GRB230913A

This page lists all entries on GRB230913A in GRBweb

Summary Fermi GBM IPN GCN 34680 GCN 34682 GCN 34683 GCN 34689 GCN 34696 GCN 34700

Summary table
Variable Value Source
GRB_name_Fermi GRB230913331
T0 7:56:09.604 UTC Fermi_GBM
ra 267.3458° IPN
decl 74.4833° IPN
pos_error 8.33e-02° IPN
T90 12.032 s Fermi_GBM
T90_error 2.187 s Fermi_GBM
T90_start 7:56:09.604 UTC Fermi_GBM
fluence 1.61e-06 erg/cm² Fermi_GBM
fluence_error 3.22e-08 erg/cm² Fermi_GBM
T100 12.032 s
GBM_located False
mjd 60200.330666712965 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB230913331
trigger_name bn230913331
ra 267.3492°
decl 74.4839°
pos_error 4.70e+00°
datum 2023-09-13
t_trigger 7:56:12.164 UTC
T90 12.032 s
T90_error 2.187 s
T90_start 7:56:09.604 UTC
fluence 1.61e-06 erg/cm²
fluence_error 3.22e-08 erg/cm²
flux_1024 2.05e+00 erg/cm²/s
flux_1024_error 1.80e-01 erg/cm²/s
flux_1024_time 1.34e+00 erg/cm²/s
flux_64 3.43e+00 erg/cm²/s
flux_64_error 8.85e-01 erg/cm²/s
IPN table
GRB_name GRB230913A
ra 267.3458°
decl 74.4833°
pos_error 8.33e-02°
GCN 34680 table
GRB_name GRB230913A
GCN_number 34680
Detection_method Fermi GBM final loc
t_trigger 7:56:12 UTC
ra 287.6000°
decl 78.9000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 34680 SUBJECT: GRB 230913A: Fermi GBM Final Real-time Localization DATE: 23/09/13 08:06:34 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 07:56:12 UT on 13 Sep 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230913A (trigger 716284577.16364 / 230913331). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 287.6, Dec = 78.9 (J2000 degrees, equivalent to J2000 19h 10m, 78d 54'), with a statistical uncertainty of 6.5 degrees. The angle from the Fermi LAT boresight is 41.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230913331/quicklook/glg_skymap_all_bn230913331.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230913331/quicklook/glg_healpix_all_bn230913331.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230913331/quicklook/glg_lc_medres34_bn230913331.gif
GCN 34682 table
GRB_name GRB230913A
GCN_number 34682
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 34682 SUBJECT: Fermi GRB 230913A: Global MASTER-Net observations report DATE: 23/09/13 11:30:45 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich (Blagoveschensk Educational State University) MASTER-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 230913A ( Fermi GBM team, GCN 34680) errorbox 12289 sec after notice time and 12299 sec after trigger time at 2023-09-13 11:21:12 UT, with upper limit up to 18.5 mag. Observations started at twilight. The observations began at zenith distance = 27 deg. The sun altitude is -14.7 deg. The galactic latitude b = 26 deg., longitude l = 111 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2269810 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 12330 | 2023-09-13 11:21:12 | MASTER-Amur | (19h 14m 13.35s , +77d 14m 05.4s) | C | 60 | 18.5 | 12411 | 2023-09-13 11:22:33 | MASTER-Amur | (19h 32m 21.13s , +76d 57m 30.6s) | C | 60 | 18.4 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
GCN 34683 table
GRB_name GRB230913A
GCN_number 34683
Detection_method Swift Other
ra 267.3490°
decl 74.4840°
Circular_text TITLE: GCN CIRCULAR NUMBER: 34683 SUBJECT: GRB 230913A: Swift/BAT-GUANO arcminute localization of a burst DATE: 23/09/13 13:55:53 GMT FROM: Samuele Ronchini at PSU Samuele Ronchini (PSU), Jamie A. Kennea (PSU), James DeLaunay (U Alabama), Aaron Tohuvavohu (U Toronto), Gayathri Raman (PSU), Tyler Parsotan (NASA GSFC) report: Swift/BAT did not localize GRB 230913A onboard (T0: 2023-09-13T07:56:12.16 UTC, Fermi/GBM GCN 34680, CALET trigger 1378626813). The Fermi and CALET notices, 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 200 seconds of BAT event-mode data from [-50,+150] 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 in a 8.192 s analysis time bin with a sqrt(TS) of 19.7. An arcminute localization is found with DeltaLLHOut of 64.99 and a DeltaLLHPeak of 60.07. See Section 9.1 and Figures 10 and 17 in the NITRATES paper for brief descriptions and interpretations of sqrt(TS), DeltaLLHPeak, and DeltaLLHOut. The BAT position is RA, Dec = 267.349, +74.484 deg (J2000) which is RA (J2000) 17h 49m 23.8s Dec (J2000) 74d 29m 2.4s with an estimated uncertainty of 5 arcmin radius. No XRT and UVOT follow-up can be done due to observational constraints. We strongly encourage follow-up from other telescopes. 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 34689 table
