TITLE: GCN CIRCULAR NUMBER: 42305 SUBJECT: GRB 251014B: PRIME J-band upper limit DATE: 25/10/16 00:42:42 GMT FROM: N. Passaleva at Sapienza University of Rome <niccolo.passaleva@uniroma1.it> J. Durbak (UMD), N. Passaleva (U Rome), O. Guiffreda (UMD), M. El Kabir (U Rome), E. Troja (U Rome), A. S. Kutyrev (NASA/GSFC), S. B. Cenko (NASA/GSFC) Following the Swift/BAT-GUANO (Ronchini et al., GCN 42263) detection of Fermi/GBM-detected event, we observed the transient field in J filter with PRIME. Observations started ~16 hours after the initial Fermi trigger. Using VISTA Kilo-degree Infrared Galaxy (VIKING) Survey nearby stars for preliminary calibration we do not detect any uncatalogued source down to J>21 AB (3-sigma) not corrected for galactic extinction at the position of the candidates reported by Swift/XRT (Lanava et al. GCN 42289), confirming the optical non-detection reported by Yadav et al. (GCN 42287) 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. View this GCN Circular online at https://gcn.nasa.gov/circulars/42305. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...