GRB240318A

This page lists all entries on GRB240318A in GRBweb

Summary Fermi GBM GCN 35949 GCN 35950 GCN 35959 GCN 35974

Summary table
Variable Value Source
GRB_name_Fermi GRB240318119
T0 2:51:01 UTC GCN_circulars,Fermi GBM final loc
ra 275.0700° Fermi_GBM
decl -4.9500° Fermi_GBM
pos_error 4.29e+00° Fermi_GBM
T90 8.384 s Fermi_GBM
T90_error 1.379 s Fermi_GBM
T90_start 2:51:01.435 UTC Fermi_GBM
fluence 2.08e-06 erg/cm² Fermi_GBM
fluence_error 3.38e-08 erg/cm² Fermi_GBM
T100 8.819 s
GBM_located True
mjd 60387.11876157407 GCN_circulars,Fermi GBM final loc
Fermi GBM table
GRB_name_Fermi GRB240318119
trigger_name bn240318119
ra 275.0700°
decl -4.9500°
pos_error 4.29e+00°
datum 2024-03-18
t_trigger 2:51:01.819 UTC
T90 8.384 s
T90_error 1.379 s
T90_start 2:51:01.435 UTC
fluence 2.08e-06 erg/cm²
fluence_error 3.38e-08 erg/cm²
flux_1024 4.53e+00 erg/cm²/s
flux_1024_error 2.54e-01 erg/cm²/s
flux_1024_time 1.09e+00 erg/cm²/s
flux_64 5.99e+00 erg/cm²/s
flux_64_error 1.18e+00 erg/cm²/s
GCN 35949 table
GRB_name GRB240318A
GCN_number 35949
Detection_method Fermi GBM final loc
t_trigger 2:51:01 UTC
ra 275.1000°
decl -5.0000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 35949 SUBJECT: GRB 240318A: Fermi GBM Final Real-time Localization DATE: 24/03/18 03:01:31 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 02:51:01 UT on 18 Mar 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240318A (trigger 732423066.81932 / 240318119). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 275.1, Dec = -5.0 (J2000 degrees, equivalent to J2000 18h 20m, -5d 00'), with a statistical uncertainty of 4.8 degrees. The angle from the Fermi LAT boresight is 53.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240318119/quicklook/glg_skymap_all_bn240318119.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240318119/quicklook/glg_healpix_all_bn240318119.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240318119/quicklook/glg_lc_medres34_bn240318119.gif
GCN 35950 table
GRB_name GRB240318A
GCN_number 35950
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 35950 SUBJECT: Fermi GRB 240318A: Global MASTER-Net observations report DATE: 24/03/18 03:30:37 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 240318A ( Fermi GBM team, GCN 35949) errorbox 45 sec after notice time and 77 sec after trigger time at 2024-03-18 02:52:19 UT, with upper limit up to 16.6 mag. Observations started at twilight. The observations began at zenith distance = 55 deg. The sun altitude is -11.1 deg. MASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 240318A errorbox 52 sec after notice time and 84 sec after trigger time at 2024-03-18 02:52:25 UT, with upper limit up to 17.6 mag. The observations began at zenith distance = 47 deg. The sun altitude is -23.4 deg. The galactic latitude b = 4 deg., longitude l = 25 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2401036 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 88 | 2024-03-18 02:52:19 | MASTER-Tavrida | (18h 47m 01.74s , -04d 52m 07.6s) | C | 20 | 16.5 | 94 | 2024-03-18 02:52:25 | MASTER-SAAO | (18h 42m 40.28s , -05d 38m 11.7s) | C | 20 | 17.5 | 94 | 2024-03-18 02:52:25 | MASTER-SAAO | (18h 40m 48.53s , -05d 24m 58.7s) | C | 20 | 17.4 | 117 | 2024-03-18 02:52:48 | MASTER-Tavrida | (18h 47m 05.23s , -04d 51m 08.3s) | C | 20 | 16.5 | 134 | 2024-03-18 02:53:05 | MASTER-SAAO | (18h 42m 40.33s , -05d 38m 