[vsnet-chat 7414] New variable star MisV1441

[Seiichi Yoshida]

Dear colleagues,

I report new variable star discovery in the course of the MISAO
Project (MisV1441).

Seiichi Yoshida, MISAO Project; Youichirou Nakashima, Okayama, Japan,
discovered a new variable star MisV1441.

It was picked up as one of the nova candidates from Youichirou
Nakashima (Okayama, Japan)'s unfiltered CCD images on 2008 May 20 by
the PIXY System 2. Yoshida checked Nakashima and Nobuo Ohkura
(Okayama, Japan)'s CCD images between 2001 and 2007, and found it is a
variable. Its variation was confirmed by Nakashima.

Yoshida identified it with an H-alpha emission star HBHA 50-20.
Yoshida also investigated the 2MASS data, and found it is fairly faint
in the J-band image, fainter than our unfiltered CCD images, although
the color is very red and bright in the Ks-band image.

Patrick Wils and Taichi Kato pointed out that it is identified with an
H alpha emission source IPHAS J205050.39+445011.7.

Taichi Kato also pointed out that it is in a star forming region SFR
G85.49-1.00, and this star seems to be a T Tau variable (possibly INSB
type). 

About the MISAO Project and the PIXY system 2:
  http://www.aerith.net/misao/

------------------------------------------------------------
MisV1441
  R.A.  20h50m50s.42
  Decl. +44o50'11".7  (2000.0)
  Mag.  14.4-15.9C
  Type  INSB?
= HBHA 50-20  20h50m50s.4 +44o50'11"
= IPHAS J205050.39+445011.7  em R=14.796 R-I=1.359 R-Ha=1.103 k UC/Em* MNRAS384,1277
= MSX5C G084.9753+00.4229  20h50m50s.30 +44o50'10".3  InScanError:1.8"  CrossScanError:1.7"  Flux(A):0.93042(var)  Flux(D):1.1963  Flux(E):3.1848
= 2MASS 20505039+4450115  15.412(J)  13.104(H)  11.103(Ks)

http://www.aerith.net/misao/data/misv.cgi?1441

MisV1441 20010719.63330 156C Mis
MisV1441 20010719.63515 155C Mis
MisV1441 20011014.42109 155C Mis
MisV1441 20011014.42306 153C Mis
MisV1441 20070824.60441 158C Mis
MisV1441 20070907.56012 157C Mis
MisV1441 20070919.51979 159C Mis
MisV1441 20070919.52185 157C Mis
MisV1441 20070925.58978 158C Mis
MisV1441 20071005.53148 154C Mis
MisV1441 20071005.53354 155C Mis
MisV1441 20080520.62890 144C Mis
MisV1441 20080520.63094 147C Mis

2001 July 19
  Nobuo Ohkura
  500-mm camera lens + SBIG ST-8

2001 Oct. 14
  Nobuo Ohkura
  0.16-m f/3.8 Wright-Schmidt reflector + SBIG ST-8(ABG)

2007 Aug. 24 - 2008 May 20
  Youichirou Nakashima
  0.25-m f/4.2 Wright-Schmidt reflector + SBIG ST-1001E

--
Seiichi Yoshida
comet at aerith.net
http://www.aerith.net/