ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] A clear distinction exists between the variable, steep slope QSOs which often show strong and variable optical polarisation, and the less variable QSOs with lower spectral index which do not6'7. The former resemble the BL Lac objects in the steepness of their optical spectra and in their optical ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/280215a0
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