Peremennye Zvezdy

"Peremennye Zvezdy",
Prilozhenie
,
vol. 12, N 11 (2012)

New Eclipsing Binaries in the OGLE-II Database (Part 1). The Carina Galactic Disk Fields

S. Huemmerich#1,2, K. Bernhard#1,3
#1. Bundesdeutsche Arbeitsgemeinschaft fuer Veraenderliche Sterne e.V. (BAV), Berlin, Germany;
#2. Braubach, Germany;
#3. Linz, Austria

Received:   15.06.2012;   accepted:   30.10.2012
(E-mail for contact: ernham@rz-online.de)


#NameOtherCoord (J2000)TypeMaxMinSystemPeriodEpoch (JD)typeSpCommentL.CurveFind.ChartData
1 OGLEII CAR-SC01 2765, 2MASS J11052668-614836811 05 26.68, -61 48 36.8EW16.4416.85I0.5794652450537.781min Comm. 1CAR_SC1_2765.jpg CAR_SC1_2765.txt
2 OGLEII CAR-SC01 5494, 2MASS J11051146-614457011 05 11.46, -61 44 57.1EA16.2817.00I2.01982450555.575min Comm. 2CAR_SC1_5494.jpg CAR_SC1_5494.txt
3 OGLEII CAR-SC01 46493, 2MASS J11055923-615058911 05 59.24, -61 50 58.9EA16.0316.41I2.232812450551.628min Comm. 3CAR_SC1_46493.jpg CAR_SC1_46493.txt
4 OGLEII CAR-SC01 69423, 2MASS J11055898-612254311 05 58.99, -61 22 54.3EW15.7216.23I0.3488682451583.772min Comm. 4CAR_SC1_69423.jpg CAR_SC1_69423.txt
5 OGLEII CAR-SC01 90562, 2MASS J11055545-605847011 05 55.46, -60 58 47.0EB/RS14.7614.92I1.1215772450492.900min Comm. 5CAR_SC1_90562.jpg CAR_SC1_90562.txt
6 OGLEII CAR-SC01 124846, 2MASS J11062757-611344011 06 27.58, -61 13 44.0EB15.8616.63I0.4883072451631.684min Comm. 6CAR_SC1_124846.jpg CAR_SC1_124846.txt
7 OGLEII CAR-SC01 127687, 2MASS J11062902-611038811 06 29.03, -61 10 38.9EA16.1416.73I2.624752450551.628min Comm. 7CAR_SC1_127687.jpg CAR_SC1_127687.txt
8 OGLEII CAR-SC01 158766, 2MASS J11064481-612725011 06 44.81, -61 27 25.1EA15.7715.96I8.30722450566.603min Comm. 8CAR_SC1_158766.jpg CAR_SC1_158766.txt
9 OGLEII CAR-SC02 17, 2MASS J11071601-615200111 07 16.02, -61 52 00.1EW13.7814.36I0.3872982450571.6252min Comm. 9CAR_SC2_17.jpg CAR_SC2_17.txt
10 OGLEII CAR-SC02 62822, 2MASS J11073187-612638111 07 31.87, -61 26 38.1EW16.1216.53I0.722402451296.491min Comm. 10CAR_SC2_62822.jpg CAR_SC2_62822.txt
11 OGLEII CAR-SC02 75768, 2MASS J11074687-610815411 07 46.88, -61 08 15.5EA15.9816.52I0.944762451709.513min Comm. 11CAR_SC2_75768.jpg CAR_SC2_75768.txt
12 OGLEII CAR-SC02 80302, 2MASS J11075716-610351911 07 57.17, -61 03 52.0EW16.3117.00I0.3045162450476.842min Comm. 12CAR_SC2_80302.jpg CAR_SC2_80302.txt
13 OGLEII CAR-SC02 95772, 2MASS J11075903-613403211 07 59.04, -61 34 03.2EA16.2016.99I3.3112450534.703min Comm. 13CAR_SC2_95772.jpg CAR_SC2_95772.txt
14 OGLEII CAR-SC02 134876, 2MASS J11083117-613418211 08 31.18, -61 34 18.2EA14.1014.62I1.496382451397.495min Comm. 14CAR_SC2_134876.jpg CAR_SC2_134876.txt
15 OGLEII CAR-SC02 138173, 2MASS J11085136-613145311 08 51.36, -61 31 45.4EA16.3616.66I1.656662450919.659min Comm. 15CAR_SC2_138173.jpg CAR_SC2_138173.txt
16 OGLEII CAR-SC03 11336, 2MASS J11091328-610728811 09 13.28, -61 07 28.9EW15.0315.40I0.4592732451245.708min Comm. 16CAR_SC3_11336.jpg CAR_SC3_11336.txt
17 OGLEII CAR-SC03 59276, 2MASS J11094761-610116611 09 47.62, -61 01 16.6EA14.7415.17I0.867772451332.533min Comm. 17CAR_SC3_59276.jpg CAR_SC3_59276.txt
18 OGLEII CAR-SC03 80858, 2MASS J11094631-603011511 09 46.31, -60 30 11.6EB15.6616.37I0.6521172450488.866min Comm. 18CAR_SC3_80858.jpg CAR_SC3_80858.txt
19 OGLEII CAR-SC03 80896, 2MASS J11092812-602746811 09 28.12, -60 27 46.9EW16.0516.65I0.3146242451332.533min Comm. 19CAR_SC3_80896.jpg CAR_SC3_80896.txt
20 OGLEII CAR-SC03 123980, 2MASS J11103631-611956511 10 36.32, -61 19 56.6EA16.4417.12I2.4662450566.562min Comm. 20CAR_SC3_123980.jpg CAR_SC3_123980.txt

