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arXiv 0905.1866astro-ph.SR
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2008年激变变星V358的爆发

The 2008 outburst of the cataclysmic variable V358 Lyrae

Jeremy Shears, David Boyd, Tut Campbell, Shawn Dvorak, Robert Koff, Tom Krajci, Ian Miller, Gary Poyner, George Roberts, Arne Henden

摘要:

我们报告V358天琴座在2008年11月爆发期间的测光,这是自1965年以来首次确认的爆发。这颗恒星最亮时的亮度为V = 15.9,爆发幅度至少为7.3等,持续了至少23天。爆发的前4天对应于平台阶段,然后在接下来的7天内以0.13等/天的速度褪色。然后亮度下降到19.5等的暂时最低值,持续了不到4天,之后恒星恢复到以前的亮度。爆发的最后阶段没有得到很好的报道。时间分辨测光在爆发过程中没有发现明显的大尺度调制,如超级驼峰。虽然检测到一些小的明显的周期性信号,但它们的意义是不确定的。我们的观测结果以及之前研究人员的观测结果都支持V358 Lyr是一颗矮新星,并且与它是WZ Sge家族的成员相一致。

英文摘要:

We report photometry of V358 Lyr during its 2008 November outburst, the first confirmed outburst since 1965. At its brightest the star was V=15.9 and the outburst amplitude was at least 7.3 magnitudes and lasted at least 23 days. The first 4 days of the outburst corresponded to the plateau phase and the star then faded at 0.13 mag/d over the next 7 days. There was then a drop in brightness to a temporary minimum at mag 19.5, which lasted less than 4 days, after which the star recovered to its previous brightness. The final stages of the outburst were poorly covered. Time resolved photometry during the outburst revealed no obvious large-scale modulations such as superhumps. Although some small apparently periodic signals were detected, their significance is uncertain. Our observations, and those of previous researchers, support V358 Lyr being a dwarf nova and are consistent with it being a member of the WZ Sge family.

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