Herschel-ATLAS：SDP场中的耀变体
Herschel-ATLAS: blazars in the SDP field
摘要：
为了研究耀变体的亚毫米计数和光谱特性，我们在赫歇尔-ATLAS（H-ATLAS）科学演示阶段（SDP）巡天目录中搜索了这些。我们交叉匹配的500 $μ$ m源亮度超过50毫焦耳与第一无线电目录。我们发现了两颗耀变体，都是之前已知的。我们的研究是第一个在亚毫米波长的盲blazar搜索，即，在光谱制度，仍然知之甚少的耀变体，但最明亮的耀变体的同步加速器峰值预计会发生。我们的早期结果是一致的受过教育的外推较低的频率计数和问题的迹象，大量的光谱曲率向下和光谱在毫米波长的上升。两个耀变体中的一个被确认为费米/LAT $γ$射线源和WMAP源。这些观测结果表明，H-ATLAS巡天将提供有关blazar物理及其对亚毫米计数贡献的关键信息。
英文摘要：
To investigate the poorly constrained sub-mm counts and spectral properties of blazars we searched for these in the Herschel-ATLAS (H-ATLAS) science demostration phase (SDP) survey catalog. We cross-matched 500$μ$m sources brighter than 50 mJy with the FIRST radio catalogue. We found two blazars, both previously known. Our study is among the first blind blazar searches at sub-mm wavelengths, i.e., in the spectral regime where little is still known about the blazar SEDs, but where the synchrotron peak of the most luminous blazars is expected to occur. Our early results are consistent with educated extrapolations of lower frequency counts and question indications of substantial spectral curvature downwards and of spectral upturns at mm wavelengths. One of the two blazars is identified with a Fermi/LAT $γ$-ray source and a WMAP source. The physical parameters of the two blazars are briefly discussed.These observations demonstrate that the H-ATLAS survey will provide key information about the physics of blazars and their contribution to sub-mm counts.
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