GRB241209C

This page lists all entries on GRB241209C in GRBweb

Summary Fermi GBM GCN 38482 GCN 38490 GCN 38497 GCN 38501 GCN 38524

Summary table
Variable Value Source
GRB_name_Fermi GRB241209308
T0 7:22:52.292 UTC Fermi_GBM
ra 115.9900° Fermi_GBM
decl -0.9900° Fermi_GBM
pos_error 3.72e+00° Fermi_GBM
T90 10.752 s Fermi_GBM
T90_error 1.145 s Fermi_GBM
T90_start 7:22:52.292 UTC Fermi_GBM
fluence 3.57e-06 erg/cm² Fermi_GBM
fluence_error 1.83e-08 erg/cm² Fermi_GBM
T100 10.752 s
GBM_located True
mjd 60653.30754967593 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB241209308
trigger_name bn241209308
ra 115.9900°
decl -0.9900°
pos_error 3.72e+00°
datum 2024-12-09
t_trigger 7:22:54.596 UTC
T90 10.752 s
T90_error 1.145 s
T90_start 7:22:52.292 UTC
fluence 3.57e-06 erg/cm²
fluence_error 1.83e-08 erg/cm²
flux_1024 3.30e+00 erg/cm²/s
flux_1024_error 1.95e-01 erg/cm²/s
flux_1024_time 4.80e+00 erg/cm²/s
flux_64 5.26e+00 erg/cm²/s
flux_64_error 1.08e+00 erg/cm²/s
GCN 38482 table
GRB_name GRB241209C
GCN_number 38482
Detection_method Fermi GBM final loc
t_trigger 7:22:54 UTC
ra 116.0000°
decl -1.0000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 38482 SUBJECT: GRB 241209C: Fermi GBM Final Real-time Localization DATE: 24/12/09 07:33:23 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 07:22:54 UT on 9 Dec 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241209C (trigger 755421779.595806 / 241209308). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 116.0, Dec = -1.0 (J2000 degrees, equivalent to J2000 07h 44m, -1d 00'), with a statistical uncertainty of 4.2 degrees. The angle from the Fermi LAT boresight is 36.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241209308/quicklook/glg_skymap_all_bn241209308.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/bn241209308/quicklook/glg_healpix_all_bn241209308.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241209308/quicklook/glg_lc_medres34_bn241209308.gif
GCN 38490 table
GRB_name GRB241209C
GCN_number 38490
Detection_method AstroSat CZTI
Circular_text TITLE: GCN CIRCULAR NUMBER: 38490 SUBJECT: GRB 241209C: AstroSat CZTI detection DATE: 24/12/09 12:29:50 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 241209C which was also detected by Fermi/GBM (Fermi-GBM Team, GCN Circ. 38482). The source was clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve peaks at 2024-12-09 07:22:58.21 UTC. The measured peak count rate associated with the burst is 255 (+79, -35) counts/s above the background in the combined data of all quadrants, with a total of 1341 (+212, -365) counts. The local mean background count rate was 1635 (+16, -10) counts/s. We measure a T90 of 6.6 (+0.5, -0.9) s from the cumulative Veto light curve. 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 38497 table
GRB_name GRB241209C
GCN_number 38497
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 38497 SUBJECT: Fermi GRB 241209C: Global MASTER-Net observations report DATE: 24/12/09 19:30:49 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-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 241209C ( Fermi GBM team, GCN 38482) errorbox 41800 sec after notice time and 41825 sec after trigger time at 2024-12-09 18:59:59 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 76 deg. The sun altitude is -57.6 deg. The galactic latitude b = 12 deg., longitude l = 220 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2701134 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 41855 | 2024-12-09 18:59:59 | MASTER-Kislovodsk | (07h 45m 09.49s , -00d 