Results are presented from an X-ray survey of ∼50 square degrees of the high galactic latitude sky at sensitivities in the range 7·10-14 - 5·10-12 erg/cm2 sec (0·3-3·5 keV) carried out with the Imaging Proportional Counter (IPC) aboard the Einstein Observatory. The extragalactic sample consists of 48 sources which have been used to determine the number flux relation. The content of the sample is analyzed in terms of types of sources and is found to be significantly different from the content of similar samples selected at higher fluxes.
|Original language||English (US)|
|Number of pages||6|
|Journal||Space Science Reviews|
|State||Published - Mar 1 1981|
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science