CC BY
11"Peremennye Zvezdy", Prilozhenie, vol. 22, N 2 (2022)
New variable stars in Lacerta: area of 2°.3*20.3, center a=22h50m 5=54°00r. Part III
E. G. Lapukhin#1, A. M. Zuhareva#2'3. E. Kryukova#1. F. Khamrakulov#4
#1. Siberian State Aerospace University, Krasnoyarsk, Russia;
#2. Institute of Astronomy, Russian Academy of Sciences, Mo scow, Russia;
#3. Sternberg Astronomical Institute, Lomonosov Moscow State University, Moscow, Russia;
#4. Samarkand State University, Samarkand, Republic of Uzbekistan.
ISSN 2221-0474 DOI: 10.24412/2221-0474-2022-2
Received: 3.12.2016; accepted: 1.11.2022
(E-mail for contact: slovoktk@mail.ru)
# Name Other Coord (J2000) Ty-P-e Max Min System Period Epoch (JD) iyP-£ Sp- Comment L.Curve Find.Chart Data
1 2MASS 22532408+5423289 22 53 24.088 +54 23 28.97 EA 15.03 15.3 0.509428: 2456934.137 min Comm. 1 lc54533.png ch54533.png out54533.dat
2 2MASS 22532409+5324222 22 53 24.090 +53 24 22.21 EW 12.33 12.4 0.60083 2456927.281 min Comm. 2 lc13629.png ch13629.png out13629.dat
3 2MASS 22532818+5334536 22 53 28.181 +53 34 53.64 LB 12.67 12.87 other Comm. 3 lc17980.png ch17980.png out17980.dat
4 2MASS 22533548+5346092 22 53 35.490 +53 46 09.27 EW 16.3 17.0 0.46748 2456917.177 min Comm. 4 lc22816.png ch22816.png out22816.dat
5 2MASS 22533678+5441190 22 53 36.788 +54 41 19.01 SR 12.44 12.71 96: other Comm. 5 lc46812.png ch46812.png out46812.dat
6 2MASS 22534821+5423484 22 53 48.220 +54 23 48.45 SR: 13.07 13.14 46.3 2456929.5 max Comm. 6 lc54935.png ch54935.png out54935.dat
7 2MASS 22541998+5430327 22 54 19.980 +54 30 32.77 EB 14.59 14.98 0.58539 2456928.184 min Comm. 7 lc52457.png ch52457.png out52457.dat
8 2MASS 22542352+5349027 22 54 23.526 +53 49 02.76 EA 15.6 16.01 1.89908: 2456892.323 min lc23790.png ch23790.png out23790.dat
9 2MASS 22542544+5336021 22 54 25.442 +53 36 02.14 EB 14.46 14.63 0.56104 2456892.299 min Comm. 9 lc18401.png ch18401.png out18401.dat
10 2MASS 22542579+5416414 22 54 25.791 +54 16 41.43 EA 14.68 14.98 0.85572 2456928.286 min Comm. 10 lc39926.png ch39926.png out39926.dat
11 2MASS 22542644+5421034 22 54 26.441 +54 21 03.50 EW 15.66 15.83 0.53399 2456928.371 min Comm. 11 lc44669.png ch44669.png out44669.dat
12 2MASS 22543337+5417584 22 54 33.379 +54 17 58.50 EW 14.37 14.61 0.37325 2456928.235 min Comm. 12 lc39105.png ch39105.png out39105.dat
13 2MASS 22544133+5329122 22 54 41.331 +53 29 12.24 EA 12.49 13.2 1.30335 2456928.239 min Comm. 13 lc15236.png ch15236.png out15236.dat
14 2MASS 22544408+5337353 22 54 44.086 +53 37 35.36 EA 16.2 16.8 1.3475: 2456928.301 min Comm. 14 lc19173.png ch19173.png out19173.dat
15 2MASS 22544638+5427196 22 54 46.381 +54 27 19.61 BY: 13.004 13.041 0.6278 2456928.267 min Comm. 15 lc53459.png ch53459.png out53459.dat
16 2MASS 22545028+5414168 22 54 50.288 +54 14 16.83 EA 15.19 15.75 1.6098 2456918.153 min Comm. 16 lc40845.png ch40845.png out40845.dat
17 2MASS 22545244+5304362 22 54 52.446 +53 04 36.25 SR: 12.89 13.04 59.60: 2456201.268 max Comm. 17 lc05372.png ch05372.png out05372.dat
18 2MASS 22545361+5340179 22 54 53.618 +53 40 17.99 BY: 12.87 12.89 0.4434 2456894.339 max Comm. 18 lc20068.png ch20068.png out20068.dat
19 2MASS 22545464+5428044 22 54 54.646 +54 28 04.41 CEP: 13.15 13.27 2.1934: 2456928.351 max lc53075.png ch53075.png out53075.dat
I—II-II-II-II-II-II-II-II-II-II-II—II-II-II-ir
