GRB240306A

This page lists all entries on GRB240306A in GRBweb

Summary Fermi GBM GCN 35885 GCN 35889 GCN 35891 GCN 35892 GCN 35899

Summary table
Variable Value Source
GRB_name_Fermi GRB240306282
T0 6:45:49.185 UTC Fermi_GBM
ra 20.6100° Fermi_GBM
decl -41.9500° Fermi_GBM
pos_error 3.65e+00° Fermi_GBM
T90 8.96 s Fermi_GBM
T90_error 2.36 s Fermi_GBM
T90_start 6:45:49.185 UTC Fermi_GBM
fluence 3.19e-06 erg/cm² Fermi_GBM
fluence_error 7.16e-08 erg/cm² Fermi_GBM
T100 8.96 s
GBM_located True
mjd 60375.28181927084 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB240306282
trigger_name bn240306282
ra 20.6100°
decl -41.9500°
pos_error 3.65e+00°
datum 2024-03-06
t_trigger 6:45:50.209 UTC
T90 8.96 s
T90_error 2.36 s
T90_start 6:45:49.185 UTC
fluence 3.19e-06 erg/cm²
fluence_error 7.16e-08 erg/cm²
flux_1024 6.77e+00 erg/cm²/s
flux_1024_error 3.05e-01 erg/cm²/s
flux_1024_time 5.76e-01 erg/cm²/s
flux_64 9.94e+00 erg/cm²/s
flux_64_error 1.33e+00 erg/cm²/s
GCN 35885 table
GRB_name GRB240306A
GCN_number 35885
Detection_method Fermi GBM final loc
t_trigger 6:45:50 UTC
ra 20.6000°
decl -42.0000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 35885 SUBJECT: GRB 240306A: Fermi GBM Final Real-time Localization DATE: 24/03/06 06:56:45 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 06:45:50 UT on 6 Mar 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240306A (trigger 731400355.209016 / 240306282). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 20.6, Dec = -42.0 (J2000 degrees, equivalent to J2000 01h 22m, -42d 00'), with a statistical uncertainty of 3.9 degrees. The angle from the Fermi LAT boresight is 87.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240306282/quicklook/glg_skymap_all_bn240306282.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/bn240306282/quicklook/glg_healpix_all_bn240306282.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240306282/quicklook/glg_lc_medres34_bn240306282.gif
GCN 35889 table
GRB_name GRB240306A
GCN_number 35889
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 35889 SUBJECT: GRB 240306A: Swift/BAT-GUANO detection of a burst DATE: 24/03/06 17:04:09 GMT FROM: Tyler Parsotan at NASA GSFC Tyler Parsotan (NASA GSFC), James DeLaunay (PSU), Aaron Tohuvavohu (U Toronto), Samuele Ronchini (PSU), Gayathri Raman (PSU), Jamie A. Kennea (PSU) report: Swift/BAT did not localize GRB 240306A onboard (T0: 2024-03-06T06:45:49.58 UTC, Fermi/GBM trigger 731400355). The Fermi notice, 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 [-100,+100] 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), performed on the temporal window [T0-20 s, T0+20 s], detects the burst with a sqrt(TS) of 14 in a 2.048 s analysis time bin, starting at T0 + 0.512 s. NITRATES results, independently, are ambiguous with respect to whether this burst originates from in or outside the BAT coded FOV, with a DeltaLLHOut of 1.86. See Section 9.1 and Figures 10 and 17 in the NITRATES paper for brief descriptions and interpretation of sqrt(TS), DeltaLLHPeak, and DeltaLLHOut. 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://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.swift.psu.edu%2Fguano%2F&data=05%7C02%7Ccirculars%40gcn.nasa.gov%7C887a752fe810456574d308dc3dff6823%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C638453414370014126%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=9uFWgjFqiTq7UwRwDR3jCnnbjlNCgpcAfpIrKYtWGmc%3D&reserved=0
GCN 35891 table
GRB_name GRB240306A
GCN_number 35891
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 35891 SUBJECT: Fermi GRB 240306A: Global MASTER-Net observations report DATE: 24/03/06 19:30:53 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-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 240306A ( Fermi GBM team, GCN 35885) errorbox 41878 sec after notice time and 41910 sec after trigger time at 2024-03-06 18:24:20 UT, with upper limit up to 19.4 mag. Observations started at twilight. The observations began at zenith distance = 64 deg. The sun altitude is -16.8 deg. The galactic latitude b = -74 deg., longitude l = 280 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2392907 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 41941 | 2024-03-06 18:24:20 | MASTER-SAAO | (01h 23m 00.92s , -38d 48m 51.7s) | C | 60 | 12.3 | 42840 | 2024-03-06 18:39:19 | MASTER-SAAO | (01h 36m 10.23s , -42d 27m 04.8s) | C | 60 | 13.2 | 42840 | 2024-03-06 18:39:19 | MASTER-SAAO | (01h 42m 50.95s , -42d 39m 23.8s) | C | 60 | 15.1 | 42920 | 2024-03-06 18:40:39 | MASTER-SAAO | (01h 30m 42.38s , -38d 40m 29.4s) | C | 60 | 14.5 | 42920 | 2024-03-06 18:40:39 | MASTER-SAAO | (01h 37m 00.55s , -38d 52m 46.6s) | C | 60 | 13.7 | 42999 | 2024-03-06 18:41:59 | MASTER-SAAO | (01h 20m 49.84s , -46d 15m 01.5s) | C | 60 | 16.2 | 42999 | 2024-03-06 18:41:59 | MASTER-SAAO | (01h 27m 56.71s , -46d 27m 27.1s) | C | 60 | 15.7 | 43079 | 2024-03-06 18:43:19 | MASTER-SAAO | (00h 54m 49.20s , -42d 27m 18.8s) | C | 60 | 17.2 | 43079 | 2024-03-06 18:43:19 | MASTER-SAAO | (01h 01m 28.21s , -42d 39m 44.6s) | C | 60 | 15.0 | 43159 | 2024-03-06 18:44:38 | MASTER-SAAO | (01h 39m 17.93s , -44d 20m 50.7s) | C | 60 | 15.4 | 43159 | 2024-03-06 18:44:38 | MASTER-SAAO | (01h 46m 10.88s , -44d 33m 13.0s) | C | 60 | 15.3 | 43238 | 2024-03-06 18:45:58 | MASTER-SAAO | (00h 56m 45.33s , -44d 21m 16.1s) | C | 60 | 18.3 | 43238 | 2024-03-06 18:45:58 | MASTER-SAAO | (01h 03m 37.12s , -44d 33m 43.9s) | C | 60 | 18.3 | 43318 | 2024-03-06 18:47:18 | MASTER-SAAO | (00h 53m 11.03s , -40d 34m 12.1s) | C | 60 | 19.2 | 43318 | 2024-03-06 18:47:18 | MASTER-SAAO | (00h 59m 38.30s , -40d 46m 36.9s) | C | 60 | 19.4 | 43398 | 2024-03-06 18:48:38 | MASTER-SAAO | (01h 15m 34.39s , -42d 28m 26.0s) | C | 60 | 19.4 | 43398 | 2024-03-06 18:48:38 | MASTER-SAAO | (01h 22m 13.76s , -42d 40m 50.0s) | C | 60 | 19.3 | 43477 | 2024-03-06 18:49:57 | MASTER-SAAO | (01h 13m 16.50s , -40d 32m 48.9s) | C | 60 | 19.3 | 43477 | 2024-03-06 18:49:57 | MASTER-SAAO | (01h 19m 43.99s , -40d 45m 11.2s) | C | 60 | 19.3 | 43557 | 2024-03-06 18:51:17 | MASTER-SAAO | (01h 18m 00.60s , -44d 22m 20.9s) | C | 60 | 19.4 | 43557 | 2024-03-06 18:51:17 | MASTER-SAAO | (01h 24m 52.76s , -44d 34m 46.7s) | C | 60 | 19.4 | 43637 | 2024-03-06 18:52:37 | MASTER-SAAO | (01h 33m 22.27s , -40d 32m 35.9s) | C | 60 | 19.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
GCN 35892 table
GRB_name GRB240306A
GCN_number 35892
Detection_method AstroSat CZTI
Circular_text TITLE: GCN CIRCULAR NUMBER: 35892 SUBJECT: GRB 240306A: AstroSat CZTI detection DATE: 24/03/07 08:00:05 GMT FROM: Gaurav Waratkar at IIT Bombay J. Joshi (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a long-duration GRB 240306A which was also detected by Fermi-GBM (Fermi GBM team, GCN Circ. 35885), and Swift-BAT (Parsotan et al., GCN Circ. 35889). The source was clearly detected in the CZT detectors in the 20-200 keV energy range. The light curve peaks at 2024-03-06 06:45:51.65 UTC. The measured peak count rate associated with the burst is 256 (+160, -4) counts/s above the background in the combined data of all quadrants, with a total of 633 (+225, -236) counts. The local mean background count rate was 301 (+7, -9) counts/s. We caution that there is a 0.3 s readout dead time in CZTI data during the burst which affects the calculated total count rate. Using cumulative rates, we measure a T90 of 7.1 (+1.6, -2.4) s. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project. CZTI GRB detections are reported regularly on the payload site at: http://astrosat.iucaa.in/czti/?q=grb
GCN 35899 table
GRB_name GRB240306A
GCN_number 35899
Detection_method Fermi GBM Det
t_trigger 6:45:50.210 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 35899 SUBJECT: GRB 240306A: Fermi GBM observation DATE: 24/03/07 15:53:40 GMT FROM: Elisabetta Bissaldi at Politecnico and INFN Bari E. Bissaldi (Politecnico and INFN Bari) and C. Meegan (UAH) report on behalf of the Fermi GBM Team: "At 06:45:50.21 UT on 06 March 2024, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 240306A (trigger 731400355 / 240306282), which was also detected by the Swift/BAT GUANO (Parsotan et al. 2024, GCN 35889), AstroSat CZTI (Joshi et al. 2024, GCN 35892) and INTEGRAL SPI-ACS (trigger 10616). The GBM localization was reported in an earlier GCN (Fermi GBM Team, GCN 35885). The angle from the Fermi LAT boresight at the GBM trigger time is 87 degrees. The GBM light curve consists of single pulse with a duration (T90) of about 9 s (50-300 keV). The time-averaged spectrum from T0-1.7 s to T0+7.7 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.16 +/- 0.07 and the cutoff energy, parameterized as Epeak, is 135 +/- 12 keV. The event fluence (10-1000 keV) in this time interval is (3.15 +/- 0.14)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+0.6 s in the 10-1000 keV band is 6.8 +/- 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/"