Optimal multihump filter for photometric redshifts
نویسندگان
چکیده
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. We present a case study of the Hubble Space Telescope’s Advanced Camera for Surveys and show that one extra exposure could cut down the mean square error on photometric redshifts by 34% over the z < 1.3 redshift range. Subject headings: galaxies: distances and redshifts — galaxies: photometry — instrumentation: miscellaneous
منابع مشابه
Supernova Acceleration Probe: Investigating Photometric Redshift Optimization
The aim of this paper is to investigate ways to optimize the accuracy of photometric redshifts for a Supernova Acceleration Probe (SNAP)-like mission. We focus on how the accuracy of the photometric redshifts depends on the magnitude limit and signal-to-noise ratio (S/N), wavelength coverage, and the number of filters and their shapes and observed galaxy type. We use simulated galaxy catalogs c...
متن کاملSuperNova Acceleration Probe (SNAP): Investigating Photometric Redshift Optimization
The aim of this paper is to investigate ways to optimize the accuracy of photometric redshifts for a SNAP like mission. We focus on how the accuracy of the photometric redshifts depends on the magnitude limit and signal-to-noise ratio, wave-length coverage, number of filters and their shapes and observed galaxy type. We use simulated galaxy catalogs constructed to reproduce observed galaxy lumi...
متن کاملOptical Cluster-Finding with An Adaptive Matched-Filter Technique: Algorithm and Comparison with Simulations
We present a modified adaptive matched filter algorithm designed to identify clusters of galaxies in wide-field imaging surveys such as the Sloan Digital Sky Survey. The cluster-finding technique is fully adaptive to imaging surveys with spectroscopic coverage, multicolor photometric redshifts, no redshift information at all, and any combination of these within one survey. It works with high ef...
متن کاملThe 1.6μm Bump as a Photometric Redshift Indicator
I describe the principle of using the 1.6μm H spectral feature as a photometric redshift indicator and demonstrate that the technique holds promise by successfully recovering the redshifts of a small sample of z=0–1 galaxies using only their infrared (JHKL) photometry. I then consider the applicability of the technique to the 3.6–8μm SIRTF filter set and investigate the systematic errors that c...
متن کاملCreating Spectral Templates from Multicolor Redshift Surveys
We present a novel method capable of creating optimal eigenspectra from multicolor redshift surveys for photometric redshift estimation. Our iterative training algorithm modifies the templates to represent the photometric measurements better. We present a short description of our algorithm here. We show that the corrected templates give more precise photometric redshifts, essentially a “free” f...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2001