The Ultraviolet to Infrared Energy Distribution of the BL Lacertae Object PKS 0422+00 at Two Different Brightness Levels
Maraschi, L.; Tanzi, E. G.; Bouchet, P.; Falomo, R.; Treves, A.
Italy, Chile
Abstract
The BL Lacertae object PKS 0422+00 was observed with IUE (International Ultraviolet Explorer) on 1987 August 31-September 1, when the visual magnitude of the object was V = 16.2, and again ~ 4 months later (1988 Jan 10) during an active state (V = 15.6). Quasi-simultaneous optical to infrared observations allow deriving a detailed spectral flux distribution from 8 x 10^13^ to 2.5 x 10^15^ Hz, for each epoch. Fits in terms of broken power laws and logarithmic parabolas are discussed.