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1061. Unsupervised Catalog Classification
... Automatic classification of large catalogs may be carried out for survey objectives, or to elucidate the catalog's contents in a minimally-restricted way. ... 1992; Murtagh & Hern?ndez-Pajares 1994; Hern?ndez-Pajares et al. 1994): each item in a multidimensional input data set is assigned to a cluster center; the cluster centers are themselves ordered by their proximities; and the cluster centers are arranged in some specific output representational structure, often a regularly-spaced grid. ... 1994...
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Ссылки http://www.adass.org/adass/proceedings/adass94/murtaghf1.html -- 14.6 Кб -- 03.11.2000
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1062. Object Detection Using Multi-Resolution Analysis
... Next: Unsupervised Catalog Classification Up: Object Detection and Previous: Classification of Objects . ... Multi-resolution allows for image analysis in terms of different scales. ... This approach is used for the detection (and subsequent analysis) of globular cluster systems around elliptical galaxies, and for image characterization and object trawling in large image databases. ... The applicability of this approach to object detection in large image collections has been investigated. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/murtaghf2.html -- 11.9 Кб -- 03.11.2000
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1063. Simulations of Pinhole Imaging for AXAF: Distributed Processing Using the MPI
... The pinhole simulation program is a computationally and memory intensive task. ... A parallel version was developed instead, to enable distributed processing on a cluster of workstations. The program makes use of the Message Passing Interface (MPI) standard for parallel processing, implemented as an API (Application Programming Interface) to the Local Area Multicomputer (LAM) programming environment developed at the Ohio Supercomputer Center. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/nguyend.html -- 11.5 Кб -- 03.11.2000
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1064. Interactive Fitting of EUVE Emission Line Spectra
... An interactive IRAF task for the analysis of Extreme Ultraviolet Explorer ( EUVE ) emission line spectra is presented. The line flux in extracted spectra may be measured by multiple techniques, including fitting individual lines. ... To aid in identifying lines, the positions of known lines may be marked on the spectrum during the fitting process. Also, model EUVE spectra may be constructed and overlaid using plasma emissivities and source emission measures supplied by the user. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/abbottm.html -- 8.6 Кб -- 03.11.2000
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1065. CCDs at ESO: A Systematic Testing Program
... We describe a systematic, regular testing program for CCDs which is now being applied at La Silla. ... The test are integrated in the CCD reduction package of the Munich Image Data Analysis System (ESO-MIDAS). ... To that end, we have instigated a systematic program of standard CCD tests at ESO, La Silla. ... The test program has been integrated in the CCD reduction package of the Munich Data Analysis System (ESO-MIDAS) (ESO 1993), and will be available in the 94NOV release. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/abbottt.html -- 13.5 Кб -- 03.11.2000
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1066. ADS Abstract Service Enhancements
... The Astrophysics Data System is enhancing functionality and access to the Abstract Service in several areas. A new WAIS server running the freeWAIS search engine has been added to the existing HTTP and ANSA-based servers. ... The Astrophysics Science Information and Abstract Service (ASIAS) of the Astrophysics Data System (ADS), formerly known as ``Abstract Service,'' has been very successful in providing the researcher and librarian the capability to search the astronomical literature. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/accomazzia.html -- 14.9 Кб -- 03.11.2000
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1067. On the Combination of Undersampled Multiframes
... In order to overcome undersampling, two or more frames of the same field may be obtained which are shifted with respect to each other by fractions of a pixel. ... Obviously science programs such as photometry of dense star fields and the morphological classification of distant galaxies would benefit from a method allowing a proper combination of two or more ``dithered'' WFPC-2 frames, i.e., frames that are shifted with respect to each other by fractions of a pixel. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/adorfhm1.html -- 13.1 Кб -- 03.11.2000
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1068. Interpolation of Irregularly Sampled Data Series---A Survey
... Many astronomical observations, including spectra and time series, consist of irregularly sampled data series, the analysis of which is more complicated than that of regularly spaced data sets. ... This contribution surveys the methods used in astronomy for the interpolation of irregularly sampled one-dimensional data series. ... This method (Scargle 1989) is applicable to data with arbitrary sampling. ... This method is applicable to a regularly sampled data series with missing data. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/adorfhm2.html -- 13.6 Кб -- 03.11.2000
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1069. ADASS IX Index
Next: Software Development and Management . Up: Preface . Previous: Colophon . Table of Contents - Subject Index - Author Index - . Astronomical Data Analysis Software and Systems IX . ASP Conference Series, Vol. 216, 2000 . Editors: N. Manset, C. Veillet, D. Crabtree . Author Index . Subject Index . Copyright 2000 Astronomical Society of the Pacific , 390 Ashton Avenue, San Francisco, California 94112, USA . adass@cfht.hawaii.edu
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Ссылки http://www.adass.org/adass/proceedings/adass99/Index.html -- 3.1 Кб -- 18.10.2000
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1070. Data Analysis Tools, Techniques, and Software
Table of Contents - Subject Index - Author Index - . Astronomical Data Analysis Software and Systems IX . ... 216, 2000 . ... Object Classification as a Data Analysis Tool . ... The Earth Occultation Technique with the Burst and Transient Source Experiment . ... ISIS: An Interactive Spectral Interpretation System for High Resolution X-Ray Spectroscopy . ... CIA V4.0 -- News about Data Analysis with the ISOCAM Interactive Analysis System . ... Elements of The Chandra Data Analysis System . ...
