卡特琳娜实时瞬态调查的第一批结果
First Results from the Catalina Real-time Transient Survey
摘要：
我们报告的结果，从前六个月的卡塔利娜实时瞬态调查（CRTS）。为了寻找时间尺度为几分钟到几年的光学瞬变，CRTS分析了卡特琳娜巡天的数据，这些数据重复覆盖了天空中26000平方度的区域。CRTS提供了一个公共的瞬变流，这些瞬变流足够明亮，可以使用小型望远镜进行跟踪。自调查开始以来，所有CRTS瞬变都已通过HTML表格，RSS提要和VOEvents实时提供给世界各地的天文学家。作为我们公共宣传计划的一部分，现在也可以通过Google Sky在KML中进行检测。最初的发现包括超过350个独特的光学瞬变，从过去的测量上升超过两个量级。根据光变曲线、先前的深度成像和光谱数据，其中62颗被归类为超新星。77个是由于灾难性的变量（只有13个以前已知），而另外100个瞬态太不频繁采样，以区分微弱的CV和SNe。剩下的光学瞬变包括活动星系核、耀变体、高自行星、高变星（如鲸鱼座UV星）和未知性质的瞬变。我们的研究结果表明，由于选择偏差，目前许多超新星调查都错过了大量的SNe。这些物体似乎与暗淡的宿主星系有关。我们还讨论了通过戏剧性的日食意外发现白矮星双星系统。
英文摘要：
We report on the results from the first six months of the Catalina Real-time Transient Survey (CRTS). In order to search for optical transients with timescales of minutes to years, the CRTS analyses data from the Catalina Sky Survey which repeatedly covers twenty six thousand of square degrees on the sky. The CRTS provides a public stream of transients that are bright enough to be followed up using small telescopes. Since the beginning of the survey, all CRTS transients have been made available to astronomers around the world in real-time using HTML tables, RSS feeds and VOEvents. As part of our public outreach program the detections are now also available in KML through Google Sky. The initial discoveries include over 350 unique optical transients rising more than two magnitudes from past measurements. Sixty two of these are classified as supernovae, based on light curves, prior deep imaging and spectroscopic data. Seventy seven are due to cataclysmic variables (only 13 previously known), while an additional 100 transients were too infrequently sampled to distinguish between faint CVs and SNe. The remaining optical transients include AGN, Blazars, high proper motions stars, highly variable stars (such as UV Ceti stars) and transients of an unknown nature. Our results suggest that there is a large population of SNe missed by many current supernova surveys because of selection biases. These objects appear to be associated with faint host galaxies. We also discuss the unexpected discovery of white dwarf binary systems through dramatic eclipses.
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