CC BY
8"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)
# Name | Other | Coord (J2000) Iyp_£ | Max Min System Period Epoch (JD) type Sp Comment L.Curve Find.Chart Data
1 USNO-B1.0 1076-0200842 08 58 42.80, +17 39 25.3 EA 17.35 17.81 CV 0.831806 2455201.1983 min Comm 1 1.PNG chart1.PNG MLS data 1.txt
2 GSC 2986-00338 09 04 21.04, +41 55 12.9 BY 14.17 14.65 CV 13.101 2455008.1 max Comm 2 2.PNG chart2.PNG NSVS 4829404 CSS data 2.txt 1SWASP data 2.txt
3 TYC 3427 00673 1 09 06 29.00, +49 34 22.2 EW 11.58 11.78 WASP 0.512713 2454500.715 min Comm 3 3.PNG chart3.PNG NSVS 4851790 CSS data 3.txt 1SWASP data 3.txt
4 GSC 2987-01524 09 07 29.26, +42 28 05.5 RS 11.9 12.15 R 24.7 2451298 min Comm 4 4.PNG chart4.PNG NSVS 4830838 1SWASP data 4.txt
5 TYC 2987 01505 1 09 08 47.09, +42 29 14.9 RS 10.67 10.81 WASP 4.948 2454504.0 max Comm 5 5.PNG chart5.PNG NSVS 4831470 1SWASP data 5.txt
6 GSC 3424-01547 09 10 39.89, +45 57 01.6 EW 12.73 12.83 WASP 0.2623925 2454500.580 min Comm 6 6.PNG chart6.PNG NSVS 4831740 NSVS 4854277 1SWASP data 6.txt
7 GSC 2987-00452 09 12 22.64, +40 25 30.7 BY 12.36 12.41 WASP 3.422 2454300.45 max Comm 7 7.PNG chart7.PNG NSVS 4833589 1SWASP data 7.txt
8 GSC 3430-00829 09 13 22.83, +51 35 04.3 EB 12.35 12.62 WASP 0.915801 2454520.658 min Comm 8 8.PNG chart8.PNG NSVS 4854386 NSVS 2513647 NSVS 4866118 1SWASP data 8.txt|
9 TYC 3431 00222 1 09 18 21.28, +51 07 46.3 LB 11.39 11.65 WASP other Comm 9 9.PNG chart9.PNG NSVS 4856655 NSVS 4867683 1SWASP data 9.txt
10 TYC 2997 00619 1 09 21 40.84, +43 47 47.8 EB 11.84 11.99 WASP 0.931480 2454510.570 min Comm. 10 10.PNG chart10.PNG| NSVS 4837326 NSVS 4885786 1SWASP data 10.txt
11 TYC 3429 01053 1 09 35 25.20, +49 38 29.4 EA/RS: 12.05 12.25 R 1.326503 2451452.76 min Comm. 11 11.PNG chart11.PNG| NSVS 4863877 NSVS 4873744 1SWASP data 11.txt
12 TYC 3426 01518 1 09 42 05.19, +47 22 03.5 RS 10.19 10.38 R 40.7 2451579 min Comm. 12 12.PNG chart12.PNG| NSVS 4875978
13 GSC 2999-01120 09 47 50.50, +44 02 38.5 EW 13.85 14.15 CV 0.664905 2455000.935 min Comm. 13 13.PNG chart13.PNG| NSVS 4896685 CSS data 13.txt
14 GSC 2999-01213 09 49 37.12, +42 33 59.7 BY 13.4 13.8 CV 19.208 2455005.0 max Comm. 14 14.PNG chart14.PNG| NSVS 4897261 CSS data 14.txt 1SWASP data 14.txt
15 TYC 2996 01179 1 09 49 57.51, +40 56 26.2 LB 11.15 11.35 R other Comm. 15 15.PNG chart15.PNG| NSVS 4897238 1SWASP data 15.txt
16 GSC 2999-00047 09 53 30.31, +44 17 01.0 BY 13.40 13.76 CV 6.3835 2455014.9 max Comm. 16 16.PNG chart16.PNG| NSVS 4898989 CSS data 16.txt
17 GSC 3439-00987 09 54 22.20, +50 56 49.8 EW 13.57 13.77 CV 0.257242 2455000.572 min Comm. 17 17.PNG chart17.PNG| NSVS 4881097 CSS data 17.txt
18 GSC 2999-00675 09 54 59.69, +43 36 27.1 EA/RS: 12.2 12.7 WASP 6.5983 2454120.555 min Comm. 18 18.PNG chart18.PNG| NSVS 4899538 1SWASP data 18.txt
19 GSC 2999-00604 09 55 39.35, +43 19 17.9 EA/RS 12.48 12.90 WASP 3.70766 2454150.55 min Comm. 19 19.PNG chart19.PNG| NSVS 4899798 1SWASP data 19.txt
20 GSC 2996-00414 09 56 00.66, +40 41 28.8 BY: 12.21 12.44 R 0.27179 2451500.863 max Comm. 20 20.PNG chart20.PNG| NSVS 4899795 1SWASP data 20.txt
21 TYC 3434 00104 1 10 02 03.67, +46 05 04.4 ELL 10.38 10.46 R 0.394089 2451600.510 min Comm. 21 21.PNG chart21.PNG| NSVS 4883615 NSVS 4902224 1SWASP data 21.txt
22 GSC 3434-00785 10 14 06.26, +46 27 01.4 EB 13.24 13.83 CV 0.411636 2455000.589 min Comm. 22 22.PNG chart22.PNG| NSVS 4906384 NSVS 4924202 CSS data 22.txt
23 GSC 3004-00868 10 19 09.72, +41 46 11.0 EW 12.72 12.87 WASP 0.449414 2454150.825 min Comm. 23 23.PNG chart23.PNG| NSVS 4908487 1SWASP data 23.txt
24 USN0-A2.0 1350-14178041 21 29 05.79, +50 20 07.0 EW 13.65 14.25 WASP 0.494673 2454330.512 min Comm. 24 24.PNG chart24.PNG| NSVS 5864781 NSVS 5966138 1SWASP data 24.txt
25 USN0-B1.0 1036-0606316 21 55 07.26, +13 41 12.3 EA 15.30 17.42 CV 1.926081 2455001.837 min Comm. 25 25.PNG chart25.PNG| CSS 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, 14m35 - 14m.6; from ROTSE-I/NSVS data, 14m2 - 14m6 in the R band. According to NSVS data, the light elements are: JD(max) = 2451504.2 + 13d.2xE. Combined brightness of three stars, GSC 2986-00338 and fainter ones, USN0-A2.0 1275-07437120 and USN0-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. Minll = 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. + 25d8xE. 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 1 SWASP 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.427xE. J-K = 0.401 (2MASS). The star has a faint close companion USN0-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, 10™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 1 SWASP 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 1 SWASP 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 + 19d2xE; double wave in NSVS. J-K = 0.718 (2MASS).
15. From 1 SWASP 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 + 3d697xE. The ROTSE data with photometric correction flags were kept for the analysis.
20. From 1 SWASP data, 12m.56 - 12m.64. According to 1 SWASP data, the light elements are: JD(max) = 2454150.570 + 0d27185xE. 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, Wozniak 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 theOMC2ASCII 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. VP. 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., 2 13, 9 Sokolovsky, K.V, 2007, Perem. Zvezdy Prilozh., 7, No. 30 Wozniak, P.R., Vestrand, W.T., Akerlof, C.W., et al., 2004, Astron. J., 127, 2436
