Optical Flux and Spectral Variability of the TeV Blazar PG 1553+113
نویسندگان
چکیده
منابع مشابه
Optical spectral variability of PG QSOs
In previous studies we have shown that the optical variability of quasars increases, on average, with redshift. We explained this dependance in terms of a hardening of the spectrum during bright phases, coupled with the increase of the rest-frame frequency for increasing red-shift. We re-analize now these correlations on the basis of new light curves of PG quasars, recently published by the Wis...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2019
ISSN: 1538-4357
DOI: 10.3847/1538-4357/aaf974