Analyzing the Multiwavelength Spectrum and Variability of BL Lacertae During the July 1997 Outburst

Abstract

The multiwavelength spectrum of BL Lacertae during its July 1997 outburst is analyzed in terms of different variations of the homogeneous leptonic jet model for the production of high-energy radiation from blazars. We find that a two-component gamma-ray spectrum, consisting of a synchrotron self-Compton and an external Compton component, is required in order to yield an acceptable fit to the broadband spectrum. Our analysis indicates that in BL Lac, unlike other BL Lac objects, the broad emission line region plays an important role for the high-energy emission. Several alternative blazar jet models are briefly discussed. In the appendix, we describe the formalism in which the process of Comptonization of reprocessed accretion disk photons is treated in the previously developed blazar jet simulation code which we use.

Now accepted for publication in The Astronomical Journal. Significantly extended discussion w.r.t. original version. 3 Figures included using epsf.sty, rotate.sty

References in corpus (12)

• A theoretical unifying scheme for gamma-ray bright blazars
• BeppoSAX Observations of Unprecedented Synchrotron Activity in the BL Lac Object Mkn 501
• Multiwavelength Observations of a Dramatic High Energy Flare in the Blazar 3C 279
• Rapid variability in the synchrotron self Compton model for blazars
• Synchrotron and SSC Emission and the Blast-Wave Model of Gamma-Ray Bursts
• Observations of a Correlated Gamma-Ray and Optical Flare for BL Lacertae
• X-ray Observations of BL Lacertae During 1997 Outburst and its Association with Quasar-like Characteristics
• A Viewing Angle - Kinetic Luminosity Unification Scheme For BL Lacertae Objects
• Broadband Spectral Analysis of PKS 0528+134: A Report on Six Years of EGRET Observations
• On Compton Scattering Scenarios for Blazar Flares
• Electron Acceleration and Synchrotron Radiation in Decelerating Plasmoids
• Variability in Blazars

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