{
  "bibcode": "2013GCN.14573....1D",
  "body": "M. De Pasquale (MSSL/UCL) and J. K. Cannizzo (NASA/UMBC) report on behalf\nof the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 130505A\n107 s after the BAT trigger (Cannizzo et al., GCN Circ. 14563). A bright \nbut\nrapidly fading source is detected in the finding chart and initial exposures\nwithin the XRT error circle (Evans et al., GCN Circ. 14569).\n\nThe preliminary UVOT position is:\n   RA(J2000)  =    09:08:14.64 = 137.0610\n   DEC(J2000) =   +17:29:05.2  = +17.48478\nwith a 90%-confidence error radius of about 0.5 arc sec.\n\nPreliminary detections and 3-sigma upper limits using the UVOT\nphotometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for\nthe early exposures are:\n\nFilter         T_start(s)   T_stop(s)    Exp(s)           Mag\n\nwhite (FC)         107          256        147          14.14 � 0.05\nwhite             3952         4151        197          17.96 � 0.07\nv                 4362         4561        197          17.50 � 0.11\nb                 3503         3946        197          17.71 � 0.08\nu                  320          542        218          14.66 � 0.04\nuvw1              4772         4971        197          19.28 � 0.29 (~3 \nsigma)\nuvm2              4567         4766        197          >19.6\nuvw2              4158         4357        197          >19.9\n\nThe non-detection of the optical source in um2 and uw2 filters is\nconsistent with the redshift z=2.27 found by Tanvir et al (GCN Circ. 14567)\n\nThe magnitudes in the table are not corrected for the Galactic\nextinction due to the reddening of E(B-V) = 0.04 in the direction of\nthe burst (Schlegel et al. 1998).",
  "circularId": 14573,
  "createdOn": 1367771316000,
  "email": "m.depasquale@ucl.ac.uk",
  "subject": "Swift/UVOT observations of GRB130505A",
  "submitter": "Massimiliano de Pasquale at MSSL-UCL  <m.depasquale@ucl.ac.uk>",
  "eventId": "GRB 130505A"
}