TITLE:   GCN CIRCULAR
NUMBER:  15732
SUBJECT: GRB 140114A: RATIR Optical and NIR Afterglow Detection
DATE:    14/01/14 17:26:26 GMT
FROM:    Nat Butler at UC berkeley  <natxbutler@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
(ORAU/GSFC), 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 140114A (Troja et al., GCN 15728) 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 2014/01 14.50 to 2014/01 14.56 UTC (9.6 to
90.6 minutes after the BAT trigger), obtaining a total of 0.98 hours
exposure in the r and i bands and 0.43 hours exposure in the Z, Y, J, and H
bands.

For a source within the Swift-XRT error circle, in comparison with the SDSS
DR9 and 2MASS, we obtain the following detections:

  r     21.92 +/- 0.10
  i     21.31 +/- 0.07
  Z     21.14 +/- 0.12
  Y     20.75 +/- 0.15
  J     20.56 +/- 0.12
  H     20.28 +/- 0.15

These magnitudes are in the AB system and 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.