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17"Peremennye Zvezdy", Prilozhenie, vol. 21, N3(2021)
New Variable Stars in Lacerta: Area of 2°.3x2°.3, Center a=22h50m 8=54°00f (2000.0). Part II
E. G. Lapukhin#1. A. M. Zuhareva#2'3. E. Krvukova#1. F. Khamrakulov^4
#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;
#4. Samarkand State University, Samarkand, Republic of Uzbekistan.
ISSN 2221-0474 DOI: 10.24412/2221-0474-2021-3
Received: 3.12.2016; accepted: 31.08.2021
(E-mail for contact: slovoktk@mail.ru')
# Name Other Coord (J200(n Jto-e Max Min Svstem Period Epoch ("JD1 tym Sp_ Comment L.Curve Find.Chart Data
1 2MASS 22484859+5318405 22 48 48.599+53 18 40.59 EW 15.86 16.26 0.50644 2456928.181 min Comm. 1 1c12353.png ch!2353.png outl2353.dat
2 2MASS 22485138+5501209 22 48 51.381 +55 01 20.96 DSCT 13.39 13.43 0.0929717 2456929.171 max Comm. 2 lc34651.png ch34651.png out34651.dat
3 2MASS 22485457+5405219 22 48 54.570 +54 05 21.97 SR: 14.33 14.44 27.7: 2456926.3 max Comm. 3 lc31653.png ch31653.png out31653.dat
4 FRLac 2MASS 22485788+5412354 22 48 57.884 +54 12 35.46 EA 14.58 15.51 0.831921 2456927.263 min lc40513.png ch40513.png out40513.dat
5 2MASS 22485911+5421379 22 48 59.120 +54 21 37.99 EA 15.03 15.35 2.37077: 2456934.259 min lc55093.png ch55093.png out55093.dat
6 2MASS 22490253+5315062 22 49 02.536+53 15 06.21 EA 16.04 16.77 2.3795: 2456934.145 min lc10853.png ch!0853.png out! 0853.dat
7 2MASS 22490279+5345336 22 49 02.797 +53 45 33.61 EW 15 15.3 0.40529 2456928.087 min Comm. 7 1c23315.png ch23315.png out23315.dat
8 2MASS 22490710+5330556 22 49 07.103 +53 30 55.66 EB 16.1 16.49 2.2387: 2456893.309 min lcl7416.png chl7416.png outl7416.dat
9 2MASS 22490859+5325355 22 49 08.600 +53 25 35.54 EW 15.08 15.28 0.63468 2456892.253 min Comm. 9 lcl5069.png chl 5069.png outl5069.dat
10 2MASS 22490968+5356408 22 49 09.681 +53 56 40.86 EW 15.55 15.78 0.37778 2456929.136 min lc28001.png ch28001.png out28001.dat
11 2MASS 22491471+5328085 22 49 14.715 +53 28 08.57 LB 12.87 13.05 other Comm. 11 lcl5391.png chl 5391.png outl5391.dat
12 2MASS 22491672+5442496 22 49 16.730+54 42 49.68 LB 13.77 13.34 other Comm. 12 lc46726.png ch46726.png out46726.dat
13 2MASS 22492261+5308355 22 49 22.610+53 08 35.52 DSCT 15.69 15.83 0.15836 2456892.295 max Comm. 13 lc08104.png ch08104.png out08104.dat
14 2MASS 22492581+5445020 22 49 25.814+54 45 02.07 LB 14.42 14.54 other Comm. 14 lc45569.png ch45569.png out45569.dat
15 2MASS 22494092+5419566 22 49 40.921 +54 19 56.66 LB 13.13 13.56 other Comm. 15 lc55954.png ch55954.png out55954.dat
16 2MASS 22494380+5421295 22 49 43.805 +54 21 29.55 EA 15.14 15.6 0.87521 2456894.348 min lc55167.png ch55167.png out55167.dat
17 2MASS 22500123+5447406 22 50 01.232 +54 47 40.65 LB 12.56 12.74 other Comm. 17 lc44797.png ch44797.png out44797.dat
18 2MASS 22500557+5424273 22 50 05.571 +54 24 27.37 EW 16.42 17.24 0.97045 2456917.192 min lc54221 .png ch54221 .png out54221.dat
19 2MASS 22501251+5415591 22 50 12.511 +54 15 59.18 L 14.32 14.69 other Comm. 19 lc39266.png ch39266.png out39266.dat
ni-ii-ii-ii-ii-ii-ii-ii-ii-ii—imi-ii-ii-ir
