TITLE:   GCN CIRCULAR
NUMBER:  44501
SUBJECT: EP260507a: REM optical/NIR observations
DATE:    26/05/08 15:30:56 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 EP260507a, detected by EP (Fu et al., GCN 44488) with the REM 60 cm robotic telescope located at the ESO observatory of La Silla (Chile).                 
The observations were carried out in the g, r, i, z, and H bands, started on 2026-05-07 at 22:56:01 UT (i.e. 9.1 hr after the burst) and lasted for about 1 hour.

From preliminary photometry, we do not detect the optical/NIR counterpart (Corcoran et al., GCN Circ. 44489; Sankar et al., GCN Circ. 44490; Jiang et al., GCN Circ. 44491; Kumar et al., GCN Circ. 44492; Eyles-Ferris et al., GCN Circ. 44495; Jiang et al., GCN Circ. 44496; Li et al., GCN 44497; Globus et al., GCN 44498) down to the following 3sigma limits:

r > 19.8 (AB; calibrated against the Pan-STARRS catalogue),
 at a mid-time of 10.0 hr after the trigger;

H > 14.5 (Vega; calibrated against the 2MASS catalogue),
 at a mid-time of 9.2 hr after the trigger.