[vsnet-grb-info 12718] GRB 121211A: RATIR Optical and NIR Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14077
SUBJECT: GRB 121211A: RATIR Optical and NIR Observations
DATE:    12/12/13 04:12:26 GMT
FROM:    Nat Butler at UC berkeley  <natxbutler at gmail.com>

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), 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 121211A (Mangano, et al., GCN 14057) 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 2012 Dec 12.48 to 2012 Dec
12.58 UTC (21.8 to 24.1 hours after the BAT trigger), obtaining a
total of 1.8 hours exposures in the r' and i' bands and 0.67 hours of
exposure in the Z, Y, J, and H bands.

In comparison with SDSS DR8 and 2MASS, we derive the following
detections and upper limits (3-sigma) in the AB magnitude system:

 r' 22.9 +/- 0.2
 i' 23.2 +/- 0.2
 Z  22.1 +/- 0.4
 Y  >21.3
 J  >21.9
 H  >21.1

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

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