Results 11 to 20 of about 47,826 (245)
Optimal multihump filter for photometric redshifts [PDF]
The Astronomical Journal, 2001 We propose a novel type filter for multicolor imaging to improve on the photometric redshift estimation of galaxies. An extra filter - specific to a certain photometric system - may be utilized with high efficiency.
Budavari, Tamas +4 more
core +6 more sources
Photometric Redshifts of Galaxies in COSMOS [PDF]
The Astrophysical Journal Supplement Series, 2006 We measure photometric redshifts and spectral types for galaxies in the COSMOS survey. We use template fitting technique combined with luminosity function priors and with the option to simultaneously estimate dust extinction (i.e. E(B-V)) for each galaxy.
A. Iovino +37 more
core +7 more sources
Photometric redshifts from reconstructed QSO templates [PDF]
The Astronomical Journal, 2001 From SDSS commissioning photometric and spectroscopic data, we investigate the utility of photometric redshift techniques to the task of estimating QSO redshifts. We consider empirical methods (e.g.
Alexander S. Szalay +21 more
core +6 more sources
Overconfidence in Photometric Redshift Estimation [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 We describe a new test of photometric redshift performance given a spectroscopic redshift sample. This test complements the traditional comparison of redshift {\it differences} by testing whether the probability density functions $p(z)$ have the correct {
Bhaskar, Ramya +2 more
core +4 more sources
Cosmology with photometric redshift surveys [PDF]
Royal Astronomical Society. Monthly Notices, 2004 We explore the utility of future photometric redshift imaging surveys for delineating the large-scale structure of the Universe, and assess the resulting constraints on the cosmological model.
Blake, Chris, Bridle, Sarah
core +9 more sources
Photometric Redshifts and Photometry Errors
The Astrophysical Journal, 2007 We examine the impact of non-Gaussian photometry errors on photometric redshift performance. We find that they greatly increase the scatter, but this can be mitigated to some extent by incorporating the correct noise model into the photometric redshift ...
D. Wittman +4 more
core +2 more sources
The effect of binary stars on photometric redshift for galaxies at z ~ 2.0 [PDF]
Astronomy & Astrophysics, 2014 Context.Determining photometric redshifts (photo-zs) of extragalactic sources to a high accuracy is paramount to measure distances in wide-field cosmological experiments. With only photometric information at hand, photo-zs are prone to systematic uncertainties in the intervening extinction and the unknown underlying spectral-energy distribution of ...
Yu Zhang, Jinzhong Liu
+12 more sources
RANDOM FORESTS FOR PHOTOMETRIC REDSHIFTS [PDF]
The Astrophysical Journal, 2010 The main challenge today in photometric redshift estimation is not in the accuracy but in understanding the uncertainties. We introduce an empirical method based on Random Forests to address these issues. The training algorithm builds a set of optimal decision trees on subsets of the available spectroscopic sample, which provide independent constraints
Samuel Carliles +4 more
openalex +2 more sources
PHOTOMETRIC REDSHIFTS OF SUBMILLIMETER GALAXIES [PDF]
The Astrophysical Journal, 2013 7 pages, 2 figures, submitted to ...
Sukanya Chakrabarti +6 more
openaire +3 more sources
DES science portal: Computing photometric redshifts [PDF]
Astronomy and Computing, 2018 Astronomy and computing 25, 58-80 (2018).
Gschwend, Julia +77 more
openaire +6 more sources