GRB 260514A
GCN Circular 44609
Subject
Fermi GRB 260514A: Global MASTER-Net observations report
Date
2026-05-14T11:15:36Z (15 days ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
email
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 [1] located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB 260514A ( Fermi GBM team, GCN 44604) errorbox 19843 sec after notice time and 19904 sec after trigger time at 2026-05-14 10:28:25 UT, with upper limit up to 17.1 mag. Observations started at twilight. The observations began at zenith distance = 71 deg. The sun altitude is -10.0 deg.
The galactic latitude b = 15 deg., longitude l = 334 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=3313250
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
19935 | 2026-05-14 10:28:25 | MASTER-OAFA | (15h 23m 20.52s , -37d 30m 31.8s) | C | 60 | 16.6 |
20013 | 2026-05-14 10:29:43 | MASTER-OAFA | (15h 23m 26.39s , -37d 31m 33.2s) | C | 60 | 17.1 |
20088 | 2026-05-14 10:30:58 | MASTER-OAFA | (15h 23m 19.45s , -39d 52m 36.3s) | C | 60 | 17.1 |
20165 | 2026-05-14 10:32:15 | MASTER-OAFA | (15h 23m 25.28s , -39d 52m 31.6s) | C | 60 | 17.1 |
20244 | 2026-05-14 10:33:34 | MASTER-OAFA | (15h 23m 24.08s , -34d 50m 45.0s) | C | 60 | 16.9 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
[1] - V.M. Lipunov, V.G. Kornilov, E.S. Gorbovskoy, N.A. Tiurina & A.S.Kuznetsov, 2023, Astronomical Robotic Networks and Operative Multichanel Astrophysics, Lomonosov MSU PRESS, 591pp.
http : // www.pereplet.ru/lipunov/625.html
GCN Circular 44604
Subject
GRB 260514A: Fermi GBM Final Real-time Localization
Date
2026-05-14T05:05:36Z (15 days 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 04:56:40 UT on 14 May 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260514A (trigger 800427405.55421 / 260514206).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 231.1, Dec = -37.7 (J2000 degrees, equivalent to J2000 15h 24m, -37d 42'), with a statistical uncertainty of 10.9 degrees.
The angle from the Fermi LAT boresight is 97.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260514206/quicklook/glg_skymap_all_bn260514206.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260514206/quicklook/glg_healpix_all_bn260514206.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260514206/quicklook/glg_lc_medres34_bn260514206.gif