Peremennye Zvezdy

"Peremennye Zvezdy",
Prilozhenie
,
vol. 18, N 3 (2018)

Investigation and New Light Elements of 15 Variable Stars

E. V. Kazarovets, E. N. Pastukhova
Institute of Astronomy, Russian Academy of Sciences, Moscow, Russia

Received:   21.11.2018;   accepted:   28.12.2018
(E-mail for contact: helene@inasan.ru, pastukhova@sai.msu.ru)


#NameOtherCoord (J2000)TypeMaxMinSystemPeriodEpoch (JD)typeSpCommentL.CurveFind.ChartData
1 GSC 7955-0128220 02 30.84, -41 59 47.6RRC14.8415.18CV0.3354292456219.941max Comm. 11lc.jpg1ch.jpg1.txt
2 GSC 9090-0146520 07 55.69, -63 19 16.5DSCT13.6613.87V0.04435982458303.8367max Comm. 22lc.jpg2ch.jpg2.txt
3 IRAS 20052-145720 08 01.34, -14 48 19.0SR14.215.0V2142458193max Comm. 33lc.jpg3ch.jpg3.txt
4NSV 12877AN 380.193320 10 45.33, +47 29 55.8SR11.713.4V1282457264max Comm. 44lc.jpg4ch.jpg4.txt
5NSV 12885AN 444.193420 10 50.05, +52 19 23.6M12.315.2V2272458207max  5lc.jpg5ch.jpg5.txt
6NSV 12876S 732020 12 24.28, -37 32 39.3RRAB15.8516.36CV0.644752456155.043max Comm. 66lc.jpg6ch.jpg6.txt
7NSV 12895S 732420 13 29.41, -37 48 40.4RRC15.8316.28CV0.3317722456219.910max Comm. 77lc.jpg7ch.jpg7.txt
8NSV 12964S 788720 14 31.98, +61 04 25.6SR12.213.4V5752457631max Comm. 88lc.jpg8ch.jpg8.txt
9 UCAC3 231-24315520 34 50.79, +25 24 40.8EB12.5812.92V1.2143902457973.92min Comm. 99lc.jpg9ch.jpg9.txt
10 ASAS J203921+1746.220 39 20.86, +17 46 11.8EW10.7210.96V0.3755742457112.124minF8Comm. 1010lc.jpg10ch.jpgASAS 203921+1746.2
11 GSC 2696-0286620 56 05.54, +35 10 07.7EW12.2212.47V0.774552458345.037min Comm. 1111lc.jpg11ch.jpg11.txt
12 GSC 2190-0201921 16 26.84, +25 17 36.7EW14.0714.48V0.2174082458281.959min Comm. 1212lc.jpg12ch.jpg12.txt
13 USNO-A2.0 1425-1261720121 59 08.17, +59 13 16.1EA13.8014.32V20.32852458337.94min Comm. 1313lc.jpg13ch.jpg13.txt
14NSV 13999GSC 8001-0110322 02 18.88, -43 05 18.9UGZ:13.416.6V  other  14lc.jpg14ch.jpg14.txt
15 GSC 3632-0133722 39 58.33, +50 54 26.0EB11.6212.13V0.6269552457935.072min Comm. 1515lc.jpg15ch.jpg15.txt

Comments:


1. The star was independently discovered by us and by the ASAS-SN patrol patrol team. Our results from the Table were obtained using the CRTS archive data (SSS_J200226.6-415932) for interval JD 2453556–2456460. The ASAS-SN Catalog of Variable Stars (Jayasinghe et al. 2018) gives light elements HJD 2456912.61015 + 0.3354747d x E, range V = 14.77–15.10 for interval JD 2456790–2458187. Period strongly varies.

2. We discovered the star using the CRTS archive data (SSS_J200755.7-631916). M–m = 0.44 P.

3. The star was included in the ASAS-SN Catalog of Variable Stars with a wrong P, 155d.0.

4. The star was included in the ASAS-SN Catalog of Variable Stars without period, type L.

6. M–m = 0.22 P.

7. M–m = 0.40 P.

8. The star was included in the ASAS-SN Catalog of Variable Stars without period, type L.

9. MinII = 12.84 V. The star was included in the ASAS-SN Catalog of Variable Stars with a wrong type RRAB and P, 0d.6071846.

10. MinII = 10.94 V. Period from the International Variable Star Index according to Watson et al. (2007) is erroneous: P = 0d.316057.

11. MinII = 12.46 V.

12. MinII = 14.46 V. A SuperWASP variable object 1SWASP J211625.31+251755.4 (Lohr et al. 2013) is at 30" NW from the real variable star.

13. MinII = 14.17 V, MinII–MinI = 0.55 P, D = 0.02 P. Lapukhin et al. (2015) published a wrong period of 5d.756:.

15. MinII = 11.91 V. The International Variable Star Index gives a wrong type and an erroneous P, 0d.62690100. The coordinates point 25" SE from the real variable star.

Remarks:
While working on compiling of the Name-List No. 82 for Version 5.1 of GCVS (Samus et al. 2017), we determined or improved light elements, types, and coordinates for 9 new variable stars and 6 stars from the NSV catalogue (Kukarkin et al. 1982). The study of the variables was made using the publicly available electronic archives of CCD observations of the ASAS-3 project (Pojmanski 2002), ASAS-SN project (Shappee et al. 2014, Kochanek et al. 2017) and the Catalina Sky Survey (CRTS) photometric data (Drake et al. 2009). To find periods we applied the WinEfk software provided by Dr. V.P. Goranskij.

References:
Drake, A.J., Djorgovski, S.G., Mahabal, A., et al., 2009, Astrophys. J., 696, 870
Jayasinghe, T., Kochanek, C. S., Stanek, K. Z., et al., 2018, Mon. Not. Royal Astron. Soc., 477, No. 3, 3145
Kochanek, C. S., Shappee, B. J., Stanek, K. Z., et al., 2017, Publ. Astron. Soc. Pacific, 129, No. 980, 104502
Kukarkin, B. V., Kholopov, P. N., et al., 1982, New catalogue of suspected variable stars. Moscow: "Nauka"
Lapukhin, E.G., Veselkov, S.A., Zubareva, A.M., 2015, Perem. Zvezdy Prilozh., 15, No. 8
Lohr, M. E., Norton, A. J., Kolb, U. C., et al., 2013, Astron. Astrophys., 549, 86
Pojmanski, G., 2002, Acta Astron., 52, 397
Samus, N.N., Kazarovets, E.V., Durlevich, O.V., Kireeva, N.N., Pastukhova, E.N., 2017, General Catalogue of Variable Stars: Version GCVS 5.1, Astron. Rep., 61, No. 1, 80
Shapee, B. J., Prieto, J. L., Grupe, D., et al., 2014, Astrophys. J., 788, No. 1, 48
Watson, C. L., Henden, A. A. , Price, A., 2007, J. Amer. Assoc. Var. Stars Obs. , 35, No. 2, 414



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