ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] The Rosat extended deep survey6 involved a sequence of overlapping pointed observations, spaced at 10' intervals, covering a 4° strip of sky near the North Galactic Pole. Over 210 X-ray sources were detected in this strip, most of which are expected to be distant quasars7. To pick out possible ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/369462a0
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