GRB241226A

This page lists all entries on GRB241226A in GRBweb

Summary Fermi GBM GCN 38674 GCN 38675 GCN 38690

Summary table
Variable Value Source
GRB_name_Fermi GRB241226940
T0 22:33:39 UTC GCN_circulars,Fermi GBM final loc
ra 79.2000° Fermi_GBM
decl 5.9700° Fermi_GBM
pos_error 6.48e+00° Fermi_GBM
T90 87.041 s Fermi_GBM
T90_error 3.665 s Fermi_GBM
T90_start 22:33:42.992 UTC Fermi_GBM
fluence 6.14e-06 erg/cm² Fermi_GBM
fluence_error 1.06e-07 erg/cm² Fermi_GBM
T100 91.033 s
GBM_located True
mjd 60670.940034722225 GCN_circulars,Fermi GBM final loc
Fermi GBM table
GRB_name_Fermi GRB241226940
trigger_name bn241226940
ra 79.2000°
decl 5.9700°
pos_error 6.48e+00°
datum 2024-12-26
t_trigger 22:33:39.664 UTC
T90 87.041 s
T90_error 3.665 s
T90_start 22:33:42.992 UTC
fluence 6.14e-06 erg/cm²
fluence_error 1.06e-07 erg/cm²
flux_1024 1.65e+00 erg/cm²/s
flux_1024_error 1.65e-01 erg/cm²/s
flux_1024_time 2.25e+01 erg/cm²/s
flux_64 3.54e+00 erg/cm²/s
flux_64_error 1.03e+00 erg/cm²/s
GCN 38674 table
GRB_name GRB241226A
GCN_number 38674
Detection_method Fermi GBM final loc
t_trigger 22:33:39 UTC
ra 79.2000°
decl 6.0000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 38674 SUBJECT: GRB 241226A: Fermi GBM Final Real-time Localization DATE: 24/12/26 22:44:18 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 22:33:39 UT on 26 Dec 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241226A (trigger 756945224.664144 / 241226940). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 79.2, Dec = 6.0 (J2000 degrees, equivalent to J2000 05h 16m, 6d 00'), with a statistical uncertainty of 6.8 degrees. The angle from the Fermi LAT boresight is 73.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241226940/quicklook/glg_skymap_all_bn241226940.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/bn241226940/quicklook/glg_healpix_all_bn241226940.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241226940/quicklook/glg_lc_medres34_bn241226940.gif
GCN 38675 table
GRB_name GRB241226A
GCN_number 38675
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 38675 SUBJECT: Fermi GRB 241226A: Global MASTER-Net observations report DATE: 24/12/27 01:01:29 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V.Lipunov, E.Gorbovskoy, N.Tiurina, P.Balanutsa, , D.Vlasenko, I.Panchenko, A.Kuznetsov, G.Antipov, A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU), O.Gress, N.Budnev (ISU), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity) D.Buckley (SAAO), R.Rebolo (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) 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 241226A ( Fermi GBM team, GCN 38674) errorbox 739 sec after notice time and 779 sec after trigger time at 2024-12-26 22:46:39 UT, with upper limit up to 19.3 mag. The observations began at zenith distance = 42 deg. The sun altitude is -34.6 deg. The galactic latitude b = -17 deg., longitude l = 196 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2723414 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 809 | 2024-12-26 22:46:39 | MASTER-SAAO | (05h 16m 55.09s , +06d 41m 59.3s) | C | 60 | 18.9 | 1088 | 2024-12-26 22:51:17 | MASTER-SAAO | (05h 25m 02.50s , +06d 42m 29.7s) | C | 60 | 18.9 | 1508 | 2024-12-26 22:58:18 | MASTER-SAAO | (05h 16m 58.65s , +06d 40m 57.5s) | C | 60 | 18.8 | 1588 | 2024-12-26 22:59:37 | MASTER-SAAO | (05h 15m 51.46s , +04d 47m 02.0s) | C | 60 | 19.1 | 1667 | 2024-12-26 23:00:56 | MASTER-SAAO | (05h 23m 55.34s , +04d 48m 51.0s) | C | 60 | 19.1 | 1749 | 2024-12-26 23:02:18 | MASTER-SAAO | (05h 24m 55.24s , +06d 42m 08.0s) | C | 60 | 19.2 | 2168 | 2024-12-26 23:09:17 | MASTER-SAAO | (05h 16m 55.62s , +06d 42m 