2004MNRAS_353__654B.pdf (783.71 kB)
IMPZ: a new photometric redshift code for galaxies and quasars
journal contribution
posted on 2023-06-08, 06:43 authored by T S R Babbedge, M Rowan-Robinson, E Gonzáles-Solares, M Polletta, S Berta, I Pérez-Fournon, Seb OliverSeb Oliver, D M Salaman, M Irwin, S J WeatherleyWe present a combined galaxy–quasar approach to template-fitting photometric redshift techniques and show the method to be a powerful one. The code (ImpZ) is presented, developed and applied to two spectroscopic redshift catalogues, namely the Isaac Newton Telescope Wide-Angle Survey ELAIS N1 and N2 fields and the Chandra Deep Field North. In particular, optical size information is used to improve the redshift determination. The success of the code is shown to be very good, with ?z/(1 +z) constrained to within 0.1 for 92 per cent of the galaxies in our sample. The extension of template fitting to quasars is found to be reasonable, with ?z/(1 +z) constrained to within 0.25 for 68 per cent of the quasars in our sample. Various template extensions into the far-ultraviolet are also tested.
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Publication status
- Published
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- Published version
Journal
Monthly Notices of the Royal Astronomical SocietyISSN
0035-8711External DOI
Issue
2Volume
353Page range
654-672Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-11-16Usage metrics
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