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1681. Astrobrowse: A Multi-site, Multi-wavelength Service for Locating Astronomical
... We report on the development of a Web agent which allows users to conveniently find information about specific objects or locations from astronomical resources on the World Wide Web. The HEASARC Astrobrowse agent takes a user-specified location and queries up to hundreds of resources on the Web to find information relevant to the given target or position. ... The types of resources the user can get include images, name resolution services, catalog queries or archive indices. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/mcglynnt.html -- 12.7 Кб -- 15.05.1998
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1682. Using Java for Astronomy: The Virtual Radio Interferometer Example
... Nuffield Radio Astronomy Laboratories, University of Manchester, Jodrell Bank, Macclesfield, Cheshire SK11 9DL, UK . ... We present the Virtual Radio Interferometer, a Java applet which allows the demonstration of earth-rotation aperture synthesis by simulating existing and imaginary telescopes. ... The use of the Java language is discussed, and the role of the language, within the astronomical software context, reviewed. ... The resulting program was called the Virtual Radio Interferometer (VRI). ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/mckayn.html -- 12.3 Кб -- 15.05.1998
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1683. Constructing and Reducing Sets of HST Observations Using Accurate Spacecraft
... A further spin off of this project is that more reliable pointing information for all exposures is provided. In 1995 the ST-ECF introduced, along with the CADC, the re-calibration on-the-fly (OTF) of archived HST exposures. ... By correlating the HST Mission Schedule and the time-tagged engineering telemetry data stream downloaded from HST it is possible to reconstruct with great accuracy the pointing sequence of any given scientific observation. ... taken within the same HST visit . ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/micola.html -- 13.4 Кб -- 15.05.1998
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1684. Hubble Space Telescope Telemetry Access using the Vision 2000 Control Center
... A Web browser with Java support and an account to establish a secure Internet HTTP connection to the Goddard Space Flight Center (GSFC), is everything needed in order to use the new Control Center System (CCS). Then full access to the telemetry of the Hubble Space Telescope (HST) is given (Figure 2). A public version of CCS is also available. ... Rifkin, A. 1997, Reengineering the Hubble Space Telescope Control Center System, Institute of Electrical and Electronics Engineers Inc. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/miebachm.html -- 9.3 Кб -- 15.05.1998
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1685. RVSAO 2.0 - A Radial Velocity Package for IRAF
... RVSAO 2.0 is the latest release of a package for calculating apparent radial velocities of celestial objects from observed spectral shifts. ... XCSAO cross-correlates the Fourier transform of an object's spectrum against the transforms of a set of template spectra with known spectral shifts to obtain a velocity and error. ... Full documentation of this software, including numerous examples of its use, is on-line at http://tdc-www.harvard.edu/iraf/rvsao/ . ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/minkd.html -- 13.6 Кб -- 15.05.1998
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1686. The Distributed Analysis System Hierarchy ( DASH ) for the SUBARU Telescope
... We are developing a data reduction and analysis system DASH (Distributed Analysis Software Hierarchy) for efficient data processing for the SUBARU telescope. ... Moreover, we introduced a data reduction procedure cube ( PROCube ) as a kind of visual procedure script. ... DASH is, therefore, designed as an observatory system for astronomical data reduction and analysis, which cooperates with the SUBARU observation software system and the data archival system. ... DASH aims at open architecture. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/mizumotoy.html -- 12.1 Кб -- 15.05.1998
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1687. Recognition of Anomalous Events
... Previous: A Posteriori Guidance for Astronomical Images . ... We present an original algorithm for the recognition of anomalous events in a CCD frame (i.e., cosmic hits, bad pixels etc.) The algorithm is able to distinguish between these events and real features by comparing the standard deviation and the kurtosis of a synthetic PSF, whose width is given by the user, and the corresponding values in a running window, whose size is chosen by the user, in the actual frame. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/monais.html -- 10.0 Кб -- 15.05.1998
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1688. Pipeline Processing and Quality Control for Echelle Data
... In the framework of a collaboration between ESO and OAT concerning the development of a data reduction pipeline and the related quality control subsystems software for UVES/VLT, a detailed feasibility study is being performed on the basis of data extracted from the EMMI/NTT archive. ... It is ESO policy to perform data reduction for VLT instruments in ``pipeline" mode, either at the observing premises or at headquarters. ... archive data were processed in pipeline mode; . ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/morganteg.html -- 12.6 Кб -- 15.05.1998
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1689. Noise Detection and Filtering using Multiresolution Transform Methods
... A new and powerful methodology for treating noise and clutter in astronomical images is described. ... trous wavelet transform, and the multiresolution support data structure. ... Figure 2: Top row: original noisy spectrum; filtered spectrum using the multiresolution support method; both superimposed. ... Figure 5 shows an image filtered by the wavelet transform (Starck and Pierre 1997a). ... Figure 5: ROSAT image of the cluster A2390 filtered by the method based on wavelet coefficients. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/murtaghf.html -- 18.9 Кб -- 15.05.1998
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1690. A Multidimensional Binary Search Tree for Star Catalog Correlations
... A multi-dimensional binary search tree, k-d tree, is proposed to support range queries in multi-key data sets. The algorithm can been used to solve a near neighbors problem for objects in a 19 million entries star catalog, and can be used to locate radio sources in cluster candidates for the X-ray/SZ Hubble constant measurement technique. ... The choices for the problem at hand were narrowed down to two : a Multidimensional k-ary Search Tree (MKST) and a k-dimensional (k-d) tree. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/nguyend.html -- 12.8 Кб -- 15.05.1998
