{
  "bibcode": "2025GCN.42273....1D",
  "createdOn": 1760482020898,
  "format": "text/plain",
  "submittedHow": "web",
  "submitter": "Joe Durbak at UMD <gcn.joedurbak@gmail.com>",
  "circularId": 42273,
  "eventId": "GRB 251014A",
  "subject": "GRB 251014A: PRIME near-infrared upper limits",
  "body": "J. Durbak (UMD), O. Guiffreda (UMD), N. Passaleva (U Rome), M. Elkabir (U Rome), A. S. Kutyrev (NASA/GSFC), E. Troja (U Rome), S. B. Cenko (NASA/GSFC)\n\nFollowing the Swift BAT (Ambrosi et al, GCN 42238) and Fermi GBM (Fermi GBM Team, GCN 42237) detection, we observed the transient field in J-filter with PRIME ~1 hour after Swift and Fermi detection.\n\nAfter comparing a previous J-band epoch observed in this location on 2024-11-17, we detect no new sources in J-band within the Swift BAT localization region. Using nearby 2MASS stars for preliminary calibration we derive a limiting magnitude >19.7 AB for the previous epoch, not corrected for Galactic extinction.\n\nFurther observations are planned to obtain deeper imaging.\n\nPRIME 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).\n\nWe thank the Osaka University observers at PRIME and the staff at SAAO for their support with these observations."
}