GCN Circular 46210
Subject
GRB 261108D: PRIME near-infrared candidate
Event
Date
2026-11-09T19:42:59Z (12 hours ago)
From
N. Passaleva at Sapienza University of Rome <niccolo.passaleva@uniroma1.it>
Via
Web form
N. Passaleva (U Rome), J. Durbak (UMD), O. Guiffreda (UMD), M. El Kabir (U Rome), E. Troja (U Rome), A. S. Kutyrev (NASA/GSFC), S. B. Cenko (NASA/GSFC)
We observed the field of GRB261108D detected by the SVOM/ECLAIRs (Zhang et al., GCN 46200) in J-band with PRIME telescope. Observations started ~2h after the trigger.
Following image subtraction using reference templates from the VISTA Hemisphere Survey (VHS; McMahon et al. 2013), we detect an uncatalogued source. The coordinates of the candidate counterpart are:
RA (J2000) = 11:22:25.08 (170.60452 deg)
Dec (J2000) = -77:37:53.7 (-77.63159 deg)
with a magnitude J~18.8 AB, calibrated using nearby stars of the VHS and not corrected for galactic extinction.
We note the presence of an underlying galaxy candidate at the same position in the Legacy Survey DR11 (Dey et al. 2019), with a photometric redshift of z ~ 0.6, which may represent the putative host galaxy of the burst.
Further multi-wavelength follow-up observations are strongly encouraged to confirm the nature of this transient and its association with GRB 261108D.
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.