Astronomy and Astrophysics – Astronomy
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...372l..71q&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 372, May 10, 1991, p. L71-L74. DFG-supported research.
Astronomy and Astrophysics
Astronomy
149
Bl Lacertae Objects, Quasars, Radio Astronomy, Radio Jets (Astronomy), Radio Sources (Astronomy), Data Reduction, Light Curve, Very Large Array (Vla)
Scientific paper
Results are presented from simultaneous optical and radio observations of the BL Lacertae object 0716 + 714. During a 4-week period of continuous monitoring the source displayed in both wavelength regimes a transition between states of fast and slow variability with a change of the typical variability time scale from about 1 day to about 7 days. The simultaneous transition is interpreted as evidence for intrinsic source variability, and some consequences for the optical and radio emission regions are discussed.
Anton Klaus
Erkens Ulrike
Haehnelt Martin
Johnston Ken J.
Krichbaum Thomas P.
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