GRB221023A

This page lists all entries on GRB221023A in GRBweb

Summary Fermi GBM IPN GCN 32825 GCN 32826 GCN 32831 GCN 32845 GCN 32849 GCN 32856

Summary table
Variable Value Source
GRB_name_Fermi GRB221023862
T0 20:41:32.216 UTC GCN_circulars,Konus-Wind Det
ra 230.2958° IPN
decl 15.0000° IPN
pos_error 5.00e-02° IPN
T90 39.169 s Fermi_GBM
T90_error 0.724 s Fermi_GBM
T90_start 20:41:38.059 UTC Fermi_GBM
fluence 3.41e-04 erg/cm² Fermi_GBM
fluence_error 1.05e-07 erg/cm² Fermi_GBM
T100 45.012 s
GBM_located False
mjd 59875.86217842592 GCN_circulars,Konus-Wind Det
Fermi GBM table
GRB_name_Fermi GRB221023862
trigger_name bn221023862
ra 230.3000°
decl 15.0100°
datum 2022-10-23
t_trigger 20:41:34.923 UTC
T90 39.169 s
T90_error 0.724 s
T90_start 20:41:38.059 UTC
fluence 3.41e-04 erg/cm²
fluence_error 1.05e-07 erg/cm²
flux_1024 6.09e+01 erg/cm²/s
flux_1024_error 4.35e-01 erg/cm²/s
flux_1024_time 2.03e+01 erg/cm²/s
flux_64 6.79e+01 erg/cm²/s
flux_64_error 1.81e+00 erg/cm²/s
IPN table
GRB_name GRB221023A
ra 230.2958°
decl 15.0000°
pos_error 5.00e-02°
GCN 32825 table
GRB_name GRB221023A
GCN_number 32825
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 32825 SUBJECT: GRB 221023A: AGILE detection of a burst DATE: 22/10/24 07:33:58 GMT FROM: Alessandro Ursi at INAF/IAPS A. Ursi (INAF/IAPS), C. Pittori, F. Verrecchia (SSDC, and INAF/OAR), C. Casentini (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), A. Argan, M. Cardillo, Y. Evangelista, L. Foffano, E. Menegoni, G. Piano (INAF/IAPS), A. Bulgarelli, A. Di Piano, V. Fioretti, G. Panebianco, N. Parmiggiani (INAF/OAS-Bologna), F. Lucarelli (SSDC, and INAF/OAR), M. Romani (INAF/OA-Brera), M. Marisaldi (INAF/OAS-Bologna, and Bergen University), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), A. Giuliani (INAF/IASF-Mi), F. Longo (Univ. Trieste and INFN Trieste), and P. Tempesta (TeleSpazio), report on behalf of the AGILE Team: The AGILE satellite detected a burst at T0 = 2022-10-23 20:41:34 s (UTC). 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 35 s and it released a total number of 115660 counts in the MCAL detector (above a background rate of 1120 Hz), and 251030 counts in the AC detector (above a background rate of 3010 Hz). The AGILE ratemeters light curves can be found at http://www.agilescienceapp.it/notices/GRB221023A_AGILE_RM.png . The event also triggered a partial high time resolution MCAL data acquisition, from T0+23.34 s to T0+33.35 s (UTC), and released 18196 counts in the detector, above a background rate of 590 Hz. The MCAL light curve can be found at http://www.agilescienceapp.it/notices/GRB221023A_080618_593642494.000000.png . 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 32826 table
GRB_name GRB221023A
GCN_number 32826
Detection_method Fermi GBM Other
ra 232.3000°
decl 11.8000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 32826 SUBJECT: GRB 221023A: Fermi GBM Final Localization DATE: 22/10/24 13:22:51 GMT FROM: Rachel Dunwoody at UCD The Fermi GBM team reports the detection of a likely long GRB At 20:41:34.92 UT on 23 October 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 221023A (trigger 688250499 / 221023862). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 232.3, Dec = 11.8 (J2000 degrees, equivalent to J2000 15h 29m, 11d 48'), with a statistical uncertainty of 1 degree. The angle from the Fermi LAT boresight is 52 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221023862/quicklook/glg_skymap_all_221023862.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221023862/quicklook/glg_healpix_all_bn221023862.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221023862/quicklook/glg_lc_medres34_bn221023862.gif
GCN 32831 table
GRB_name GRB221023A
GCN_number 32831
Detection_method Fermi LAT Det
t_trigger 20:41:34.920 UTC
ra 230.3000°
decl 15.0100°
Circular_text TITLE: GCN CIRCULAR NUMBER: 32831 SUBJECT: GRB 221023A: Fermi-LAT detection DATE: 22/10/24 18:07:50 GMT FROM: Roberta Pillera at Politecnico and INFN Bari GRB 221023A: Fermi-LAT detection Pillera R. (Politecnico and INFN Bari), Cutini S. (INFN Perugia), Maheso D. (Johannesburg Univ.), Cheung C. C. (Naval Research Laboratory), Bissaldi E. (Politecnico and INFN Bari), Di Lalla N. (Stanford Univ.) and Khalil T. (Johannesburg Univ.) report on behalf of the Fermi-LAT team: At 20:41:34.92 on October, 23, 2022 Fermi-LAT detected high-energy emission from GRB 221023A, which was reported by AGILE (Ursi et al. GCN 32825) and GBM (GBM team 32826). The best LAT on-ground location is found to be RA, Dec = 230.30, 15.01 (J2000) with an error radius of 0.04 deg (90 % containment, statistical error only). This was 48 deg from the LAT boresight at the time of the trigger. The data from the Fermi-LAT show a significant increase in the event rate that is spatially and temporally correlated with the trigger with high significance. The 100 MeV - 1 GeV photon flux in the time interval 0-1600 s after the GBM trigger is (7.0 +/- 0.3)E-05 ph/cm2/s. The estimated photon index above 100 MeV is -2.25 +/- 0.05. The highest-energy photon is a 17 GeV event with 99% probability which is observed 576 seconds after the GBM trigger. A Swift ToO has been requested for this burst. The Fermi-LAT point of contact for this burst is Dimakatso Jeannett Maheso (d.j.maheso@gmail.com). The Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.