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Ссылки http://www.adass.org/adass/proceedings/adass99/Analysis.html -- 6.1 Кб -- 13.10.2000
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1071. User Interfaces, Visualization, Data Acquisition and Reduction
Table of Contents - Subject Index - Author Index - . Astronomical Data Analysis Software and Systems IX . ... Graphical User Interface for an Observing Control System for the UK Infrared Telescope . ... The Data Inspector: Data Visualization for the Chandra Monitoring Project 10mm} . ... I/O Performance of AIPS++ . ... SDImager: An Imaging Tool for Single Dish Observations in AIPS++ . ... The ACSIS Data Reduction System . ... Data Acquisition by Switching . ...
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Ссылки http://www.adass.org/adass/proceedings/adass99/User.html -- 5.2 Кб -- 13.10.2000
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1072. TwoFitlines: An Spectrum and Line Analysis Tool
Next: A New IRAF Catalog Access Tool for Astrometry . Up: Iraf Packages . ... Twofitlines is a tool developed within IRAF, optimized to be used with data containing multiple spectra along the spatial axis of the detector. A given spectral feature can be decomposed in one or several Gaussian components. ... A given spectral feature can be modeled using one or more components (currently only Gaussian profiles are available), . ... Close spectral features could be modeled simultaneously. ...
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Ссылки http://www.adass.org/adass/proceedings/adass99/P2-36/ -- 12.0 Кб -- 12.10.2000
[ Сохраненная копия ] Ссылки http://www.adass.org/adass/proceedings/adass99/P2-36/P2-36.html -- 12.0 Кб -- 12.10.2000
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1073. A Spectroscopy Exposure Time Calculator for IRAF
... Up: Iraf Packages . ... IRAF Group, NOAO 1 , PO Box 26732, Tucson, AZ 85726 . This paper describes a new IRAF spectroscopy exposure time calculator. ... SPTIME takes an input source spectrum, either a reference blackbody, power law, or a user spectrum, a background ``sky'', observing parameters such as exposure time, central wavelength, seeing, airmass, and moon phase, instrument parameters such as aperture sizes and detector binning, a description of the spectrograph, and desired output. ...
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Ссылки http://www.adass.org/adass/proceedings/adass99/P1-45/ -- 10.7 Кб -- 12.10.2000
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[ Сохраненная копия ] Ссылки http://www.adass.org/adass/proceedings/adass99/P1-45/index.html -- 10.7 Кб -- 12.10.2000
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[ Сохраненная копия ] Ссылки http://www.adass.org/adass/proceedings/adass99/P1-45/index.html -- 10.7 Кб -- 12.10.2000
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1074. An Automatic Astronomical Classifier Based on Topological Neural Networks
... Up: Data Analysis Tools, Techniques, and Software . ... We report progress in the development of an automatic classifier for astronomical objects. ... One of the solution may lie in the use of neural networks (NN). ... We will at first expose the foundations of SOM in order to present our Topological Neural Networks (TNN) that gives us our first good results of classification. ... Figure 2: Left: Configuration of a Topological Neural Network, Right: The Topological Map after training. ...
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Ссылки http://www.adass.org/adass/proceedings/adass99/P3-09/ -- 16.1 Кб -- 12.10.2000
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1075. CIA V4.0 -- News about Data Analysis with the ISOCAM Interactive Analysis...
