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Дата изменения: Wed Apr 26 06:28:24 2006 Дата индексирования: Sun Apr 10 05:31:00 2016 Кодировка: Поисковые слова: dust |
Follow-up observations with the University of Washington 0.76 m telescope at Manastash Ridge Observatory (MRO) of the Sloan Digital Sky Survey (SDSS) cataclysmic variable (CV) SDSS J170053+400358 are presented. Light curves were produced using a sine curve fitting program in Mathematica in order to determine the orbital period of this binary system. Photometric observations provided key information about the nature of this system. Light curves were produced from hundreds of images taken during two nights of observations in order to determine the period of this binary star system.
G. Gonzalez, University of Washington, writes that he obtained differential CCD photometry of HD 209458 during Nov. 22.07-22.35 UT, using the the Manastash Ridge Observatory 0.76-m telescope, with C. Laws and M. Braunstein. An 8-nm-side filter centered at 673 nm was used to obtain images every about 3 min. They detect a dimming of HD 209458 starting at Nov. 22.28 +/- 0.015 day, but they did not observe long enough to see last contact, due to the low altitude of the star. They estimate that the dimming amounted to about 0.028 mag (using two comparison stars that were each about 4 mag fainter than HD 209458).
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