CC BY
17"Peremennye Zvezdy", Prilozhenle,
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)
#| Name Other Coord (J2000) IyP-£ Max Min System Period Epoch (JD) type Sp Comment L.Curve Find.Chart Data
1 GSC 7955-01282 20 02 30.84, -41 59 47.6 RRC 14.84 15.18 CV 0.335429 2456219.941 max Comm. 1 Ik-jpg 1ch.jpg 1.txt
2 GSC 9090-01465 20 07 55.69, -63 19 16.5 DSCT 13.66 13.87 V 0.0443598 2458303.8367 max Comm. 2 21c.jpg 2ch.jpg 2.txt
3 IRAS 20052-1457 20 08 01.34, -14 48 19.0 SR 14.2 15.0 V 214 2458193 max Comm. 3 3k.jpg 3ch.jpg 3.txt
4 NSV 12877 AN 380.1933 20 10 45.33, +47 29 55.8 SR 11.7 13.4 V 128 2457264 max Comm. 4 41c.jpg 4ch.jpg 4.txt
5 NSV 12885 AN 444.1934 20 10 50.05, +52 19 23.6 M 12.3 15.2 V 227 2458207 max 5ic.jpg 5ch.jpg 5.txt
6 NSV 12876 S 7320 20 12 24.28, -37 32 39.3 RRAB 15.85 16.36 CV 0.64475 2456155.043 max Comm. 6 61c.jpg 6ch.jpg 6.txt
7 NSV 12895 S 7324 20 13 29.41, -37 48 40.4 RRC 15.83 16.28 CV 0.331772 2456219.910 max Comm. 7 2k.jpg 7ch.jpg 7.txt
8 NSV 12964 S 7887 20 14 31.98, +61 04 25.6 SR 12.2 13.4 V 575 2457631 max Comm. 8 81c.jpg 8ch.jpg 8.txt
9 UCAC3 231-243155 20 34 50.79, +25 24 40.8 EB 12.58 12.92 V 1.214390 2457973.92 min Comm. 9 91c.jpg 9ch.jpg 9.txt
10 ASAS J203921+1746.2 20 39 20.86, +17 46 11.8 EW 10.72 10.96 V 0.375574 2457112.124 min F8 Comm. 10 101c.jpg 10ch.jpg ASAS 203921+1746.2
11 GSC 2696-02866 20 56 05.54, +35 10 07.7 EW 12.22 12.47 V 0.77455 2458345.037 min Comm. 11 111c.jpg 11ch.jpg 11.txt
12 GSC 2190-02019 21 16 26.84, +25 17 36.7 EW 14.07 14.48 V 0.217408 2458281.959 min Comm. 12 121c.jpg 12ch.jpg 12.txt
13 USN0-A2.0 1425-12617201 21 59 08.17, +59 13 16.1 EA 13.80 14.32 V 20.3285 2458337.94 min Comm. 13 131c.jpg 13ch.jpg 13.txt
14 NSV 13999 GSC 8001-01103 22 02 18.88, -43 05 18.9 UGZ: 13.4 16.6 V other 141c.jpg 14ch.jpg 14.txt
15 GSC 3632-01337 22 39 58.33, +50 54 26.0 EB 11.62 12.13 V 0.626955 2457935.072 min Comm. 15 151c.jpg 15ch.jpg 15.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. Minll = 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. Minll = 10.94 V. Period from the International Variable Star Index according to Watson et al. (2007) is erroneous: P = 0d316057.
11. Minll = 12.46 V.
12. Minll = 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. Minll = 14.17 V, Minll-MinI = 0.55 P, D = 0.02 P. Lapukhin et al. (2015) published a wrong period of 5d.756:.
15. Minll = 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., Dj orgovski, 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
