Peremennye Zvezdy

"Peremennye Zvezdy",
Prilozhenie
,
vol. 14, N 7 (2014)

New Variable Stars in Lacerta: Area of 2°.3×2°.3, Centered at α=22h50m, δ=50°00′ (2000.0). Part I

E. G. Lapukhin#1, S. A. Veselkov#1, A. M. Zubareva#2,3, E. D. Starovoit#1, I. V. Kolbasina#1
#1. Siberian State Aerospace University, Krasnoyarsk, Russia;
#2. Institute of Astronomy, Russian Academy of Sciences, Moscow, Russia;
#3. Sternberg Astronomical Institute, Lomonosov Moscow State University, Moscow, Russia

Received:   5.06.2013;   accepted:   24.04.2014
(E-mail for contact: slovoktk@mail.ru)


#NameOtherCoord (J2000)TypeMaxMinSystemPeriodEpoch (JD)typeSpCommentL.CurveFind.ChartData
1 USNO-A2.0 1350-1718870522 42 42.16, +50 11 11.2EW14.27< 15 0.319812455833.401Min  lc24723.pngch_24723.pngout24723.txt
2 USNO-A2.0 1350-1719688122 42 57.90, +50 04 59.0EW13.4714.01 0.386012455831.237Min  lc16487.pngch_16487.pngout16487.txt
3 USNO-A2.0 1350-1719744722 42 59.02, +50 04 24.7ELL:12.8712.94 0.79842455802.468Min  lc16322.pngch_16322.pngout16322.txt
4 USNO-A2.0 1350-1719949422 43 03.04, +50 26 33.4EA12.5412.63: 1.089162455790.025Min  lc31446.pngch_31446.pngout31446.txt
5 USNO-A2.0 1350-1720344822 43 10.61, +50 32 56.4EW15.9616.35 0.45142455825.251Min  lc29979.pngch_29979.pngout29979.txt
6 USNO-A2.0 1350-1720499022 43 13.60, +50 30 51.5EA14.8115.19 3.5262455796.39Min  lc30446.pngch_30446.pngout30446.txt
7 2MASS J22431499+502824422 43 14.999, +50 28 24.43BY:13.4113.47 1.57332455789.883Max Comm. 7lc30950.pngch_30950.pngout30950.txt
8 USNO-A2.0 1350-1721198122 43 27.04, +50 19 36.4LB:12.1812.39   other Comm. 8lc22923.pngch_22923.pngout22923.txt
9 USNO-A2.0 1350-1721378622 43 30.48, +49 59 59.1EW15.3515.48 0.350272455823.193Min Comm. 9lc15312.pngch_15312.pngout15312.txt
10 USNO-A2.0 1350-1721455522 43 31.98, +49 38 29.5EW13.7013.93 0.4108072455819.243Min  lc10366.pngch_10366.pngout10366.txt
11 USNO-A2.0 1350-1721499722 43 32.80, +49 26 01.1EW16.8917.60 0.363292455824.067Min  lc1111.pngch_1111.pngout01111.txt
12 USNO-A2.0 1350-1721545022 43 33.66, +49 03 49.2EW15.5515.76 0.38362455821.401Min Comm. 12lc02819.pngch_02819.pngout02819.txt
13 USNO-A2.0 1350-1721592822 43 34.62, +50 02 40.8EW16.4016.78 0.272452455823.242Min  lc15969.pngch_15969.pngout15969.txt
14 USNO-A2.0 1350-1721621922 43 35.15, +50 21 01.0EW16.2617.00: 0.355232455825.084Min  lc22745.pngch_22745.pngout22745.txt
15 USNO-A2.0 1350-1722477322 43 51.72, +50 15 16.5EW16.6617.30 0.384272455824.090Min  lc2113.pngch_2113.pngout02113.txt
16 USNO-A2.0 1350-1722489422 43 51.95, +49 04 05.4LB:13.3013.40   other Comm. 16lc02652.pngch_02652.pngout02652.txt
17 USNO-A2.0 1350-1722956122 44 01.20, +49 03 02.8EW15.5016.12 0.425462455834.040Min Comm. 17lc02551.pngch_02551.pngout02551.txt
