error 5.00e-02°
Swift table
GRB_name GRB240516A
t_trigger 3:36:28 UTC
ra 212.8071°
decl -63.4878°
pos_error 7.90e-04°
GCN 36493 table
GRB_name GRB240516A
GCN_number 36493
Detection_method Swift Det
t_trigger 3:36:28 UTC
ra 212.7700°
decl -63.5050°
Circular_text TITLE: GCN CIRCULAR NUMBER: 36493 SUBJECT: GRB 240516A: Swift detection of a burst DATE: 24/05/16 03:49:03 GMT FROM: K.L. Page at U Leicester T. M. Parsotan (GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL) and A. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels Swift Observatory Team: At 03:36:28 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 240516A (trigger=1228797). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 212.770, -63.505 which is RA(J2000) = 14h 11m 05s Dec(J2000) = -63d 30' 17" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of at least 20 sec. The peak count rate was ~1400 counts/sec (15-350 keV), at ~1 sec after the trigger. The XRT began observing the field at 03:38:50.4 UT, 142.1 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 212.8071, -63.4878 which is equivalent to: RA(J2000) = 14h 11m 13.70s Dec(J2000) = -63d 29' 16.1" with an uncertainty of 6.1 arcseconds (radius, 90% containment). This location is 85 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy. UVOT took a finding chart exposure of 2 seconds with the White filter starting 150 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. Because of the density of catalogued stars, further analysis is required to report an upper limit for any afterglow in the sub-image. Results from the list of sources generated on-board are not available at this time. No correction has been made for the large, but uncertain, extinction expected. Burst Advocate for this burst is T. M. Parsotan (parsotat AT umbc.edu). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/)
GCN 36496 table
GRB_name GRB240516A
GCN_number 36496
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 36496 SUBJECT: GRB 240516A: GOTO optical upper limit DATE: 24/05/16 11:35:07 GMT FROM: skyj1@leicester.ac.uk Y. Julakanti, B. P. Gompertz, A. Kumar, J. Lyman, R. Starling, K. Ackley, M. J. Dyer, K. Ulaczyk, F. Jimenez-Ibarra, D. O'Neill, D. Steeghs, D. K. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. P. Breton, L. K. Nuttall, E. Pall'e and D. Pollacco report on behalf of the GOTO collaboration: The Gravitational-wave Optical Transient Observer (GOTO, Steeghs et al. 2022) performed a targeted observation in response to Swift detected GRB 240516A (Parostan et al. GCN 36493) also detected by Fermi/GBM (trigger number 737523389) at 2024-05-16 UT 08:29:06 (4.9 hours after trigger). The observation consisted of 3x90s exposures in the GOTO L-band (400-700 nm). Images were processed immediately after acquisition using the GOTO pipeline. No optical counterpart is detected within the Swift/XRT 90% localisation region to a 3-sigma limiting magnitude of L > 20.3 (AB). Magnitudes were calibrated using ATLAS-REFCAT2 (Tonry et al. 2018) and are not corrected for Galactic extinction. GOTO (https://goto-observatory.org) is a network of telescopes that is principally funded by the STFC and operated at the Roque de los Muchachos Observatory on La Palma, Spain, and Siding Spring Observatory in NSW, Australia, on behalf of a consortium including the University of Warwick, Monash University, Armagh Observatory & Planetarium, the University of Leicester, the University of Sheffield, the National Astronomical Research Institute of Thailand (NARIT), the University of Turku, the University of Portsmouth, the University of Manchester and the Instituto de Astrofisica de Canarias (IAC).
