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601. http://www.adass.org/adass/proceedings/adass02/reprints/P4-3.pdf
Astronomical Data Analysis Software and Systems XII ASP Conference Series, Vol. 295, 2003 H. E. Payne, R. I. Jedrzejewski, and R. N. Hook, eds. Adaptive Optics Software on the CfAO Web Page Andreas Quirrenbach, Vesa Junkkarinen, