Discovered new 7 variable stars

Astronomicalcentre staff in collaboration with:

Mariinsjaya High School, Odessa Ukraine

Odessa National Martime University, Odessa Ukraine

Authors

M.Mogoryan, Natalia Virnina & Fabio Martinelli

Seven New Variables at the Borderline of Pegasus and Lacerta!

One year of work, one year of observation with telescope Meade 10″ focal lenth 1600 DTA cameras with ccd sensor KAF1600

 

1° variable stare, type EA, coordinates: 22 46 57.72, +34 05 55.2

Image:

 

 

 

Light curve

 

 

 

 

1. Secondary minimum: HJD = 2456536.8522.O’Connell effect (O’Connell 1951) is possible. Alternative period is 0d.5549. MinII = 13m.649.

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2° variable star, type EW, coordinates: 22 47 08.02, +34 14 21.6

 

 

 

 

 

Light curve

 

 

 

 

 

 

2. Secondary minimum: HJD = 2456534.8598. MinII = 17m.10

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3° variable star, type EW, coordinates: 22 47 17.68, +34 06 37.2

 

 

 

 

 

Light curve

 

 

 

 

3. Secondary minimum: HJD = 2456535.8633. MinII = 15m.18.

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4° Variable star, type EW, coordinates:  22 48 27.69, +34 13 50.9

 

 

 

 

 

Light curve

 

 

 

 

4. Secondary minima:
HJD = 2456534.8861,
HJD = 2456535.8497,
HJD = 2456536.8155.
MinII = 15m.13. Variable O’Connell effect is possible. Also there is a flat part on the phase curve in the secondary minimum.

 

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5° Variable star, type EA, coordinates: 22 48 34.85, +34 15 22.0

 

 

 

 

 

Light curve

 

 

 

5. Secondary minima: HJD = 2456159.6101, HJD = 2456224.3904, HJD = 2456559.5520.

The phase curve is combined of unfiltered observations, collected in 2012 with Mead 10″ (black points); R-filtered observations obtained in 2013 with the same telescope (blue points); and R-filtered observations, made with the T5 telescope of the iTelescope.net observatory (red points).

 

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6° Variable star, type, EB, coordinates: 22 49 47.54, +34 00 55.8

 

 

 

 

 

Light curve

 

 

 

 

6. Primary minima: HJD = 2456535.9370, HJD = 2456542.7177. MinII = 14m.32. O’Connell effect is clearly present. A total eclipse in the primary minimum is possible. The orbital inclination is close to 90°. Another interesting feature is a rather large difference in minima depths: minI – minII = 0m.28. Despite the shape of the light curve and the period, which are typical of EW-type binaries, the components of this binary do not show thermal contact.

 

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7° Variable star type, EW, coordinates: 22 50 10.69, +34 04 56.3

 

 

 

 

 

Light curve

 

 

 

 

 

 

7. MinII = 14m.97.

 

Full articles:  http://www.astronet.ru/db/varstars/msg/1297456

Tanks to everyone, expecially to Astronomicalcentre staff cause working for telescopes operate every night, and thanks to Agriturismo staff and Mayor Sandro Cerri for his permission of observatory builds.

Have a good 2014!

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