GCN Circular 17881
Subject
GRB150527A: REM - NIR afterglow
Date
2015-05-27T18:21:19Z (9 years ago)
From
Eliana Palazzi at IASF/CNR,Bologna <palazzi@iasfbo.inaf.it>
L. Nicastro, E. Palazzi, A. Rossi (INAF/IASF Bologna), D. Fugazza (INAF/OAB) on
behalf of the REM team:
We observed the field of the GRB150527A (Evans et al., GCN 17874)
simultaneously in the optical (griz) and near infrared (H) bands with the 60-cm
robotic telescope REM at La Silla Observatory (Chile). The observations started
about 1 min after the GRB trigger.
An uncatalogued source in the enhanced XRT error box (Evans et al., GCN
17879) is detectedi, only in the H images, at the coordinates:
RA(J2000) = 19:15:50.31
DEC(J2000) = +04:12:06.1
Possibly this is the same source mentioned by Butler et al. (GCN 17876).
A very preliminary photometry, calibrated against 2MASS, indicates that
the object faded from H = 14.8 +/- 0.2 in the first image to H = 15.2 +/-
0.2 about 5 min later. Thus we identify this source as the NIR afterglow
of the burst.