GRB230723A

This page lists all entries on GRB230723A in GRBweb

Summary Fermi GBM IPN GCN 34237 GCN 34258 GCN 34269 GCN 34301 GCN 34309

Summary table
Variable Value Source
GRB_name_Fermi GRB230723194
T0 4:38:43 UTC GCN_circulars,IPN Triangulation
ra 22.9083° IPN
decl -67.0667° IPN
pos_error 2.10e+00° IPN
T90 0.768 s Fermi_GBM
T90_error 0.231 s Fermi_GBM
T90_start 4:38:43.403 UTC Fermi_GBM
fluence 3.46e-07 erg/cm² Fermi_GBM
fluence_error 4.82e-08 erg/cm² Fermi_GBM
T100 1.171 s
GBM_located False
mjd 60148.193553240744 GCN_circulars,IPN Triangulation
Fermi GBM table
GRB_name_Fermi GRB230723194
trigger_name bn230723194
ra 22.9092°
decl -67.0589°
pos_error 4.83e+00°
datum 2023-07-23
t_trigger 4:38:43.467 UTC
T90 0.768 s
T90_error 0.231 s
T90_start 4:38:43.403 UTC
fluence 3.46e-07 erg/cm²
fluence_error 4.82e-08 erg/cm²
flux_1024 4.90e+00 erg/cm²/s
flux_1024_error 5.58e-01 erg/cm²/s
flux_1024_time -2.56e-01 erg/cm²/s
flux_64 1.03e+01 erg/cm²/s
flux_64_error 2.43e+00 erg/cm²/s
IPN table
GRB_name GRB230723A
ra 22.9083°
decl -67.0667°
pos_error 2.10e+00°
GCN 34237 table
GRB_name GRB230723A
GCN_number 34237
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 34237 SUBJECT: GRB 230723A: AGILE/MCAL detection DATE: 23/07/23 15:01:44 GMT FROM: Gabriele Panebianco G. Panebianco (Univ. Bologna - INAF/OAS Bologna), C. Casentini (INAF/IAPS), F. Verrecchia, C. Pittori (SSDC, and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), A. Ursi (ASI and INAF/IAPS), A. Argan, M. Cardillo, Y. Evangelista, L. Foffano, G. Piano (INAF/IAPS), A. Addis, L. Baroncelli, A. Bulgarelli, A. Ciabattoni, A. Di Piano, V. Fioretti, N. Parmiggiani (INAF/OAS-Bologna), F. Lucarelli (SSDC, and INAF/OAR), M. Marisaldi (INAF/OAS-Bologna, and Bergen University), M. Pilia, A. Trois (INAF/OA-Cagliari), F. Longo (Univ. Trieste and INFN Trieste), I. Donnarumma, E. Menegoni (ASI), A. Giuliani (INAF/IASF-Mi), P. Cattaneo (INFN Pavia), F. Cutrona (Univ. Milano Bicocca) and P. Tempesta (TeleSpazio) report on behalf of the AGILE Team: The AGILE satellite detected the GRB 230723A at T0 = 2023-07-23 04:38:43 s (UTC), reported by Fermi GBM and Global MASTER-Net (GCNs #34232, #34233). The burst is clearly visible in the AGILE scientific ratemeters of the MiniCALorimeter (MCAL; 0.4-100 MeV), and AntiCoincidence (AC; 50-200 keV) detectors. The event lasted about 4 s and it released a total number of 3239 counts in the MCAL detector (above a background rate of 499 Hz) and 16051 counts in the AC-Top detector (above a background rate of 2505 Hz). The AGILE ratemeters light curves can be found at http://www.agilescienceapp.it/notices/GRB230723A_AGILE_RM_ND.png . The event also triggered a high time resolution MCAL data acquisition, from T0-5.0 s to T0+8.6 s (UTC), and released 1186 counts in the detector, above a background rate of 449 Hz. The MCAL light curve can be found at http://www.agilescienceapp.it/notices/GRB230723A_084565_617171923.000000.png . The time-integrated spectrum of the burst between T0 and T0+2s be fitted in the energy range 0.4-10 MeV with a power-law with ph. ind. = -1.8 +/- 0.3, resulting in a reduced chi-squared of 0.94 (48 d.o.f.) and a fluence of 2.5e-06 ergs/cm^2 (90% confidence level), in the same energy range. At the T0, the event was 103 deg off-axis. Additional analysis of AGILE data is in progress. Automatic MCAL GRB alert Notices can be found at: https://gcn.gsfc.nasa.gov/agile_mcal.html
GCN 34258 table
GRB_name GRB230723A
GCN_number 34258
Detection_method IPN Triangulation
t_trigger 4:38:43 UTC
ra 22.9090°
decl -67.0590°
Circular_text TITLE: GCN CIRCULAR NUMBER: 34258 SUBJECT: IPN triangulation of GRB 230723A (short) DATE: 23/07/25 15:40:41 GMT FROM: Anna Ridnaia at Ioffe Institute A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the HEND/Mars Odyssey team, A. Ridnaia, D. Frederiks, D. Svinkin, 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, 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 short-duration GRB 230723A (Fermi GBM detection: The Fermi GBM team, GCN 34232; AGILE/MCAL detection: Panebianco et al., GCN 34237) has been detected by Fermi (GBM), Konus-Wind, AGILE (MCAL, AC), and Mars-Odyssey (HEND), so far, at about 16723 s UT (04:38:43). We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 22.909 (01h 31m 38s) -67.059 (-67d 03' 31") Corners: 24.618 (01h 38m 28s) -66.230 (-66d 13' 48") 24.638 (01h 38m 33s) -66.276 (-66d 16' 34") 21.066 (01h 24m 16s) -67.859 (-67d 51' 31") 21.054 (01h 24m 13s) -67.813 (-67d 48' 46") --------------------------------------------- The error box area is 265 sq. arcmin, and its maximum dimension is 2.1 deg (the minimum one is 2 arcmin). The Sun distance was 111 deg. The IPN localization is consistent with, but reduces the area of, the Fermi-GBM final localization (GCN 34232). This localization may be improved. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB230723_T16725/IPN/ The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.
