{
  "bibcode": "1999GCN...408....1A",
  "body": "Tim Axelrod, Jeremy Mould and Brian Schmidt (The Research School of\nAstronomy and Astrophysics, The Australian National University) report\nthe following observations of GRB990907 and GRB990908.\nWe have imaged the position of both GRB990907 and GRB990908 with the\nMount Stromlo 50inch telescope + macho camera at multiple epochs in  \napproximately 2.4\" seeing.  A differential image analysis of an area\n21'x21' around the BeppoSAX position of GRB990907 (GCN 405) from two\nimages taken 1999 Sep 8.56 and 1999 Sep 9.60 shows no variable sources\nwith residuals brighter than a magnitude of m_v=20.3.  A similar analysis\nof a 21'x21' field centered on the BeppoSAX position of GRB990908\n(GCN 406) from images taken 1999 Sep 8.48 and 1999 Sep 9.59 shows a single\nvariable stellar object (mag approx 18), fading by 0.3 magnitudes,\npresent at both epochs, and present on the Digital Sky Survey (RA:\n06:51:10.52 DEC: -75:02:17.3 J2000).  This object is most likely a short\nperiod variable star within our own galaxy, but due to our\npoor seeing conditions, it is possible the host could be a compact\ngalaxy, and is therefore worthy of further investigation.  No other sources\nwere seen with residuals brighter than m_v=20.3.",
  "circularId": 408,
  "createdOn": 936996950000,
  "email": "brian@mso.anu.edu.au",
  "subject": "GRB990907 and 990908",
  "submitter": "Brian Schmidt at Res. School of Astro.and Astrophbrian@mso.anu.edu.au  <brian@mso.anu.edu.au>",
  "eventId": "GRB 990907"
}