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GCN Circular 30190

Subject

GRB 210610B: RATIR Optical and NIR Observations

Date

2021-06-11T05:42:17Z (3 years ago)

From

Rosa Leticia Becerra Godinez at Inst. de Astronoma,UNAM <rbecerra@astro.unam.mx>

Rosa L. Becerra (UNAM), Alan M. Watson (UNAM), Nat Butler (ASU), Alexander
Kutyrev (GSFC),
William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI),
J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara
(UVI), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico
Ramirez-Ruiz (UCSC), Jes��s Gonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM),
Harvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (U. Wash.), and
Vicki Toy (UMD) report:

We observed the field of GRB 210610B (K.L. Page, et al., GCN 30170Not found
 
 
 and J.P.
Osborne, et al., GCN 30189Not found
 
 
)
with the
Reionization and Transients Infrared Camera (RATIR) on the 1.5m Harold
Johnson Telescope at the Observatorio Astron��mico Nacional on Sierra San
Pedro M��rtir from 2021/06 11.16 to 2021/06 11.18 UTC (7.91 to 8.38
hours after the BAT trigger), obtaining a total of 0.33 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 and upper
limits (3-sigma):

  r = 18.03 +/- 0.01
  i = 17.86 +/- 0.01
  Z = 17.65 +/- 0.01
  Y = 17.47 +/- 0.02
  J = 17.55 +/- 0.03
  H = 17.43 +/- 0.03

These magnitudes are in the AB system and are not corrected for Galactic
extinction in the direction of the GRB.
Further observations are planned.

We thank the staff of the Observatorio Astron��mico Nacional in San Pedro
M��rtir.