[vsnet-obs 18309] New Takamizawa variable (TmzV109)

[Taichi Kato <tkato>]

New Takamizawa variable (TmzV109)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV109).

TmzV109
= GSC5406.1896 070954.12 -143144.2 (2000.0) 14.07 0 N
= GSC5406.1896 070954.12 -143144.4 (2000.0) 13.71 0 N
= GSC5406.1823 070954.57 -143142.4 (2000.0) 13.66 0 N
= IRAS07076-1426 070737.6 -142647 (1950.0)
    F12=0.48  F25=0.21  F60=0.40L F100=1.90L
    VAR=13 LRS=-1
 possibly II: variable star with 'young' O-rich circumstellar shell
 or VII: variable star with more evolved C-rich circumstellar shell
 or VIa: non-variable star with relatively cold dust at large
      distance, may be carbon-rich
= 070954.7 -143143 (2000.0) IRAS07076-1426 0.471 0.208 0.400L 1.862L 13%
= 070954.7 -143143 (2000.0) SSC07076-1426 0.471 0.208 0.400L 1.862L

  Takamizawa's comment:

  The star may be a semiregular variable (SR) with a range of 12.5-14.2p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV109        940314.488  141p  Tmz.VSOLJ
TmzV109        940402.451  139p  Tmz.VSOLJ
TmzV109        941203.720  136p  Tmz.VSOLJ
TmzV109        950210.798  130p  Tmz.VSOLJ
TmzV109        951118.753  136p  Tmz.VSOLJ
TmzV109        951219.615  134p  Tmz.VSOLJ
TmzV109        960211.504  138p  Tmz.VSOLJ
TmzV109        961021.752  142p  Tmz.VSOLJ
TmzV109        961206.651  141p  Tmz.VSOLJ
TmzV109        970127.474  136p  Tmz.VSOLJ
TmzV109        971203.670  135p  Tmz.VSOLJ
TmzV109        971224.623  134p  Tmz.VSOLJ
TmzV109        980119.507  138p  Tmz.VSOLJ
TmzV109        980217.485  136p  Tmz.VSOLJ
TmzV109        980318.512  137p  Tmz.VSOLJ
TmzV109        981115.721  125p  Tmz.VSOLJ

Observer's code:
  Tmz: K.Takamizawa (Saku-machi,Nagano,Japan)
       Inst.: 10cmR F4 twin patrol cameras  T-Max400 120
       Comparison stars mag.:GSC

Relayed from Kesao Takamizawa <GHA07243@nifty.ne.jp>

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