Peremennye Zvezdy

"Peremennye Zvezdy",
Prilozhenie
,
vol. 17, N 4 (2017)

New Variable Stars III

A. V. Khruslov#1,2
#1. Sternberg Astronomical Institute, Lomonosov Moscow State University, Moscow, Russia;
#2. Institute of Astronomy, Russian Academy of Sciences, Moscow, Russia.

Received:   21.02.2014;   accepted:   26.12.2017
(E-mail for contact: khruslov@bk.ru)


#NameOtherCoord (J2000)TypeMaxMinSystemPeriodEpoch (JD)typeSpCommentL.CurveFind.ChartData
1 USNO-B1.0 1076-020084208 58 42.80, +17 39 25.3EA17.3517.81CV0.8318062455201.1983min Comm. 11.PNGchart1.PNGMLS_data_1.txt
2 GSC 2986-0033809 04 21.04, +41 55 12.9BY14.1714.65CV13.1012455008.1max Comm. 22.PNGchart2.PNGNSVS 4829404 CSS_data_2.txt 1SWASP_data_2.txt
3 TYC 3427 00673 109 06 29.00, +49 34 22.2EW11.5811.78WASP0.5127132454500.715min Comm. 33.PNGchart3.PNGNSVS 4851790 CSS_data_3.txt 1SWASP_data_3.txt
4 GSC 2987-0152409 07 29.26, +42 28 05.5RS11.912.15R24.72451298min Comm. 44.PNGchart4.PNGNSVS 4830838 1SWASP_data_4.txt
5 TYC 2987 01505 109 08 47.09, +42 29 14.9RS10.6710.81WASP4.9482454504.0max Comm. 55.PNGchart5.PNGNSVS 4831470 1SWASP_data_5.txt
6 GSC 3424-0154709 10 39.89, +45 57 01.6EW12.7312.83WASP0.26239252454500.580min Comm. 66.PNGchart6.PNGNSVS 4831740 NSVS 4854277 1SWASP_data_6.txt
7 GSC 2987-0045209 12 22.64, +40 25 30.7BY12.3612.41WASP3.4222454300.45max Comm. 77.PNGchart7.PNGNSVS 4833589 1SWASP_data_7.txt
8 GSC 3430-0082909 13 22.83, +51 35 04.3EB12.3512.62WASP0.9158012454520.658min Comm. 88.PNGchart8.PNGNSVS 4854386 NSVS 2513647 NSVS 4866118 1SWASP_data_8.txt
9 TYC 3431 00222 109 18 21.28, +51 07 46.3LB11.3911.65WASP  other Comm. 99.PNGchart9.PNGNSVS 4856655 NSVS 4867683 1SWASP_data_9.txt
10 TYC 2997 00619 109 21 40.84, +43 47 47.8EB11.8411.99WASP0.9314802454510.570min Comm. 1010.PNGchart10.PNGNSVS 4837326 NSVS 4885786 1SWASP_data_10.txt
11 TYC 3429 01053 109 35 25.20, +49 38 29.4EA/RS:12.0512.25R1.3265032451452.76min Comm. 1111.PNGchart11.PNGNSVS 4863877 NSVS 4873744 1SWASP_data_11.txt
12 TYC 3426 01518 109 42 05.19, +47 22 03.5RS10.1910.38R40.72451579min Comm. 1212.PNGchart12.PNGNSVS 4875978
13 GSC 2999-0112009 47 50.50, +44 02 38.5EW13.8514.15CV0.6649052455000.935min Comm. 1313.PNGchart13.PNGNSVS 4896685 CSS_data_13.txt
14 GSC 2999-0121309 49 37.12, +42 33 59.7BY13.413.8CV19.2082455005.0max Comm. 1414.PNGchart14.PNGNSVS 4897261 CSS_data_14.txt 1SWASP_data_14.txt
15 TYC 2996 01179 109 49 57.51, +40 56 26.2LB11.1511.35R  other Comm. 1515.PNGchart15.PNGNSVS 4897238 1SWASP_data_15.txt
16 GSC 2999-0004709 53 30.31, +44 17 01.0BY13.4013.76CV6.38352455014.9max Comm. 1616.PNGchart16.PNGNSVS 4898989 CSS_data_16.txt
17 GSC 3439-0098709 54 22.20, +50 56 49.8EW13.5713.77CV0.2572422455000.572min Comm. 1717.PNGchart17.PNGNSVS 4881097 CSS_data_17.txt
18 GSC 2999-0067509 54 59.69, +43 36 27.1EA/RS:12.212.7WASP6.59832454120.555min Comm. 1818.PNGchart18.PNGNSVS 4899538 1SWASP_data_18.txt
19 GSC 2999-0060409 55 39.35, +43 19 17.9EA/RS12.4812.90WASP3.707662454150.55min Comm. 1919.PNGchart19.PNGNSVS 4899798 1SWASP_data_19.txt
20 GSC 2996-0041409 56 00.66, +40 41 28.8BY:12.2112.44R0.271792451500.863max Comm. 2020.PNGchart20.PNGNSVS 4899795 1SWASP_data_20.txt
21 TYC 3434 00104 110 02 03.67, +46 05 04.4ELL10.3810.46R0.3940892451600.510min Comm. 2121.PNGchart21.PNGNSVS 4883615 NSVS 4902224 1SWASP_data_21.txt
22 GSC 3434-0078510 14 06.26, +46 27 01.4EB13.2413.83CV0.4116362455000.589min Comm. 2222.PNGchart22.PNGNSVS 4906384 NSVS 4924202 CSS_data_22.txt
23 GSC 3004-0086810 19 09.72, +41 46 11.0EW12.7212.87WASP0.4494142454150.825min Comm. 2323.PNGchart23.PNGNSVS 4908487 1SWASP_data_23.txt
24 USNO-A2.0 1350-1417804121 29 05.79, +50 20 07.0EW13.6514.25WASP0.4946732454330.512min Comm. 2424.PNGchart24.PNGNSVS 5864781 NSVS 5966138 1SWASP_data_24.txt
25 USNO-B1.0 1036-060631621 55 07.26, +13 41 12.3EA15.3017.42CV1.9260812455001.837min Comm. 2525.PNGchart25.PNGCSS_data_25.txt

