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[vsnet-alert 3094] Sudden fading of FN Sgr

Sudden fading of FN Sgr

  L. E. Shaw reports the sudden fading of FN Sgr, symbiotic variable currently
undergoing an outburst.  A similar sharp drop was observed in 1996, centering
1996 June.  There was also an indication of fading in 1997 Dec. - 1998 Jan.
(coverage incomplete due to the seasonal gap).  cf. vsnet-alert 433, 528

  The present observation likely indicate the existence of deep eclipses,
with a period of ~540 d.  Observations are strongly encouraged.

  YYMMDD(UT)   mag  observer
  990225.100   116  (B. Monard)
  990308.099   116  (D. Overbeek)
  990309.058   116  (D. Overbeek)
  990316.103   122  (D. Overbeek)
  990317.100   118  (D. Overbeek)
  990326.100   117  (B. Monard)
  990413.000   117  (B. Monard)
  990424.000   118  (B. Monard)
  990424.369   121  (R. J. Modic)
  990429.760  12.41B  (S. Kiyota)
  990429.764  12.07V  (S. Kiyota)
  990429.767  11.38Rc  (S. Kiyota)
  990510.000   118  (B. Monard)
  990514.699   118  (T. Watanabe)
  990606.378   146: (L. E. Shaw)

Regards,
Taichi Kato

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