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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/27049
Title: The VIMOS Public Extragalactic Redshift Survey (VIPERS). PCA-based automatic cleaning and reconstruction of survey spectra
Authors: Marchetti, A.
GARILLI, BIANCA MARIA ROSA 
Granett, B. R.
Guzzo, L.
IOVINO, Angela 
SCODEGGIO, MARCO 
BOLZONELLA, MICOL 
de la Torre, S.
ABBAS, Ummi 
Adami, C.
BOTTINI, DARIO 
CAPPI, Alberto 
CUCCIATI, Olga 
Davidzon, I.
FRANZETTI, PAOLO 
Fritz, A.
Krywult, J.
Le Brun, V.
Le Fèvre, O.
Maccagni, D.
Małek, K.
Marulli, F.
POLLETTA, MARIA DEL CARMEN 
Pollo, A.
Tasca, L. A. M.
Tojeiro, R.
VERGANI, DANIELA 
ZANICHELLI, Alessandra 
Arnouts, S.
Bel, J.
Branchini, E.
Coupon, J.
DE LUCIA, GABRIELLA 
Ilbert, O.
Moutard, T.
Moscardini, L.
Zamorani, G.
Issue Date: 2017
Journal: ASTRONOMY & ASTROPHYSICS 
Number: 600
First Page: A54
Abstract: Context. Identifying spurious reduction artefacts in galaxy spectra is a challenge for large surveys. <BR /> Aims: We present an algorithm for identifying and repairing spurious residual features in sky-subtracted galaxy spectra by using data from the VIMOS Public Extragalactic Redshift Survey (VIPERS) as a test case. <BR /> Methods: The algorithm uses principal component analysis (PCA) applied to the galaxy spectra in the observed frame to identify sky line residuals imprinted at characteristic wavelengths. We further model the galaxy spectra in the rest-frame using PCA to estimate the most probable continuum in the corrupted spectral regions, which are then repaired. <BR /> Results: We apply the method to 90 000 spectra from the VIPERS survey and compare the results with a subset for which careful editing was performed by hand. We find that the automatic technique reproduces the time-consuming manual cleaning in a uniform and objective manner across a large data sample. The mask data products produced in this work are released together with the VIPERS second public data release (PDR-2). <P />based on observations collected at the European Southern Observatory, Cerro Paranal, Chile, using the Very Large Telescope under programs 182.A-0886 and partly 070.A-9007. Also based on observations obtained with MegaPrime/MegaCam, a joint project of CFHT and CEA/DAPNIA at the Canada-France-Hawaii Telescope (CFHT), that is operated by the National Research Council (NRC) of Canada, the Institut National des Sciences de l'Univers of the Centre National de la Recherche Scientifique (CNRS) of France, and the University of Hawaii. This work is based in part on data products produced at TERAPIX and the Canadian Astronomy Data Centre as part of the Canada-France-Hawaii Telescope Legacy Survey, which is a collaborative project of NRC and CNRS. The VIPERS web site is <A href="http://www.vipers.inaf.it/">http://www.vipers.inaf.it/
URI: http://hdl.handle.net/20.500.12386/27049
URL: https://www.aanda.org/articles/aa/abs/2017/04/aa30249-16/aa30249-16.html
ISSN: 0004-6361
DOI: 10.1051/0004-6361/201630249
Bibcode ADS: 2017A&A...600A..54M
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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