GRB 170519A: RATIR Optical and NIR Observations
Abstract
We observed the field of GRB 170519A (Ukwatta, et al., GCN 21106) 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 2017/05 19.22 to 2017/05 19.32 UTC (1.8 minutes to 2.44 hours after the BAT trigger), obtaining a total of 1.41 hours exposure in the r and i bands and 0.60 hours exposure in the Z, Y, J, and H bands. The optical transient (GCN 21106; Izzo, et al., GCN 21108) is clearly detected. In comparison with the SDSS DR9 and 2MASS catalogs, we obtain: r 16.72 +/- 0.01 i 16.50 +/- 0.01 Z 16.34 +/- 0.01 Y 16.25 +/- 0.01 J 16.15 +/- 0.01 H 15.87 +/- 0.01 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. The lightcurve rises in all bands initially, peaking at i~16 at about 15 minutes after the GRB trigger, then fading as t^(-0.8). We thank the staff of the Observatorio Astronómico Nacional in San Pedro Mártir.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- May 2017
- Bibcode:
- 2017GCN.21109....1B