星明天文台

国内外享有盛誉的业余天文台,在这里汇聚了众多的顶尖爱好者。我们致力于彗星,小行星,超新星,新星等各类新天体的发现。

孙国佑 XM04GS = PNV J21581852+2419246 * 矮新星

已有论文真实这是一颗矮新星
VSNET报告称这是一颗新矮新星。
OT J215818.5+241925 superhump period We have received observations of this new dwarf nova
(=PNV J21581852+2419246) from Enrique de Miguel and Ian Miller. As already reported, there
are clear superhumps. The mean period determined from this single-night data is 0.0675(2) d.
My opinion is that people should use “PNV” only when there is reasonable possibility for a nova.

报告地址:
报告地址:
http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-campaign-dn/8145
http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-campaign-dn/8147
我还没搞清,VSNET是否觉有权威性,联系的国台,云南天文台拍摄光谱无果。无法定性,CBAT也没给发个公报。但是现在基本可以确认这是一颗新的大熊座SU型矮新星(A New SU UMa-Type Dwarf Nova),因为观测到了明确的Superhump现象。大约0.2等的光变,周期大约0.0675天,AAVSO也对其进行了长时间的观测(http://www.aavso.org/ql/results?auid=000-BKF-543&startjd=2455795.06944)。各种资料表明,此目标,历史上没有被观察到爆发过。我现在还无法搞清,矮新星权威的确认报告发在哪里,还有确认的标准是什么,如果获得确认,这将是国内爱好者发现的第一颗矮新星。
27日晚,我在搜索超新星过程中,在飞马座发现一颗疑似银河系新星。这颗目标相当有趣,在dss中发现一个暗弱对应大概20等上下,该目标有14.5等。如果是新星这个亮度应该还会增加,至少到10等。我查了资料发现,飞马座,历史上从来没发现过新星,有趣有趣。后来才知道,原来这是颗矮新星。

POSSIBLE NOVA IN Pegasus

Guoyou Sun(Wenzhou, Zhejiang, China) and Xing Gao (Urumqi, Xinjiang, China),report the discovery of a possible supernova (mag approximately 14.5) on several 40-s survey images (limiting mag about 19.0)taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Oct 27.64362 UT using a unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9 ). The new object approximately located at R.A.=21h58m18s.52 Decl.=+24°19’24”.6 (equinox 2000.0). Nothing is visible at this position on archival images taken on Oct.14 (limiting mag 19) and on the DSS(POSS2/UKSTU Red) from Oct. 11,1990(limiting mag about 19.8).

NET USNO-A2.0

XM04GS C2011 10 27.64362 21 58 18.52 +24 19 24.6 14.5 V C42
All images can be seen from: http://www.xjltp.com/XOSS/XM04GS/XM04GS.htm

C42 Xingming Observatory, Mt. Nanshan. Observers G.Sun,X.Gao ,Measurers G.Sun. 0.356-m f/6.9 Schmidt-Cassegrain telescope and CCD.

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