[vsolj-alert 77] Fading of FG Sge?

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

Fading of FG Sge?

　桜井天体同様のヘリウムフラッシュ天体と考えられているFG Sgeがまた減光しつつ
　ある可能性が複数の観測者から指摘されています。今後急激に減光してゆくのか、
　監視が望まれます。渡辺努さんがいちはやくこの減光を報告されました。

　以下vsnet-alertへの投稿です。

   FG Sge, peculiar variable star, a candidate post final helium flash
object, may be fading as indicated by the following observations.
The latest deep fading was observed in early-mid 1996.  Since that time
the system gradually recovered to the "usual" maximum level.  Possibility
still exists that the present birhgteness may be within the range of the
star's usual variation at maximum.  Please keep a close eye on FG Sge.

  YYMMDD(UT)   mag  observer
  980219.230    98  (B. H. Granslo)
  980222.219    98  (B. H. Granslo)
  980227.190    97  (B. H. Granslo)
  980227.199    97  (O. Midtskogen)
  980302.841    99  (T. Kato)
  980306.828    97  (T. Watanabe)
  980307.160    97  (B. H. Granslo)
  980313.814    99  (T. Watanabe)
  980314.090    99  (B. H. Granslo)
  980316.776   103  (T. Watanabe)
  980317.180    97  (B. H. Granslo)
  980319.100    98  (B. H. Granslo)
  980323.100    98  (B. H. Granslo)
  980328.069    99  (B. H. Granslo)
  980402.090   102  (B. H. Granslo)
  980403.030   101  (B. H. Granslo)
  980411.740   107  (T. Watanabe)
  980412.133   106  (G. Poyner)

Regards,
Taichi Kato

（転載歓迎）

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