[vsnet-grb-info 13375] GRB 130527A: RATIR Optical and NIR Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14709
SUBJECT: GRB 130527A: RATIR Optical and NIR Observations
DATE:    13/05/28 16:17:12 GMT
FROM:    Nat Butler at Az State U  <natbutler at 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 (UCSC),
Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC),
José A. de Diego (UNAM), Leonid Georgiev (UNAM), Jesús González (UNAM),
Carlos Román-Zúñiga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC)
report:

We observed the field of GRB 130527A (Gompertz, et al., GCN 14703) with the
Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the
1.5m Harold Johnson Telescope at the Observatorio Astronómico Nacional on
Sierra San Pedro Mártir from 2013/05 28.35 to 2013/05 28.47 UTC (18.13 to
20.91 hours after the BAT trigger), obtaining a total of 1.97 hours
exposure in the r' and i' bands and 0.73 hours exposure in the Z, Y, J, and
H bands.


For a source within the Swift-XRT error circle (Evans, et al., GCN 14705),
in comparison with USNO-B1 and 2MASS, we obtain the following upper limits
(3-sigma):

  r'    > 21.9
  i'    > 22.3
  Z     > 20.7
  Y     > 20.6
  J     > 20.6
  H     > 20.3

These magnitudes are in the AB system and not corrected for Galactic
extinction in the direction of the GRB.

We thank the staff of the Observatorio Astronómico Nacional in San Pedro
Mártir.