18 USNO-A2.0 1350-1723326622 44 08.36, +49 58 58.8BY:14.5514.67 0.816812455829.336Max  lc14939.pngch_14939.pngout14939.txt
19 USNO-A2.0 1350-1723721422 44 16.18, +49 21 35.0EW13.9214.15 0.353192455823.123Min  lc06496.pngch_06496.pngout06496.txt
20 USNO-A2.0 1350-1724054722 44 22.76, +50 39 18.2EA15.1715.51 5.9202455817.251Min Comm. 20lc21559.pngch_21559.pngout21559.txt
21 USNO-A2.0 1350-1724181122 44 25.21, +50 45 34.6EW16.2916.55 0.383702455823.238Min  lc3132.pngch_3132.pngout03132.txt
22 USNO-A2.0 1350-1724317422 44 27.97, +49 45 08.2EW15.0815.35 0.413992455823.177Min  lc11702.pngch_11702.pngout11702.txt
23 USNO-A2.0 1350-1724448822 44 30.55, +48 51 35.8EW14.5414.68 0.387712455820.147Min  lc49347.pngch_49347.pngout49347.txt
24 USNO-A2.0 1350-1724490622 44 31.34, +49 08 02.5EA15.7116.45 2.9172455820.26Min  lc03584.pngch_03584.pngout03584.txt
25 USNO-A2.0 1350-1724491822 44 31.38, +50 45 24.5DSCTC13.1213.14 0.0977982455790.308Max  lc27479.pngch_27479.pngout27479.txt
26 USNO-A2.0 1350-1724556622 44 32.66, +49 43 55.6EA14.9315.86 4.7542455823.763Min Comm. 26lc11440.pngch_11440.pngout11440.txt
27 USNO-A2.0 1350-1724589322 44 33.30, +50 06 59.9EW13.4013.53 0.294502455790.228Min  lc16748.pngch_16748.pngout16748.txt
28 USNO-A2.0 1350-1724737622 44 36.27, +49 33 07.2EB14.2114.54: 5.3082455829.76Min  lc08702.pngch_08702.pngout08702.txt
29 USNO-A2.0 1350-1724816622 44 37.92, +50 04 34.4BY:13.5813.61 0.469002455790.533Max  lc16134.pngch_16134.pngout16134.txt
30 USNO-A2.0 1350-1724827522 44 38.12, +49 57 11.8EW16.0716.39 0.33312455802.281Min  lc14593.pngch_14593.pngout14593.txt
31 USNO-A2.0 1350-1724840022 44 38.38, +50 34 27.0EA13.9214.58 2.6372455790.014Min  lc29770.pngch_29770.pngout29770.txt
32 USNO-A2.0 1350-1725066722 44 42.83, +49 03 09.8BY15.3515.49 6.152455825.1Max Comm. 32lc02484.pngch_02484.pngout02484.txt
33 USNO-A2.0 1350-1725230222 44 46.29, +48 57 18.5EA15.1415.85 1.1652455795.877Min Comm. 33lc1121.pngch_1121.pngout01121.txt
34 USNO-A2.0 1350-1725735822 44 56.36, +50 12 13.9EA12.9212.96 2.651:2455790.945Min  lc24752.pngch_24752.pngout24752.txt
35 USNO-A2.0 1350-1725893922 44 59.54, +49 49 45.2LB:11.79:11.94:   other Comm. 35lc50226.pngch_50226.pngout50226.txt
36 USNO-A2.0 1350-1725948822 45 00.61, +49 37 43.5BY:15.2015.33 1.3442455821.419Max  lc10061.pngch_10061.pngout10061.txt
37 USNO-A2.0 1350-1725981522 45 01.25, +49 56 57.5LB:12.8212.99   other Comm. 37lc14329.pngch_14329.pngout14329.txt
38 USNO-A2.0 1350-1726004822 45 01.71, +50 22 17.3EW17.0917.90 0.332412455825.206Min  lc3113.pngch_3113.pngout03113.txt
39 USNO-A2.0 1350-1726241422 45 06.40, +48 55 59.3EW14.6614.88 0.48162455819.206Min  lc00838.pngch_00838.pngout00838.txt
40 USNO-A2.0 1350-1726259722 45 06.75, +50 53 14.8LB:13.0913.36   other Comm. 40lc42398.pngch_42398.pngout42398.txt
