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GCN Circular 15381

GRB 131024B: RATIR Optical and NIR Observations
2013-10-25T15:45:15Z (11 years ago)
Antonino Cucchiara at UCSC/UCO Lick <>
Antonino Cucchiara (ORAU/GSFC), 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), 
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 131024B (Krimm, et al., GCN 15371) with the
Reionization and Transients Infrared Camera (RATIR; on the
1.5m Harold Johnson Telescope at the Observatorio Astron�mico Nacional on
Sierra San Pedro M�rtir from 2013/10 25.41 to 2013/10 25.52 UTC (12.28
to 14.87 hours after the BAT trigger), obtaining a total of 1.78 hours
exposure in the r and i bands and 0.74 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 upper limits (3-sigma):

  r	> 23.68
  i	> 23.35
  Z	> 22.44
  Y	> 22.01
  J	> 21.75
  H	> 21.49

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 
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