[vsnet-grb-info 17794] GRB 160327A: RATIR Optical and NIR Afterglow Detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19236
SUBJECT: GRB 160327A: RATIR Optical and NIR Afterglow Detection
DATE:    16/03/27 11:52:25 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 160327A (Racusin, et al., GCN 19235) 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 2016/03 27.39 to 2016/03 27.41 UTC (3.6
minutes to 0.58 hours after the BAT trigger), obtaining a total of 0.36
hours exposure in the r and i bands and 0.15 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 catalogs, we obtain the following detections:

r    21.78 +/- 0.13
i    19.68 +/- 0.02
Z   18.55 +/- 0.02
Y   17.75 +/- 0.01
J    17.56 +/- 0.01
H   16.74 +/- 0.01

These magnitudes are in the AB system and are not corrected for Galactic
extinction in the direction of the GRB. The source is located at RA, Dec =
9:46:48.54, +54:0:46.4 (J2000, +/-0.5").

Further observations are planned.

We thank the staff of the Observatorio Astronómico Nacional in San Pedro
Mártir.