20 2MASS 22551126+5400176 22 55 11.266 +54 00 17.62 | LB_|_12.8l|_13.01
|other I_||Comm. 20||lc28206.png||ch28206.png||out28206.dat|
21
2MASS 22551430+5312512 22 55 14.304 +53 12 51.21
EW
12.82
12.95
0.597248
2456929.138 min
Comm. 21 lc08520.png ch08520.png
out08520.dat
22
2MASS 22551533+5322539 22 55 15.331 +53 22 53.97 EA
15.37
16.43
1.17671
2456929.159 min Comm. 22 lc12868.png ch12868.png out12868.dat
23
2MASS 22551856+5413496 22 55 18.564 +54 13 49.67 DSCT 12.545 12.561
0.0844756 2456917.255 max
lc41125.png ch41125.png out41125.dat
24
2MASS 22552642+5403542 22 55 26.425 +54 03 54.27
EB
14.65
15.03
0.76863
2456917.123 min
Comm. 24 lc29859.png ch29859.png
out29859.dat
25
2MASS 22552898+5400596 22 55 28.982 +54 00 59.64 EW 13.86 13.95
0.278628
2456928.225 min
Comm. 25 lc28532.png ch28532.png out28532.dat
26
2MASS 22553041+5322029 22 55 30.416 +53 22 02.91
EW
15.31
15.68
0.39123
2456928.067 min
Comm. 26 lc12364.png ch12364.png
out12364.dat
27
2MASS 22553084+5437189 22 55 30.843 +54 37 18.97
LB
12.62
13.44
other Comm. 27 lc49447.png ch49447.png out49447.dat
28
2MASS 22553162+5344346 22 55 31.627 +53 44 34.63
BY
12.86
12.9
1.4243:
2456927.193 max
lc21553.png ch21553.png
out21553.dat
29
2MASS 22554011+5424335 22 55 40.119 +54 24 33.53
LB
13.58
13.95
other Comm. 29 lc47153.png ch47153.png out47153.dat
30
2MASS 22554204+5410475 22 55 42.042 +54 10 47.58
EA
16.16 16.9
2.4678
2456927.282
min
Comm. 30 lc42331.png ch42331.png out42331.dat
31
2MASS 22555437+5459127 22 55 54.375 +54 59 12.75
EA
13.62
14.01
2.57461
2456894.304
min
Comm. 31 lc36753.png ch36753.png
out36753.dat
32
2MASS 22555603+5341393 22 55 56.034 +53 41 39.36
EA
14.82 15.32
0.79954
2456927.219
min
Comm. 32 lc20581.png ch20581.png out20581.dat
33
2MASS 22555732+5406531 22 55 57.321 +54 06 53.18
EA
15.48
15.7
1.7663
2456927.241
min
Comm. 33 lc31040.png ch31040.png
out31040.dat
34
2MASS 22555929+5435258 22 55 59.298 +54 35 25.81 EA
14.24
14.5
2.6315
2456918.073
min
Comm. 34 lc50543.png ch50543.png out50543.dat
35
2MASS 22560506+5308282 22 56 05.070 +53 08 28.22
EA
12.12 12.22
6.55:
2456928.139
min
lc06684.png ch06684.png out06684.dat
36
2MASS 22560613+5313389 22 56 06.131 +53 13 38.91
EW
16.24
16.9:
0.6653
2456906.765
min
Comm. 36 lc08977.png ch08977.png out08977.dat
37
2MASS 22563076+5256094 22 56 30.760 +52 56 09.44
EA
15.31 15.81
1.5789:
2456892.196
min
Comm. 37 lc01931.png ch01931.png out01931.dat
38
2MASS 22563547+5334378 22 56 35.475 +53 34 37.86
EW
15.7
15.95
0.67926
2456918.512
min
Comm. 38 lc17564.png ch17564.png
out17564.dat
39 GZ Lac 2MASS 22563921+5348264 22 56 39.219 +53 48 26.47
EA
15.22 16.59
1.8392
2456917.307
min
Comm. 39 lc23049.png ch23049.png out23049.dat
40
2MASS 22564126+5423467 22 56 41.266 +54 23 46.71
EA
14.75
15.19
1.31587
2456927.199
min
Comm. 40 lc55278.png ch55278.png
out55278.dat
41 HI Lac
2MASS 22564866+5347476 22 56 48.665 +53 47 47.67 EA
14.73
<16.7
1.04243
2456892.323
min
Comm. 41 lc22929.png ch22929.png out22929.dat
42
2MASS 22565543+5426470 22 56 55.436 +54 26 47.04 HADS 15.59 15.76
0.048344
2456927.217
max
lc53116.png ch53116.png out53116.dat
2MASS 22565839+5356393 22 56 58.398 +53 56 39.38
BY
14.47
14.55
4.2734:
2456227.316
min
lc26640.png ch26640.png out26640.dat
2MASS 22570008+5349082 22 57 00.084 +53 49 08.29 DSCT 13.92 13.98
0.12813
2456928.159
max
lc23412.png ch23412.png out23412.dat
