{
  "createdOn": 1734130459030,
  "eventId": "GRB 241213A",
  "body": "S.P.R. Shilling (Lancaster) and R. Gupta (NASA GSFC)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 241213A\n106 s after the BAT trigger (Gupta et al., GCN Circ. 38547).\nNo optical afterglow consistent with the enhanced XRT position\n(Osborne et al., GCN Circ. 38552) is detected in the initial UVOT exposures.\nPreliminary 3-sigma upper limits using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first\nfinding chart (FC) exposure and subsequent exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\n\nwhite_FC           106          256          147         >20.6\nu_FC               318          568          246         >19.8\nwhite              106          945          259         >20.7\nv                  648         4786          236         >19.2\nb                  573          766           39         >19.0\nu                  318          742          265         >19.9\nw1                 698         5045           67         >18.7\nm2                 673         4991          216         >19.5\nw2                 624         4581          236         >19.5\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.060 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 38564,
  "submitter": "Sam Shilling at Lancaster University <shilling.sam@gmail.com>",
  "submittedHow": "web",
  "subject": "GRB 241213A: Swift/UVOT Upper Limits",
  "format": "text/plain",
  "bibcode": "2024GCN.38564....1S"
}