CC BY
60"Peremennye Zvezdy", Prilozhenle,
vol. 20, N 2 (2020)
Variable stars in Lacerta: area of 2°.3x2°.3, center a=22h50m S=54°00' (2000.0). Part I
E. G. Lapukhin#1. A. M. Zubareva#2'3. E. Kryukova#1. F. Khamrakulov#4
#1. Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russia; #2. Institute of Astronomy, Russian Academy of Sciences, Moscow, Russia; #3. Sternberg Astronomical Institute, Lomonosov Moscow State University, Moscow, Russia; #4. Samarkand State University, Samarkand, Republic of Uzbekistan.
ISSN 2221-0474 DOI: 10.24411/2221-0474-2020-10013
Received: 3.12.2016; accepted: 15.12.2020
(E-mail for contact: slovoktk@mail.ru)
# Name Other Coord (J2000) Type Max Min System Period Epoch (JD) iyp-e Sp Comment L.Curve Find.Chart Data
1 2MASS 22422744+5446311 22 42 27.440 +54 46 31.11 EA 15.81 16.3 0.74069 2456928.152 min Comm. 1 lc43456.png ch43456.png out43456.dat
2 2MASS 22423576+5411320 22 42 35.760 +54 11 32.06 RRC 13.52 13.61 0.59525 2456892.302 max lc39193.png ch39193.png out39193.dat
3 2MASS 22424022+5453367 22 42 40.223 +54 53 36.80 EA 13.51 13.66 1.4781 2456928.176 min lc36178.png ch36178.png out36178.dat
4 2MASS 22425392+5439498 22 42 53.929 +54 39 49.81 EA 13.17 13.54 2.24636 2456928.081 min Comm. 4 lc46369.png ch46369.png out46369.dat
5 2MASS 22431277+5439408 22 43 12.776 +54 39 40.86 DSCT 13.49 13.56 0.1286145 2456173.175 max lc46446.png ch46446.png out46446.dat
6 2MASS 22431512+5449579 22 43 15.125 +54 49 57.91 SR: 12.77 12.97 41.5: 2456171.1 max Comm. 6 lc37854.png ch37854.png out37854.dat
7 2MASS 22432652+5411584 22 43 26.527 +54 11 58.48 EW: 12.04 12.13 1.1568: 2456894.271 min Comm. 7 lc39418.png ch39418.png out39418.dat
8 2MASS 22433683+5429587 22 43 36.831 +54 29 58.77 EA 12.3 12.83 4.0553 2456928.273 min Comm. 8 lc50148.png ch50148.png out50148.dat
9 2MASS 22433818+5446306 22 43 38.190 +54 46 30.65 EA 16.32 17.2 2.645: 2456929.153 min Comm. 9 lc43878.png ch43878.png out43878.dat
10 2MASS 22434441+5415008 22 43 44.414 +54 15 00.86 LB 12.63 13.08 other Comm. 10 lc56253.png ch56253.png out56253.dat
11 2MASS 22440248+5444221 22 44 02.483 +54 44 22.15 DSCT 12.561 12.578 0.07349 2456928.114 max lc44787.png ch44787.png out44787.dat
12 2MASS 22440896+5430515 22 44 08.962 +54 30 51.51 BY 14.92 15.14 19.26 2456926.09 max lc50407.png ch50407.png out50407.dat
13 2MASS 22442993+5431405 22 44 29.937 +54 31 40.57 BY 14.44 14.54 3.819 2456180.425 max lc50230.png ch50230.png out50230.dat
14 2MASS 22443363+5335465 22 44 33.638 +53 35 46.58 SR: 12.93 13.06 29.8 2456896.3 max Comm. 14 lc20473.png ch20473.png out20473.dat
15 2MASS 22444121+5403539 22 44 41.218 +54 03 53.98 LB 14.19 14.7 other Comm. 15 lc32126.png ch32126.png out32126.dat
16 2MASS 22445704+5500055 22 44 57.050 +55 00 05.58 LB 13.56 13.67 other Comm. 16 lc34215.png ch34215.png out34215.dat
17 2MASS 22445835+5444382 22 44 58.351 +54 44 38.25 EA 15.21 15.66 2.56142: 2456892.307 min lc45128.png ch45128.png out45128.dat
18 2MASS 22450216+5409407 22 45 02.165 +54 09 40.79 DSCT 12.847 12.866 0.09233 2456928.279 max lc40593.png ch40593.png out40593.dat
19 2MASS 22450238+5330579 22 45 02.382 +53 30 57.98 BY 13.45 13.51 20.52: 2456918.7 max lc18341.png ch18341.png out18341.dat
20 2MASS 22450476+5414326 22 45 04.765 +54 14 32.63 LB 12.20 13.04 other Comm. 20 lc38636.png ch38636.png out38636.dat