|20| ||2MASS 22501628+5501311 ¡22 50 16.281 +55 01 31.14|| BY || 13.051 13.091 || 0.9319812456928.1981 max || || ||lc34827.png||ch34827.png||out34827.dat
21 2MASS 22503120+5351341 22 50 31.209+53 51 34.14 EA 13.7 13.81 1.8013: 2456894.289 min lc25506.png ch25506.png out25506.dat
22 2MASS 22503213+5451020 22 50 32.140+54 51 02.07 EA 14.05 14.52 4.60365: 2456928.041 min 1c43517.png ch43517.png out43517.dat
23 2MASS 22503320+5325490 22 50 33.201 +53 25 49.07 EW 15.03 15.42 0.82147 2456928.277 min Comm. 23 lcl4791.png chl4791.png outl4791.dat
24 2MASS 22505128+5407477 22 50 51.282+54 07 47.76 EA 13.75 13.93 1.0651 2456928.127 min lc31633.png ch31633.png out31633.dat
25 2MASS 22510239+5400081 22 51 02.396+54 00 08.19 EA 14.78 15.11 1.7491 2456928.332 min Comm. 25 lc29067.png ch29067.png out29067.dat
26 2MASS 22510683+5326059 22 51 06.832+53 26 05.94 SR: 12.65 12.74 43.9 2456933.2 max Comm. 26 lcl4746.png chl4746.png outl4746.dat
27 2MASS 22511398+5426270 22 51 13.983+54 26 27.07 EA 13.9 <14.44 2.0753: 2456927.129 min lc53384.png ch53384.png out53384.dat
28 2MASS 22511431+5335287 22 51 14.318+53 35 28.77 LB 14.17 16.29 other Comm. 28 lc18645.png ch!8645.png out18645.dat
29 2MASS 22511552+5455183 22 51 15.528+54 55 18.39 LB 13.76 13.85 other Comm. 29 lc37609.png ch37609.png out37609.dat
30 2MASS 22511969+5304303 22 51 19.696+53 04 30.35 LB 11.93 12.14 other Comm. 30 lc05840.png ch05840.png out05840.dat
31 2MASS 22513364+5456207 22 51 33.642 +54 56 20.74 EW 13.38 13.66 0.84019 2456928.335 min Comm. 31 lc37254.png ch37254.png out37254.dat
32 2MASS 22514191+5405520 22 51 41.913+54 05 52.08 LB 13.03 13.19 other Comm. 32 lc31096.png ch31096.png out31096.dat
33 2MASS 22514326+5328205 22 51 43.269+53 28 20.53 EA 15.81 16.9 0.74386 2456927.222 min Comm. 33 lcl5790.png chl5790.png outl5790.dat
34 2MASS 22514494+5505441 22 51 44.949 +55 05 44.11 EA 15.08 <15.6 0.83307 2456927.717 min 1c3341 R.png ch33418.png ouL33418.dat
35 2MASS 22514555+5455417 22 51 45.558+54 55 41.73 LB 13.39 13.59 other Comm. 35 lc37536.png ch37536.png out37536.dat
36 2MASS 22515655+5303209 22 51 56.554+53 03 20.95 DSCT 13.12 13.17 0.085427 2456928.241 max Comm. 36 lc05358.png ch05358.png out05358.dat
37 2MASS 22515812+5426497 22 51 58.128+54 26 49.77 DSCT 13.141 13.201 0.1908176 2456927.228 max Comm. 37 lc53610.png ch53610.png out53610.dat
38 2MASS 22515854+5318505 22 51 58.540+53 18 50.55 EA 14.85 15.03 0.727191 2456928.199 min lcll656.png chll656.png outll656.dat
39 2MASS 22522038+5335505 22 52 20.386 +53 35 50.59 EW 16.04 16.36 0.32626 2456928.272 min lcl8805.png chl8805.png outl8805.dat
40 2MASS 22523182+5253496 22 52 31.824+52 53 49.68 EA 15.24 15.55 1.4004 2456917.141 min Ic016l2.png ch0!612.png out0l612.dat
41 2MASS 22523236+5329318 22 52 32.361 +53 29 31.85 EW 12.92 12.94 0.35313 2456894.207 min lcl5889.png chl5889.png outl5889.dat
42 2MASS 22523396+5427303 22 52 33.964 +54 27 30.33 EA 13.82 13.96 1.22815 2456892.163 min Comm. 42 lc53207.png ch53207.png out53207.dat
43 2MASS 22524069+5326228 22 52 40.690 +53 26 22.88 EW 16.3 16.71 0.26247 2456928.1 min lc!4721.png ch!4721.png outl4721.dat
