The Infrared Medium-Deep Survey. V. A New Selection Strategy for Quasars
at z > 5 based on Medium-Band Observation with SQUEAN
Y. Jeon, M. Im, S. Pak, M. Hyun, S. Kim, Y. Kim, H. Lee, and W. Park. (2016)cite arxiv:1602.02236Comment: 12 pages, 10 figures, 4 tables, accepted for publication in Journal of the Korean Astronomical Society.
Abstract
Multiple color selection techniques have been successful in identifying
quasars from wide-field broad-band imaging survey data. Among the quasars that
have been discovered so far, however, there is a redshift gap at $5 łesssim
z 5.7$ due to the limitations of filter sets in previous
studies. In this work, we present a new selection technique of high redshift
quasars using a sequence of medium-band filters: nine filters with central
wavelengths from 625 to 1025 nm and bandwidths of 50 nm. Photometry with these
medium-bands traces the spectral energy distribution (SED) of a source, similar
to spectroscopy with resolution R $\sim$ 15. By conducting medium-band
observations of high redshift quasars at 4.7 $łeq$ z $łeq$ 6.0 and brown
dwarfs (the main contaminants in high redshift quasar selection) using the SED
camera for QUasars in EArly uNiverse (SQUEAN) on the 2.1-m telescope at the
McDonald Observatory, we show that these medium-band filters are superior to
multi-color broad-band color section in separating high redshift quasars from
brown dwarfs. In addition, we show that redshifts of high redshift quasars can
be determined to an accuracy of $\Deltaz/(1+z) = 0.002$ -- $0.026$.
The selection technique can be extended to z $\sim$ 7, suggesting that the
medium-band observation can be powerful in identifying quasars even at the
re-ionization epoch.
Description
[1602.02236] The Infrared Medium-Deep Survey. V. A New Selection Strategy for Quasars at z > 5 based on Medium-Band Observation with SQUEAN
%0 Generic
%1 jeon2016infrared
%A Jeon, Yiseul
%A Im, Myungshin
%A Pak, Soojong
%A Hyun, Minhee
%A Kim, Sanghyuk
%A Kim, Yongjung
%A Lee, Hye-In
%A Park, Woojin
%D 2016
%K high-z qso selection
%T The Infrared Medium-Deep Survey. V. A New Selection Strategy for Quasars
at z > 5 based on Medium-Band Observation with SQUEAN
%U http://arxiv.org/abs/1602.02236
%X Multiple color selection techniques have been successful in identifying
quasars from wide-field broad-band imaging survey data. Among the quasars that
have been discovered so far, however, there is a redshift gap at $5 łesssim
z 5.7$ due to the limitations of filter sets in previous
studies. In this work, we present a new selection technique of high redshift
quasars using a sequence of medium-band filters: nine filters with central
wavelengths from 625 to 1025 nm and bandwidths of 50 nm. Photometry with these
medium-bands traces the spectral energy distribution (SED) of a source, similar
to spectroscopy with resolution R $\sim$ 15. By conducting medium-band
observations of high redshift quasars at 4.7 $łeq$ z $łeq$ 6.0 and brown
dwarfs (the main contaminants in high redshift quasar selection) using the SED
camera for QUasars in EArly uNiverse (SQUEAN) on the 2.1-m telescope at the
McDonald Observatory, we show that these medium-band filters are superior to
multi-color broad-band color section in separating high redshift quasars from
brown dwarfs. In addition, we show that redshifts of high redshift quasars can
be determined to an accuracy of $\Deltaz/(1+z) = 0.002$ -- $0.026$.
The selection technique can be extended to z $\sim$ 7, suggesting that the
medium-band observation can be powerful in identifying quasars even at the
re-ionization epoch.
@misc{jeon2016infrared,
abstract = {Multiple color selection techniques have been successful in identifying
quasars from wide-field broad-band imaging survey data. Among the quasars that
have been discovered so far, however, there is a redshift gap at $5 \lesssim
{\rm z} \lesssim 5.7$ due to the limitations of filter sets in previous
studies. In this work, we present a new selection technique of high redshift
quasars using a sequence of medium-band filters: nine filters with central
wavelengths from 625 to 1025 nm and bandwidths of 50 nm. Photometry with these
medium-bands traces the spectral energy distribution (SED) of a source, similar
to spectroscopy with resolution R $\sim$ 15. By conducting medium-band
observations of high redshift quasars at 4.7 $\leq$ z $\leq$ 6.0 and brown
dwarfs (the main contaminants in high redshift quasar selection) using the SED
camera for QUasars in EArly uNiverse (SQUEAN) on the 2.1-m telescope at the
McDonald Observatory, we show that these medium-band filters are superior to
multi-color broad-band color section in separating high redshift quasars from
brown dwarfs. In addition, we show that redshifts of high redshift quasars can
be determined to an accuracy of $\Delta{\rm z}/(1+{\rm z}) = 0.002$ -- $0.026$.
The selection technique can be extended to z $\sim$ 7, suggesting that the
medium-band observation can be powerful in identifying quasars even at the
re-ionization epoch.},
added-at = {2016-02-09T09:50:57.000+0100},
author = {Jeon, Yiseul and Im, Myungshin and Pak, Soojong and Hyun, Minhee and Kim, Sanghyuk and Kim, Yongjung and Lee, Hye-In and Park, Woojin},
biburl = {https://www.bibsonomy.org/bibtex/2d239f03452c52e5447d44df15212300a/miki},
description = {[1602.02236] The Infrared Medium-Deep Survey. V. A New Selection Strategy for Quasars at z > 5 based on Medium-Band Observation with SQUEAN},
interhash = {6c78f4259596f093a7ce28ccd15d8fdc},
intrahash = {d239f03452c52e5447d44df15212300a},
keywords = {high-z qso selection},
note = {cite arxiv:1602.02236Comment: 12 pages, 10 figures, 4 tables, accepted for publication in Journal of the Korean Astronomical Society},
timestamp = {2016-02-09T09:50:57.000+0100},
title = {The Infrared Medium-Deep Survey. V. A New Selection Strategy for Quasars
at z > 5 based on Medium-Band Observation with SQUEAN},
url = {http://arxiv.org/abs/1602.02236},
year = 2016
}