{
  "bibcode": "2013GCN.14323....1H",
  "body": "S. T. Holland (STScI) and P. A. Evans (U Leicester)\nreport on behalf of the Swift/UVOT team:\n\n     Swift/UVOT began settled observations of the field of GRB 130315A\nstarting 171 s after the BAT trigger (Evans et al., 2013, GCNC 14311).\nWe do not detect any new source within the XRT error circle (Page et al.,\n2013, GCNC 14317).  Preliminary UVOT 3-sigma upper limits at this\nposition are presented below.\n\n------------------------------------------------\nFilter      TSTART     TSTOP    Exposure     Mag\n------------------------------------------------\nwhite (FC)     171       321         147   >21.1 \n    u (FC)     330       580         246   >20.3 \n------------------------------------------------\n    v         4476    23,657        1136   >20.7 \n    b         3860    28,925        1685   >21.7 \n    u          330    17,889        1443   >21.4 \n uvw1         4887    17,764        1995   >21.3 \n uvm2         4681    16,857        1277   >21.0 \n uvw2         4271    22,898        1279   >21.2 \nwhite          171    29.424        1022   >22.2 \n------------------------------------------------\n\n    The quoted upper limits have not been corrected for the Galactic\nextinction along the line of sight to this burst of E_{B-V} = 0.32 mag\n(Schlafly et al. 2011, ApJS, 737, 103).  The photometry is in the UVOT\nphotometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373).\nThe photometry is affected by the presence of a J = 15.4 mag 2MASS\nsource 10301128-5147395 located 2.3 arcsec south of the XRT position.",
  "circularId": 14323,
  "createdOn": 1363465178000,
  "email": "sholland@stsci.edu",
  "subject": "GRB 130315A: Swift/UVOT Upper Limits",
  "submitter": "Stephen Holland at STScI  <sholland@stsci.edu>",
  "eventId": "GRB 130315A"
}