{
  "bibcode": "2005GCN..3067....1N",
  "body": "M. Nysewander, M. Bayliss, J. Haislip, P. Price (Hawaii), C. MacLeod, J.\nKirchbrown, D. Moschler, A. Foster, D. Reichart, O. Awam, A. Davis, M.\nGreco, D. Kumar, T. Mack, A. Mann, B. Russ, C. Owen, and J. Phelps report\non behalf of the UNC team of the FUN GRB Collaboration:\n\nWe observed the 8 arcsecond position of the uncataloged x-ray source found\nby the Swift XRT instrument (Giommi et al., GCN 3054) in the field of GRB\n050223 with three telescopes of the PROMPT robotic telescope array located\nat CTIO.  Manual observations first began in V 2.5 hours after the burst at\nhigh airmass and no new sources were observed to the limiting magnitude of\na single exposure.  Observations continued in Rc and Ic and details are\ngiven below.\n\nPROMPT  filter   exposures        start       mean      2s limiting\n  #                             time (hr)   time (hr)    magnitude\n  1       Rc    20x90s, 120x60s   2.8         4.1          21.2\n  3       V     130x90s           2.5         4.2          21.3\n  5       Ic    60x90s            4.3         5.1          21.1\ntimes are given in hours after the burst (03:09:06 UT).\n\nLimiting magnitudes were calculated using 2 NOMAD stars for V, and 5\nUSNO-B1.0 stars for Ic and Rc.\n\nAn overview of PROMPT can be found at astro-ph/0502429.  The project is\nstill in the building/commissioning phase with only three telescopes\ncurrently online.",
  "circularId": 3067,
  "createdOn": 1109655521000,
  "email": "mnysewan@physics.unc.edu",
  "subject": "PROMPT VRcIc Observations of GRB 050223",
  "submitter": "Melissa Nysewander at UNC,Chapel Hill  <mnysewan@physics.unc.edu>",
  "eventId": "GRB 050223"
}