[vsnet-grb-info 17124] GRB 151022A: RATIR Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  18449
SUBJECT: GRB 151022A: RATIR Upper Limits
DATE:    15/10/23 05:37:43 GMT
FROM:    Nat Butler at UC berkeley  <natxbutler at gmail.com>

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), Antonino Cucchiara (GSFC/STScI), 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 151022A (D'Avanzo, et al., GCN 18436) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron�mico Nacional on Sierra San Pedro M�rtir from 2015/10 23.16 to 2015/10 23.18 UTC (13.77 to 14.17 hours after the BAT trigger), obtaining a total of 0.36 hours exposure in the r, i, and z bands.  For a source within the Swift-XRT error circle (Beardmore, et al., GCN 18444), in comparison with the SDSS DR9, we obtain the following upper limits (3-sigma):

   r > 23.11
   i > 23.04
   z > 19.84

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.