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Title:
Comprehensive Multi-waveband Monitoring of Gamma-ray Bright Blazars
Authors:
Marscher, Alan P.; Jorstad, S. G.; Larionov, V. M.; Chatterjee, R.; D'Arcangelo, F.; Manne-Nicholas, E.; Olmstead, A. R.; McHardy, I. M.; Agudo, I.; Gomez, J. L.; Aller, M. F.; Hagen-Thorn, V. A.; Gear, W. K.; Porter, D.
Affiliation:
AA(Boston Univ), AB(Boston Univ), AC(St. Petersburg State U., Russian Federation), AD(Boston Univ), AE(Boston Univ), AF(Boston Univ), AG(Boston Univ), AH(U. of Southampton, United Kingdom), AI(Insituto de Astrofisica de Andalucia, Spain), AJ(Insituto de Astrofisica de Andalucia, Spain), AK(U. of Michigan), AL(St. Petersburg State U., Russian Federation), AM(Cardiff U., United Kingdom), AN(Cardiff U., United Kingdom)
Publication:
American Astronomical Society, AAS Meeting #213, #326.03; Bulletin of the American Astronomical Society, Vol. 41, p.382
Publication Date:
01/2009
Origin:
AAS
Bibliographic Code:
2009AAS...21332603M

Abstract

We are monitoring 29 blazars with monthly VLBA polarimetric imaging at 43 GHz, occasional VLBA imaging at 86 GHz, and polarimetry at 90 GHz with the IRAM 30 m telescope and at optical wavelengths with the Lowell Observatory Perkins Telescope, the Calar Alto 2.2 m telescope, the Crimean Astrophysical Observatory 0.7 m telescope, and the St. Petersburg State U. 0.4 m telescope; optical and near-IR photometry with the robotic 2 m Liverpool Telescope. We observe 5 of the objects 2-7 times per week at 2.4-10 keV X-ray energies with RXTE. All but two blazars in our sample were detected as gamma-ray sources by EGRET. We will present our light curves, sequences of VLBI images, and polarization data alongside data from the first 5 months of gamma-ray observations with the Fermi LAT detector for the 15 blazars from our program for which Fermi data are publicly available. These include, for example, the August-September 2008 gamma-ray outbursts of the quasars PKS 1510-089 and 3C 454.3 and the BL Lac object 0235+164. Relative timing of flares, polarization events, and motions of superluminal knots allow us to determine where the high-energy emission occurs relative to the core seen on the VLBA images.

The research at Boston U. was supported by NSF grant AST-0406865 and NASA grants NNX06AG86G (RXTE), NNX08AJ64G (ADP), and NNX08AV65G (Fermi).

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