GCN Circular 39567
Subject
EP250302a: REM NIR upper limits
Date
2025-03-03T10:11:26Z (6 days ago)
From
Riccardo Brivio at INAF-OAB <riccardo.brivio@inaf.it>
Via
Web form
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 EP250302a (Dai et al., GCN 39556) with the REM 60 cm robotic telescope located at the ESO observatory of La Silla (Chile). The observations were carried in the J, H, and K bands, started on 2025 March 03 at 02:15:53 UT (i.e. 10.66 hr after the burst), and lasted for about 1 hour.
From preliminary analysis, we do not find any counterpart at the position of the reported optical afterglow (Zhu et al., GCN 39550; Busmann et al., GCN 39551; Leonini et al., GCN 39553; Wu et al., GCN 39555; Xin et al., GCN 39558; Adami et al., GCN 39560; Yang et al., GCN 39561; Becerra et al., GCN 39562; Izzo et al., GCN 39564; Pankov et al., 39565) down to the following 3sigma limit:
H > 16.1 (Vega; calibrated against the 2MASS catalogue),
at a mid-time of 11.09 hours after the trigger.