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1691. An Archival System for Observational Data Obtained at the Okayama and Kiso
... Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Kamogata, Okayama 719-02, Japan . ... We present the newly developed version of the Mitaka-Okayama-Kiso data Archival system (MOKA3). MOKA3 consists of three parts: 1) a distributed database system which manages the observational data archive of Okayama and Kiso observatories, 2) a Web-based data search and request system, and 3) a delivery system for requested data. ... The data flow of MOKA3 is shown in Figure 1 . ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/nishiharae.html -- 12.3 Кб -- 15.05.1998
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1692. The VizieR System for Accessing Astronomical Data
... Table of Contents -- Index -- PS reprint -- PDF reprint . ... The recently reshaped VizieR system, a unified query interface to an increasing number of catalogs (presently ), is presented. ... Besides the adoption of this new protocol, the most visible changes in this new version of VizieR are an easy access to notes, and possibilities of navigation between the tables of a catalog. ... There are presently rows in this table, i.e. an average of tables per catalog. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/ochsenbeinf.html -- 16.6 Кб -- 15.05.1998
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1693. CDS GLU, a Tool for Managing Heterogeneous Distributed Web Services
Next: The CDS Information Hub . ... In this context, the CDS (Centre de Donn?es astronomiques de Strasbourg) has developed the GLU system (G?n?rateur de Liens Uniformes). This tool allows all managers participating in the system to describe and easily distribute the URL definitions required to access their databases. ... So, the GLU system is particularly adapted to design cooperative Web services, allowing one to generate links to other services which remains always up-to-date. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/ferniquep.html -- 10.7 Кб -- 15.05.1998
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1694. Object-Oriented Experiences with GBT Monitor and Control
Next: Realtime, Object-oriented Reduction of Parkes Multibeam Data using AIPS++ . ... The Green Bank Telescope Monitor and Control software group adopted object-oriented design techniques as implemented in C++. ... I should make clear from the outset that the Green Bank Telescope (GBT) monitor and control system is the work of a team of software designers of which I am not a principal member. ... The design method used for the GBT monitor and control is the ``Object Model'' in Rumbaugh et al. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/fisherj.html -- 20.6 Кб -- 15.05.1998
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1695. The IRAF Client Display Library (CDL)
... IRAF Group , NOAO , PO Box 26732, Tucson, AZ 85726 . The Client Display Library is a new interface that allows host (non-IRAF) C or FORTRAN programs to display images or draw into the graphics overlay using the XImtool image server and image viewers which emulate the XImtool client protocol such as SAOtng, SAOimage, and IPAC Skyview. ... Image cursor read/write . ... The CDL currently uses a modified IIS Model 70 protocol to communicate with IRAF display servers such as XImtool. ... IRAF.. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/fitzpatrickm.html -- 11.6 Кб -- 15.05.1998
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1696. News on the ISOPHOT Interactive Analysis PIA
... Up: Data Analysis Applications . ... The ISOPHOT Interactive Analysis system, a calibration and scientific analysis tool for the ISOPHOT instrument on board ESA's Infrared Space Observatory (ISO), has been further developed while ISO is in operation. ... The ISOPHOT Interactive Analysis (PIA) is an IDL based software tool developed for calibration and scientific analysis of data from ISOPHOT (Lemke et al. 1996), one of the instruments on board ISO (Kessler et al. 1996). ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/gabrielc.html -- 13.7 Кб -- 15.05.1998
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1697. The Phase II Language for the Hobby Eberly Telescope
... Hobby Eberly Telescope, RLM 15.308 University of Texas, Austin, TX 78712, Email: niall@astro.as.utexas.edu . ... We describe our recent software effort to enable queued observations on the Hobby Eberly Telescope. ... The Hobby Eberly Telescope (HET) (Sebring & Ramsey 1994) is a 9.2 meter optical telescope currently undergoing scientific commissioning in west Texas. ... Once fully operational, this telescope will operate in a queue scheduled, service observing mode 85% of the time. ... flux of object...
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Ссылки http://www.adass.org/adass/proceedings/adass97/gaffneyn.html -- 14.0 Кб -- 15.05.1998
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1698. Distributed Searching of Astronomical Databases with Pizazz
... Previous: Accessing Astronomical Data over the WWW using datOZ . ... Robust, distributed searching of networked-based astronomical databases requires an investment not only by individual data providers, but also by the astronomical community as a whole. ... Designing a distributed, networked-based astronomical information system requires a four-step approach including original data source analysis, modeling the system, profiling the system, and implementation of the system. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/gamielk.html -- 11.0 Кб -- 15.05.1998
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1699. The CDS Information Hub
... Previous: CDS GLU, a Tool for Managing Heterogeneous Distributed Web Services . ... Navigation between the CDS services, SIMBAD, the catalogue service, the VizieR catalogue browser and the Dictionary of nomenclature is developed, as well as graphic and image-based functionalities (SIMBAD, ALADIN). ... 1997). ... The CDS has taken advantage of the WWW, first, of course, to develop WWW versions of its services : SIMBAD (1996), the catalogue service (1993), the Dictionary of Nomenclature. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/genovaf.html -- 13.5 Кб -- 15.05.1998
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1700. Achieving Stable Observing Schedules in an Unstable World
... Operations of the Hubble Space Telescope (HST) require the creation of stable and efficient observation schedules in an environment where inputs to the plan can change daily. ... A process and software architecture is presented which achieves stable and efficient observation schedules by dividing the task into long term and short term components. ... However, the resulting long range plan would be unstable as unscheduled observations in a week bin would have to be rescheduled. ...
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Ссылки http://www.adass.org/adass/proceedings/adass97/giulianom.html -- 14.1 Кб -- 15.05.1998
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