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GCN Circular 18916

Subject
GRB 160117B: RATIR continued observations
Date
2016-01-21T17:11:22Z (8 years ago)
From
Antonino Cucchiara at NASA/GSFC <antonino.cucchiara@nasa.gov>
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 continued observing the field of GRB 160117B with the
Reionization and Transients Infrared Camera (RATIR; www.ratir.org <http://www.ratir.org/>) on the
1.5m Harold Johnson Telescope at the Observatorio Astron��mico Nacional on
Sierra San Pedro M��rtir from 2016/01 21.17 to 2016/01 21.51 UTC (86.20
to 94.28 hours after the BAT trigger), obtaining a total of 6.26 hours
exposure in the r and i bands.


The optical afterglow is still detected and in comparison with the USNO-B1 
catalog, we obtain the following detections:


  r	22.91 +/- 0.17
  i	22.39 +/- 0.10
  

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.

[GCN OPS NOTE(21jan16): The GRB name in the Subject-line was corrected
"16017" --> "160117".]
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