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Re: Some new eclipsing binaries
Patrick,
I should have a few more observations on these when I get the current
pipeline reprocessed.
Tom Droege
At 03:27 PM 1/26/03 -0800, you wrote:
>I have analysed Stardial images (http://www.astro.uiuc.edu/stardial/)
>between 1999 and 2002, of a number of regions in the constellation
>Monoceros. To reduce the unfiltered, red sensitive CCD images to
>magnitude lists, use was made of programs written by Michael Richmond
>(see http://www.tass-survey.org, hereby gratefully acknowledged). The
>data revealed a number of new eclipsing binaries, which are listed
>below.
>
> RA Dec ID Type Ampl Epoch Freq c/d Note
>104.575 -4.635 HD 51697 EA 0.2 2452640.75 1.798
>105.271 -3.967 HD 52433 EA 0.3 2451586.64 1.339
>108.783 -4.745 HD296761 EW 0.7 2452233.88 1.722
>114.767 -2.657 BD-2 220 EW 0.4 2452323.65 1.440 BD-2 221?
>121.574 -4.447 HD 67093 EA 0.5 2452252.86 0.461
>
>Positions for 2000 are given in decimal degrees. One Stardial pixel
>corresponds to about 0.5', and the positional precision (averages over
>more than one hundred images) is on the order of 20".
>The identifications were made using Guide software
>(http://www.projectpluto.com) and the VizieR utility at the CDS in
>Strasbourg (http://vizier.u-strasbg.fr/cgi-bin/VizieR). Note that the
>stars BD-2 220 and BD-2 221 are blended on a Stardial image, therefore
>the true identification of the variable is not clear.
>
>The frequency (in cycles/day) is given as a guide only (for EW stars, 2
>minima are counted per cycle, for EA stars only one minimum): Stardial
>takes images separated by exactly one sidereal day, and the periodogram
>is therefore heavily contaminated with aliases. Any alias of the given
>frequency may be the correct one. One night's observations might
>reveal the true period.
>
>Observations are most welcome.
>
>Patrick
>
>
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