[vsnet-newvar 1149] New Takamizawa variable (TmzV837)

[Taichi Kato <tkato>]

New Takamizawa variable (TmzV837)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV837).

TmzV837
= GSC7458.250 205715.91 -304551.9 (2000.0) 14.39 0
= GSC7458.250 205715.93 -304551.5 (2000.0) 14.94 0
= USNO0525.35482607 205715.939 -304551.64 (2000.0) 12.1 15.6
= 2MASS 205715.950 -304551.83 (2000.0)  6.107  0.000  0.000
= IRAS20542-3057 205412.8 -305728 (1950.0)
     F12=1.74  F25=0.63  F60=0.40L F100=1.00L
     VAR= 0 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
= 205715.2 -304552 (2000.0) IRAS20542-3057 1.657 0.641 0.400L 1.000L 0%
= 205715.2 -304552 (2000.0) SSC20542-3057 1.657 0.641 0.400L 1.000L
= 205716.6 -304548 (2000.0) FSC20542-3057 1.792 0.721 0.165L 0.956L

  Takamizawa's comment:

  The star may be a semiregular variable  with a range of 13.5-14.3p.

Photographic magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
TmzV837        19940803.592  139p  Tmz.VSOLJ
TmzV837        19940810.644  143p  Tmz.VSOLJ
TmzV837        19940930.544  137p  Tmz.VSOLJ
TmzV837        19941127.394  139p  Tmz.VSOLJ
TmzV837        19950723.663  138p  Tmz.VSOLJ
TmzV837        19950921.518  138p  Tmz.VSOLJ
TmzV837        19951020.433  142p  Tmz.VSOLJ
TmzV837        19960815.559  143p  Tmz.VSOLJ
TmzV837        19970706.694  135p  Tmz.VSOLJ
TmzV837        20011013.435  140p  Tmz.VSOLJ

Observer's code:
  Tmz: K.Takamizawa (Saku-machi,Nagano,Japan)
       SASS (Saku All Sky Survey)
       Inst.: 10cmR F4 twin patrol cameras and 25cm F2.8
       Baker-Schmidt camera T-Max400 120
       Comparison stars mag.:GSC

Relayed from Kesao Takamizawa <k-takamizawa@nifty.ne.jp>

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