GRB 250214A
GCN Circular 39320
Subject
GRB 250214A: Fermi GBM Final Real-time Localization
Date
2025-02-14T05:42:39Z (3 months ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
Via
email
The Fermi GBM team reports the detection of a likely LONG GRB
At 05:32:07 UT on 14 Feb 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250214A (trigger 761203932.174936 / 250214231).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 122.8, Dec = -41.9 (J2000 degrees, equivalent to J2000 08h 11m, -41d 53'), with a statistical uncertainty of 5.3 degrees.
The angle from the Fermi LAT boresight is 122.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250214231/quicklook/glg_skymap_all_bn250214231.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/bn250214231/quicklook/glg_healpix_all_bn250214231.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250214231/quicklook/glg_lc_medres34_bn250214231.gif
GCN Circular 39322
Subject
Fermi GRB 250214A: Global MASTER-Net observations report
Date
2025-02-14T10:03:16Z (3 months ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
email
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-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 250214A ( Fermi GBM team, GCN 39320) errorbox 560 sec after notice time and 594 sec after trigger time at 2025-02-14 05:42:01 UT, with upper limit up to 19.1 mag. The observations began at zenith distance = 30 deg. The sun altitude is -44.1 deg.
The galactic latitude b = -4 deg., longitude l = 259 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2777807
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
644 | 2025-02-14 05:42:01 | MASTER-OAFA | (08h 23m 56.50s , -41d 11m 58.0s) | C | 100 | 18.2 |
655 | 2025-02-14 05:42:01 | MASTER-OAFA | (08h 11m 47.16s , -41d 33m 12.7s) | C | 120 | 19.1 |
781 | 2025-02-14 05:44:07 | MASTER-OAFA | (08h 23m 56.66s , -41d 11m 56.7s) | C | 120 | 18.3 |
791 | 2025-02-14 05:44:08 | MASTER-OAFA | (08h 11m 47.35s , -41d 33m 11.9s) | C | 140 | 19.1 |
942 | 2025-02-14 05:46:34 | MASTER-OAFA | (08h 23m 56.87s , -41d 11m 55.7s) | C | 150 | 18.3 |
952 | 2025-02-14 05:46:34 | MASTER-OAFA | (08h 11m 47.60s , -41d 33m 11.2s) | C | 170 | 19.0 |
1123 | 2025-02-14 05:49:30 | MASTER-OAFA | (08h 23m 57.07s , -41d 11m 55.2s) | C | 160 | 18.4 |
1133 | 2025-02-14 05:49:30 | MASTER-OAFA | (08h 11m 47.85s , -41d 33m 10.2s) | C | 180 | 18.8 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
GCN Circular 39490
Subject
GRB 250214A: SVOM/GRM observation
Date
2025-02-26T11:48:23Z (3 months ago)
From
zhengchao_astro@foxmail.com
Via
Web form
SVOM/GRM team: Chao Zheng, Shi-Jie Zheng, Shao-Lin Xiong, Yue Huang, Shuang-Nan Zhang (IHEP)
SVOM/ECLAIRs team: Frédéric Piron (LUPM), Nicolas Dagoneau (CEA), Maria-Grazia Bernardini (INAF-OAB), Jean-Luc Atteia (IRAP) report on behalf of the SVOM team:
SVOM/GRM detected GRB 250214A at 2025-02-14T05:32:06 UT (T0), which was also observed by Fermi/GBM (Fermi GBM team, GCN #39320).
With the event-by-event data downloaded through the X-band ground station, the GRM light curve shows that this burst consists of multi-pulses with a duration of about 6 seconds in the 15-600 keV band.
The SVOM/GRM light curve can be found here:
https://www.bursthub.cn//admin/static/svgrb250214A.png
The Space Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA, China), National Center for Space Studies (CNES, France) and the Chinese Academy of Sciences (CAS, China), which is dedicated to observing gamma-ray bursts and other transient phenomena in the energetic universe. GRM is developed by the Institute of High Energy Physics (IHEP) of CAS.
The SVOM/GRM point of contact for this burst is: Chao Zheng (IHEP) (zhengchao97@ihep.ac.cn)