21 2MASS 22450865+5252223 22 45 08.652 +52 52 22.38 DSCT 13.35 13.37 0.095221 2456928.166 max lc02616.png ch02616.png out02616.dat
II-II-II-II-II-II-II-II-II-II-II-II-II-II-II-1
22 2MASS 22451103+5455516 22 45 11.033 +54 55 51.60 EA 14.11 14.25 1.4045: 2456929.203 min |lc35983.png |ch35983.png |out35983.dat
23 2MASS 22452107+5404582 22 45 21.071 +54 04 58.29 EW 14.9 15.02 0.30916 2456928.322 min Comm. 23 lc31857.png ch31857.png out31857.dat
24 2MASS 22452154+5406107 22 45 21.547 +54 06 10.71 LB 11.98 12.12 other Comm. 24 lc32746.png ch32746.png out32746.dat
25 GW Lac 2MASS 22454172+5314334 22 45 41.728 +53 14 33.45 EA 15.13 16.3 2.3009 2456927.154 min Comm. 25 lc11406.png ch11406.png out11406.dat
26 2MASS 22455849+5403481 22 45 58.499 +54 03 48.10 EW 14.87 15.18 1.0737 2456927.338 min Comm. 26 lc31744.png ch31744.png out31744.dat
27 2MASS 22461076+5328380 22 46 10.764 +53 28 38.06 SR: 13.35 13.49 59.6 2456923.8 max Comm. 27 lc16876.png ch16876.png out16876.dat
28 2MASS 22461098+5412447 22 46 10.983 +54 12 44.72 EW 15.64 15.82 0.38657 2456928.127 min Comm. 28 lc39747.png ch39747.png out39747.dat
29 2MASS 22461174+5313329 22 46 11.743 +53 13 32.92 EW 16.29 16.75 0.41544 2456929.247 min Comm. 29 lc10944.png ch10944.png out10944.dat
30 2MASS 22461700+5333039 22 46 17.001 +53 33 03.95 EW 15.58 15.83 0.34926 2456928.124 min Comm. 30 lc19023.png ch19023.png out19023.dat
31 2MASS 22462507+5416558 22 46 25.074 +54 16 55.81 EW 13.36 13.42 0.68802 2456917.529 min Comm. 31 lc56211.png ch56211.png out56211.dat
32 2MASS 22464776+5453461 22 46 47.763 +54 53 46.15 LB 12.30 12.46 other Comm. 32 lc37262.png ch37262.png out37262.dat
33 2MASS 22465309+5358444 22 46 53.092 +53 58 44.50 BCep 12.39 12.43 0.54223 2456894.282 max lc29204.png ch29204.png out29204.dat
34 2MASS 22470097+5252338 22 47 00.977 +52 52 33.84 EA 15.23 15.65 2.3786: 2456934.252 min lc02280.png ch02280.png out02280.dat
35 2MASS 22471267+5501098 22 47 12.670 +55 01 09.87 EW 16.41 17.07 0.24001 2456928.238 min Comm. 35 lc34370.png ch34370.png out34370.dat
36 2MASS 22472426+5443010 22 47 24.262 +54 43 01.01 EA 14.78 15.45 4.0817 2456907.11 min lc46036.png ch46036.png out46036.dat
37 2MASS 22472546+5258001 22 47 25.460 +52 58 00.14 EA 13.90 13.99 4.7972: 2456928.272 min Comm. 37 lc04236.png ch04236.png out04236.dat
38 2MASS 22472590+5407249 22 47 25.908 +54 07 24.91 EW 12.9 12.99 0.400092 2456928.123 min Comm. 38 lc42235.png ch42235.png out42235.dat
39 2MASS 22474023+5404432 22 47 40.237 +54 04 43.24 BY 13.83 13.89 2.335: 2456927.754 max lc31682.png ch31682.png out31682.dat
40 2MASS 22474631+5436463 22 47 46.314 +54 36 46.33 EW 14.44 14.76 0.379751 2456928.489 min Comm. 40 lc48959.png ch48959.png out48959.dat
41 2MASS 22475801+5421005 22 47 58.016 +54 21 00.53 LB 13.14 13.30 other Comm. 41 lc55120.png ch55120.png out55120.dat
42 2MASS 22480951+5253008 22 48 09.511 +52 53 00.88 LB 13.14 13.62 other Comm. 42 lc02051.png ch02051.png out02051.dat
43 2MASS 22483237+5425461 22 48 32.376 +54 25 46.14 EW 15.17 15.51 0.402537 2456928.335 min Comm. 43 lc53255.png ch53255.png out53255.dat
44 2MASS 22483511+5359566 22 48 35.120 +53 59 56.62 LB 12.31 12.39 other Comm. 44 lc29280.png ch29280.png out29280.dat
