An optimal extraction algorithm for imaging photometry

This paper is primarily an investigation of whether the ‘optimal extraction’ techniques used in CCD spectroscopy can be applied to imaging photometry. It is found that using such techniques provides a gain of around 10 per cent in signal-to-noise ratio over normal aperture photometry. Formally, it i...

Full description

Saved in:
Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 1998-05, Vol.296 (2), p.339-346
Main Author: Naylor, Tim
Format: Article
Language:English
Subjects:
methods: data analysis
techniques: image processing
techniques: photometric
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper is primarily an investigation of whether the ‘optimal extraction’ techniques used in CCD spectroscopy can be applied to imaging photometry. It is found that using such techniques provides a gain of around 10 per cent in signal-to-noise ratio over normal aperture photometry. Formally, it is shown to be equivalent to profile fitting, but offers advantages of robust error estimation, freedom from bias introduced by mis-estimating the point spread function, and convenience. In addition some other techniques are presented, which can be applied to profile fitting, aperture photometry and the ‘optimal’ photometry. Code implementing these algorithms is available at http://www.astro.keele.ac.uk/~timn/.
ISSN:0035-8711
1365-2966
DOI:10.1046/j.1365-8711.1998.01314.x