论文标题
Atacama宇宙学望远镜：MM波瞬态来源的检测
The Atacama Cosmology Telescope: Detection of mm-wave transient sources
论文作者
论文摘要
我们使用Atacama Cosmology望远镜的数据报告了三个瞬态MM波源的偶然发现。第一个检测到Ra = 273.8138，DEC = -49.4628 $ {\ sim}50σ$总数从少于5 mjy到150 GHz的至少1100 mjy，而不知情的上升时间短于三天，在此期间，从250 mjy增加到1100 mjy，只需花费1100 mjy，只有8分钟的时间。在2019-11-8观察到最大通量。源的光谱指数在90至150 GHz之间的磁通量为正，$α= 1.5 \ pm0.2 $。第二个在ra = 105.1584，dec = -11.2434 $ {\ sim} 20σ$总数从少于20 mjy亮到至少300 mjy，在150 GHz时至少亮了300 mjy，较短的上升时间短于八天。在2019-12-15观察到最大通量。它的频谱指数也为正，$α= 1.8 \ pm0.2 $。第三个在RA = 301.9952，DEC = 16.1652 $ {\ sim}40σ$总数从少于8 mjy照亮到至少300 mjy，在一天或更少的时间内，在150 GHz时，但几天内就会衰减。在2018-9-11观察到最大通量。它的光谱大约是平坦的，光谱指数为$α= -0.2 \ pm0.1 $。这些源没有两极分化到这些测量值的极限。这两个升起的光谱来源与M和K星相吻合，而第三个则与G星相吻合。
We report on the serendipitous discovery of three transient mm-wave sources using data from the Atacama Cosmology Telescope. The first, detected at RA = 273.8138, dec = -49.4628 at ${\sim}50σ$ total, brightened from less than 5 mJy to at least 1100 mJy at 150 GHz with an unknown rise time shorter than thirteen days, during which the increase from 250 mJy to 1100 mJy took only 8 minutes. Maximum flux was observed on 2019-11-8. The source's spectral index in flux between 90 and 150 GHz was positive, $α= 1.5\pm0.2$. The second, detected at RA = 105.1584, dec = -11.2434 at ${\sim}20σ$ total, brightened from less than 20 mJy to at least 300 mJy at 150 GHz with an unknown rise time shorter than eight days. Maximum flux was observed on 2019-12-15. Its spectral index was also positive, $α= 1.8\pm0.2$. The third, detected at RA = 301.9952, dec = 16.1652 at ${\sim}40σ$ total, brightened from less than 8 mJy to at least 300 mJy at 150 GHz over a day or less but decayed over a few days. Maximum flux was observed on 2018-9-11. Its spectrum was approximately flat, with a spectral index of $α= -0.2\pm0.1$. None of the sources were polarized to the limits of these measurements. The two rising-spectrum sources are coincident in position with M and K stars, while the third is coincident with a G star.
