{
  "bibcode": "2010GCN.11286....1S",
  "body": "T. Sakamoto (UMBC/GSFC), D. Donato (UMCP/GSFC), N. Gehrels (GSFC),\nT. Okajima (JHU/GSFC), Y. Urata (NCU), C.A. Wallace (FGCU)\n\nWe observed the field of GRB 100915B detected by INTEGRAL \n(trigger #6061; Mereghetti et al., GCN Circ. 11278) with the 14-inch\nGoddard Robotic Telescope (GRT) located at the Goddard Geophysical\nand Astronomical Observatory (http://cddisa.gsfc.nasa.gov/ggao/).\n\nA total 226 images (excluding the bad quality images) of 5 sec (200 images) \nand 30 sec (26 images) exposures were taken in the R filter starting from \nSeptember 15 05:50:55 (UT) about 76 seconds after the trigger (62 seconds \nafter the initial INTEGRAL position notice) and stopped on \nSeptember 15 06:37:44 (UT).  The weather condition was relatively poor \nduring the observation.  We do not detect the optical afterglow both in \nthe individual images and the stacked image inside the INTEGRAL position \n(Mereghetti et al., GCN #11278).  The estimated five sigma upper limit \nof the combined image (total exposure of 1740 sec) is ~17.7 mag using \nthe USNO-B1 catalog.",
  "circularId": 11286,
  "createdOn": 1284596123000,
  "email": "takanori.sakamoto-1@nasa.gov",
  "subject": "GRB 100915B: GRT Optical Observation",
  "submitter": "Takanori Sakamoto at NASA/GSFC  <takanori.sakamoto-1@nasa.gov>",
  "eventId": "GRB 100915B"
}