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GCN Circular 17018

Subject

GRB 141031B: RATIR Optical and NIR Observation

Date

2014-11-01T16:05:34Z (10 years ago)

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), 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 141031B (Gompertz, et al., GCN 16998Not found
 
 
) 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 2014/11 1.10 to 2014/11 1.11 UTC (11.34 to
11.75 hours after the BAT trigger), obtaining a total of 0.36 hours
exposure in the r, i, and z bands.

For a source within the enhanced Swift-XRT error circle (Goad, et al., GCN
17009Not found
 
 
), in comparison with the SDSS DR9, we obtain the following upper
limits (3-sigma):

  r > 22.98
  i > 22.81
  z > 19.91

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 Astron��mico Nacional in San Pedro
M��rtir.