Article (Scientific journals)
Redshift determination through weighted phase correlation: a linearithmic implementation
Delchambre, Ludovic
2016In Monthly Notices of the Royal Astronomical Society, 460, p. 2811-2821
Peer Reviewed verified by ORBi
 

Files


Full Text
paper.pdf
Publisher postprint (884.19 kB)
Download
Annexes
wcorrQRL-master.zip
Publisher postprint (263.39 kB)
Source code
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
methods: data analysis; galaxies: distances and redshifts; quasars: general
Abstract :
[en] We present a new algorithm having a time complexity of O(N log N) and designed to retrieve the phase at which an input signal and a set of not necessarily orthogonal templates match at best in a weighted chi-squared sense. The proposed implementation is based on an orthogonalization algorithm and thus also benefits from a high numerical stability. We successfully apply this method to the redshift determination of quasars from the twelfth Sloan Digital Sky Survey (SDSS) quasar catalog and derive the proper spectral reduction and redshift selection methods. Also provided are the derivations of the redshift uncertainty and of the associated confidence. Results of this application are comparable to the performances of the SDSS pipeline while not having a quadratic time dependency.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Delchambre, Ludovic  ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Language :
English
Title :
Redshift determination through weighted phase correlation: a linearithmic implementation
Publication date :
2016
Journal title :
Monthly Notices of the Royal Astronomical Society
ISSN :
0035-8711
eISSN :
1365-2966
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
460
Pages :
2811-2821
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 January 2017

Statistics


Number of views
40 (2 by ULiège)
Number of downloads
119 (0 by ULiège)

Scopus citations®
 
3
Scopus citations®
without self-citations
1
OpenCitations
 
1

Bibliography


Similar publications



Contact ORBi