{
  "eventId": "GRB 240825A",
  "body": "O. Guiffreda (UMD), J. Durbak (UMD), S. Atri (U Rome), A. S. Kutyrev (NASA/GSFC), E. Troja (U Rome), K. De (MIT), S. B. Cenko (NASA/GSFC)\n\nFollowing the Swift BAT detection (GCN 37274), and Fermi GBM detection (GCN 37273), we observed the transient field in J and H filters with PRIME ~8 hours after FERMI & Swift detection.\n\nAt the position of the optical counterpart reported by Swift UVOT (GCN 37274), we detect an uncatalogued source in J and H bands. Using nearby VISTA Hemispherical Survey (VHS) stars for preliminary calibration we derive the following magnitudes, not corrected for Galactic extinction:  \n\nFilter | Mag(AB)      | SNR  | Seeing | Exp. time (s) \n-------|--------------|------|--------|---------------\nJ      | 18.9 +/- 0.2 | 17.5 | 2.1”   | 600           \nH      | 18.5 +/- 0.2 | 34.0 | 2.3”   | 600           \n\nThe J-band results are consistent with the REM detection of 17.7 +/- 0.3 Mag(Vega) (GCN 32795) taken an hour later.\n\nFurther observations are planned.\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).\n\nWe thank the Osaka University observers at PRIME and the staff at SAAO for their support with these observations.\n",
  "createdOn": 1724692361763,
  "version": 2,
  "bibcode": "2024GCN.37303....1G",
  "format": "text/plain",
  "subject": "GRB 240825A: PRIME near-infrared detection",
  "editedOn": 1724706909304,
  "editedBy": "Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Joe Durbak at UMD <gcn.joedurbak@gmail.com>",
  "submitter": "Joe Durbak at UMD <gcn.joedurbak@gmail.com>",
  "circularId": 37303,
  "submittedHow": "web"
}