Comments:


1. MinII = 16.83. J – K = 0.940 (2MASS).

2. MinII = 16.85. J – K = 0.509 (2MASS). The K magnitude in the 2MASS catalogue is an upper limit or has a very poor quality.

3. MinII = 16.36. J – K = 0.831 (2MASS). Eccentric system; secondary eclipse at phase 0.45.

4. MinII = 16.12. J – K = 0.469 (2MASS).

5. MinII = 14.88. J – K = 0.414 (2MASS).

6. MinII = 16.19. J – K = 0.690 (2MASS). Shows O'Connell effect.

7. MinII = 16.71. J – K = 0.912 (2MASS).

8. MinII = 15.87. J – K = 0.498 (2MASS).

9. MinII = 14.28. J – K = 0.543 (2MASS).

10. MinII = 16.47. J – K = 0.575 (2MASS).

11. MinII = 16.09. J – K = 0.470 (2MASS).

12. MinII = 16.90. J – K = 0.772 (2MASS).

13. MinII = 16.51. J – K = 0.916 (2MASS).

14. MinII = 14.23. J – K = 0.462 (2MASS).

15. MinII = 16.45. J – K = 0.729 (2MASS). The K magnitude in the 2MASS catalogue is an upper limit or has a very poor quality.

16. MinII = 15.39. J – K = 0.768 (2MASS).

17. MinII = 15.00. J – K = 0.395 (2MASS).

18. MinII = 15.91. J – K = 0.662 (2MASS).

19. MinII = 16.50. J – K = 0.656 (2MASS).

20. MinII = 16.90. J – K = 1.054 (2MASS).

Remarks:
The publicly available data of the OGLE-II database (http://ogledb.astrouw.edu.pl/~ogle/photdb/) was searched for unrecorded eclipsing binaries. Only the lightcurves of objects with the following parameters were investigated:

number of good points, Ngood>=300;
percentage of good points, Pgood>=80;
standard deviation of I magnitude, Isig>=0.04;
median I magnitude, Imed<=17;
median error of I magnitude, Imederr<0.015.


Part 1 covers the OGLE-II (Szymański 2005, Udalski et al. 1997) Carina Galactic Disk Fields (CAR_SC1, CAR_SC2, CAR_SC3), from which the specified search returned 20 objects. All stars were checked against the Strasbourg CDS Vizier service and the International Variable Star Index for pre-existence in variability catalogues.

Amplitudes and periods were derived using the Period04 code (Lenz & Breger 2005). Astrometric positions were taken from the 2MASS catalogue (Skrutskie et al. 2006); near-infrared color indices from the 2MASS catalogue are presented in the Comments.

Acknowledgements: This publication makes use of the SIMBAD and VizieR databases operated at the Centre de Données Astronomiques (Strasbourg) in France, of the International Variable Star Index (AAVSO), and of the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation.

References:
Lenz, P., Breger, M., 2005, Comm. in Asteroseismology, 146, 53
Skrutskie, M.F., Cutri, R.M., Stiening, R., et al., 2006, Astron. J, 131, 1163
Szymański, M. K., 2005, Acta Astron., 55, 43
Udalski, A., Kubiak, M., Szymanski, M., 1997, Acta Astron., 47, 319



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