GCN 36499 table
GRB_name GRB240516A
GCN_number 36499
Detection_method Fermi GBM Det
t_trigger 3:36:24.840 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 36499 SUBJECT: GRB 240516A: Fermi GBM Observation DATE: 24/05/16 22:55:10 GMT FROM: sumanbala2210@gmail.com S. Bala (USRA), S. Dalessi (UAH) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 03:36:24.84 UT on 16 May 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240516A (trigger 737523389/240516150). which was also detected by Swift BAT (T. M. Parsotan et al. 2024, GCN 36493). The Fermi GBM on-ground location is consistent with the Swift BAT position. The angle from the Fermi LAT boresight is 47 degrees. The GBM light curve consists of a single emission episode with a duration (T90) of about 46 s (50-300 keV). The time-averaged spectrum from T0+1.0 to T0+45.1 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.69 +/- 0.09 and the cutoff energy, parameterized as Epeak, is 528 +/- 72 keV. The event fluence (10-1000 keV) in this time interval is (1.12 +/- 0.06)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+3.7 s in the 10-1000 keV band is 2.4 +/- 0.2 ph/s/cm^2. A Band function fits the spectrum equally well with Epeak= 490 +/- 107 keV, alpha = -0.7 +/- 0.1 and beta = -2.1 +/- 0.3. 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/"
GCN 36502 table
GRB_name GRB240516A
GCN_number 36502
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 36502 SUBJECT: GRB 240516A: Swift-XRT refined Analysis DATE: 24/05/17 06:58:50 GMT FROM: Phil Evans at U of Leicester K.L. Page (U. Leicester) reports on behalf of the Swift-XRT team: We have analysed 6.7 ks of XRT data for GRB 240516A. Following the prompt detection of an X-ray source reported in GCN Circ. 36493 (Parsotan et al.), Swift passed into the South Atlantic Anomaly, and so no further data were collected until 1.6 ks after the BAT trigger. Combining all the Photon Counting (PC) mode data collected after this time (6.7 ks, from 1.6 to 45.5 ks post-trigger), the source is no longer detected, with a 3-sigma upper limit of 2.2 x 10^-3 count s^-1. Assuming a typical GRB spectrum with a photon spectral index of 1.9 and the Galactic absorption column of 1.29 x 10^22 cm^-2 (Willingale et al. 2013), the counts to observed (unabsorbed) 0.3-10 keV flux conversion deduced from this spectrum is 5.6 x 10^-11 (1.0 x 10^-10) erg cm^-2 count^-1. The observed (unabsorbed) flux upper limit for the X-ray source is thus 1.2 x 10^-13 (2.2 x 10^-13) erg cm^-2 s^-1. This circular is an official product of the Swift-XRT team.
GCN 36508 table
GRB_name GRB240516A
GCN_number 36508
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 36508 SUBJECT: GRB 240516A ATCA radio observations DATE: 24/05/17 19:23:22 GMT FROM: Sarah Chastain at University of New Mexico S. Chastain (UNM), J. K. Leung (U. Toronto/HUJI), G. E. Anderson (Curtin University), A. Gulati (U. Sydney), L. Rhodes (U. Oxford), A. J. van der Horst (GWU) on behalf of the PanRadio GRB collaboration The Australia Telescope Compact Array (ATCA) performed observations of the long GRB 240516A detected by Swift-BAT (Parsotan et al., GCN 36493), Fermi-GBM (S. Bala et al., GCN 26499), and AstroSat CZTI (Joshi et al., GCN 36503) at 5.5, 9, 17 and 19 GHz as part of the Large ATCA "PanRadio GRB" follow-up programme C3542 (PI. Anderson). ATCA start observing on 2024-05-16 at 13:24 UT (~10 hours post-burst) and continued to observe until 21:00 UT on 2024-05-16. In our preliminary analysis, we find no radio source coincident with the Swift XRT uncataloged source (Parsotan et al., GCN 36493) with 3 sigma upper limits of 186, 126, 276 and 381 microJy/beam at 5.5, 9.0, 17 and 19 GHz, respectively. We thank the CSIRO Space and Astronomy staff for supporting these observations. We acknowledge the Gomeroi people as the traditional owners of the Observatory site. The Australia Telescope Compact Array is part of the Australia Telescope National Facility (https://ror.org/05qajvd42) which is funded by the Australian Government for operation as a National Facility managed by CSIRO.
GCN 36510 table
GRB_name GRB240516A
GCN_number 36510
Detection_method Swift-BAT Det
ra 212.7840°
decl -63.4950°
Circular_text TITLE: GCN CIRCULAR NUMBER: 36510 SUBJECT: GRB 240516A: Swift-BAT refined analysis DATE: 24/05/17 21:45:50 GMT FROM: Amy S. Laha (GSFC/UMBC), S. D. Barthelmy (GSFC), R. Gupta (GSFC), H. A. Krimm (NSF), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), M. J. Moss (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC), D. Sadaula (GSFC/UMBC), T. Sakamoto (AGU) (i.e. the Swift-BAT team): Using the data set from T-200 to T+200 sec from the recent telemetry downlink, we report further analysis of BAT GRB 240516A (trigger #1228797) (Parsotan et al., GCN Circ. 36493). The BAT ground-calculated position is RA, Dec = 212.784, -63.495 deg which is RA(J2000) = 14h 11m 08.3s Dec(J2000) = -63d 29' 41.7" with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 45%. The mask-weighted light curve shows a single-peaked, FRED-like structure that starts at ~T-5 s, peaks at ~T-2 s, and ends at ~T+15 s. In addition, there are some weak tail emissions that last till ~T+110 s. T90 (15-350 keV) is 94.69 +- 34.00 sec (estimated error including systematics). The time-averaged spectrum from T-4.75 to T+112.50 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.09 +- 0.19. The fluence in the 15-150 keV band is 2.0 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-2.20 sec in the 15-150 keV band is 1.1 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at https://swift.gsfc.nasa.gov/results/batgrbcat/BAT_refined_circular/1228797