33m 01.9s) | C | 60 | 16.5 | 41935 | 2024-12-09 19:01:19 | MASTER-Kislovodsk | (07h 53m 08.72s , -00d 32m 20.8s) | C | 60 | 16.9 | 42097 | 2024-12-09 19:04:01 | MASTER-Kislovodsk | (07h 45m 10.51s , -00d 34m 01.9s) | C | 60 | 17.3 | 42177 | 2024-12-09 19:05:21 | MASTER-Kislovodsk | (07h 53m 14.71s , -00d 34m 16.8s) | C | 60 | 16.9 | 42339 | 2024-12-09 19:08:03 | MASTER-Kislovodsk | (07h 45m 12.59s , -00d 33m 47.5s) | C | 60 | 16.8 | 42418 | 2024-12-09 19:09:22 | MASTER-Kislovodsk | (07h 29m 57.54s , -00d 32m 27.7s) | C | 60 | 17.3 | 42497 | 2024-12-09 19:10:42 | MASTER-Kislovodsk | (07h 37m 56.59s , -00d 31m 43.1s) | C | 60 | 17.5 | 42656 | 2024-12-09 19:13:21 | MASTER-Kislovodsk | (07h 37m 57.58s , -00d 33m 39.4s) | C | 60 | 17.5 | 42736 | 2024-12-09 19:14:40 | MASTER-Kislovodsk | (07h 30m 03.51s , -00d 33m 16.2s) | C | 60 | 17.3 | 42982 | 2024-12-09 19:18:46 | MASTER-Kislovodsk | (07h 53m 15.57s , -00d 32m 07.6s) | C | 60 | 16.9 | 43228 | 2024-12-09 19:22:52 | MASTER-Kislovodsk | (07h 53m 15.43s , -00d 32m 37.7s) | C | 60 | 16.8 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
GCN 38501 table
GRB_name GRB241209C
GCN_number 38501
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 38501 SUBJECT: GRB 241209C: Swift/BAT-GUANO localization skymap of a burst DATE: 24/12/09 21:29:41 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 241209C onboard (T0: 2024-12-09T07:22:54.60 UTC, Fermi trig 755421779) 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 24.5 in a 8.192 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. 2024. in prep) The 90% credible area is 920 deg2 and the 50% credible area is 298 deg2. The integrated probability inside the coded field of view is <1%. The NITRATES skymap is consistent with the Fermi localization reported in the final position notice (GCN 38482). The combined Fermi/GBM+NITRATES 90% credible area is 162 deg2 and the 50% credible area is 46 deg2. A plot of the probability skymap can be viewed here: [skymap_plot](https://guano.swift.psu.edu/trigger_report?id=755421809/#:~:text=Probability%20Skymap) The probability skymap file can be downloaded from the link here [skymap_fits_file](https://guano.swift.psu.edu/files/755421809/0_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=755421809 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 38524 table
GRB_name GRB241209C
GCN_number 38524
Detection_method Fermi GBM Det
t_trigger 7:22:54.600 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 38524 SUBJECT: GRB 241209C: Fermi GBM Observation DATE: 24/12/10 14:15:29 GMT FROM: Christian Malacaria at INAF-OAR C. Malacaria (INAF-OAR) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 07:22:54.60 UT on 09 December 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241209C (trigger 755421779/241209308), which was also detected by AstroSat (J. Joshi et al. 2024, GCN 38490) and Swift/BAT-GUANO (J. DeLaunay et al. 2024, GCN 38501). The GBM Final Real-time Localization is reported in GCN 38482. The angle from the Fermi LAT boresight is 36 degrees. The GBM light curve consists of a single emission episode with a duration (T90) of about 11 s (50-300 keV). The time-averaged spectrum from T0-4.1 to T0+9.2 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.4 +/- 0.1 and the cutoff energy, parameterized as Epeak, is 270 +/- 20 keV. The event fluence (10-1000 keV) in this time interval is (4 +/- 0.2)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+4.8 s in the 10-1000 keV band is 3.3 +/- 0.2 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/"