41 USNO-A2.0 1350-1726306422 45 07.59, +49 37 58.9DSCTC13.2813.30 0.0475262455790.286Max  lc10018.pngch_10018.pngout10018.txt
42 USNO-A2.0 1350-1726479422 45 11.03, +49 06 43.8EW16.2616.63 0.330912455819.250Min  lc44098.pngch_44098.pngout44098.txt
43 2MASS J22451517+490457322 45 15.173, +49 04 57.33EW13.0313.10 0.401382455800.103Min Comm. 43lc02577.pngch_02577.pngout02577.txt
44 USNO-A2.0 1350-1727153022 45 24.04, +49 44 29.8EA14.1614.58 0.756612455800.443Min  lc43673.pngch_43673.pngout43673.txt
45 USNO-A2.0 1350-1727162222 45 24.23, +49 35 30.7EW13.7913.84 0.354012455790.408Min Comm. 45lc09431.pngch_09431.pngout09431.txt
46 USNO-A2.0 1350-1727289522 45 26.72, +50 37 51.8EW15.0415.32 0.299942455825.075Min  lc29135.pngch_29135.pngout29135.txt
47 USNO-A2.0 1350-1727444122 45 29.64, +50 45 27.6EA17.0317.91 0.248622455819.371Min  lc3121.pngch_3121.pngout03121.txt
48 USNO-A2.0 1350-1727482922 45 30.43, +49 18 20.0EW16.1616.44 0.363482455821.482Min  lc05677.pngch_05677.pngout05677.txt
49 USNO-A2.0 1350-1727532222 45 31.38, +49 07 57.8DSCT:16.5216.77 0.179342455823.215Max  lc45322.pngch_45322.pngout45322.txt
50 USNO-A2.0 1350-1727614222 45 33.00, +49 35 27.3EW13.4013.79 0.640072455831.999Min Comm. 50lc09326.pngch_09326.pngout09326.txt
51 2MASS J22453398+490659022 45 33.983, +49 06 59.07EW14.0214.09 0.348452455822.504Min Comm. 51lc03167.pngch_03167.pngout03167.txt
52 USNO-A2.0 1350-1728177122 45 44.28, +49 04 14.0LB:13.6113.76   other Comm. 52lc1131.pngch_1131.pngout01131.txt
53 2MASS J22454859+491632222 45 48.596, +49 16 32.29EW13.7113.79 0.62592455833.419Min Comm. 53lc05196.pngch_05196.pngout05196.txt
54 USNO-A2.0 1350-1728783922 45 56.45, +50 53 16.3BY:12.3312.45 152455824.2Max  lc25850.pngch_25850.pngout25850.txt
55 USNO-A2.0 1350-1728906222 45 58.86, +49 52 44.3EW15.3215.50 0.359252455823.367Min  lc13336.pngch_13336.pngout13336.txt
56 USNO-A2.0 1350-1729491122 46 10.83, +50 43 45.4EW16.4716.67 0.371582455823.267Min  lc3114.pngch_3114.pngout03114.txt
57 USNO-A2.0 1350-1729658422 46 14.36, +50 48 28.9EW15.9516.63 0.297232455820.246Min  lc3123.pngch_3123.pngout03123.txt
58 USNO-A2.0 1350-1730391822 46 29.36, +48 59 55.3LB:12.4312.65   other Comm. 58lc1141.pngch_1141.pngout01141.txt
59 USNO-A2.0 1350-1730587222 46 33.39, +49 10 00.3EA/RS13.5613.63 5.17:2455822.928Min  lc03718.pngch_03718.pngout03718.txt
60 USNO-A2.0 1350-1730738422 46 36.42, +49 53 55.9EW16.9317.41 0.26682455822.489Min  lc2116.pngch_2116.pngout02116.txt
61 USNO-A2.0 1350-1730960022 46 41.09, +50 12 49.6BY:13.4213.47 18.52455824.0Max  lc17760.pngch_17760.pngout17760.txt
62 USNO-A2.0 1350-1730988922 46 41.65, +50 46 48.8EA13.8314.06 1.371:2455820.263Min Comm. 62lc27325.pngch_27325.pngout27325.txt

