papers
Publications (3)
astro-ph.CO2009
Variability and stability in blazar jets on time scales of years: Optical polarization monitoring of OJ287 in 2005-2009
C. Villforth, K. Nilsson, J. Heidt +45
astro-ph.SR2019
Spectral observations of X Persei: Connection between H-alpha and X-ray emission
R. Zamanov, K. A. Stoyanov, U. Wolter +2
astro-ph2008
A massive binary black-hole system in OJ287 and a test of general relativity
M. J. Valtonen, H. J. Lehto, K. Nilsson +23