{
  "bibcode": "2010GCN.10736....1L",
  "body": "W.B. Landsman (GSFC) and R. Margutti (INAF-OAB)  report on behalf of \nthe  Swift/UVOT team.\n\nSwift/UVOT has continued observations of GRB100508A through 93,000s \nafter the initial trigger (Margutti et al. GCN 10728).    The afterglow \nreported by Landsman and Margutti (GCN 10730)  was not detected in any \nfilter past 12,000s after the initial trigger.     Magnitudes and 3 \nsigma upper limits for selected exposures are reported below:\n\nFILTER     T_start(s)     Exposure     Mag/3UL\n=================================================\nwhite fc     152            147        18.91 � 0.07\nwhite        864            147        20.70 � 0.31\nwhite      11708            295        21.22 � 0.30\nu            310            246        19.16 � 0.15\nu           6860            197        20.12 � 0.36\nb           5634            197 > 20.7\nv           6250            197 > 19.7\n================================================\n\n\nAt late times our 3\" photometry aperture includes the galaxy reported \nby  Schady et al. (GCN 10734), which may be the GRB host.   This galaxy \nis also listed in the SuperCosmos Sky Survey ( \nhttp://www-wfau.roe.ac.uk/sss/docs.html ) with coordinates 2.1\" distant \nfrom the UVOT position.   The late-time white magnitude in a 6491s \nsummed exposure taken between 57097s and 93249s after the trigger within \nthe 3\" aperture used to measure the afterglow is 21.86 � 0.12.\n\nThere are no detections or interesting magnitude limits in the UV filters.\n\nThe above magnitudes are not corrected for the Galactic extinction \ncorresponding to a reddening of E(B-V) = 0.029 (Schlegel et al., 1998, \nApJS, 500, 525). There was a typo in the value of E(B-V) reported for \nthis burst by Landsman & Margutti (GCN 10730).   The photometry is on \nthe UVOT photometric system described in Poole et al. (2008, MNRAS, \n383, 627).",
  "circularId": 10736,
  "createdOn": 1273498698000,
  "email": "wayne.b.landsman@nasa.gov",
  "subject": "GRB100508A: Further Swift/UVOT Observations",
  "submitter": "Wayne Landsman at GSFC/SSAI  <wayne.b.landsman@nasa.gov>",
  "eventId": "GRB 100508A"
}