A cross-correlation method for surface photometry

Phillipps, S. and Davies, Jonathan Ivor 1991. A cross-correlation method for surface photometry. Monthly Notices of the Royal Astronomical Society 251 , pp. 105-111.

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Abstract

The cross-correlation technique familiar in spectral matching to the two-dimensional case of surface photometry of galaxies with low surface brightness, i.e., to a problem of surface photometry with low signal-to-noise ratio is applied. Comparison with normal profiling methods shows a considerable improvement in the accuracy with which photometric parameters can be obtained. In particular, for simulated images representing objects like GP 1444a which are fairly large but have extremely low surface brightness, errors of only about 2 and 3 per cent in the scalelength and central intensity, smaller by a factor about 6 than the errors obtained from intensity profiles are found.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	astronomical photometry, cross correlation, galaxies, brightness distribution, digital simulation, signal to noise ratios
Publisher:	Wiley
ISSN:	0035-8711
Last Modified:	04 Jun 2017 04:26
URI:	https://orca.cardiff.ac.uk/id/eprint/39096

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