GCN 34269 table
GRB_name GRB230723A
GCN_number 34269
Detection_method Konus-Wind Det
t_trigger 4:38:45.802 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 34269 SUBJECT: Konus-Wind detection of GRB 230723A DATE: 23/07/26 15:06:31 GMT FROM: Anna Ridnaia at Ioffe Institute A.Ridnaia, D. Frederiks, A.Lysenko, D. Svinkin, A. Tsvetkova, M. Ulanov, and T. Cline, on behalf of the Konus-Wind team, report: The short-duration GRB 230723A (Fermi GBM detection: The Fermi GBM team, GCN 34232; AGILE/MCAL detection: Panebianco et al., GCN 34237; IPN triangulation: Kozyrev et al., GCN 34258) triggered Konus-Wind at T0=16725.802 s UT (04:38:45.802). The burst light curve shows a multipeaked structure, which starts at T0-0.346 s and has a total duration of ~0.62 s. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB230723_T16725/ As observed by Konus-Wind, the burst had a fluence of 1.66(-0.06,+0.54)x10^-6 erg/cm2, and a 16-ms peak flux, measured from T0-0.220 s, of 8.56(-1.76,+3.29)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range). Since the main fraction 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 T0-0.346 s to T0+0.620 s) by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep), yields alpha = -0.21(-0.26,+0.27) and Ep = 659(-99,+162) keV. All the quoted errors are at the 68% confidence level. All the quoted values are preliminary.
GCN 34301 table
GRB_name GRB230723A
GCN_number 34301
Detection_method Fermi GBM Other
ra 43.5275°
decl -70.4770°
Circular_text TITLE: GCN CIRCULAR NUMBER: 34301 SUBJECT: GRB 230723A: Detection of candidate millimeter-band radiation by SPT-3G DATE: 23/07/31 19:40:10 GMT FROM: Sam Guns at S Pole Telescope & UC Berkeley S. Guns (UC Berkeley), A. Foster (CWRU), C. Tandoi (UIUC), K. Phadke (UIUC), N. Whitehorn (MSU), G. Holder (UIUC), J. Vieira (UIUC) on behalf of the South Pole Telescope Collaboration: On 26 July 2023 at 16:48 UTC the South Pole Telescope detected a millimeter-band transient candidate at RA = 43.5275, Dec = -70.4770 (J2000 degrees, uncertainty 12 arcseconds) using the SPT-3G camera in 2 bands centered at 95 GHz and 150 GHz. Peak emission was observed two hours later at 19:14 UTC with flux levels of 18.5 mJy in both bands, after which the SPT slewed away from the observing field. The next series of observations on 28 July showed flux levels consistent with zero. The spatial location of the emission is consistent (1.5 sigma) with GRB 230723A which was detected by Fermi-GBM on 23 July 2023 at RA = 21.0, Dec = -71.2 (J2000 degrees, uncertainty 4.8 degrees). From the SPT-3G transients program, short duration (<1 week) millimeter-band transients that are not associated with nearby stars are rare (<3 events per year). A table of SPT-3G observations is given below. The lightcurve can be found at: https://pole.uchicago.edu/public/data/transients/lightcurves/SPT-SVJ025406.5-702837.png Observation time | Flux (95 GHz) | Error (95 GHz) | Flux (150 GHz) | Error (150 GHz) 2023-7-22 05:04 UTC | -3.0 mJy | 2.5 mJy | -3.3 mJy | 3.0 mJy 2023-7-26 16:48 UTC | 13.3 mJy | 4.4 mJy | 14.0 mJy | 4.9 mJy 2023-7-26 19:14 UTC | 18.5 mJy | 4.4 mJy | 18.5 mJy | 4.9 mJy 2023-7-28 08:12 UTC | 1.7 mJy | 2.5 mJy | 1.8 mJy | 2.8 mJy The South Pole Telescope is a 10-meter telescope located at Amundsen-Scott South Pole Station and supported by the National Science Foundation and the US Dept. of Energy. The SPT online transient program providing data in this circular is supported by NSF grants AST-1716965 and OPP 1852617, and observes 1500 square degrees of the southern sky at 95, 150, and 220 GHz with an average revisit cadence of 12 hours. For more details on the SPT transient program and survey strategy, please see https://arxiv.org/abs/2103.06166.
GCN 34309 table
GRB_name GRB230723A
GCN_number 34309
Detection_method IPN Triangulation
Circular_text TITLE: GCN CIRCULAR NUMBER: 34309 SUBJECT: GRB 230723A: SPT-3G millimeter-band transient event inconsistent with IPN position DATE: 23/08/01 20:16:17 GMT FROM: Sam Guns at S Pole Telescope & UC Berkeley S. Guns (UC Berkeley) on behalf of the South Pole Telescope Collaboration: In light of the updated error box provided by IPN, the millimeter-band transient event reported by the South Pole Telescope in GCN #34301 is no longer spatially consistent with GRB 230723A (Fermi GBM, GCN #34232; IPN, GCN #34258). The event remains an unexplained, short-duration millimeter-band transient not obviously associated with any known galactic source.