{
  "bibcode": "1998GCN...120....1H",
  "body": "A. Henden, C. Luginbuhl and F. Vrba (U.S. Naval Observatory Flagstaff\nStation) report that they have obtained extensive I-band and J-band\nobservations of the near-IR sources and surrounding field associated\nwith SGR1900+14 both before and after the recent onset of activity.\nNone of the observations coincide with bursts detected by BATSE, and no\nunusual photometric behavior has been detected though reductions are\nongoing.  A new eclipsing binary has been detected nearby, however, at\nRA 19:07:16.85 DEC +09:18:50.4 (J2000), about 39.0 arcseconds SE of\nthe M supergiant pair.  The binary is about I=19.1 out of eclipse,\nand has been observed through several eclipses of about 0.4mag depth.\nThe period is either about 1.07day or some integer fraction.\nThis binary appears as the star labelled 'J' in Figure 1 of\nVrba et. al. ApJ 468:225 (1996).  We bring this star to the attention of\nother observers in the hope that it not send anyone on a wild goose\nchase if it is detected as a variable in observations of this\ngamma-ray burst location.\n\nThis message is quotable in publications.",
  "circularId": 120,
  "createdOn": 899226316000,
  "email": "aah@nofs.navy.mil",
  "subject": "SGR1900+14 field optical observations",
  "submitter": "Arne A Henden at USNO/USRA  <aah@nofs.navy.mil>"
}