52.8s) | C | 60 | 19.0 | 2247 | 2024-12-26 23:10:37 | MASTER-SAAO | (05h 15m 51.16s , +04d 47m 34.1s) | C | 60 | 19.2 | 2327 | 2024-12-26 23:11:56 | MASTER-SAAO | (05h 23m 55.37s , +04d 49m 20.3s) | C | 60 | 19.2 | 2406 | 2024-12-26 23:13:15 | MASTER-SAAO | (05h 24m 57.26s , +06d 42m 31.6s) | C | 60 | 19.3 | 2825 | 2024-12-26 23:20:14 | MASTER-SAAO | (05h 16m 54.46s , +06d 43m 25.1s) | C | 60 | 19.0 | 2904 | 2024-12-26 23:21:33 | MASTER-SAAO | (05h 15m 49.72s , +04d 47m 59.5s) | C | 60 | 18.9 | 2984 | 2024-12-26 23:22:53 | MASTER-SAAO | (05h 23m 54.50s , +04d 49m 40.3s) | C | 60 | 19.2 | 3063 | 2024-12-26 23:24:13 | MASTER-SAAO | (05h 24m 54.98s , +06d 42m 55.6s) | C | 60 | 19.0 | 6284 | 2024-12-27 00:17:53 | MASTER-SAAO | (05h 01m 18.02s , +06d 44m 53.0s) | C | 60 | 18.9 | 6547 | 2024-12-27 00:22:16 | MASTER-SAAO | (05h 16m 39.60s , +06d 44m 03.0s) | C | 60 | 18.8 | 6626 | 2024-12-27 00:23:35 | MASTER-SAAO | (05h 15m 39.99s , +04d 50m 13.3s) | C | 60 | 18.9 | 6705 | 2024-12-27 00:24:54 | MASTER-SAAO | (05h 23m 39.63s , +04d 51m 50.4s) | C | 60 | 18.2 | 6784 | 2024-12-27 00:26:14 | MASTER-SAAO | (05h 24m 46.30s , +06d 44m 30.7s) | C | 60 | 19.0 | 6864 | 2024-12-27 00:27:33 | MASTER-SAAO | (05h 09m 27.76s , +06d 46m 15.6s) | C | 60 | 19.1 | 6943 | 2024-12-27 00:28:53 | MASTER-SAAO | (05h 01m 17.79s , +06d 45m 27.7s) | C | 60 | 18.9 | 7023 | 2024-12-27 00:30:12 | MASTER-SAAO | (05h 14m 54.59s , +02d 57m 23.8s) | C | 60 | 18.8 | 7102 | 2024-12-27 00:31:31 | MASTER-SAAO | (05h 22m 50.49s , +02d 56m 25.5s) | C | 60 | 19.0 | 7182 | 2024-12-27 00:32:51 | MASTER-SAAO | (05h 00m 17.40s , +04d 52m 04.7s) | C | 60 | 19.0 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
GCN 38690 table
GRB_name GRB241226A
GCN_number 38690
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 38690 SUBJECT: GRB 241226A: Swift/BAT-GUANO localization skymap of a burst DATE: 24/12/28 16:27:08 GMT FROM: Jimmy DeLaunay at Penn State James DeLaunay (PSU), Samuele Ronchini (PSU), Aaron Tohuvavohu (Caltech), Gayathri Raman (PSU), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC) report: Swift/BAT did not localize GRB 241226A onboard (T0: 2024-12-26T22:33:39.66 UTC, Fermi trig 756945224) 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 [-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), performed on the temporal window [T0-20 s, T0+20 s], detects the burst with a sqrt(TS) of 10.0 in a 16.384 s analysis time bin, starting at T0 + 0.0 s. Using the NITRATES analysis, parameter estimation was performed to obtain the localization of this burst in the form of a HEALPIX Multi-Order Coverage (MOC) skymap. This localization accounts for both statistical and systematic errors. More details in the creation and calibration of these maps will soon be published (DeLaunay et al. 2025. in prep) The 90% credible area is 14,391 deg2 and the 50% credible area is 4,190 deg2. The integrated probability inside the coded field of view is 2%. The NITRATES skymap is consistent with the Fermi localization reported in the final position notice (GCN 38674). A plot of the probability skymap can be viewed here: [skymap_plot](https://guano.swift.psu.edu/trigger_report?id=756945254/#:~:text=Probability%20Skymap) The probability skymap file can be downloaded from the link here [skymap_fits_file](https://guano.swift.psu.edu/files/756945254/0_n_PROBMAP) Instructions on how to read and manipulate this map can be found here: https://guano.swift.psu.edu/documentation More details about this burst can be found on the trigger report page here: https://guano.swift.psu.edu/trigger_report?id=756945254 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/