1,023 research outputs found
Easylife: the data reduction and survey handling system for VIPERS
We present Easylife, the software environment developed within the framework
of the VIPERS project for automatic data reduction and survey handling.
Easylife is a comprehensive system to automatically reduce spectroscopic data,
to monitor the survey advancement at all stages, to distribute data within the
collaboration and to release data to the whole community. It is based on the
OPTICON founded project FASE, and inherits the FASE capabilities of modularity
and scalability. After describing the software architecture, the main reduction
and quality control features and the main services made available, we show its
performance in terms of reliability of results. We also show how it can be
ported to other projects having different characteristics.Comment: pre-print, 17 pages, 4 figures, accepted for publication in
Publications of the Astronomical Society of the Pacifi
Visualization, Exploration and Data Analysis of Complex Astrophysical Data
In this paper we show how advanced visualization tools can help the
researcher in investigating and extracting information from data. The focus is
on VisIVO, a novel open source graphics application, which blends high
performance multidimensional visualization techniques and up-to-date
technologies to cooperate with other applications and to access remote,
distributed data archives. VisIVO supports the standards defined by the
International Virtual Observatory Alliance in order to make it interoperable
with VO data repositories. The paper describes the basic technical details and
features of the software and it dedicates a large section to show how VisIVO
can be used in several scientific cases.Comment: 32 pages, 15 figures, accepted by PAS
EZ: A Tool for Automatic Redshift Measurement
We present EZ (Easy redshift), a tool we have developed within the VVDS
project to help in redshift measurement from otpical spectra. EZ has been
designed with large spectroscopic surveys in mind, and in its development
particular care has been given to the reliability of the results obtained in an
automatic and unsupervised mode. Nevertheless, the possibility of running it
interactively has been preserved, and a graphical user interface for results
inspection has been designed. EZ has been successfully used within the VVDS
project, as well as the zCosmos one. In this paper we describe its architecture
and the algorithms used, and evaluate its performances both on simulated and
real data. EZ is an open source program, freely downloadable from
http://cosmos.iasf-milano.inaf.it/pandora.Comment: accepted for publication in Publications of the Astronomical Society
of the Pacifi
An H Catalogue of Galaxies in Hickson Compact Groups. I. The Sample
We present H photometry for a sample of 95 galaxies in Hickson
Compact Groups obtained from observations of 31 groups. The Catalogue lists
isophotal and adaptive aperture (Kron aperture) flux measurements for about 75%
of the accordant galaxies inside the observed HCGs, 22 out of which are upper
limits. Non standard data reduction procedures have been used to obtain the
continuum subtracted H images for each HCG of the target sample. Flux
calibration has also been performed in order to obtain H luminosities
for the whole sample. Both the data reduction and calibration procedures are
carefully described in this paper. The new data listed in this Catalogue are of
great importance in understanding the star formation rate inside HCG galaxies
and in giving new insights on its dependence on galaxy interactions.Comment: Accepted for publication in A&AS, 22 pages, including 23 figure
Data Reduction and Analysis Graphical Organizer
Spectroscopic surveys are undergoing a rapid expansion in their data
collecting capabilities, reaching the level of hundreds of spectra per
pointing. An efficient use of such huge amounts of information requires a high
degree of interconnection between the various tools involved in preparing the
observations, reducing the data, and carrying out the data analysis. DRAGO
(Data Reduction and Analysis Graphical Organizer) attempts to easy the process,
by integrating in a global framework the main data handling components: from
reduction pipelines, to data organization, plotting, and browsing tools, to
storing the data reduction results in a database for further analysis. DRAGO
allows the use of the astronomer own's preferred tools, by "plugging them in"
in an environment which handles transparently the communications between them.
See http://cosmos.mi.iasf.cnr.it/pandora .Comment: 6 pages, 9 figures, ADA III conference proceedin
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