|Article in PDF||
vol. 7, N 9 (2007)
Received: 18.03.2007; accepted: 22.03.2007
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|I present my CCD photometry of DM Del, an eclipsing binary with variable orbital
data were obtained in November - December, 2006 at my small private observatory with
SBIG ST-7XMEl and photo lens Rubinar 5.6/500 (D=89.29 mm, F=475 mm) without filter.
A total of 785 images with 20-second exposures were obtained on 10 nights (November
2 - December
9, JD2454042 - 2454079, see attached data file).
Basic reduction of images (for dark current, flat field, and bias) was carried out with the CCDSoft; the astrometric solution and photometry, with the MaxIm DL software. The comparison and check stars were: comp = SAO 106351 (8.82 mag) and check = GSC 1100-00646 (9.69 mag).
Three epochs of the primary minimum were determined based on our photometry using the Minima v2.3 software by Dr. Bob Nelson:
2006 November 22: 2454062.1749;
2006 November 28: 2454068.0876;
2006 December 09: 2454079.0684.
I used the new epoch of minimum (HJD2454062.1749) and the period taken from the Brno database of times of minima and maxima (0.8446725 days, see http://var.astro.cz/ocgate/) to plot the phased light curve.
Acknowledgments: I would like to thank N. N. Samus, S. V. Antipin and A. V. Khruslov for helpful discussion.
The phased light curve of DM Del