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  Abstract / note  

0014New Variable Stars found in the NSVS Database (2)
416 kB
Martin Nicholson, Jane Sutherland2006-01-03
 In 2004 and 2005 a search for variable stars not listed in the General Catalogue of Variable Stars or in Sinbad was conducted by members of the Remote Astronomical Society in the publicly available data of the Northern Sky Variability Survey (NSVS, Wozniak et al., 2004). NSVS fields were searched for candidates with both a sufficient number of observations to allow valid analysis and also with a significantly higher magnitude scatter than normal for stars of their magnitude.

Simbad object(s): USNO-A2.0 1425-10559361, GSC 3941-1661, USNO-A2.0 1425-10540737, TYC 3945-1690-1, GSC 3949-1750, GSC 3937-0551, GSC 3949-1849, GSC 3941-1532, USNO-A2.0 1425-10672862, GSC 3958-0410, TYC 3958-1457-1, USNO-A2.0 1425-11112996, TYC 3586-1200-1, TYC 3955-583-1,


Francois Ochsenbein wrote 2006-01-06:
USNO-A2.0 1425-10540737 (the first star of the list) is a very red star also present in the IRAS catalog
(IRAS F20178+5642)

Wolfgang Renz wrote 2006-05-15:
The amplitudes are given in most cases far too
large. Sometimes by a factor up to 3. The causes
- to us outliers for the determination
- to not consider the noise inherent to the lc
- to round to increase the amplitude

I would suggest the following more conservative
amplitudes for the given light curves:
Star Paper Conservative
USNO-A2.0 1425-10540737 12.1-12.9 12.35-12.65
GSC 3941-1661 11.3-11.7 11.45-11.60
USNO-A2.0 1425-10559361 11.6-12.2 11.80-12.10
TYC 3945-1690-1 10.1-10.5 10.30-10.45
GSC 3949-1750 12.1-12.5 12.15-12.40
GSC 3937-0551 11.5-11.9 11.55-11.75
GSC 3949-1849 9.9-10.3 10.00-10.20
GSC 3941-1532 10.5-11.0 10.60-10.90
USNO-A2.0 1425-10672862 12.2-12.9 12.30-12.70
GSC 3958-0410 10.7-11.0 10.72-10.85
TYC 3958-1457-1 11.1-11.4 11.10-11.30
USNO-A2.0 1425-11112996 11.9-12.4 11.90-12.40
TYC 3586-1200-1 11.8-12.5 11.90-12.45
TYC 3955-583-1 11.10-11.30 11.13-11.27

As the NSVS color converts the used Tycho mags
to a R band like system, the mag values can be
considered as CR mags (unfiltered, red sensitive
CCD, using R band mags).

Sebastian Otero wrote 2008-07-19:
The periods for the stars TYC 3945-1690-1 and USNO-A2.0 1425-11112996 are half the value given, I don't understand why two cycles per period have been used for these two cases and not for the rest of the stars. Also, there is no apparent reason for the uncertainty in the EA-classification for TYC 3586-1200-1

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