Search Results for author: C. S. Kochanek

Found 4 papers, 3 papers with code

The ASAS-SN Catalog of Variable Stars II: Uniform Classification of 412,000 Known Variables

1 code implementation19 Sep 2018 T. Jayasinghe, K. Z. Stanek, C. S. Kochanek, B. J. Shappee, T. W. -S. Holoien, Todd A. Thompson, J. L. Prieto, Subo Dong, M. Pawlak, O. Pejcha, J. V. Shields, G. Pojmanski, S. Otero, C. A. Britt, D. Will

The variable stars in the VSX catalog are derived from a multitude of inhomogeneous data sources and classification tools.

Solar and Stellar Astrophysics

Is Quasar Optical Variability a Damped Random Walk?

3 code implementations16 Feb 2012 Ying Zu, C. S. Kochanek, Szymon Kozłowski, Andrzej Udalski

We find good agreement with the DRW model on time scales that are well sampled by the data (from a month to a few years), possibly with some intrinsic scatter in the additional parameters, but this conclusion depends on the statistical test employed and is sensitive to whether the estimates of the photometric errors are correct to within ~10%.

Cosmology and Nongalactic Astrophysics

An Alternative Approach To Measuring Reverberation Lags in Active Galactic Nuclei

3 code implementations3 Aug 2010 Ying Zu, C. S. Kochanek, Bradley. M. Peterson

We redetermine the lags for 87 emission lines in 31 quasars and reassess the BLR size--luminosity relationship using 60 H-beta lags.

Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics

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