44 2MASS 22524379+5355365 22 52 43.793 +53 55 36.51 EA 13.7 13.83 1.29230: 2456927.263 min lc26282.png ch26282.png out26282.dat
45 2MASS 22524756+5431242 22 52 47.562+54 31 24.21 RRAB: 14.67 14.76 0.77342 2456927.222 max lc51885.png ch51885.png out51885.dat
46 2MASS 22530286+5453525 22 53 02.868 +54 53 52.52 LB 12.25 12.37 other Comm. 46 lc42777.png ch42777.png out42777.dat
47 2MASS 22530429+5445300 22 53 04.299 +54 45 30.05 EA 15.09 15.33 1.03047 2456917.705 min lc46299.png ch46299.png out46299.dat
48 2MASS 22530709+5435346 22 53 07.098 +54 35 34.66 LB 14.18 14.35 other Comm. 48 lc50206.png ch50206.png out50206.dat
49 2MASS 22532119+5407369 22 53 21.194+54 07 36.99 EW 15.58 15.85 0.30759 2456928.171 min lc31794.png ch31794.png out31794.dat
Comments:
1.Minn=16m.21.
2. Possible DSCT type with P = 0.08506 d and JDO = 2456928.241.
3. J= llm.870, H = llm.199, K= 10m.991 (2MASS).
7. Minn = 15m.26.
9.Minn=15m.27.
11. J = 9m.384, H = 8m.392, K = 8m.079 (2MASS).
12. J = 8m.352, H = 7m.613, K = 7m.256 (2MASS).
13. EW type with twice longer period is possible (0.31671 d, JDO = 2456934.179).
14. J = 12m.425, H = 1 lm.904, K = llm.762 (2MASS).
15. J = 8m.256, H = 7m.217, K = 6m.809 (2MASS). The object is in the NSVS database: ID 3468452.
17. J = 8m.819, H = 7m.774, K = 7m.414 (2MASS).
19. J = llm.476, H = llm.770, K= llm.541 (2MASS).
23. Minn = 15m.36.
25. Minn = 15m.07.
26. J = 9m.648, H = 8m.659, K = 8m.387 (2MASS).
28. J = 10m.214, H = 8m.472, K = 7m.177 (2MASS).
29. J = 8m,760, H = 7m.695, K = 7m.241 (2MASS).
30. J = 6m.969, H = 5m.924, K = 5m.470 (2MASS). The object is in the NSVS database: ID 3470780.
31.Minn=13m.65.
32. J = 8m.588, H = 7m.616, K = 7m.219 (2MASS).
33. Minn = 16m.03.
35. J = 9m.788, H = 8m.713, K = 8m.385 (2MASS).
36. EW type with twice longer period (0.17079 d) is possible.
37. Twice longer period (0.572456 d) is possible. 42. Minn = 13m.90.
46. J = 8m.812, H = 7m.825, K = 7m.439 (2MASS).
48. J = 10m.510, H = 9m.486, K = 9m.074 (2MASS).
Remarks:
We present the second part of new discoveries of variable stars in Lacerta: area of 2°.3x2°.3, center a=22h50m8 —54°00'(2000.0). Some of the objects are newly discovered, some are already known from massive surveys like ZTF and ASAS-SN.
Our observations of an area in Lacerta were performed in 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 FLIML9000 CCD chip (3056 x 3056 pixels, pixel size 12 jun). 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 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). We used VaST software (Sokolovsky & Lebedev 2018) to search for variable stars. To perform periodogram analysis, we applied WinEfk software provided by V.P. Goranskij.
This work was supported by Ministry of Education and Science of Russian Federation within the framework of state contract 3.6822.2017/7.8.
Acknowledgements: The authors are grateful to 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., Girard, T. M. et al., 2013, Astron. J., 145,44, The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