Next: Elements of The Chandra Data Analysis System . ... The ISOCAM Interactive Analysis System (CIA) (Ott et al. ... Starting mid 1994, the ISOCAM Interactive Analysis System (CIA) 54 was developed to support the calibration and operation of ISOCAM, the infrared camera on board of ESA's Infrared Space Observatory (ISO) 55 . ... CIA V4.0 is Y2K compliant, . ... 1997, Design and Implementation of CIA, the ISOCAM Interactive Analysis System, in ASP Conf. ... CEA, Saclay, Gif-sur-Yvette, France .. ...
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Ссылки http://www.adass.org/adass/proceedings/adass99/P2-50/ -- 24.9 Кб -- 12.10.2000
[ Сохраненная копия ] Ссылки http://www.adass.org/adass/proceedings/adass99/P2-50/P2-50.html -- 24.9 Кб -- 12.10.2000
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1076. Data Acquisition by Switching
Next: Data and Image Processing . ... The EKH method is then a division in the Fourier plane by this sine function, which is equivalent to a convolution in the image plane by the Fourier transform of this cosec function (an infinite set of delta functions separated by the beam throw, positive on one side of the origin and negative on the other). ... Figure 1: EKH restoration of simulated data: image plane (left), Fourier plane (right) illustrating EKH sine-wave pattern of noise. ...
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Ссылки http://www.adass.org/adass/proceedings/adass99/P2-43/ -- 15.2 Кб -- 12.10.2000
[ Сохраненная копия ] Ссылки http://www.adass.org/adass/proceedings/adass99/P2-43/P2-43.html -- 15.2 Кб -- 12.10.2000
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[ Сохраненная копия ] Ссылки http://www.adass.org/adass/proceedings/adass99/P2-43/P2-43.html -- 15.2 Кб -- 12.10.2000
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1077. The Communication of Images from New Generation Astronomical Telescopes
... Up: Future Instruments and Telescopes, Tools . ... New Generation Astronomical Telescopes (NGAT), a class of telescopes designed to be operated remotely and robotically, require efficient methods for communicating images over heterogeneous and low-bandwidth data networks such as the Internet. ... Methods researched thus far involve the classification of astronomical images based on object parameterisation, progressive image transmission, and evaluation of existing image compression schemes. ...
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Ссылки http://www.adass.org/adass/proceedings/adass99/P1-30/ -- 11.5 Кб -- 12.10.2000
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1078. Toolkit Based Extension of the SDSS Control System
... The capabilities of the Sloan Digital Sky Survey (Gunn et al. 1999) telescope control system have been enhanced by selective integration with components of the Experimental Physics and Industrial Control System (EPICS) toolkit. ... Given the problem of how to examine the data we proposed a utilization of the standard Experimental Physics and Industrial Control System (EPICS) toolkit to provide graphical interfaces to both archived data and to network-based access of real-time TPM channels. ...
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Ссылки http://www.adass.org/adass/proceedings/adass99/P1-06/ -- 11.9 Кб -- 12.10.2000
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1079. Keck Telescope Control System
... Up: Telescope and Instrument Control Systems . ... The two 10m Keck telescopes run identical control systems, implemented using the Experimental Physics and Industrial Control System (EPICS). ... First of all, KTL is introduced, using the telescope control system as an example and illustrating how it was possible to move from the old pre-EPICS Keck 1 control system to the new EPICS control system with hardly any changes to the KTL keyword interface. ... Keywords are not used for large data arrays. ...
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Ссылки http://www.adass.org/adass/proceedings/adass99/O8-02/ -- 26.4 Кб -- 12.10.2000
[ Сохраненная копия ] Ссылки http://www.adass.org/adass/proceedings/adass99/O8-02/O8-02.html -- 26.4 Кб -- 12.10.2000
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1080. VERDI: A Web Database System for Redshift Surveys
... Up: Distributed Data Systems, Data Mining . Previous: SIMBAD as a Test Bed for two Object Oriented Database Management Systems: Objectivity/DB and O2 . ... The Victoria Explorer for Redshift Databases on the Internet (VERDI) is a Web-based data retrieval system which allows users to access tabular data, images, and spectra of astronomical objects and to perform queries on the underlying database. ... As the CNOC2 Field Galaxy Redshift Survey neared completion in 1998, we had a problem. ...
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Ссылки http://www.adass.org/adass/proceedings/adass99/P1-16/ -- 13.2 Кб -- 12.10.2000
[ Сохраненная копия ] Ссылки http://www.adass.org/adass/proceedings/adass99/P1-16/P1-16.html -- 13.2 Кб -- 12.10.2000
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[ Сохраненная копия ] Ссылки http://www.adass.org/adass/proceedings/adass99/P1-16/P1-16.html -- 13.2 Кб -- 12.10.2000
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