Journal "Peremennye Zvezdy"

"Peremennye Zvezdy",
Prilozhenie,
vol. 10, N 6 (2010)

New Periodic Variables

A. V. Khruslov
Russia, Tula

ISSN 2221–0474

Received: 4.02.2010; accepted: 16.02.2010
(E-mail for contact: khruslov@bk.ru)

#	Other	Coord (J2000)	Type	Max	Min	System	Period	Epoch (JD)	type	Sp	Comment	L.Curve	Find.Chart	Data
1	TYC 2282 01372 1	01 05 44.71, +33 23 28.2	BY	10.58	10.83	R	49.3	2451508.	max		Comm. 1	1.PNG	chart1.PNG	NSVS 6430263 NSVS 6378261
2	GSC 2291-01603	01 18 16.74, +30 18 34.9	BY:	14.1	14.45	R	7.08	2451492.7	max		Comm. 2	2.PNG	chart2.PNG	NSVS 6440348
3	GSC 2306-00054	01 41 53.78, +37 09 13.5	BY	13.6	13.9	R	12.18	2451485.0	max		Comm. 3	3.PNG	chart3.PNG	NSVS 3841892 NSVS 6457833 NSVS 6470219
4	GSC 2314-00472	02 19 53.90, +33 17 00.8	BY	12.35	12.5	R	0.96737	2451494.665	max		Comm. 4	4.PNG	chart4.PNG	NSVS 6549910
5	TYC 2831 00348 1	02 22 20.47, +37 59 05.2	GDOR:	11.60	11.72	R	0.9252	2451514.52	max		Comm. 5	5.PNG	chart5.PNG	NSVS 3986901
6	GSC 4511-01581	05 13 03.29, +75 46 44.1	BY	12.65	12.85	R	13.9	2451512.5	max		Comm. 6	6.PNG	chart6.PNG	NSVS 579590 NSVS 612157
7	TYC 4343 00074 1	05 23 28.82, +69 04 58.1	BY:	10.85	11.0	R	6.108	2451441.5	max		Comm. 7	7.PNG	chart7.PNG	NSVS 550325
8	TYC 4093 00127 1	05 27 43.20, +65 59 15.5	BY	11.2	11.35	R	7.46	2451509.8	max		Comm. 8	8.PNG	chart8.PNG	NSVS 2192370 NSVS 2225596
9	GSC 2929-02300	06 00 51.08, +39 43 13.6	CEP	13.1	13.55	R	19.13	2451516.6	max		Comm. 9	9.PNG	chart9.PNG	NSVS 4536756
10	GSC 4367-00240	06 57 31.29, +72 49 48.0	E:	13.8	14.2	R	0.252765	2451526.627	min		Comm. 10	10.PNG	chart10.PNG	NSVS 671187
11	TYC 4543 02510 1	08 02 57.27, +78 34 47.9	EB	11.32	11.50	R	8.98	2451471.0	min		Comm. 11	11.PNG	chart11.PNG	NSVS 714150 NSVS 746762
12	GSC 3002-01317	10 35 36.24, +37 46 37.9	BY:	12.4	12.6	R	3.57	2451408.85	max		Comm. 12	12.PNG	chart12.PNG	NSVS 4915594 NSVS 7530596
13	GSC 3471-00990	14 09 25.52, +51 26 53.9	BY	13.65	14.0	R	14.93	2451424.0	max		Comm. 13	13.PNG	chart13.PNG	NSVS 5113318
14	TYC 3473 00100 1, BD+46 1968	14 32 13.05, +45 36 29.5	BY	10.1	10.35	R	27.1	2451366.0	max	K2	Comm. 14	14.PNG	chart14.PNG	NSVS 5104587 NSVS 5122399 NSVS 5128742 NSVS 5145202
15	GSC 4189-01084	16 10 47.39, +61 12 20.5	BY	12.3	12.6	R	18.5	2451391.5	max		Comm. 15	15.PNG	chart15.PNG	NSVS 2821000 NSVS 2845456
16	GSC 3878-00942	16 26 58.96, +53 24 34.0	BY	12.45	12.8	R	13.85	2451411.7	max		Comm. 16	16.PNG	chart16.PNG	NSVS 2828558 NSVS 5268624
17	TYC 0976 01617 1	17 01 57.54, +07 33 32.5	E/RS	11.7	11.95	R	1.81105	2452146.48	min		Comm. 17	17.PNG	chart17.PNG	NSVS 13660717 NSVS 10764726 ASAS 170157+0733.5
18	TYC 3215 01492 1	22 52 47.18, +37 37 35.5	BY	11.5	11.75	R	25.1	2451453.	max		Comm. 18	18.PNG	chart18.PNG	NSVS 6131523 NSVS 8926060 NSVS 8996442

Comments:

1. X-ray source 1RXS J010544.6+332335. B-V = 1.185 (Tycho2), J-H = 0.595 (2MASS). The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

2. J-H = 0.552 (2MASS).

3. J-H = 0.612 (2MASS). The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

4. J-H = 0.648 (2MASS). P = 30.6 d is not excluded. The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

5. B-V = -0.076 (Tycho2), J-H = 0.139 (2MASS).

6. J-H = 0.633 (2MASS).

7. B-V = 0.576 (Tycho2), J-H = 0.554 (2MASS). The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

8. B-V = 1.081 (Tycho2), J-H = 0.532 (2MASS). The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

9. J-H = 0.745 (2MASS). M-m = 0.40 P.

10. MinII = 14.0:. J-H = 0.593 (2MASS). The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

11. MinII = 11.43. J-H = 0.534 (2MASS), B-V = 0.957 (Tycho2). The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

12. J-H = 0.529 (2MASS). Amplitude varies. P = 1.39 d is not excluded.

13. J-H = 0.497 (2MASS). P = 0.93733 d is possible.

14. X-ray source 1RXS J143213.2+453621. J-H = 0.528 (2MASS), B-V = 1.224 (Tycho2). The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

15. X-ray source 1RXS J161046.9+611218. J-H =0.587. The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

16. X-ray source 1RXS J162658.6+532407. J-H = 0.515 (2MASS). The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

17. X-ray source 1RXS J170157.5+073329. B-V = 0.527 (Tycho2), J-H = 0.360 (2MASS). 11.65 - 11.9 (V, ASAS-3). Not listed in the ASAS catalog of variable stars (Pojmanski 2002). The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

18. X-ray source 1WGA J2252.7+3737. The color index B-V = 2.329 (Tycho2) is probably wrong. J-H = 0.562 (2MASS). The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis.

Remarks:
I present the discovery of 18 new periodic variables. The BY Dra classification of many stars in the list is based on their small variability amplitudes, rather large color indices, characteristic periodicity, and X-ray identifictations for some of them.

My search for variables was carried out in the publicly available data of the Northern Sky Variability Survey (NSVS, Wozniak et al. 2004; also see http://skydot.lanl.gov/nsvs). 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.

References:
Pojmanski, G., 2002, Acta Astronomica, 52, 397
Wozniak, P.R., Vestrand, W.T., Akerlof, C.W., et al., 2004, Astron. J., 127, 2436

New Periodic Variables

A. V. Khruslov Russia, Tula

A. V. Khruslov
Russia, Tula