Astrophysics (Index)About

photometric redshift

(method of estimating redshift without spectroscopy)

Photometric redshift (photo-z) is an estimate of an object's redshift using photometry. The expected appearance of various objects at various redshifts under various filters (photometric system) are calculated and compared to observed bodies for a match. Spectroscopic redshift (spectro-z) has become more common with the development of more efficient spectroscopes.

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