319 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Lawrence Berkeley National LaboratoryUS31 papers
- Pennsylvania State UniversityUS31 papers
- The Ohio State UniversityUS31 papers
- University of AlabamaUS31 papers
- University of California, BerkeleyUS31 papers
- University of DelawareUS31 papers
- University of Maryland, College ParkUS31 papers
- University of Wisconsin–MadisonUS31 papers
- Uppsala UniversitySE31 papers
- Chiba UniversityJP30 papers
- Clark Atlanta UniversityUS30 papers
- École Polytechnique Fédérale de LausanneCH30 papers
5 papers · 1 filter
Measuring the spin of the primary black hole in OJ287
M. J. Valtonen, S. Mikkola, D. Merritt +7
The compact binary system in OJ287 is modelled to contain a spinning primary black hole with an accretion disk and a non-spinning secondary black hole. Using Post Newtonian (PN) ac…
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
(Abridged) OJ287 is a BL Lac object that has shown double-peaked bursts at regular intervals of ~12 yr during the last ~40 yr. We analyse optical photopolarimetric monitoring data…
Black Holes in Active Galactic Nuclei
M. J. Valtonen, S. Mikkola, D. Merritt +7
Supermassive black holes are common in centers of galaxies. Among the active galaxies, quasars are the most extreme, and their black hole masses range as high as to $6\cdot 10^{10}…
Characterizations of Morita equivalent inverse semigroups
Jonathon Funk, Mark Lawson, Benjamin Steinberg
We prove that four different notions of Morita equivalence for inverse semigroups motivated by, respectively, -algebra theory, topos theory, semigroup theory and the theo…
Better Global Polynomial Approximation for Image Rectification
Christopher O. Ward
When using images to locate objects, there is the problem of correcting for distortion and misalignment in the images. An elegant way of solving this problem is to generate an erro…