{
  "bibcode": "2001GCN...915....1B",
  "body": "Optical observations of GRB 001018 with JCAM\n\nJ. S. Bloom, A. Diercks, S. R. Kulkarni, F. A. Harrison, (Caltech), B. B.\nBehr (U. Texas), J. C. Clemens (UNC) report on behalf of the larger\nGRB-NRAO-CARA GRB collaboration:\n\n\"On 18 December 2000 UT, J. Bloom and D. Reichart observed the field of\nGRB 001018 (Hurley et al., GCN #853) near the transient radio position\nreported by Taylor et al. (GCN #857) on the Palomar 200-inch telescope\nduring a commissioning run of the Jacobs Camera (JCAM), a dual-CCD imager\ndesigned primarily for rapid follow-up of GRB afterglow.  The plate scale\nof JCAM is 0.38 arcsec/pixel and the field-of-view is 3.2 x 3.2 arcmin^2.\n\nWe observed the GRB field simultaneously in R- and B-band for a total of\n2700s. An astrometric plate solution was obtained using 10 (11) ties stars\ncommon to both the USNO-A2.0 catalogue and the R- (B-) band summed image.  \nThe total absolute astrometric uncertainty in the R-band plate solution\nwas 0.32\", 0.27\" in RA and Dec.  Unfortunately, the seeing (2.8 arcsec\nFWHM in R-band) was very poor at Palomar on 18 December and there was\nsignificant extinction due to cirrus. At the position of Taylor's radio\ntransient there were no detected objects to R~22.7 mag (5-sigma); the\nphotometric zeropoint was estimated using the USNO stars in the field.\"\n\nThe R and B finding chart images of the may be obtained at:\n   http://www.astro.caltech.edu/~jsb/GRB/grb001018/\n\nFor further information on JCAM, please see:\n   http://www.astro.caltech.edu/~jsb/Jcam\n\nThis message may be cited.",
  "circularId": 915,
  "createdOn": 979848039000,
  "email": "jsb@astro.caltech.edu",
  "subject": "Optical observations of GRB 001018 with JCAM",
  "submitter": "Josh Bloom at CIT  <jsb@astro.caltech.edu>",
  "eventId": "GRB 001018"
}