Advertisement

Nested Test for Point Sources

  • James Theiler
  • Jeff Bloch

Abstract

We describe an extension of a test proposed by Lampton for detecting weak and/or short-lived transient point sources in finite-resolution photon-limited maps of the sky. We test the null hypothesis that the count density is spatially uniform (i.e., no point sources) over a limited region of the sky by decomposing that region into a nested set of source regions and background annuli, and testing whether the count density in each source region differs significantly from the count density in each associated background. The tests are by construction independent, so a combined p-value can be rigorously defined.

References

  1. [1]
    M. Lampton. Two-sample discrimination of Poisson means. Astrophys. J., 436:784–786, 1994.CrossRefGoogle Scholar
  2. [2]
    H. L. Marshall. Tools for use with low signal/noise data. In D. R. Crabtree, R. J. Hanisch, and J. Barnes, editors, Astronomical Data Analysis Software and Systems III, volume 61 of ASP Conference Series, 1994.Google Scholar
  3. [3]
    R. Simes. An improved Bonferroni procedure for multiple tests of signficance. Biometrika, 73:751–754, 1986.MathSciNetMATHCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • James Theiler
  • Jeff Bloch

There are no affiliations available

Personalised recommendations