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VSOP monitoring of the compact BL Lac object AO 0235+164
S. Frey, L. I. Gurvits, D. C. Gabuzda +7
In 1999, the highly compact and variable BL Lac object AO 0235+164 was identified as the highest brightness temperature active galactic nucleus observed with the VLBI Space Observa…
A Multi-wavelength View of the TeV Blazar Markarian 421: Correlated Variability, Flaring, and Spectral Evolution
M. Blazejowski
We report results from a multi-wavelength monitoring campaign on Mrk 421 over the period of 2003-2004. The source was observed simultaneously at TeV and X-ray energies, with suppor…
Sub-milliarcsecond Imaging of Quasars and Active Galactic Nuclei. IV. Fine Scale Structure
Y. Y. Kovalev, K. I. Kellermann, M. L. Lister +11
We have used VLBA fringe visibility data obtained at 15 GHz to examine the compact structure in 250 extragalactic radio sources. For 171 sources in our sample, more than half of th…
The WEBT campaign to observe AO 0235+16 in the 2003-2004 observing season
C. M. Raiteri, M. Villata, M. A. Ibrahimov +2
A multiwavelength campaign on the BL Lac object AO 0235+16 has been organized by the WEBT collaboration during the observing seasons 2003-2004 and 2004-2005. Here we report on the…
Intrinsic Curvature in the X-ray Spectra of BL Lacertae Objects
Eric S. Perlman, Greg Madejski, Markos Georganopoulos +10
We report results from {\it XMM-Newton} observations of thirteen X-ray bright BL Lacertae objects, selected from the {\it Einstein} Slew Survey sample. The survey was designed to l…