GRB 200227A: RATIR Optical Observations
Abstract
We observed the field of GRB 200227A (Laha et al., GCN Circ. 27234) 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 2020/02 28.17 to 2020/02 28.24 UTC (20.84 to 22.53 hours after the BAT trigger), obtaining a total of 0.69 hours exposure in the r and i bands. For a source within the Swift-XRT enhanced error circle (Beardmore et al., GCN Circ. 27243), in comparison with the SDSS DR9, we obtain the following upper limits (3-sigma): r > 19.73 i > 20.33 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.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- February 2020
- Bibcode:
- 2020GCN.27265....1W