Comments:


1. The twice longer period is not excluded. A bright close companion, variable CSS_J085842.7+173936 (type RRC, Drake et al. 2014), is in 12''.

2. J–K = 0.496 (2MASS). From 1SWASP data, 14m.35 – 14m.6; from ROTSE-I/NSVS data, 14m.2 – 14m.6 in the R band. According to NSVS data, the light elements are: JD(max) = 2451504.2 + 13d.2×E. Combined brightness of three stars, GSC 2986-00338 and fainter ones, USNO-A2.0 1275-07437120 and USNO-A2.0 1275-07437162, was measured in the NSVS and 1SWASP, the tabulated amplitudes are considerably underestimated. The ROTSE data with photometric correction flags were kept for the analysis.

3. MinII = 11.76 (WASP). From CSS data, 11m.6 – 11m.85 (CV); from ROTSE-I/NSVS data, 11m.74 – 11m.93, MinII = 11m.91 in the R band.

4. X-ray sources 1WGA J0907.4+4228, 1RXP J090728+4227.8 and 2RXP J090729.3+422723. From 1SWASP data, 12m.05 – 12m.15. According to 1SWASP data, the light elements are: JD(min) = 2454535. + 25d.8×E. The light curve shape and period vary. J–K = 0.616 (2MASS).

5. X-ray sources 1WGA J0908.7+4229, 1RXP J090847+4229.1 and 2RXP J090847.8+422904. From ROTSE-I/NSVS data, 10m.75 – 10m.87 in the R band. B–V = 0.718 (Tycho2), J–K = 0.411 (2MASS). A star with a considerable proper motion (in the Tycho-2 catalog, pmRA(mas/yr) = –65.8; pmDE(mas/yr) = –37.6 ).

6. From 1SWASP data, 12m.73 – 12m.83, MinII = 12.82; from ROTSE-I/NSVS data, 12m.9 – 13m.0 in the R band. Combined brightness of two stars, GSC 3424-01547 and GSC 3424-00988, was measured in NSVS and 1SWASP, the tabulated amplitudes are possibly slightly underestimated. According to CSS data GSC 3424-00988 is constant star and GSC 3424-01547 is the variable star. Because of the large uncertainties the CSS data were rejected.

7. From ROTSE-I/NSVS data, 12m.35 – 12m.45 in the R band. According to NSVS data, the light elements are: JD(max) = 2451453.65 + 3d.427×E. J–K = 0.401 (2MASS). The star has a faint close companion USNO-B1.0 1304-0198089.

8. MinII = 12m.48 (WASP). From ROTSE-I/NSVS data, 12m.35 – 12m.6, MinII = 12m.45 in the R band.

9. From ROTSE-I/NSVS data, 10m.5 – 10m.7 in the R band. The ROTSE data with photometric correction flags were kept for the analysis. Probably can be identified with IRAS F09148+5120. B–V = 1.887 (Tycho2), J–K = 1.163 (2MASS). Type SR is also not excluded.

10. MinII = 11.94 (WASP). From ROTSE-I/NSVS data, 12m.29 – 12m.43, MinII = 12m.38 in the R band. The ROTSE data with photometric correction flags were kept for the analysis.

11. X-ray sources 1WGA J0935.4+4938, 1RXP J093525+4938.5, 2RXP J093525.3+493830 and 1RXS J093521.9+493822. D = 0.14 P. From 1SWASP data, 12m.2 – 12m.45. B–V = 0.328 (Tycho2), J–K = 0.554 (2MASS). According to WASP data, shape of the light curve and the depth of minima are possibly subject to changes.

