ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] Concerning point (a), we stated in our paper2 that the Yale magnitudes were photographic. The Yale quasar patrol has been carried out, principally, without filters because (1) the Yale 40 inch telescope is a reflector, and (2) a quartz field flattener is used in our photographic camera. Thus, by ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/225366a0
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