GRB240122A: PRIME near infrared detection
Abstract
Following the MAXI/GSC detection (Negoro et al. GCN 35593), GOTO optical candidate GOTO24eu/AT2024apy (Kumar et al. GCN 35596), and the Swift afterglow detection (Ambrosi et al. GCN 35600), we observed the transient field using J and H filters with PRIME ~1.5 days after MAXI/GSC detection. At the position of the optical counterpart detected by GOTO, we detect an uncatalogued source in both J and H bands. Using nearby 2MASS stars for preliminary calibration we derive the following magnitudes, not corrected for Galactic extinction: Filter | Mag(AB) | SNR | Seeing | Total exposure time (s) -------|----------------|-----|--------|------------------------- J | 21.02 +/- 0.20 | 6.3 | 1.373" | 1802 H | 20.90 +/- 0.21 | 6.1 | 1.480" | 1544 PRIME is a 1.8m telescope with 1.56 square degree FOV (0.5 arcsec/pixel) located in Sutherland, South Africa. Further observations are planned. We thank the Osaka University observers at PRIME and the staff at SAAO for their support with these observations.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- January 2024
- Bibcode:
- 2024GCN.35633....1G