GCN Circular 42153
Subject
GRB 251005C: PRIME J-band upper limit
Event
Date
2025-10-07T23:04:57Z (a day ago)
From
N. Passaleva at Sapienza University of Rome <niccolo.passaleva@uniroma1.it>
Via
Web form
M. El Kabir (U Rome), O. Guiffreda (UMD), N. Passaleva (U Rome), J. Durbak (UMD), E. Troja (U Rome), A. S. Kutyrev (NASA/GSFC), S. B. Cenko (NASA/GSFC)
Following the Swift/BAT detection and Swift/XRT localization of an uncatalogued source (Page et al, GCN 42113), we observed the transient field in J filter with PRIME ~32.9 hours after the initial BAT trigger.
Using Two Micron All Sky Survey (2MASS) for preliminary calibration we do not detect any uncatalogued source down to J>20.2 AB (3-sigma) not corrected for galactic extinction at the position of the candidates reported by Swift/XRT (Goad et al. GCN 42116), and SVOM/VT (Palmerio et al., GCN 42123).
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.