阿塔卡马宇宙学望远镜：3天图的系统性暂现源搜寻
The Atacama Cosmology Telescope: Systematic Transient Search of 3-Day Maps
AI总结：
本研究利用阿塔卡马宇宙学望远镜三年数据开展暂现源系统性搜寻，经3天图分析得到29个暂现源，排除已知、已发表及噪声不可靠源后，发现14个与恒星相关的新暂现事件，其谱型对应不同辐射机制。
摘要：
我们利用阿塔卡马宇宙学望远镜（ACT）2017-2019年的三年数据，开展了暂现源的系统性搜寻。ACT在77 GHz至277 GHz的三个波段上覆盖了40%的天区。我们对经过点源匹配滤波、扣除均值的3天天图开展分析，共探测到29个暂现源。其中8个暂现源来自已知小行星，另有3个已在先前研究中发表。还有4个事件位于噪声模型较差的天区，因此我们无法确定它们是真实暂现源。最终我们得到14个新的暂现事件，分布在11个不同位置。所有这些事件都与自转变星或冷星相关。10个事件具有平坦或下降的谱型，表明其辐射来自同步辐射。1个事件具有上升谱型，表明其耀发的驱动机制有所不同。
英文摘要：
We conduct a systematic search for transients in three years of data (2017-2019) from the Atacama Cosmology Telescope (ACT). ACT covers 40 percent of the sky at three bands spanning from 77 GHz to 277 GHz. Analysis of 3-day mean-subtracted sky maps, which were match-filtered for point sources, yielded 29 transients detections. Eight of these transients are due to known asteroids, and three others were previously published. Four of these events occur in areas of with poor noise models and thus we cannot be confident they are real transients. We are left with 14 new transient events occurring at 11 unique locations. All of these events are associated with either rotationally variable stars or cool stars. Ten events have flat or falling spectra indicating radiation from synchrotron emission. One event has a rising spectrum indicating a different engine for the flare.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
