GRB 200131A: RATIR Optical Observations
Abstract
We observed the field of GRB 200131A (Sbarufatti et al., GCN 26953) 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 1.10 to 2020/02 1.14 UTC (3.79 to 4.61 hours after the BAT trigger), obtaining a total of 0.64 hours exposure in the r and i bands. The optical transient (see, also, Lipunov et al., GCN 26954) is well-detected. We find: r = 19.97 +/- 0.04 i = 19.75 +/- 0.02 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.26957....1B