{
  "eventType": [
    "GRB",
    "Optical Transient"
  ],
  "body": "N. Klingler (NASA-GSFC / UMBC / CRESST II) and V. D'Elia (SSDC & INAF-OAR) report on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 260924A 158 s after the BAT trigger (D'Elia et al., GCN Circ. 45713).  A source consistent with the XRT position (Evans et al., GCN Circ. 45715) is detected in the initial UVOT exposures.\n\nThe preliminary UVOT position is:\n    RA  (J2000) =  08:55:03.13 = 133.76304 (deg.)\n    Dec (J2000) = +12:02:35.4  =  12.04318 (deg.)\nwith an estimated uncertainty of 0.50 arc sec. (radius, 90% confidence).\n\nPreliminary detections and 3-sigma upper limits using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are: \n\nFilter         T_start(s)   T_stop(s)      Exp(s)           Mag\n\nwhite              158          308          147         14.68 +/- 0.02\nv                 4254         4454          197         15.11 +/- 0.03\nb                 3637         3837          197         15.71 +/- 0.03\nu                  334          372           37         17.33 +/- 0.24\nw1                4664         4864          197        >18.5\nm2                4459         4658          197        >19.2\nw2                4048         4247          197        >19.2\n\nThe magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.041 in the direction of the burst (Schlegel et al. 1998).",
  "format": "text/plain",
  "eventId": "GRB 260924A",
  "circularId": 45735,
  "subject": "GRB 260924A: Swift/UVOT Detection",
  "submitter": "noelklin@umbc.edu",
  "createdOn": 1790300277680,
  "submittedHow": "web"
}