TITLE: GCN CIRCULAR NUMBER: 38384 SUBJECT: GRB 241127A: PRIME near-infrared detection DATE: 24/11/29 19:31:33 GMT FROM: Joe Durbak at UMD gcn.joedurbak@gmail.com
J. Durbak (UMD), E. Troja (U Rome), O. Guiffreda (UMD), A. S. Kutyrev (NASA/GSFC), S. B. Cenko (NASA/GSFC)
Following the Swift BAT detection (GCN 38354), we observed the transient field in J and H filters with PRIME ~23 hours after Swift detection.
At the position of the optical counterpart reported by Swift UVOT (GCN 38354), we detect an uncatalogued source in J-band. Using nearby VISTA Hemispherical Survey (VHS) for preliminary calibration we derive the following magnitude and limit, not corrected for Galactic extinction:
| Filter | Mag(AB) | |--------|--------------| | J | 20.5 +/- 0.1 | | H | > 20.1 |
PRIME is a 1.8m telescope with 1.56 square degree FOV (0.5 arcsec/pixel) located in Sutherland, South Africa at the South African Astronomical Observatory (SAAO) (Kutyrev et al. 2023, Yama et al. 2023, Durbak et al. 2024).
We thank the Osaka University observers at PRIME and the staff at SAAO for their support with these observations.
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