[vsnet-grb-info 15692] GRB 141029A: RATIR Optical and NIR Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16980
SUBJECT: GRB 141029A: RATIR Optical and NIR Observations
DATE:    14/10/29 04:12:02 GMT
FROM:    Eleonora Troja at GSFC  <eleonora.troja at nasa.gov>

Eleonora Troja (GSFC), 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), 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),
and Harvey Moseley (GSFC) report:

We observed the field of the Fermi/LAT GRB 141028A (Bissaldi et al., GCN 
16969, Roberts et al.
GCN 16971) 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 Astronómico Nacional 
on Sierra San Pedro
Mártir from 2014/10 29.08 to 2014/10 29.13 UTC  (from 13.62 to 14.82 
hours after the
Fermi-GBM trigger),  obtaining a total of 1.07 hours exposure in the r, 
i and z bands.

At the position of the XRT and optical counterparts (Kennea et al., GCN 
16978, Gorbovskoy
et al. GCN 16972,  Graham et al. GCN 16977), in comparison with the SDSS 
DR9, we
obtain the following detections:

   r20.09 +/- 0.02
   i19.85 +/- 0.02
   z 19.50 +/- 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 Astronómico Nacional in San Pedro
Mártir.