GCN 32845 table
GRB_name GRB221023A
GCN_number 32845
Detection_method Fermi GBM Det
t_trigger 20:41:34.920 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 32845 SUBJECT: GRB 221023A: Fermi GBM Observation DATE: 22/10/25 14:16:07 GMT FROM: Rachel Dunwoody at UCD R. Dunwoody (UCD), J. Mangan (UCD) and C. Meegan (UAH), report on behalf of the Fermi GBM Team: "At 20:41:34.92 UT on 23 October 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 221023A (trigger 688250499 / 221023862), this localisation was consistent with the Fermi LAT (GCN 32813). This event was also observed by AGILE (GCN 32825). The angle from the Fermi LAT boresight is 48 degrees. The GBM light curve shows one bright peak with a duration (T90) of about 39 s (50-300 keV). The time-averaged spectrum from T0-2 to T0+58 s is best fit by a Band function with Epeak = 898 +/- 15 keV, alpha = -1.1 +/- 0.004, and beta = -2.5 +/- 0.03. It is fit equally well with a power law function with an exponential high-energy cutoff. The power law index is -1.08 +/- 0.003 and the cutoff energy, parameterized as Epeak, is 997 +/- 14 keV. The event fluence (10-1000 keV) in this time interval is 0.001 +/- 4.350E-06 erg/cm2. The 1-sec peak photon flux measured starting from T0+20 s in the 10-1000 keV band is 60.9 +/- 0.4 ph/s/cm2. 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 32849 table
GRB_name GRB221023A
GCN_number 32849
Detection_method Konus-Wind Det
t_trigger 20:41:32.216 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 32849 SUBJECT: Konus-Wind detection of GRB 221023A DATE: 22/10/25 15:49:28 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 long-duration GRB 221023A (AGILE detection: Ursi et al., GCN 32825; Fermi-GBM observation: Fermi GBM team, GCN 32826; Dunwoody et al., GCN 32845; Fermi-LAT detection: Pillera et al., GCN 32831) triggered Konus-Wind at T0=74492.216 s UT (20:41:32.216). The burst light curve shows a multipeaked structure, which starts at ~T0-0.5 s and has a total duration of ~145.9 s. The emission is seen up to ~10 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB221023_T74492/ As observed by Konus-Wind, the burst had a fluence of 6.60(-0.35,+0.35)x10^-4 erg/cm2, and a 64-ms peak flux, measured from T0+18.928 s, of 3.84(-0.52,+0.52)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-averaged spectrum of the burst (measured from T0 to T0+149.248 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -1.05(-0.03,+0.03), the high energy photon index beta = -2.27(-0.17,+0.13), the peak energy Ep = 760(-64,+68) keV (chi2 = 128/98 dof). The spectrum near the maximum count rate (measured from T0+18.688 to T0+19.200 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.66(-0.12,+0.15), the high energy photon index beta = -2.32(-0.41,+0.22), the peak energy Ep = 707(-147,+184) keV (chi2 = 47/55 dof). All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.
GCN 32856 table
GRB_name GRB221023A
GCN_number 32856
Detection_method Konus-Wind Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 32856 SUBJECT: GRB 221023A: AGILE/GRID analysis DATE: 22/10/26 15:16:15 GMT FROM: Francesco Verrecchia at SSDC,INAF-OAR F. Verrecchia (SSDC, and INAF/OAR), C. Pittori (SSDC, and INAF/OAR) A. Ursi (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), C. Casentini (INAF/IAPS), A. Giuliani (INAF/IASF-Mi), F. Longo (Univ. Trieste and INFN Trieste), L. Foffano (INAF/IAPS), F. Lucarelli (SSDC, and INAF/OAR), M. Romani(INAF/OA-Brera), G. Piano, A. Argan, M. Cardillo, Y. Evangelista, E. Menegoni (INAF/IAPS), A. Bulgarelli, A. Di Piano, V. Fioretti, G. Panebianco, N. Parmiggiani (INAF/OAS), M. Marisaldi (INAF/OAS, and Bergen University), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), and P. Tempesta (TeleSpazio), report on behalf of the AGILE Team: The Gamma-Ray Imaging Detector (GRID) of AGILE detected gamma-ray transient emission consistent with the long GRB 221023A reported by AGILE/MCAL (GCN #32825) at T0 = 2022-10-23 20:41:34 s (UTC), also detected by Fermi/GBM (GCN #32826, #32845), Fermi/LAT (GCN #82831) and Konus-Wind (GCN #32849). A refined AGILE/GRID data analysis in the energy range 30 MeV - 10 GeV shows a detection with a statistical significance of about 4.3 sigma overa time integration of 50 s starting at the T0 of GRB 221023A, at a sky position with Galactic coordinates l=28 deg, b=53 deg, with and an error radius of 4 deg (90% statistical + systematic error; R.A.= 232 deg, Decl.= 19 deg (J2000)). The GRID error circle includes the LAT position. During the 120s integration, we detected a total of 22 events (11 background events estimated through a Li&Ma analysis), 16 events at energies above 100 MeV, and 2 events above 1 GeV. These measurements were obtained with AGILE observing a large portion of the sky in spinning mode. Additional analysis of AGILE data is in progress.