[vsnet-chat 7266] MisV1339: SR Variable with a Short Term Oscillation

[Seiichi Yoshida]

Dear colleagues,

Kazuhiro Nakajima discovered a new semi regular variable with a short
term oscillation MisV1339.

  http://www.aerith.net/misao/data/misv.cgi?1339

MisV1339
  R.A.   03h04m34s.90
  Decl.  +57o09'35".0  (2000.0)
  Mag.   10.02-10.27C
  Type   SR:
= GSC 3709-00631  03h04m34s.82 +57o09'35".6  Error:0.3"  Mag:9.75  MagError:0.40  Band:1  Class:0  Plate:036E  Flag:T  Epoch:11 OCT 1983
= GSC 3709-00631  03h04m34s.96 +57o09'34".6  Error:0.3"  Mag:10.02  MagError:0.40  Band:1  Class:0  Plate:01W1  Flag:T  Epoch:04 NOV 1983
= USNO-A2.0 1425.04109032  03h04m34s.885 +57o09'35".17  Mag(R):10.3

The light curve suggests it is a semi regular variable with an
unfiltered CCD amplitude of 0.25 mag between 10.02 - 10.27 mag.

Not only the long term variation, a short term oscillation with an
amplitude of 0.10 mag was also confirmed by the time series photometry
on three nights.

MisV1339 is almost constant at 10.323 +/- 0.022 mag in the NSVS data.

  http://skydot.lanl.gov/nsvs/star.php?num=1942992&mask=32004

Any comments on this star's type or so are welcome. Observations are
encouraged.

Best regards,

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