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- Centre National de la Recherche ScientifiqueFR32 papers
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4 papers · 2 filters
Keck Infrared Observations of GRO J0422+32 in Quiescence
Mark T. Reynolds, Paul J. Callanan, Alexei V. Filippenko
We present Keck K-band photometry and low-resolution H & K-band spectroscopy of the X-ray nova GRO J0422+32 obtained while the system was in the quiescent state. No clear ellipsoid…
Frequency-dependent time delays for strong outbursts in four blazars from the Metsahovi and UMRAO monitoring databases
T. B. Pyatunina, N. A. Kudryavtseva, D. C. Gabuzda +4
The combined data of the University of Michigan Radio Astronomy Observatory and Metsahovi Radio Observatory provide us with radio light curves for Active Galactic Nuclei monitored…
Simultaneous radio-interferometric and high-energy TeV observations of the gamma-ray blazar Mkn 421
P. Charlot, D. C. Gabuzda, H. Sol +2
The TeV-emitting BL Lac object Mkn 421 was observed with very long baseline interferometry (VLBI) at three closely-spaced epochs one-month apart in March-April 1998. The source was…
The milliarcsecond-scale jet of PKS 0735+178 during quiescence
I. Agudo, J. L. Gomez, D. C. Gabuzda +3
We present polarimetric 5 GHz to 43 GHz VLBI observations of the BL Lacertae object PKS 0735+178, spanning March 1996 to May 2000. Comparison with previous and later observations s…