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Radio to X-ray Energy Distribution of BL Lacertae Objects

Published online by Cambridge University Press:  19 July 2016

P. Giommi ,
S. G. Ansari  and
A. Micol
P. Giommi
Affiliation:
ESIS, Information Systems Division of ESA, ESRIN, Frascati, Italy
S. G. Ansari
Affiliation:
ESIS, Information Systems Division of ESA, ESRIN, Frascati, Italy
A. Micol
Affiliation:
ESIS, Information Systems Division of ESA, ESRIN, Frascati, Italy

Abstract

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We have constructed radio to X-ray energy distributions for a large number of BL Lacertae objects using archival data. We find that Radio to optical spectra of RBLs and XBLs are very similar. Large differences are seen at higher frequencies where RBLs very frequently show a cutoff near the optical band while XBLs usually do not show any turnover before UV/X-ray energies. Our data is consistent with a picture where RBL and XBL are from the same parent population, the XBL simply being those (rare) objects where the break in the energy distribution is located at high energy.

Type
Poster contributions: Statistical Studies and Evolution
Information
Symposium - International Astronomical Union , Volume 159: Multi-Wavelength Continuum Emission of AGN , 1994 , pp. 506 - 507
Copyright
Copyright © Kluwer 1994 

References

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