GRB_name GRB230913A
GCN_number 34689
Detection_method Fermi GBM Det
t_trigger 7:56:12.160 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 34689 SUBJECT: GRB 230913A: Fermi GBM Observation DATE: 23/09/13 21:26:08 GMT FROM: Sarah Dalessi at UAH S. Dalessi (UAH), R. Hamburg (CNRS/IJCLab), and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 07:56:12.16 UT on 13 September 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230913A (trigger 716284577/230913331). which was also detected by Swift/BAT GUANO (S. Ronchini et al. 2023, GCN 34683). The Fermi GBM Final Real-time Localization was reported in GCN 34680. The angle from the Fermi LAT boresight is 41 degrees. The GBM light curve single peak with a duration (T90) of about 12 s (50-300 keV). The time-averaged spectrum from T0-1.0 to T0+9.2 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.1 +/- 0.2 and the cutoff energy, parameterized as Epeak, is 160 +/- 10 keV. The event fluence (10-1000 keV) in this time interval is (3.1 +/- 0.3)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+1.3 s in the 10-1000 keV band is 2.1 +/- 0.2 ph/s/cm^2. A Band function fits the spectrum equally well with Epeak= 130 +/- 20 keV, alpha = 0.3 +/- 0.4 and beta = -2.3 +/- 0.2. 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 34696 table
GRB_name GRB230913A
GCN_number 34696
Detection_method CALET
Circular_text TITLE: GCN CIRCULAR NUMBER: 34696 SUBJECT: GRB 230913A: Glowbug gamma-ray detection DATE: 23/09/14 21:40:12 GMT FROM: matthew.kerr@gmail.com M. Kerr, C.C. Cheung, J. E. Grove, R. Woolf (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge (MSFC), and M.S. Briggs (UAH) report: The Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of GRB 230913A, which was also detected by Fermi/GBM, CALET, and Swift/BAT-GUANO (GCN 34680, 34683) Using an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2023-09-13 07:56:06.008 with a duration of 12.3 s and a total significance of about 22.2 sigma. 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=2.0 and a cutoff energy ("Epeak") of 152 keV. The modeled 10-10000 keV fluence is 7.7e-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 34700 table
GRB_name GRB230913A
GCN_number 34700
Detection_method CALET
Circular_text TITLE: GCN CIRCULAR NUMBER: 34700 SUBJECT: GRB 230913A: CALET Gamma-Ray Burst Monitor detection DATE: 23/09/15 03:21:21 GMT FROM: Yuta Kawakubo at Louisiana State University M. L. Cherry (LSU), A. Yoshida, T. Sakamoto, S. Sugita (AGU), Y. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA), Y. Asaoka (ICRR), S. Torii, Y. Akaike, K. Kobayashi (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC), S. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena), and the CALET collaboration: The long GRB 230913A (Fermi GBM Final Real-time Localization: Fermi GBM team, GCN Circ. 34680; Swift/BAT-GUANO arcminute localization, Ronchini et al., GCN Circ. 34683; Fermi GBM Observation: Dalessi et al., GCN Circ. 34689; Glowbug gamma-ray detection: Kerr et al., GCN Circ. 34696) triggered the CALET Gamma-ray Burst Monitor (CGBM) at 07:56:11.95 UTC on 13 September 2023 (http://cgbm.calet.jp/cgbm_trigger/flight/1378626813/index.html). The burst signal was seen by all CGBM detectors. The burst light curve shows a single pulse that starts at T+0.9 sec, peaks at T+1.5 sec, and ends at T+4.4 sec. The T90 and T50 durations measured by the SGM data are 3.1 +/- 0.3 sec and 1.9 +/- 0.4 sec (40-1000 keV), respectively. The ground-processed light curve is available at http://cgbm.calet.jp/cgbm_trigger/ground/1378626813/ The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at Waseda University.