{
  "circularId": 40690,
  "eventId": "EP250610a",
  "format": "text/plain",
  "submittedHow": "web",
  "body": "M. H. Siegel (PSU) reports on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of EP250610A 3 ks after the EP trigger (Zhang et al., GCN Circ. 40660). No optical afterglow consistent with the XRT position (Evans et al., GCN Circ. 40662) is seen in the initial UVOT exposures.\n\nPreliminary detections using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the exposures are: \n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\nu                 3087         9399         2103            >21.44\nu                35617        41300         1846            >21.33\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.01 in the direction of the burst\n(Schlegel et al. 1998).\n",
  "submitter": "Mike Siegel at PSU/Swift MOC <mhs18@psu.edu>",
  "bibcode": "2025GCN.40690....1S",
  "subject": "EP250610A: Swift/UVOT Upper limits",
  "createdOn": 1749652787611
}