Comments:


7. Combined brightness of two close stars, 2MASS J22431530+5028249 (J = 13.413, H = 13.470, K = 13.470) and 2MASS J22431499+5028244 (J = 13.907, H = 13.582, K = 13.487), was measured. The second one probably varies.

8. J = 8.182, H = 7.206, K = 6.851 (2MASS).

9. Combined brightness of two close stars, 2MASS J22433052+5000002 (J = 14.922, H = 14.580, K = 14.514) and 2MASS J22433029+4959576 (J = 14.906, H = 14.551, K = 14.323), was measured.

12. P = 0d.19176 is also possible with DSCT type.

16. J = 10.550, H = 9.639, K = 9.390 (2MASS).

17. MinII = 15m.88.

20. Twice shorter period is also possible.

26. O'Connell effect.

32. J = 13.408, H = 12.793, K = 12.616 (2MASS).

33. O'Connell effect.

35. J = 9.655, H = 9.081, K = 8.900 (2MASS).

37. J = 9.613, H = 8.622, K = 8.358 (2MASS).

40. J = 9.189, H = 8.198, K = 7.897 (2MASS).

43. Combined brightness of two close stars, 2MASS J22451536+4904507 (J = 11.902, H = 11.554, K = 11.459) and 2MASS J22451517+4904573 (J = 13.525, H = 13.325, K = 13.276), was measured. The first one probably varies.

45. Combined brightness of two close stars, 2MASS J22452406+4935318 (J = 13.393, H = 13.038, K = 13.028) and 2MASS J22451517+4904573 (J = 13.525, H = 13.325, K = 13.276), was measured.

50. MinII = 13m.74.

51. MinII = 14m.07.
Combined brightness of two close stars, 2MASS J22453398+4906590 (J = 14.300, H = 13.834, K = 13.785) and 2MASS J22453405+4907033 (J = 13.100, H = 12.910, K = 12.819), was measured. The first one probably varies.

52. J = 10.539, H = 9.570, K = 9.166 (2MASS).

53. MinII = 13m.77.
Combined brightness of two close stars, 2MASS J22454829+4916265 (J = 12.929, H = 12.761, K = 12.716) and 2MASS J22454858+4916322 (J = 14.979, H = 14.552, K = 14.433), was measured. The second one probably varies.

58. J = 9.417, H = 8.478, K = 8.213 (2MASS).

62. Only one minimum was observed.

Remarks:
On August 16 – October 30, 2011, we obtained about 1600 images with 30-second exposures of a field in Lacerta for discovery and investigation of new variables stars.
The field center has the coordinates α = 22h50m, δ = +50°00′, and the size of our frames is 2°.3 × 2°.3. In this paper, we present the first part of our results.
Our observations were performed in the city of Krasnoyarsk with a Hamilton telescope (D = 400 mm, F = 915 mm) equipped with an unfiltered FLI ML-9000 CCD camera (3056 × 3056 pixels, pixel size 12 μm).
For basic reductions for dark current, flat fields, bias, and for removing cosmic-ray hits, we used MaxImDL software.
The magnitudes were referred to red magnitudes of comparison stars from the USNO-A2.0 catalog (Monet et al. 1998).
For search and photometry of the majority of the new variable stars, we applied VaST software (developed by K. Sokolovsky and A. Lebedev, described by Kolesnikova et al. 2008). Several variable stars were found with the C-Munipack package.
To search for periods, we applied WinEfk software provided by Dr. V.P. Goranskij.

Acknowledgements: The authors wish to thank Dr. V.P. Goranskij for providing his efficient period-search software, Dr. K. Sokolovsky and A. Lebedev for their fine VaST software.

References:
Monet, D., Bird, A., Canzian, B., et al., 1998, USNO-A2.0, A Catalog of Astrometric Standards (U.S. Naval Observatory, Washington, DC), Centre de Données Astronomiques de Strasbourg, I/252
Kolesnikova, D.M., Sat, L.A., Sokolovsky, K.V., et al., 2008, Acta Astron., 58, 279



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