TITLE:   GCN CIRCULAR
NUMBER:  44827
SUBJECT: GRB 260604C: MASTER OT J145749.59+284903.0 optical counterpart discovery
DATE:    26/06/04 22:45:21 GMT
FROM:    Vladimir Lipunov at Lomonosov Moscow State University <lipunov@sai.msu.ru>

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.