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1621. Multiple World Coordinate Systems for DEIMOS Mosaic Images
Next: WCSTools: Image World Coordinate System Utilities . ... Up: FITS-Flexible Image Transport System . ... The Deep Extra-galactic Imaging Multi-Object Spectrograph (DEIMOS) under construction for Keck II will employ a detector comprised of a mosaic of eight CCDs. World coordinate system (WCS) information is needed for mapping between FITS pixels and many other systems. ... As an alternative, we store the bulk of the WCS information in a separate FITS table associated with the image HDUs. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/allens.html -- 12.7 Кб -- 23.06.1998
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1622. Algorithms
... A Computer-Based Technique for Automatic Description and Classification of Newly-Observed Data . ... Unified Survey of Fourier Synthesis Methodologies . ... Determination of Variable Time Delay in Uneven Data Sets . ... A New Stable Method for Long-Time Integration in an N-Body Problem . ... Imaging by an Optimizing Method . ... Non-parametric Algorithms in Data Reduction at RATAN-600 . ... Copyright 1997 Astronomical Society of the Pacific , 390 Ashton Avenue, San Francisco, California 94112, USA ....
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Ссылки http://www.adass.org/adass/proceedings/adass96/algorithms.html -- 4.3 Кб -- 23.06.1998
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1623. NICMOS Related Software Development at the ST-ECF
... In collaboration with the STScI and with the NICMOS Investigation Definition Team we have been developing software to predict aspects of NICMOS performance and to analyze NICMOS grism data. Quick look analysis software has been developed to extract spectra from NICMOS grism images and matching direct images to support ground testing and in-orbit verification. ... Software is being developed at the STScI to ensure the proper calibration of data obtained with NICMOS. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/albrechtr.html -- 14.0 Кб -- 23.06.1998
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1624. Access to Data Sources and the ESO SkyCat Tool
... Canadian Astronomy Data Center, DAO/NRC . SkyCat is a tool that combines image visualization with access to astronomical catalogs and data archives. SkyCat uses a standardized URL syntax to access a large number of data sources on the net. ... More information on SkyCat can be found at the SkyCat Web site. The ESO SkyCat Tool includes the following features: . ... PostScript color printing of the display (image + graphics), . ... overlay catalog sources on an image, . ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/albrechtm.html -- 9.9 Кб -- 23.06.1998
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1625. ADASS VI Author Index
Next: Subject Index . Up: Index . ... Abney, F., 294 . ... Acosta-Pulido, J., 108 , 112 . Adorf, H.-M., 443 . ... Albrecht, R., 104 , 290 , 443 . ... Bennett, C. L., 198 . ... Bex, G., 345 . ... Boller, T. H., 314 . ... Boxhoorn, D. R., 345 . ... Brunner, H. E., 314 . ... Caulet, A., 443 . ... Corcoran, M. F., 314 . ... Crutcher, R. M., 120 , 341 . ... Donahue, M., 294 . ... Englhauser, J. K., 314 . ... Folk, M., 341 . Fosbury, R. A. E., 443 . ... Freudling, W., 443 . ... Goscha, D., 341 . ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/aindex.html -- 21.5 Кб -- 23.06.1998
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1626. Image Reconstruction with Few Strip-Integrated Projections: Enhancements by
... Up: Algorithms . ... Iterative algorithms with non-linear constraints are very attractive in image reconstruction with only a few strip-integrated projections. We present research into various versions of the iterative CLEAN algorithm for the solution of this problem. ... where is the object brightness distribution, is the fan (dirty) beam, and is the dirty (summary) image. ... We carried out the study of TC-CLEAN applied to image reconstruction with few projections. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/agafonovm.html -- 14.4 Кб -- 23.06.1998
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1627. Astronomical Information Discovery and Access: Design and Implementation of the
Next: The Sociology of Astronomical Publication Using ADS and ADAMS . ... The approach followed in designing the ADS system is offered as a paradigm for building flexible networked information and discovery systems. ... The design behind the Astrophysics Data System (ADS) bibliographic databases was mainly dictated by the desire for a powerful and discipline-oriented system featuring sophisticated search capabilities. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/accomazzia.html -- 14.7 Кб -- 23.06.1998
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1628. ETOOLS: Tools for Photon Event Data
... Table of Contents - Index - PS reprint - PDF reprint . ... Our primary goal is to provide a set of generic tools for the basic manipulation of event data. ... The data are stored in basic objects such as images and tables, which provide appropriate manipulations (e.g., filtering of tables, sectioning of images). ... For example, a ``filter'' object contains the time intervals to be used to filter a table of events, and is persistently associated with the event table. ... Table. ... Interval Filter. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/abbottm.html -- 13.1 Кб -- 23.06.1998
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1629. Packaging Radio/Sub-millimeter Spectral Data in FITS
... We report on an experiment to incorporate the multiple extension FITS file format in building data processing software for spectroscopic observations in radio and millimeter-submillimeter wavelengths. By packaging spectral header information into table extensions and the actual spectral data into either table or image extensions, this approach provides a convenient and effective way to organize large amount of spectroscopic data, especially for pipeline-like processing tasks. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/wangz.html -- 13.1 Кб -- 15.05.1998
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1630. World Coordinate Systems as Objects
... We describe a new library (AST) which provides a flexible high-level programming interface for handling world coordinate systems in astronomy and for producing graphical output. ... Relationships between coordinate systems are represented within AST by objects called Mappings. ... While Mappings represent the relationships between coordinate systems, the coordinate systems themselves are represented by objects called Frames. ... Like all objects, a Frame also provides methods. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/warrensmithr.html -- 13.5 Кб -- 15.05.1998
