宇宙 X 射线源，星系和河外星系。

Cosmic X-ray Sources, Galactic and Extragalactic.

出版信息

Science. 1966 Apr 1;152(3718):66-71. doi: 10.1126/science.152.3718.66.

DOI:10.1126/science.152.3718.66

Abstract

Instruments carried aboard an Aerobee rocket in April 1965 provided evidence for x-ray emission from the directions of the radio galaxies Cygnus A and M-87 and from the galactic supernova remnant Cassiopeia A. A survey of the Cygnus region revealed a marked decrease in the flux of x-rays from Cygnus XR-1, which was identified in June 1964 as the second brightest object in the first Naval Research Laboratory list of x-ray sources. The detection sensitivity was improved over previous surveys and several new sources were detected at lower flux levels.

摘要

1965 年 4 月，一枚 Aerobee 火箭携带的仪器提供了来自射电星系天鹅座 A 和 M-87 以及银河系超新星遗迹仙后座 A 的 X 射线辐射方向的证据。对天鹅座区域的一项调查显示，天鹅座 XR-1 的 X 射线通量明显减少，天鹅座 XR-1 于 1964 年 6 月被确定为海军研究实验室第一批 X 射线源列表中第二亮的天体。探测灵敏度较以往的调查有所提高，并且在较低的通量水平下探测到了几个新的源。