Peremennye Zvezdy

"Peremennye Zvezdy",
Prilozhenie
,
vol. 17, N 3 (2017)

Variable Stars in Cygnus Discovered with Kourovka Planet Search. Part III: Pulsating variables of Delta Scuti type

A. A. Popov#1, A. M. Zubareva#2,3, A. Y. Burdanov#4, V. V. Krushinsky#1, E. A. Avvakumova#1, K. Ivanov#5
#1. Kourovka Astronomical Observatory of Ural Federal University, Ekaterinburg, Russia;
#2. Institute of Astronomy, Russian Academy of Sciences, Moscow, Russia;
#3. Sternberg Astronomical Institute, Lomonosov Moscow State University, Moscow, Russia;
#4. Space sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, Liège, Belgium;
#5. Irkutsk State University, Irkutsk, Russia.

Received:   11.12.2017;   accepted:   25.12.2017
(E-mail for contact: apopov66@gmail.com)


#NameOtherCoord (J2000)TypeMaxMinSystemPeriodEpoch (JD)typeSpCommentL.CurveFind.ChartData
1 2MASS 20250468+502658020 25 04.68 +50 26 58.0DSCT14.00814.037R0.065432456131.40max  TF1-01345_lc.pngTF1-01345_fc.pngTF1-01345.txt
2 2MASS 20262340+500536520 26 23.40 +50 05 36.5DSCT12.74912.769R0.132742456140.32max Comm. 2TF1-03831_lc.pngTF1-03831_fc.pngTF1-03831.txt
3 2MASS 20274366+494436020 27 43.66 +49 44 36.0DSCT11.34611.362R0.041842456154.24max  TF1-06321_lc.pngTF1-06321_fc.pngTF1-06321.txt
4 2MASS 20274367+502130020 27 43.67 +50 21 30.0DSCT12.39012.403R0.047582456131.33max  TF1-06322_lc.pngTF1-06322_fc.pngTF1-06322.txt
5 2MASS 20274485+502539520 27 44.85 +50 25 39.5DSCT10.79510.800R0.051672456063.30max  TF1-06358_lc.pngTF1-06358_fc.pngTF1-06358.txt
6 2MASS 20274663+512146120 27 46.63 +51 21 46.1DSCT12.82212.836R0.070532456160.27max  TF1-06411_lc.pngTF1-06411_fc.pngTF1-06411.txt
7 2MASS 20274915+493559920 27 49.15 +49 35 59.9DSCT12.05812.080R0.080192456135.34max  TF1-06492_lc.pngTF1-06492_fc.pngTF1-06492.txt
8 2MASS 20284384+503125220 28 43.84 +50 31 25.2DSCT12.76112.779R0.219392456160.44max  TF1-08235_lc.pngTF1-08235_fc.pngTF1-08235.txt
9 2MASS 20291369+504324720 29 13.69 +50 43 24.7DSCT12.58812.614R0.128952456161.43max Comm. 9TF1-09161_lc.pngTF1-09161_fc.pngTF1-09161.txt
10 2MASS 20291725+494357020 29 17.25 +49 43 57.0DSCT12.73912.772R0.130932456160.46max Comm. 10TF1-09262_lc.pngTF1-09262_fc.pngTF1-09262.txt
11 2MASS 20292279+501801520 29 22.79 +50 18 01.5DSCT13.87813.912R0.170062456155.33max Comm. 11TF1-09453_lc.pngTF1-09453_fc.pngTF1-09453.txt
12 2MASS 20294536+503254020 29 45.36 +50 32 54.0DSCT10.73210.742R0.096542456141.39max  TF1-10158_lc.pngTF1-10158_fc.pngTF1-10158.txt
13 2MASS 20294695+493054720 29 46.95 +49 30 54.7DSCT11.34711.352R0.062892456169.42max  TF1-10201_lc.pngTF1-10201_fc.pngTF1-10201.txt
14 2MASS 20295420+503231520 29 54.20 +50 32 31.5DSCT12.38512.407R0.195452456168.23max  TF1-10484_lc.pngTF1-10484_fc.pngTF1-10484.txt
15 2MASS 20302031+494311720 30 20.31 +49 43 11.7DSCT11.97011.976R0.058012456131.38max Comm. 15TF1-11402_lc.pngTF1-11402_fc.pngTF1-11402.txt
16 2MASS 20304189+495726920 30 41.89 +49 57 26.9DSCT11.64911.656R0.077872456168.30max  TF1-12151_lc.pngTF1-12151_fc.pngTF1-12151.txt
17 2MASS 20304930+510459520 30 49.30 +51 04 59.5DSCT11.12811.138R0.052662456124.29max  TF1-12383_lc.pngTF1-12383_fc.pngTF1-12383.txt
18 2MASS 20310164+501414720 31 01.64 +50 14 14.7DSCT11.73611.744R0.078322456161.36max  TF1-12817_lc.pngTF1-12817_fc.pngTF1-12817.txt
19 2MASS 20311156+511110520 31 11.56 +51 11 10.5DSCT11.25111.292R0.060232456160.44max  TF1-13160_lc.pngTF1-13160_fc.pngTF1-13160.txt
20 2MASS 20311900+494637820 31 19.00 +49 46 37.8DSCT11.49311.522R0.068082456148.34max  TF1-13402_lc.pngTF1-13402_fc.pngTF1-13402.txt
21 2MASS 20320758+504447020 32 07.58 +50 44 47.0DSCT11.71111.721R0.083172456141.39max  TF1-14972_lc.pngTF1-14972_fc.pngTF1-14972.txt
22 2MASS 20324010+503636820 32 40.10 +50 36 36.8DSCT11.52911.537R0.167852456163.45max  TF1-16032_lc.pngTF1-16032_fc.pngTF1-16032.txt
23 2MASS 20325225+505426920 32 52.25 +50 54 26.9DSCT12.62512.635R0.065992456148.30max  TF1-16430_lc.pngTF1-16430_fc.pngTF1-16430.txt
24 2MASS 20341630+504336220 34 16.30 +50 43 36.2DSCT11.35711.362R0.048672456131.35max  TF1-19254_lc.pngTF1-19254_fc.pngTF1-19254.txt
25 2MASS 20341779+504136820 34 17.79 +50 41 36.8DSCT10.96510.976R0.104452456124.33max  TF1-19306_lc.pngTF1-19306_fc.pngTF1-19306.txt
26 2MASS 20343224+494558920 34 32.24 +49 45 58.9DSCT9.9179.934R0.134872456152.25max Comm. 26TF1-19788_lc.pngTF1-19788_fc.pngTF1-19788.txt
27 2MASS 20344974+495315520 34 49.74 +49 53 15.5DSCT12.13812.159R0.083972456167.38max  TF1-20383_lc.pngTF1-20383_fc.pngTF1-20383.txt

