TITLE:   GCN CIRCULAR
NUMBER:  41006
SUBJECT: GRB 250706A: REM optical/NIR observations
DATE:    25/07/07 10:22:00 GMT
FROM:    Riccardo Brivio at INAF-OAB <riccardo.brivio@inaf.it>

R. Brivio, M. Ferro, P. D'Avanzo, S. Covino, D. Fugazza (INAF-OAB) report on behalf of the REM team:

We observed the field of GRB 250706A detected by Swift/BAT (Moss et al., GCN 40988) with the REM 60 cm robotic telescope located at the ESO observatory of La Silla (Chile). The observations were carried in the g, r, i, z, and H bands, started on 2025 July 07 at 06:21:07 UT (i.e. 14.5 hr after the burst), and lasted for about 1 hour.

From preliminary inspection, we do not detect any optical/NIR counterpart within the Swift/XRT error region down to the following 3sigma limits:

r > 19.8 (AB; calibrated against the Pan-STARRS catalogue),
at a mid-time of 15.1 hr after the trigger;

H > 15.3 (Vega; calibrated against the 2MASS catalogue),
at a mid-time of 14.6 hr after the trigger.