GRB250510B

This page lists all entries on GRB250510B in GRBweb

Summary Fermi GBM GCN 40418 GCN 40419 GCN 40425 GCN 40427

Summary table
Variable Value Source
GRB_name_Fermi GRB250510279
T0 6:41:54.056 UTC Fermi_GBM
ra 128.4800° Fermi_GBM
decl -26.7600° Fermi_GBM
pos_error 3.87e+00° Fermi_GBM
T90 35.584 s Fermi_GBM
T90_error 7.748 s Fermi_GBM
T90_start 6:41:54.568 UTC Fermi_GBM
fluence 2.90e-06 erg/cm² Fermi_GBM
fluence_error 7.14e-08 erg/cm² Fermi_GBM
T100 36.096 s
GBM_located True
mjd 60805.27909787037 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB250510279
trigger_name bn250510279
ra 128.4800°
decl -26.7600°
pos_error 3.87e+00°
datum 2025-05-10
t_trigger 6:41:54.056 UTC
T90 35.584 s
T90_error 7.748 s
T90_start 6:41:54.568 UTC
fluence 2.90e-06 erg/cm²
fluence_error 7.14e-08 erg/cm²
flux_1024 2.44e+00 erg/cm²/s
flux_1024_error 2.24e-01 erg/cm²/s
flux_1024_time 2.05e+00 erg/cm²/s
flux_64 5.21e+00 erg/cm²/s
flux_64_error 1.38e+00 erg/cm²/s
GCN 40418 table
GRB_name GRB250510B
GCN_number 40418
Detection_method Fermi GBM Other
ra 128.9300°
decl -24.7600°
Circular_text TITLE: GCN CIRCULAR NUMBER: 40418 SUBJECT: GRB 250510B: Fermi GBM Final Localization DATE: 25/05/10 09:49:01 GMT FROM: A. Holzmann Airasca at University of Trento and INFN Bari The Fermi GBM team reports the detection of a likely LONG GRB "At 06:41:54.06 UT on 10 May 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250510B (trigger 768552119/250510279). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 128.93, Dec = -24.76 (J2000 degrees, equivalent to J2000 08h 35m, -24d 45'), with a statistical uncertainty of 2.39 degrees. The angle from the Fermi LAT boresight is 103 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250510279/quicklook/glg_skymap_all_bn250510279.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250510279/quicklook/glg_healpix_all_bn250510279.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250510279/quicklook/glg_lc_medres34_bn250510279.gif"
GCN 40419 table
GRB_name GRB250510B
GCN_number 40419
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 40419 SUBJECT: GRB 250510B: Swift/BAT-GUANO localization skymap of a burst DATE: 25/05/10 13:48:28 GMT FROM: Samuele Ronchini at PSU Samuele Ronchini (PSU), James DeLaunay (PSU), Aaron Tohuvavohu (Caltech), Gayathri Raman (PSU), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC) report: Swift/BAT did not localize GRB 250510B onboard (T0: 2025-05-10T06:41:54.06 UTC, Fermi GCN 40418) 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 11.67 in a 8.192 s analysis time bin, starting at T0 - 2.051 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 9,213 deg2 and the 50% credible area is 2,424 deg2. The integrated probability inside the coded field of view is 4%. The NITRATES skymap is consistent with the Fermi localization (GCN 40418). The combined Fermi/GBM+NITRATES 90% credible area is 550 deg2 and the 50% credible area is 116 deg2. A plot of the probability skymap can be viewed here: [skymap_plot](https://guano.swift.psu.edu/trigger_report?id=768552149/#:~:text=Probability%20Skymap) The probability skymap and joint skymap files can be downloaded from the links here [skymap_fits_file](https://guano.swift.psu.edu/files/768552149/0_n_PROBMAP) [joint_skymap_fits_file](https://guano.swift.psu.edu/files/768552149/0_n_JOINTMAP) 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=768552149 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 40425 table
GRB_name GRB250510B
GCN_number 40425
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 40425 SUBJECT: Fermi GRB 250510B: Global MASTER-Net observations report DATE: 25/05/11 01:31:12 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko, G.Antipov, A.Sankovich, Yu.Tselik, 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.Sosnovskij (CrAO), 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-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB 250510B ( Fermi GBM team, GCN 40418) errorbox 62438 sec after notice time and 62477 sec after trigger time at 2025-05-11 00:03:11 UT, with upper limit up to 19.0 mag. The observations began at zenith distance = 27 deg. The sun altitude is -28.5 deg. The galactic latitude b = 9 deg., longitude l = 250 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2866812 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 62497 | 2025-05-11 00:03:11 | MASTER-OAFA | (08h 43m 33.97s , -26d 38m 01.3s) | C | 40 | 17.5 | 62508 | 2025-05-11 00:03:11 | MASTER-OAFA | (08h 33m 17.64s , -26d 59m 17.6s) | C | 60 | 18.8 | 62575 | 2025-05-11 00:04:28 | MASTER-OAFA | (08h 51m 56.95s , -24d 43m 41.9s) | C | 40 | 17.6 | 62585 | 2025-05-11 00:04:29 | MASTER-OAFA | (08h 41m 50.32s , -25d 05m 00.8s) | C | 60 | 19.0 | 62653 | 2025-05-11 00:05:47 | MASTER-OAFA | (08h 35m 04.55s , -24d 42m 42.7s) | C | 40 | 17.6 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
GCN 40427 table
GRB_name GRB250510B
GCN_number 40427
Detection_method Fermi GBM Det
t_trigger 6:41:54.060 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 40427 SUBJECT: GRB 250510B: Fermi GBM Observation DATE: 25/05/11 05:33:44 GMT FROM: A. Holzmann Airasca at University of Trento and INFN Bari A. Holzmann Airasca (UniTrento and INFN Bari) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 06:41:54.06 UT on 10 May 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250510B (trigger 768552119/250510279). which was also detected by Swift/BAT-GUANO (S. Ronchini et al. 2025, GCN 40419). The Fermi GBM on-ground location is consistent with the Swift/BAT-GUANO position. The angle from the Fermi LAT boresight is 103 degrees. The GBM light curve consists of main emission episode with a duration (T90) of about 35 s (50-300 keV). The time-averaged spectrum from T0+0.51 to T0+35.58 s is best fit by a Band function with Epeak = 147 +/- 15 keV, alpha = 0.71 +/- 0.38, and beta = -2.79 +/- 0.49. The event fluence (10-1000 keV) in this time interval is (4.79 +/- 0.32)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+2.01 s in the 10-1000 keV band is 2.44 +/- 0.22 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/"