[vsnet-grb-info 17576] GRB 160203A: RATIR Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19007
SUBJECT: GRB 160203A: RATIR Upper Limits
DATE:    16/02/10 02:40:34 GMT
FROM:    V. Zach Golkhou at ASU/RATIR  <golkhou at gmail.com>

V. Zach Golkhou (ASU), Nat Butler (ASU), Alan M. Watson (UNAM), Alexander
Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox
(STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara
(GSFC/STScI), 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), Harvey
Moseley (GSFC), John Capone (UMD), and Vicki Toy (UMD) report:

We observed the field of GRB 160203A (D'Avanzo, et al., GCN 18979) 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 2016/02 6.28 to 2016/02 6.52 UTC (76.40 to
82.32 hours after the BAT trigger), obtaining a total of 4.27
hours exposure in the r, i, and z bands.

For a source within the Swift-XRT error circle (Osborne, et al.,
GCN 18983), in comparison with the USNO-B1 and 2MASS catalogs, we obtain
the following upper limits (3-sigma):

r    >  24.20
i    >  24.14
z   >  19.92

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.