12. X-ray sources 1WGA J0942.0+4722, 1RXP J094206+4722.2, 2RXP J094205.6+472203. B–V = 1.255 (Tycho2), J–K = 0.731 (2MASS).

13. MinII = 14m.10 (CV). From ROTSE-I/NSVS data, 14m.0 – 14m.3 in the R band. Combined brightness of two stars, GSC 2999-01120 (=var) and USNO-A2.0 1275-07588822, was measured in the NSVS, the tabulated amplitudes are possibly slightly underestimated.

14. From 1SWASP data, 13m.9 – 14m.1; from ROTSE-I/NSVS data, 13m.6 – 13m.85 in the R band. According to NSVS data, the light elements are: JD(max) = 2451507.3 + 19d.2×E; double wave in NSVS. J–K = 0.718 (2MASS).

15. From 1SWASP data, 11m.55 – 11m.7. B–V = 1.652 (Tycho2), J–K = 0.984 (2MASS).

16. From ROTSE-I/NSVS data, 13m.6 – 13m.95 in the R band. P = 1.1858 days is not excluded. J–K = 0.700 (2MASS).

17. MinII = 13m.76 (CV). From ROTSE-I/NSVS data, 13m.7 – 13m.9 in the R band. The star has a faint close companion USNO-B1.0 1409-0212238.

18. D = 0.07 P. From ROTSE-I/NSVS data, 12m.1 – 12m.6 in the R band.

19. D = 0.08 P. From ROTSE-I/NSVS data, 12m.2 – 12m.55 in the R band. The light elements of the distortion wave: JD(max) = 2451451.6 + 3d.697×E. The ROTSE data with photometric correction flags were kept for the analysis.

20. From 1SWASP data, 12m.56 – 12m.64. According to 1SWASP data, the light elements are: JD(max) = 2454150.570 + 0d.27185×E. J–K = 0.618 (2MASS).

21. The ROTSE data with photometric correction flags were kept for the analysis. The star's mean brightness variations were subtracted in the 1SWASP light curve. The star was independently discovered by Ivan Sergey.

22. MinII = 13m.66 (CV). From ROTSE-I/NSVS data, 13m.5 – 13m.9 in the R band. In CSS data mean brightness varies. The star was independently discovered by Ivan Sergey, Sergei Dubrovski, and Astrobloknot Team.

23. MinII = 12m.84 (WASP). From ROTSE-I/NSVS data, 12m.7 – 12m.85 in the R band.

24. MinII = 14m.25 (WASP). From ROTSE-I/NSVS data, 13m.4 – 14m.0 in the R band. The ROTSE data with photometric correction flags were kept for the analysis.

25. MinII = 15.52 (CV); D = 0.11 P. A close companion, variable CSS_J215508.0+134117 (type RRC, Drake et al. 2014), is in 12'' from the star.

Remarks:
I present a discovery of 25 new variable stars. My search for variables was carried out in the publicly available data of the Northern Sky Variability Survey (NSVS, Woźniak et al. 2004). Besides, to improve classification and light elements, I analyzed all available observations of these stars from the Catalina Surveys (Drake et al. 2009) and SuperWASP (Butters et al. 2010). The sky area with RA between 08h 45m and 10h 20m, Dec between +40° and +52° was searched. Three stars (No. 1, 24, 25) are not in the mentioned field. I discovered the variability of No. 1 and No. 25 while investigating stars of RRC type from Catalina Surveys catalog (Drake et al. 2014).

These observations were analyzed using the period-search software developed by Dr. V.P. Goranskij for Windows environment. The coordinates were drawn either from the Tycho-2 or from the 2MASS catalogs.

The SuperWASP observations are available as FITS tables, which were converted into ASCII tables using the OMC2ASCII program as described by Sokolovsky (2007).

Acknowledgements: Thanks are due to Dr. K.V. Sokolovsky for his advice concerning data retrieving. The author wishes to thank Dr. V.P. Goranskij for providing his software. This study was supported by the Program "Non-stationary Phenomena of Objects in the Universe" of the Presidium of Russian Academy of Sciences.

References:
Butters, O.W., West, R.G., Anderson, D.R., et al., 2010, Astron. and Astrophys., 520, L10
Drake, A.J., Djorgovski, S.G., Mahabal, A., et al., 2009, Astrophys. J., 696, 870
Drake, A.J., Graham, M.J., Djorgovski, S.G., et al., 2014, Astrophys. J. Suppl., 213, 9
Sokolovsky, K.V., 2007, Perem. Zvezdy Prilozh., 7, No. 30
Woźniak, P.R., Vestrand, W.T., Akerlof, C.W., et al., 2004, Astron. J., 127, 2436



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