{
  "bibcode": "2009GCN..9735....1S",
  "body": "T. Sakamoto (UMBC/GSFC), D. Donato (ORAU/GSFC), N. Gehrels (GSFC),\nT. Okajima (JHU/GSFC), T.N. Ukwatta (GWU/GSFC), Y. Urata (NCU),\nC.A. Wallace (FGCU)\n\nWe observed the field of GRB 090727 detected by Swift\n(trigger #358520; Evans et al., GCN Circ. 9718) with the 14-inch\nGoddard Robotic Telescope (GRT) located at the Goddard Geophysical\nand Astronomical Observatory (http://cddisa.gsfc.nasa.gov/ggao/).\n\n77 set of 30 sec exposures (excluding the bad quality images) were \ntaken in the R filter starting from July 28 01:57:45 (UT) about \n3.2 hours after the trigger and stopped on July 28 02:40:50 (UT).  \nWe do not detect the optical afterglow (Smith et al., GCN Circ. \n9719; Gorosabel et al., GCN Circ. 9728; Moskvitin et al., GCN Circ. \n9733) both in the individual images and the combined image.  The \nestimated three sigma upper limit of the combined image (total \nexposure of 2310 sec) is ~16.6 mag using the USNO-B1 catalog.",
  "circularId": 9735,
  "createdOn": 1248895185000,
  "email": "takanori@milkyway.gsfc.nasa.gov",
  "subject": "GRB 090727: GRT Optical Observation",
  "submitter": "Takanori Sakamoto at NASA/GSFC  <takanori@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 090727"
}