GCN Circular 44827
Subject
GRB 260604C: MASTER OT J145749.59+284903.0 optical counterpart discovery
Event
Date
2026-06-04T22:45:21Z (2 days ago)
From
Vladimir Lipunov at Lomonosov Moscow State University <lipunov@sai.msu.ru>
Via
Web form
MASTER OT J145749.59+284903.0 discovery
MASTER-Tavrida auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 14h 57m 49.59s +28d 49m 03.0s on 2026-06-04.86020 UT.
The OT magnitude (unfiltered) is 17.5m at04.86020UT (mlim=19.4).
The OT is seen in 14 images. There is no minor planet at this place.
We have reference image on 2020-09-17.71399 UT with unfiltered mlim= 18.1m.
Spectral observations are required.