{
  "bibcode": "1999GCN...303....1U",
  "body": "R. Uglesich and B. Sugerman (Columbia U.) report:\n\nWe obtained R-band images of the refined RXTE/IPN error region of GRB 990506 \n(Hurley et al. GCN #298) using the MDM Observatory 1.3m and a CCD covering a \n10.7 x 10.7 arcmin field.  On the nights of May 7 UT and May 8 UT, seeing was \napproximately 1.3 and 1.5 arcseconds, respectively.  Exposure times were\n75 minutes on the first night and 100 minutes on the second.  The Landolt \nstandard star field of PG 1047+003 was used for calibration.  The object at \n(J2000) 11:54:57.8, -26:43:03.8, which was reported as possibly variable by\nVrba et al. (GCN #300), is measured at R = 22.43 +/- 0.15 on May 7.2, and\nR = 22.38 +/- 0.18 on May 8.2, thus confirming the conclusions of Vreeswijk\n& Rol (GCN 301) and Garnavich et al. (GCN #302) that it is not variable. \n\n[GCN OP NOTE (10May99):  At the author's request (JH), the last sentence\n(of a humorous perspective) of the originally submitted circular was removed \nfrom this archived copy, as it does not follow the content guidelines\nof the Circulars.]",
  "circularId": 303,
  "createdOn": 926219415000,
  "email": "jules@astro.columbia.edu",
  "subject": "GRB 990506, Optical Observations",
  "submitter": "Jules Halpern at Columbia U.  <jules@astro.columbia.edu>",
  "eventId": "GRB 990506"
}