2MASS 22570086+5449295 22 57 00.866 +54 49 29.51
DSCT
12.68
12.71
0.1587278
2456934.197
max
lc38572.png ch38572.png
out38572.dat
2MASS 22571126+5353287 22 57 11.264 +53 53 28.76 BY: 13.31 13.46
0.51897
2456928.284
max
Comm. 46 lc25151.png ch25151.png out25151.dat
2MASS 22571252+5421509 22 57 12.530 +54 21 50.97
EW
15.32
15.55
0.40252
2456892.402
min
Comm. 47 lc45181.png ch45181.png
out45181.dat
2MASS 22571868+5413015 22 57 18.684 +54 13 01.55
EW
14.54
15.23
0.33864
2456928.163
min
Comm. 48 lc41328.png ch41328.png out41328.dat
2MASS 22574040+5329269 22 57 40.410 +53 29 27.00 HADS 15.28 15.39
0.150905
2456892.176
max
lc15128.png ch15128.png out15128.dat
Comments:
1. Minjj = 15m.05. D = 0.1 P.
2. MinTT = 12m.37.
3. J = 8m425. H = 7m.401. K = 7m055 (2MASS). NSVS catalog entry: Object ID 3472469.
4. Minn = 16m.7.
5. J = 8m328. H = 7m.257. K = 6m849 (2MASS). NSVS catalog entry: Object ID 3471820.
6. J = 9m743. H = 8m733. K = 8m433 (2MASS).
7. Minn = 14m82. O'Connell etYect.
9. Minn = 14m55.
10. Minn = 14m8. D = 0.16P.
11. Minn = 15m.75.
12. Minn = 14m.61.
13. Minn = 13m.14. D = 0.12 P.
14. Minn = 16m8.
15. J = 1 lm655. H = 1 lm.341. K = llm.258 (2MASS).
16. Minn = 15m.55:.D = 0.18P.
17. J = 10m 889, H = 10m.256, K = 10m.108 (2MASS).
18. J = 1 lm.772. H = 1 lm.502. K = llm438 (2MASS).
20. J = 8m587. H = 8m.588. K = 7m.125 (2MASS). NSVS catalog entry: Object ID 3473769.
21. Minn = 12m92. O'Connell effect.
22. Minn = 15m.46. D = 0.16 P.
24. Minn = 14m.80.
25. Minn = 13m.94.
26. Minn = 15m63.
27. J = 9m232. H = 8m.059, K = 7m.667 (2MASS).
29. J = 9m.671, H = 5m549, K = 8m.167 (2MASS).
30. Twice shorter period (1.2339 d) is possible.
31. D = 0.16: P. Twice longer period is possible.
32. Minjj = 15m2. D = 0.16 P.
33. Minjj = 15m68. D = 0.10: P.
34. D = 0.16: P. Twice longer period is possible.
36. Minjj = 16m8:.
37. Twice longer period is possible.
38. Minjj = 15m93.
39. Minn = 15m.44.
40. Minjj = 15m.04. D = 0.17 P.
41. Minjj = 14m.88. D = 0.18 P.
46. The star became brighter by 0m.06 between 2012 and 2014. The magnitude ranges within the observational seasons are: 13m.31-13m.36 in 2012, 13m.36-13m.46 in 2014.
47. Minjj = 15m53.
48. Minjj = 15m04. Remarks:
We present the third part of our discoveries of variable stars in Lacerta: area of 2°.3*2°.3, centered at a=22h50m S=54°00'. Some of the objects are newly discoveries, some are already known from large scale surveys like ZTF and ASAS-SN.
Our observations of an area in Lacerta were performed at the observatory of the 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 (3056^3056 pixels, pixel size 12 ^m). Exposures of all frames were 30 seconds. A CCD image covers 2°.3*2°.3 of the sky. All unfiltered CCD observations were obtained during two time intervals: August-October 2012 and September-October 2014.
The magnitudes were referred to those of comparison stars (in unfiltered red band) from the UCAC4 catalog (Zacharias et al. 2013) using VaST software(Sokolovsky and Lebedev 2018). We also
used VaST to search for new variable stars. To define periods, we applied WinEfk software provided by Dr. 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:
Sokolovsky, K. V., Lebedev, A. A., 2018, Astron. and Computing, 22, 28
Zacharias, N., Finch, C. T., et al., 2013, The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
