{
  "bibcode": "2013GCN.14738....1D",
  "body": "M. De Pasquale (MSSL/UCL) and A. Melandri (INAF/OAB) report on behalf\nof the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 130603A\n3325 s after the BAT trigger (Melandri et al., GCN Circ. 14731). The\nuncatalogued source reported in Melandri et al., GCN Circ. 14732, is\ndetected in the summed exposures.\n\nPreliminary detections and 3-sigma upper limits using the UVOT\nphotometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for\nthe summed exposures are:\n\nFilter      T_start(s) T_stop(s)  Exp(s)           Mag\n\nwhite         3686       5322       393       19.61 � 0.15\nv             4097       5562       197      >19.02\nb             3481      16641      1278       19.71 � 0.15\nu             3275      15729      1278       19.19 � 0.13\nuvw1          4507       4707       197       19.62 � 0.39 (2.8 sigma)\nuvm2          4302       4502       197      >19.63\nuvw2          3892       5528       393       20.25 � 0.37 (2.8 sigma)\n\nThe possible detection of the optical source in uw2 filter indicates\na redshift z < ~1.5 for this event.\n\nThe magnitudes in the table are not corrected for the Galactic\nextinction due to the reddening of E(B-V) = 0.06 in the direction of\nthe burst (Schlegel et al. 1998).",
  "circularId": 14738,
  "createdOn": 1370288184000,
  "email": "m.depasquale@ucl.ac.uk",
  "subject": "Swift/UVOT observations of GRB130603A",
  "submitter": "Massimiliano de Pasquale at MSSL-UCL  <m.depasquale@ucl.ac.uk>",
  "eventId": "GRB 130603A"
}