{
  "bibcode": "1999GCN...261....1O",
  "body": "S. C. Odewahn, J. S. Bloom, S. Djorgovski, S. R. Kulkarni,\nand F. Harrison (CIT) report on behalf of the Caltech-NRAO-CARA \nGRB Collaboration:\n\nWe have processed the HST STIS images of GRB 990123 using a variety\nof techniques and have deduced the following magnitudes: \n\nEstimates of Gunn r magnitudes from the Median stack STIS image:\n  r(OT)          = 25.25 -+0.2      systematic+accidental error\n  r(OT+GAL)      = 24.16 -+0.1      accidental error only\n  r(A2)          = 27.18 -+0.02     accidental error only\n  r(OT+GAL+A2)   = 24.09          \n\nEstimates of Gunn r magnitudes from the drizzled STIS image: \n  r(OT)          = 25.28 -+0.2    systematic+accidental error \n  r(OT+GAL)      = 24.12 -+0.1    systematic+accidental error \n  r(A2)          = 27.23 -+0.02   systematic+accidental error         \n  r(OT+GAL+A2)   = 24.06         \n\nDetails of the reduction, the image properties and a map defining \nthe apertures for OT, GAL, and A2 (a discrete source 0.9\" from\nthe OT) may be found at:\nhttp://astro.caltech.edu/~sco/sco1/research/grb/grb990123/stis.html\n\nIn this website we detail the procedure for obtaining by anonymous \nftp our final STIS images, a deep Keck R-band image, and the Palomar \n60-inch OT discovery image discussed in GCN 201.  These data may be \nused without any need to cite the source.\n\nThis message may be cited.",
  "circularId": 261,
  "createdOn": 919432350000,
  "email": "sco@astro.caltech.edu",
  "subject": "GRB990123: Caltech STIS Photometry and Images",
  "submitter": "Steve Odewahn at Caltech  <sco@astro.caltech.edu>",
  "eventId": "GRB 990123"
}