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1631. The IDL Wavelet Workbench
... Progress in the development of the 1996 release of the IDL Wavelet Workbench (WWB) is shown. The WWB is now improved in several ways, among them are: (1) a smarter GUI which easily directs the user to the possibilities of the WWB, (2) the inclusion of more wavelets, (3) the enhancement of the input and output modules to provide a better interface to the input and output data and (4) the addition of more analysis methods based on the wavelet transform. ... More analysis routines are now available. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/wergerm.html -- 8.4 Кб -- 15.05.1998
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1632. Methods for Structuring and Searching Very Large Catalogs
... Some existing (e.g., USNO-A1.0) and most of the upcoming catalogs (e.g., GSC-II SDSS , GAIA ) contain data for half a billion up to several billion objects. ... Here we present methods for structuring and searching very large catalogs to provide fast access to the coordinate domain of the parameter space. ... By generalising such methods it is also possible to produce catalog structures and indexes for accessing a multi dimensional parameter space. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/wiceneca.html -- 12.5 Кб -- 15.05.1998
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1633. The Interaction of the ISO-SWS Pipeline Software and the ISO-SWS Interactive
... Previous: Data Analysis with ISOCAM Interactive Analysis System -- Preparing for the Future . ... We describe the ISO SWS Pipeline software and ISO SWS Interactive Analysis system ( IA 3 ) on different hardware platforms. ... IA 3 has been developed to fulfill tasks like debugging of pipeline software, monitoring and improve instrument performance and related software, as well for scientific analysis of SWS data. ... Analyse the performance of SWS. ... Now it is THE SWS data analysis software. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/wieprechte.html -- 16.7 Кб -- 15.05.1998
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1634. ADASS VII Index
... Table of Contents -- Index . Author Index . Subject Index . Enter words for search: . This is a WAIS search of the entire contents of all the articles, performed by the wwwwais gateway program. ... You may use "and" and "or" in a search. For example, compare the results of a search for "midas and aips" to the results of searching for "midas" alone. Copyright 1998 Astronomical Society of the Pacific , 390 Ashton Avenue, San Francisco, California 94112, USA . ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/windex.html -- 2.6 Кб -- 15.05.1998
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1635. Substepping and its Application to HST Imaging
... The substepping technique is used for the Hubble Space Telescope (HST) imaging to cope with the problem of undersampling and to improve resolution. ... For the HST, undersampling means that the size of the pixel in a camera is larger than the critical value determined by the optics of the telescope, and aliasing takes place. ... Sampling is an operation to integrate a ( x ) within a pixel, and to assign the result to this pixel (Figure 1 A). ... Figure 1: Substepping ( N =2) and normal sampling. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/wun.html -- 14.1 Кб -- 15.05.1998
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1636. IRAF Multiple Extensions FITS (MEF) Files Interface
... The Multiple Extension FITS (MEF) file interface is an IRAF library providing facilities for general file operations upon FITS multi-extension files. ... The Multiple Extensions FITS (MEF) interface consists of a number of routines to mainly read a FITS Primary Data Unit or an Extension Unit and manipulate the data at a file level. ... Read the FITS header of a MEF file that matches the EXTNAME or EXTVER keyword values or if not specified, read the extension number `group'. ... The header filename. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/zaraten.html -- 12.2 Кб -- 15.05.1998
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1637. The Co-Addition Technique Applied to Images of Galaxy Cores
... Previous: Substepping and its Application to HST Imaging . ... This is a preliminary report on an application of the co-addition technique based upon the Richardson-Lucy algorithm. The combination of high signal-to-noise ground-based images obtained with the ESO NTT using SUSI with high angular resolution HST FOC f/96 images gives new insights on the properties of galaxy cores and their potential time variability. Cores of galaxies are one of the main thrusts of present extragalactic research. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/zeilingerw.html -- 10.9 Кб -- 15.05.1998
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1638. The ASC Data Archive for the AXAF Ground Calibration
... Up: Archives and Information Services . Previous: The VizieR System for Accessing Astronomical Data . ... A data archive is near completion at the ASC to store and provide access to AXAF data. ... It consists of a number of different servers which handle flat data files, relational data, replication across multiple sites and the interface to the WWW. ... This paper presents the overall archive architecture and the design of client and server components as it was used during ground calibration. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/zografoup.html -- 11.6 Кб -- 15.05.1998
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1639. The ISO Post-Mission Archive
... Up: Archives and Information Services . ... It is performing astronomical observations at wavelengths from 2.4-240 microns with four instruments; a camera (2.5-18 microns), a photometer (2.5-240 microns), a short-wavelength spectrometer (2.4-45.2 microns) and a long-wavelength spectrometer (43-197 microns). ... The ISO post-mission archive (PMA) is being designed to fully exploit this legacy by providing access to the data across the Internet. ... For each observation the user specifies: . ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/saxtonr.html -- 10.7 Кб -- 15.05.1998
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1640. Cost-Effective System Management
Next: Other People's Software . ... Quality system management of computer workstations for astronomy can be achieved with relatively small manpower requirements, if the right cost-effective administrative design decisions are made. ... This is all done with essentially one system manager. ... The system is designed so that one doesn't depend on four or more hosts, (such as a software server, cpu server, data file server, font server, etc.) to get work done. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/schallers.html -- 9.4 Кб -- 15.05.1998
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