Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...19912302m&link_type=abstract
American Astronomical Society, 199th AAS Meeting, #123.02; Bulletin of the American Astronomical Society, Vol. 33, p.1487
Astronomy and Astrophysics
Astronomy
Scientific paper
Using the NOAO Deep Wide-Field Survey pass-bands (B wRIJHK) we show that we can achieve reliable star-galaxy color separation and good photometric redshift estimates. Using simulated NDWFS object catalogs, we tested several methods of estimating photometric redshifts and quantified the accuracy as a function of the object type, magnitude, the number of colors available, and the estimation technique. Tests with simulated and real data sets show that B wIK photometry provides a clear separation between stars and galaxies to K ~19.5. Extending the analysis to additional colors enables us to separate AGNs from stars and galaxies over a broad range of redshifts. Applying color selection criteria, we can separate objects by type and improve our photometric redshift estimates. Valerie Mikles' research was supported by the NOAO/KPNO REU Program, funded by the National Science Foundation.
Brown Michael J. I.
Dey Arjun
Jannuzi Buell Tomasson
Mikles Valerie J.
Tiede Glenn P.
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