Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (623) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (16)
· Also-Read Articles (Reads History)
· Translate This Page
Statistical methods for astronomical data with upper limits. II - Correlation and regression
Isobe, T.; Feigelson, E. D.; Nelson, P. I.
AA(Pennsylvania State University, University Park), AB(Pennsylvania State University, University Park), AC(Kansas State University of Agriculture and Applied Science, Manhattan)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 306, July 15, 1986, p. 490-507. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Astronomy, Bivariate Analysis, Censored Data (Mathematics), Data Correlation, Data Reduction, Regression Analysis, Distribution Functions, Estimating, Infrared Astronomy Satellite, Monte Carlo Method, Radio Galaxies, Rank Tests, Seyfert Galaxies, Significance, Statistical Tests, X Ray Astronomy
Bibliographic Code:


Statistical methods for calculating correlations and regressions in bivariate censored data where the dependent variable can have upper or lower limits are presented. Cox's regression and the generalization of Kendall's rank correlation coefficient provide significant levels of correlations, and the EM algorithm, under the assumption of normally distributed errors, and its nonparametric analog using the Kaplan-Meier estimator, give estimates for the slope of a regression line. Monte Carlo simulations demonstrate that survival analysis is reliable in determining correlations between luminosities at different bands. Survival analysis is applied to CO emission in infrared galaxies, X-ray emission in radio galaxies, H-alpha emission in cooling cluster cores, and radio emission in Seyfert galaxies.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences

More Article Retrieval Options

HELP for Article Retrieval

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

Find Similar Abstracts:

Use: Authors
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
arXiv e-prints