伽玛暴(Gamma-Ray Burst)笔记。记录有关伽玛暴的新文章,另外也包括看的老文章、自己的想法、以及跟天文相关的一些东西。 Feel free to leave me a message by comments or by email.

星期六, 一月 17, 2009

Singal 2009 射电背景辐射探测器ARCADE 2

主要内容:
相当于有了一个新的窗口. 3-90GHz

(不过不知道和地面的射电望远镜比, 有什么优势. 是地面的精于点状辐射体, 只能探测比地面背景等背景高的辐射吗?)

精彩摘抄:


文章信息:
The ARCADE 2 Instrument

Abstract: The second generation Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission (ARCADE 2) instrument is a balloon-borne experiment to measure the radiometric temperature of the cosmic microwave background and Galactic and extra-Galactic emission at six frequencies from 3 to 90 GHz. ARCADE 2 utilizes a double-nulled design where emission from the sky is compared to that from an external cryogenic full-aperture blackbody calibrator by cryogenic switching radiometers containing internal blackbody reference loads. In order to further minimize sources of systematic error, ARCADE 2 features a cold fully open aperture with all radiometrically active components maintained at near 2.7 K without windows or other warm objects, achieved through a novel thermal design. We discuss the design and performance of the ARCADE 2 instrument in its 2005 and 2006 flights.
Comments: 11 pages, 12 figues, 3 tables. To accompany companion papers Kogut et al, Fixsen et al, and Seiffert et al
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:0901.0546v1 [astro-ph]


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