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The UV-Optical-Near-IR Emission of BL Lacertae Objects

Published online by Cambridge University Press:  19 July 2016

R. Falomo ,
E. Pian ,
R. Scarpa  and
A. Treves
R. Falomo
Affiliation:
Osservatorio Astronomico di Padova, v. Osservatorio 5, 35122, Padova, Italy
E. Pian
Affiliation:
Scuola Internazionale Superiore di Studi Avanzati, via Beirut 2-4, 34014 Trieste, Italy
R. Scarpa
Affiliation:
Dipartimento di Astronomia dell'Università di Padova, v. Osservatorio 5, 35122 Padova, Italy
A. Treves
Affiliation:
Scuola Internazionale Superiore di Studi Avanzati, via Beirut 2-4, 34014 Trieste, Italy

Abstract

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Results from UV, optical and near-IR simultaneous observations for 11 BL Lac objects are reported. We find that for all but one source the spectral flux distribution can be described by a single power law (fv ∞ v−α) plus, where relevant, the contribution of the host galaxy. The comparison of the optical-near-IR and UV spectral indices for two samples of BL Lacs suggests the same picture for a larger sample of objects.

Type
Multi-wavelength Continuum Emission of AGN
Information
Symposium - International Astronomical Union , Volume 159: Multi-Wavelength Continuum Emission of AGN , 1994 , pp. 17 - 20
Copyright
Copyright © Kluwer 1994 

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