Comments:


2. There is a second periodicity P = 0d.11972.

9. There is a second periodicity P = 0d.12126.

10. There is a second periodicity P = 0d.13658.

11. There are long-period changes of brightness.

15. There is a second periodicity P = 0d.05356.

26. There is a second periodicity P = 0d.15328.

Remarks:
In the current paper, we continue to announce new variable stars discovered in the frame of the KPS (Kourovka Planet Search). Detailed information about the project and about Algol-type eclipsing binaries we detected is provided in the first paper (Popov et al. 2015), and eclipsing binaries of β Lyrae and W Ursae Majoris- types are presented in the second paper (Popov et al. 2016).

This paper is dedicated to pulsating variables of the δ Scuti type. We discovered 27 such stars.

Each figure consist of three panels. In the upper part, we provide the power spectrum obtained using the on-line light curve analysis tool by Kirill Sokolovsky. The lower part of each figure has two panels. The star’s instrumental magnitude as a function of Julian Date is given in the left panel, and the phase-folded light curve is given in the right panel. We used red colour for R band, green colour for V band, and blue colour for B band data.

Acknowledgements:

This work has been supported by Russian Foundation for Basic Research grants 14-02-31338 and, partially, 14-02-31056.

The authors wish to thank Dr. Kirill Sokolovsky for providing the on-line lightcurve analysis tool.

This research made use of Aladin (Bonnarel et al., 2000), SIMBAD database (operated at the Centre de Données astronomiques de Strasbourg), the International Variable Star Index (VSX) database (operated at AAVSO, Massachusetts, USA), PyRAF (product of the Space Telescope Science Institute, operated by AURA for NASA), and the NASA/IPAC Extragalactic Database (NED) (operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration).

References:
Bonnarel, F., Fernique, P., Bienaymé, O., et al. 2000, Astron. and Astrophys. Suppl., 143, 33
Popov, A. A., Burdanov, A. Y., Zubareva, A. M., Krushinsky, V. V., Avvakumova, E. A., Ivanov, K. I., 2015, Perem. Zvezdy Prilozh., 15, No. 7
Popov, A. A., Burdanov, A. Y., Zubareva, A. M., Krushinsky, V. V., Avvakumova, E. A., Ivanov, K. I., 2016, Perem. Zvezdy Prilozh., 16, No. 5



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