{
  "bibcode": "2024GCN.37729....1K",
  "subject": "GRB 241006A: Swift/UVOT Upper Limits",
  "submitter": "Paul Kuin at MSSL <npkuin@gmail.com>",
  "body": "N.P.M. Kuin and R. Gupta (NASA GSFC) report on behalf of\nthe Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of\nGRB 241006A   350 s after the BAT trigger (Gupta et al.,\nGCN Circ. 37722). No optical afterglow consistent with the XRT\nposition has been detected in the initial UVOT exposures.\n\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           350          499          147         >21.0\nwhite              350          625          167         >21.0\nv                  656          676           19         >17.4\nb                  580          600           19         >19.0\nu                  556          575           19         >17.9\nw1                 531          715           28         >18.8\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.065 in the direction of the burst\n(Schlegel et al. 1998).\n",
  "circularId": 37729,
  "createdOn": 1728305312094,
  "eventId": "GRB 241006A",
  "submittedHow": "email"
}