GRB 220623A: NOT optical observations
Abstract
We observed the field of GRB 220623A (Sbarufatti et al., GCN 32243) using the Nordic Optical Telescope (NOT) equipped with the ALFOSC imager. Two sets of observations were acquired in the r and z filters, with mid times 2022 Jun 23.890 and 23.903 UT (14.3 and 14.6 hr after the trigger, respectively). The exposure times were 3x300 and 5x200 s in r and z, respectively. No source is detected in our images within or close to the GRB XRT position (Evans et al., GCN 32248), down to the following 3-sigma limits: r > 23.4 (AB); z > 22.5 (AB). Flux calibration was carried out against nearby stars from the Pan-STARRS catalog.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- June 2022
- Bibcode:
- 2022GCN.32253....1M