Peremennye Zvezdy

Article in PDF
"Peremennye Zvezdy",
Prilozhenie
,
vol. 8, N 44 (2008)

Variability of TYC 2760 00635 1

A. V. Khruslov
Russia, Tula

ISSN 2221–0474

Received:   24.09.2008;   accepted:   24.11.2008
(E-mail for contact: khruslov@bk.ru)


Star Name: TYC 2760 00635 1, GSC 2760-00635, NSVS 6222336, NSVS 9025123, 1RXS J232138.5+344259
Coordinates (J2000): 23 21 38.80, +34 42 51.8
Variability type: EA/RS;   Limits, System: 11.7 - 12.2 (R);    
Period: 4.243  d;   Epoch(min): JD 2451445.84

Remarks:
The variability of TYC 2760 00635 1 was reported by Damerdji et al. (2007). The star's type was not determined. The possible period, P=3.7648 d, was accompanied with a comment: "Bad sampling, period probably wrong". Later Bernhard and Lloyd (2008) investigated the star using the ROTSE-I/NSVS data (Wozniak et al. 2004). The variable was identified with an X-ray source 1RXS J232138.5+344259 and classified as a likely RS CVn star without eclipses, its period being 2.12082 days. A big scattering on the phased light curve suggests that eclipses, not revealed by the authors, can exist in the NSVS data.

I reinvestigated the star using the same ROTSE-I/NSVS data. The observations were analyzed using the period-search software developed by Dr. V.P. Goranskij for Windows environment. In fact, TYC 2760 00635 1 is an eclipsing variable, EA subtype, with a period of 4.243 days. A distortion wave characteristic of RS CVn stars overlaps the eclipsing light curve. MinII = 11.95, D = 0.17P.

References:
Bernhard, K., Lloyd, C., 2008, OEJV, 89
Damerdji, Y., Klotz, A., Boër, M., 2007, Astron. J., 133, 1470
Wozniak, P.R., Vestrand, W.T., Akerlof, C.W., et al., 2004, Astron. J., 127, 2436

Light Curve
Variability of TYC 2760 00635 1


Main Page | Search
Astronet | SAI | INASAN

Report problems