Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281b.387e&link_type=abstract
In ESA, Proceedings of the Celebratory Symposium on a Decade of UV Astronomy with the IUE Satellite, Volume 2 p 387-390 (SEE N89
Astronomy and Astrophysics
Astronomy
Correlation, Iue, Spaceborne Astronomy, Spectrum Analysis, Ultraviolet Astronomy, Ultraviolet Spectra, Power Spectra, Quasars, Seyfert Galaxies, Symmetry
Scientific paper
A method of measuring correlation functions without interpolating in the temporal domain, the discrete correlation function, is introduced. It provides an assumption-free representation of the correlation measured in the data, and allows meaningful error estimates. This method does not produce spurious correlations at zero lag due to correlated errors. It is shown that physical interpretation of active galactic nuclei cross-correlation functions requires knowledge of the input function's fluctuation power spectrum, involves model-dependence in the form of symmetry assumptions, and must take into account intrinsic scale bias. This technique was used to find a correlation in published IUE data for NGC 4151, which indicates that the broad C IV feature emanates from a shell 15 to 75 light-days in radius, assuming spherical symmetry.
Edelson Richard A.
Krolik Julian H.
No associations
LandOfFree
The discrete correlation function: A new method for analyzing unevenly sampled variability data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The discrete correlation function: A new method for analyzing unevenly sampled variability data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The discrete correlation function: A new method for analyzing unevenly sampled variability data will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1181078