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arXiv 1202.0689astro-ph.SR
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矮新星SDSS J093249 .57+472523.0的轨道周期和超峰周期

The orbital and superhump periods of the dwarf nova SDSS J093249.57+472523.0

Jeremy Shears, Steve Brady, Shawn Dvorak, Enrique de Miguel, Etienne Morelle, Arto Oksanen, Richard Sabo

摘要:

我们报告了食矮新星SDSS J093249.57+472523.0在2011年3月首次确认爆发期间获得的未经过滤的CCD测光。爆发的幅度至少比平均静止期高出3.0个星等,持续了至少11天,尽管我们错过了爆发的开始。爆发期间出现了峰间振幅高达0.3等的超级驼峰,从而确定它是SU UMa家族的成员。平均超峰期Psh = 0.06814(11)d。分析我们测量的最小日食时间,补充其他研究人员的数据,使我们能够测量轨道周期为Porb = 0.06630354(5)d。超峰周期的超额值为λ = 0.028(1),这与类似Porb的SU UMa系统一致。日食的半高宽持续时间在6 ~ 13分钟之间,食深可达1.6等。

英文摘要:

We report unfiltered CCD photometry of the eclipsing dwarf nova SDSS J093249.57+472523.0 obtained during its first confirmed outburst in 2011 March. The outburst amplitude was at least 3.0 magnitudes above mean quiescence and it lasted at least 11 days, although we missed the beginning of the outburst. Superhumps having peak-to-peak amplitude up to 0.3 magnitudes were present during the outburst, thereby establishing it to be a member of the SU UMa family. The mean superhump period was Psh = 0.06814(11) d. Analysis of our measurements of eclipse times of minimum, supplemented with data from other researchers, allowed us to measure the orbital period as Porb = 0.06630354(5) d. The superhump period excess was epsilon = 0.028(1) which is consistent with of SU UMa systems of similar Porb. The FWHM eclipse duration varied between 6 and 13 mins and the eclipse depth was up to 1.6 magnitudes.

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