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GCN Circular 18900

GRB 160117B: RATIR Optical and NIR Observations
2016-01-19T16:12:22Z (8 years ago)
Antonino Cucchiara at NASA/GSFC <>
Antonino Cucchiara(GSFC/STScI),Nat Butler (ASU), Alan M. Watson (UNAM), 
Alexander Kutyrev (GSFC),William H. Lee (UNAM), Michael G. Richer (UNAM), 
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), Harvey Moseley (GSFC), 
John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD) report:

We observed the field of GRB 160117B (Sonbas et al., GCN 18875) 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 2016/01 19.19 to 2016/01 19.36 UTC (38.57
to 42.63 hours after the BAT trigger), obtaining a total of 2.76 hours
exposure in the r, i, and z bands.

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

  r	> 23.57
  i	> 23.55
  z	> 19.97

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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