GRB 200522A: LCO Optical Afterglow Detection
Abstract
We observed Swift GRB 200522A (Evans et al., GCN 27778) with the LCO 1-m Sinistro instrument at the South African Astronomical Observatory site, on May 23, from 03:20 to 04:20 UT (corresponding to 15.65 to 16.65 hours from the GRB trigger time) with the Bessel R and I filters. We performed a series of 5x180s exposures in R and I. We detect an optical source in R band, but not I band, in stacked images at the Swift XRT enhanced position (Beardmore et al., GCN 27780). Using the USNO-B.1 catalog as reference, we calculate the following magnitude and upper limit: R = 21.49 +/- 0.16 I > 20.39 These magnitudes are not corrected for galactic extinction. R.S. is funded by NSF AST grant #1831682 [GCN OPS NOTE(23may20): See Circular 27794 for a correction.]
- Publication:
-
GRB Coordinates Network
- Pub Date:
- May 2020
- Bibcode:
- 2020GCN.27792....1S