{
  "body": "A. Martin-Carrillo (UCD), B. Schneider (LAM), D. B. Malesani (DAWN/NBI and Radboud Univ.), L. Izzo (INAF/OACn and DARK/NBI), D. Xu (NAOC), A. A. Djupvik (NOT), and A. Kadela (NOT and NBI), report on behalf of a larger collaboration:\n\nWe observed the field of the GRB 250322A (Gupta et al., GCN 39835) using the ALFOSC camera mounted on the Nordic Optical Telescope (NOT). We obtained 5 exposures of 300 s each in the SDSS-r and SDSS-z band, starting at 20:45:22 UT on 2025-03-22 (4.65 hr after the trigger).\n\nPreliminary analysis shows that no new source is detected within the Swift/XRT enhanced error box (Goad et al., GCN 39841), down to the 5-sigma AB limiting magnitudes r > 24.3 and z > 22.6, calibrated with nearby Pan-STARRS stars and without Galactic extinction correction.\n\nWe note that the XRT location includes an extended object (J2000 coordinates RA = 07:07:02.60, Dec = +07:11:33.8) also visible in the Pan-STARRS images, which is a host galaxy candidate for the GRB. Photometry of this source reveals a magnitude consistent with that reported in the Pan-STARRS catalogue, indicating no bright additional component on top of it.",
  "submittedHow": "web",
  "bibcode": "2025GCN.39842....1M",
  "format": "text/plain",
  "submitter": "Antonio Martin-Carrillo at UCD,Space Science Group <antonio.martin-carrillo@ucd.ie>",
  "createdOn": 1742685007382,
  "subject": "GRB 250322A: NOT optical upper limits",
  "circularId": 39842,
  "eventId": "GRB 250322A"
}