45 2MASS 22483941+5402365 22 48 39.418 +54 02 36.60 EB 16.08 16.75 0.42910 2456928.323 min Comm. 45 lc30724.png ch30724.png out30724.dat
46 2MASS 22484109+5336474 22 48 41.097 +53 36 47.48 EW 14.01 14.35 0.336175 2456928.256 min Comm. 46 lc19873.png ch19873.png out19873.dat
47 2MASS 22484376+5314071 22 48 43.770 +53 14 07.20 EB 13.16 13.19 0.69342 2456894.162 min Comm. 47 lc10382.png ch10382.png out10382.dat
48 GSC 03984-00503 2MASS 22484477+5415057 22 48 44.778 +54 15 05.73 EB 13.08 13.5 0.496897 2456927.164 min Comm. 48 lc39303.png ch39303.png out39303.dat
49 2MASS 22484526+5340053 22 48 45.264 +53 40 05.32 EA 15.41 <15.8 0.95191 2456927.765 min Comm. 49 lc21273.png ch21273.png out21273.dat
Comments:
1. Minn = 15m.85. 4. Minn = 13m.23.
6. J=7m 843, H=7m.751, K=7m.327 (2MASS).
7. Minn = 12m .11.
8. Minn = 12m.75.
9. Minn = 16m.9:.
10. J=7m.843, H=6m.740, K=6m.294 (2MASS).
The object is in the NSVS database: NSVS ID 3463164.
14. J=11m.000, H=10m.375 K=10m.228 (2MASS).
15. J=10m.849, H=9m.860 K=9m.563 (2MASS).
16. J=10m.314, H=9m.238 K=8m.959 (2MASS). 20. J=9m.731, H=8m.734 K=8m.442 (2MASS).
23. MinII = 14m.98.
24. J=8m.770, H=7m.790 K=7m.479 (2MASS).
25. MinII = 15m.25.
26. MinII = 15m.08.
27. J=10m.515, H=9m.600 K=9m.321 (2MASS).
28. MinII = 15m.81.
29. Minn = 16m.75.
30. MinII = 15m.80.
31. MinII = 13m.41.
32. J=8m.851, H=7m.830 K=7m.499 (2MASS). 35. Minn = 17m.02.
37. MinII = 13m.96.
38. MinII = 12m.98.
40. MinII = 14m.74.
41. J=9m.763, H=8m.738 K=8m.434 (2MASS).
42. J=8m.887, H=7m.878 K=7m.494 (2MASS).
43. MinII = 15m.43.
44. J=9m.288, H=8m.341 K=8m.081 (2MASS).
45. Minn = 16m.30.
46. Minn = 14m.35.
47. Minn = 13m. 17.
48. Minn = 13m.33.
49. Minn = 15m.66. Remarks:
We present the first part of the list of variable stars in Lacerta: area of 2°.3x2°.3, centered at a= 22h50m S=54°00' (2000.0). Some of objects are newly discovered, some are already known from massive surveys like ZTF and ASAS-SN. GW Lac was discovered by C. Hoffmeister (1967), but had no period.
Our observations of the field in Lacerta were performed at the observatory of Reshetnev Siberian State University of Science and Technology with a Hamilton telescope (D = 400 mm, F = 915 mm), equipped with an FLI ML9000 CCD chip (3056 x 3056 pixels, pixel size 12 ^m). Exposures of all frames were 30 seconds. A CCD-image covers 2°.3 x 2°.3 of the sky. We obtained all unfiltered CCD-observations during two periods: August-October 2012 and September-October 2014.
The magnitudes were referred to unfiltered red band of comparison stars from the UCAC4 catalog (Zacharias et al. 2013). We used VaST software (Sokolovsky & Lebedev 2018) to search for variable stars. To search for periods, we applied WinEfk software provided by V.P. Goranskij.
This work was supported by Ministry of Education and Science of Russian Federation within limits of state contract 3.6822.2017/7.8.
Acknowledgements: The authors wish to thanks Dr. V.P. Goranskij for providing his efficient 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).
References:
Hoffmeister, C., 1967, Astron. Nachr., 289, H.5, 205
Sokolovsky, K. V., Lebedev, A. A., 2018, Astron. and Computing, 22, 28
Zacharias, N., Finch, C. T., Girard, T. M. et al., 2013, Astron. J., 145, 44, The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
