GCN Circular 17876
Subject
GRB 150527A: RATIR Afterglow Detection
Date
2015-05-27T08:04:18Z (9 years ago)
From
Nat Butler at Az State U <natbutler@asu.edu>
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William
H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB),
J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara
(ORAU/GSFC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico
Ramirez-Ruiz (UCSC), Jos� A. de Diego (UNAM), Leonid Georgiev (UNAM), Jes�s
Gonz�lez (UNAM), Carlos Rom�n-Z��iga (UNAM), Neil Gehrels (GSFC), and
Harvey Moseley (GSFC) report:
We observed the field of GRB 150527A (Evans, et al., GCN 17874) with the
Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the
1.5m Harold Johnson Telescope at the Observatorio Astron�mico Nacional on
Sierra San Pedro M�rtir from 2015/05 27.29 to 2015/05 27.32 UTC (13.2 to
54.6 minutes after the BAT trigger), obtaining a total of 0.58 hours
exposure in the r, i, and z bands.
A source is detected within the Swift-XRT error circle. In comparison with
the USNO-B1 catalog, we obtain the following detections and upper limit
(3-sigma):
r 21.17 +/- 0.10
i 20.83 +/- 0.14
z > 19.50
These magnitudes are in the AB system and are not corrected for Galactic
extinction in the direction of the GRB. Additional observations are
ongoing.
We thank the staff of the Observatorio Astron�mico Nacional in San Pedro
M�rtir.