08.3s) | C | 20 | 17.5 | 134 | 2024-03-18 02:53:05 | MASTER-SAAO | (18h 40m 48.53s , -05d 24m 54.8s) | C | 20 | 17.4 | 149 | 2024-03-18 02:53:16 | MASTER-Tavrida | (18h 46m 58.27s , -04d 51m 41.1s) | C | 30 | 16.6 | 178 | 2024-03-18 02:53:44 | MASTER-SAAO | (18h 42m 40.38s , -05d 38m 05.3s) | C | 30 | 17.6 | 178 | 2024-03-18 02:53:44 | MASTER-SAAO | (18h 40m 48.53s , -05d 24m 51.9s) | C | 30 | 17.6 | 187 | 2024-03-18 02:53:53 | MASTER-Tavrida | (18h 46m 58.14s , -04d 50m 44.1s) | C | 30 | 16.6 | 228 | 2024-03-18 02:54:29 | MASTER-Tavrida | (18h 47m 04.89s , -04d 51m 46.9s) | C | 40 | 16.6 | 232 | 2024-03-18 02:54:34 | MASTER-SAAO | (18h 42m 40.45s , -05d 38m 02.3s) | C | 40 | 17.6 | 232 | 2024-03-18 02:54:34 | MASTER-SAAO | (18h 40m 48.53s , -05d 24m 48.9s) | C | 40 | 17.6 | 282 | 2024-03-18 02:55:18 | MASTER-Tavrida | (18h 46m 57.52s , -04d 52m 50.5s) | C | 50 | 16.5 | 345 | 2024-03-18 02:56:16 | MASTER-Tavrida | (18h 47m 03.45s , -04d 52m 44.2s) | C | 60 | 16.5 | 648 | 2024-03-18 03:00:49 | MASTER-Tavrida | (18h 22m 27.68s , -04d 26m 36.6s) | C | 120 | 16.4 | 787 | 2024-03-18 03:02:59 | MASTER-Tavrida | (18h 22m 25.32s , -04d 25m 45.6s) | C | 140 | 16.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
GCN 35959 table
GRB_name GRB240318A
GCN_number 35959
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 35959 SUBJECT: GRB 240318A: Glowbug gamma-ray detection DATE: 24/03/18 19:01:13 GMT FROM: C.C. Cheung at Naval Research Lab C.C. Cheung, R. Woolf, M. Kerr, J.E. Grove (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge, D. Kocevski (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 240318A, which was also detected by Fermi/GBM (GCN 35949). Using an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2024-03-18 02:51:00.832 with a duration of 5.2 s and a total significance of about 14.4 sigma. The light curve comprises a single peak. Using a standard power-law function with an exponential high-energy cutoff [3] to model the emission over this duration results in a poorly constrained power-law index and a cutoff energy ("Epeak") of 163 keV. The modeled 10-10000 keV fluence is 7.6e-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 35974 table
GRB_name GRB240318A
GCN_number 35974
Detection_method Fermi GBM Det
t_trigger 2:51:01.820 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 35974 SUBJECT: GRB 240318A: Fermi GBM Observation DATE: 24/03/21 21:31:30 GMT FROM: Lorenzo Scotton at UAH L. Scotton (UAH) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 02:51:01.82 UT on 18 March 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240318A (trigger 732423066/240318119), which was also detected by Glowbug (Cheung et al. 2024, GCN 35959) and Swift/BAT-GUANO (DeLaunay et al. 2024, GCN 35969). The Fermi GBM Final Real-time Localization was provided in GCN 35949. The angle from the Fermi LAT boresight is 53 degrees. The GBM light curve consists of a single emission episode with a duration (T90) of about 8 s (50-300 keV). The time-averaged spectrum from T0-2.0 to T0+11.0 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.5 +/- 0.2 and the cutoff energy, parameterized as Epeak, is 112 +/- 8 keV. The event fluence (10-1000 keV) in this time interval is (2.1 +/- 0.1)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+1.1 s in the 10-1000 keV band is 4.5 +/- 0.3 ph/s/cm^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/"