Peremennye Zvezdy

"Peremennye Zvezdy",
Prilozhenie
,
vol. 16, N 4 (2016)

25 new small amplitude variable stars in Lacerta

E. G. Lapukhin#1, S. A. Veselkov#1, A. M. Zubareva#2,3
#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:   1.07.2014;   accepted:   20.07.2016
(E-mail for contact: slovoktk@mail.ru)


#NameOtherCoord (J2000)TypeMaxMinSystemPeriodEpoch (JD)typeSpCommentL.CurveFind.ChartData
1 2MASS 22424522+530059622 42 45.223, +53 00 59.60EB13.54313.592 0.58332456171.249Min Comm. 1lc34693.pngch34693.pngout34693.dat
2 2MASS 22431898+511832322 43 18.984, +51 18 32.34DSCTC13.15513.201 0.0763462456171.183Max  lc13071.pngch13071.pngout13071.dat
3 2MASS 22432856+515034922 43 28.567, +51 50 34.93EW13.63813.680 0.321262456181.190Min Comm. 3lc26520.pngch26520.pngout26520.dat
4 2MASS 22451983+513148422 45 19.831, +51 31 48.49DSCTC13.76413.790 0.179552456180.148Max  lc18058.pngch18058.pngout18058.dat
5 2MASS 22454896+515232022 45 48.966, +51 52 32.09DSCTC12.36712.390 0.0506812456159.337Max  lc26702.pngch26702.pngout26702.dat
6 2MASS 22460679+522241622 46 06.790, +52 22 41.66DSCTC14.51614.573 0.129582456180.219Max  lc57039.pngch57039.pngout57039.dat
7 2MASS 22464503+521730322 46 45.039, +52 17 30.31RRC13.50613.546 0.579882456175.129Max  lc40992.pngch40992.pngout40992.dat
8 2MASS 22491542+513707222 49 15.424, +51 37 07.30DSCTC12.93512.992 0.137162456173.202Max  lc19167.pngch19167.pngout19167.dat
9 2MASS 22500550+514115522 50 05.504, +51 41 15.59DSCTC12.83312.870 0.123002456173.312Max  lc20870.pngch20870.pngout20870.dat
10 2MASS 22501537+510635922 50 15.375, +51 06 35.96DSCTC12.38912.402 0.0769382456159.223Max  lc06420.pngch06420.pngout06420.dat
11 2MASS 22503723+512738022 50 37.238, +51 27 38.10SR12.22812.284 26.62456162.2Max  lc15018.pngch15018.pngout15018.dat
12 2MASS 22512620+520318522 51 26.201, +52 03 18.52EA13.86813.940 1.555:2456174.187Min  lc30123.pngch30123.pngout30123.dat
13 2MASS 22513464+511313822 51 34.643, +51 13 13.80GDOR:12.00912.042 0.71212456196.949Max  lc08621.pngch08621.pngout08621.dat
14 2MASS 22514584+523409822 51 45.840, +52 34 09.88DSCTC13.00413.028 0.098832456175.237Max  lc53884.pngch53884.pngout53884.dat
15 2MASS 22530636+525719922 53 06.367, +52 57 19.96EA12.87412.921 2.3142456174.126Min  lc38647.pngch38647.pngout38647.dat
16 2MASS 22533097+513335722 53 30.972, +51 33 35.70DSCTC12.71912.739 0.0942942456181.343Max  lc17123.pngch17123.pngout17123.dat
17 2MASS 22534109+514735322 53 41.093, +51 47 35.36DSCTC12.85912.876 0.096992456180.188Max  lc23012.pngch23012.pngout23012.dat
18 2MASS 22535274+515708622 53 52.741, +51 57 08.64DSCTC12.66012.682 0.0664412456174.164Max  lc26981.pngch26981.pngout26981.dat
19 2MASS 22540445+511702522 54 04.458, +51 17 02.54DSCTC14.77514.847 0.129672456181.341Max  lc10180.pngch10180.pngout10180.dat
20 2MASS 22542439+513606722 54 24.395, +51 36 06.72EB13.65713.708 0.811562456181.372Min Comm. 20lc18093.pngch18093.pngout18093.dat
21 2MASS 22542877+520514222 54 28.770, +52 05 14.21DSCTC14.76814.828 0.086902456173.122Max  lc30529.pngch30529.pngout30529.dat
22 2MASS 22550221+514141122 55 02.215, +51 41 41.19DSCTC13.14213.177 0.084512456180.227Max  lc20313.pngch20313.pngout20313.dat
23 2MASS 22550712+512846322 55 07.121, +51 28 46.37BY:14.05114.107 3.1482456173.763Max  lc14892.pngch14892.pngout14892.dat
24 2MASS 22554417+523007722 55 44.170, +52 30 07.76DSCTC13.38013.417 0.114322456181.242Max  lc55522.pngch55522.pngout55522.dat
25 2MASS 22560807+523500422 56 08.073, +52 35 00.42DSCTC12.66612.689 0.121322456159.333Max  lc39871.pngch39871.pngout39871.dat

Comments:


1. MinII = 13m.575.

3. MinII = 13m.675.

20. MinII = 13m.674.

Remarks:
We restudied a field in Lacerta (Lapukhin et al. 2013) and found 25 small amplitude variable stars. Unfortunately we missed these objects while investigating the area for the first time. The observations were performed at the observatory of the Siberian State Aerospace University with a Hamilton telescope (D = 400 mm, F = 915 mm) equipped with an FLI ML9000 CCD chip (3056 × 3056 pixels, pixel size 12 μm). All CCD observations are unfiltered and were obtained from August to November 2012. Exposure times were 30 seconds for all frames. The size of the field is 2°.3 × 2°.3.
The magnitudes were referred to red magnitudes of comparison stars from the USNO-A2.0 catalog (Monet et al. 1998).

We used VaST (Sokolovsky & Lebedev 2005) software to search for new variable stars.

To find periods, we applied WinEfk software provided by Dr. V.P. Goranskij.

Acknowledgements: The authors wish to thank Dr. V.P. Goranskij for providing his period-search software and Dr. K.V. Sokolovsky for providing VaST (a software package for detection of variable objects on a series of astronomical images). This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the UMass/IPAC-Caltech, funded by the NASA and the NSF, and the Aladin interactive sky atlas, operated at CDS, Strasbourg, France.

References:
Lapukhin, E. G., Veselkov, S. A., Zubareva A. M., 2013, Perem. Zvezdy Prilozh., 13, No. 12
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
Sokolovsky, K., Lebedev, A., 2005, in 12th Young Scientists' Conference on Astronomy and Space Physics, Kyiv, Ukraine, April 19-23, 2005, eds.: Simon, A.; Golovin, A., p.79



Main Page | Search
Astronet | SAI | INASAN

Report problems