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Multifrequency Monitoring of the Blazar PKS 2005-489

Published online by Cambridge University Press:  05 March 2013

Travis Rector ,
Eric Perlman ,
Rita Sambruna ,
Greg Madejski ,
Frederik Rantakyro  and
CANGAROO collaboration
Travis Rector
Affiliation:
National Optical Astronomy Observatory, 950 N. Cherry Ave, Tucson, AZ, USA, 85719; rector@noao.edu
Eric Perlman
Affiliation:
University of Maryland BC, 1000 Hilltop Circle, Baltimore, MD, USA, 21250; perlman@jca.umbc.edu
Rita Sambruna
Affiliation:
George Mason University, Department of Physics & Astronomy, 4400 University Drive, Fairfax, Virginia, USA 22030-4444; rms@physics.gmu.edu
Greg Madejski
Affiliation:
Stanford Linear Accelerator Center, 2575 Sand Hill Road, Menlo Park, CA 94025; madejski@slac.stanford.edu
Frederik Rantakyro
Affiliation:
European Southern Observatory, Alonso de Cordova 3107, Vitacura, Santiago, Chile; frantaky@eso.org
CANGAROO collaboration
Affiliation:
Contact: Hidetoshi Kubo, Kyoto University, Department of Physics, Kyoto University, Sakyo-ku, Kyoto, Japan 606-8502; kubo@cr.scphys.kyoto-u.ac.jp
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Abstract

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We present a multifrequency monitoring campaign of PKS 2005–489, a bright and highly variable blazar. Simultaneous observations were completed over a 13 day period in the X-ray with RXTE, in the optical at the CTIO 0.9 m telescope, at TeV energies with CANGAROO-II, and at submillimetre wavelengths with SEST. Previous multiwavelength monitoring campaigns of PKS 2005–489 and other blazars have found complex flux and spectral variability behaviour, with different modes and timescales from days to hours and shorter.

PKS 2005–489 was observed in transition from a quiescent state into the early stages of a flare. A gradual increase in flux density was observed at optical and X-ray wavelengths during 19–27 August 2000, and a dramatic increase in X-ray emission was observed starting on 2 September 2000. Intraday and spectral variability were not detected during the campaign.

Keywords

BL Lacertae objects: individual (PKS 2005–489)
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 19 , Issue 1 , 2002 , pp. 158 - 160
Copyright
Copyright © Astronomical Society of Australia 2002

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