| Article in PDF |
"Peremennye Zvezdy", Prilozhenie, vol. 9, N 10 (2009) |
| #1. Astrotel Observatory, Karachay-Cherkessia, Russia;
#2. Surgut, Russia; #3. Space Research Institute (IKI), Moscow, Russia |
| ISSN 2221–0474 |
Received: 24.02.2009; accepted: 28.04.2009
(E-mail for contact: bredfild@mail.ru, sav@surgut.ru, denis@hea.iki.rssi.ru, bs25@mail.ru)
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Comments:
1. We observed four primary minima: HJD 2454846.3376, 2454853.3219, 2454854.2345, 2454874.2748. Min II = 17.42.
2. J-H = 0.532, H-K = 0.114 (2MASS).
3. We observed seven primary minima: HJD 2454784.4373, 2454833.4750, 2454846.5762, 2454853.2908, 2454860.3434, 2454874.4450, 2454877.4721. Min II = 15.94.
4. Six observed primary minima: HJD 2454831.5944, 2454846.4311, 2454854.4841, 2454860.4197, 2454874.4069, 2454877.3754. Min II = 15.74.
5. Ten observed primary minima: HJD 2454785.4200, 2454813.5790, 2454846.3368, 2454853.5219, 2454854.3857, 2454860.4152, 2454874.2122, 2454874.4985, 2454876.2260, 2454877.3740. Min II = 14.32 (V).
6. We observed four maxima: HJD 2454846.3823, 2454853.3507, 2454854.4179, 2454874.2702. J-H = 0.175, H-K = 0.069 (2MASS).
7. Four observed maxima: HJD 2454846.5657, 2454853.4483, 2454860.3318, 2454876.3929;
8. We observed three primary minima: HJD 2454813.5592, 2454853.4698, 2454874.4338. Min II = 16.43.
9. One observed primary minimum: HJD 2454877.4286. Min II = 17.15.Remarks:
During observations of a field in Gemini, we discovered 9 new variable stars. Our observations were carried out at the Astrotel-Caucasus observatory using the 300-mm Ritchey-Chretien telescope, equipped with an Apogee Alta U9000 CCD camera and a V filter. A total of 1669 images with 2-minute exposures were obtained on JD 2454742 - 2454877. For basic reductions for dark current, flat fields, and bias, we used MaxIm DL software. For search and photometry of new variable stars, we applied VaST software by Sokolovsky and Lebedev (2005). The comparison star was GSC 01915-00271 (07:32:13.91, +26:10:10.3, J2000; V = 12.83 from FON Astrographic Catalogue, Kislyuk et al. 1999 ). The coordinates of the variable stars in the table were drawn from the 2MASS catalogue (Cutri et al. 2003). For search for periods and epochs of primary minima, we use Peranso software (www.peranso.com).References:
Cutri, R.M., Skrutskie, M.F., van Dyk, S., et al., 2003, 2MASS All Sky Catalog of Point Sources, Centre de Donnees Astronomiques de Strasbourg, II/246
Kislyuk, V., Yatsenko, A., Ivanov, G., Pakuliak, L., Sergeeva, T., 1999, The FON Astrographic Catalogue (FONAC), Centre de Donnees Astronomiques de Strasbourg, I/261
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
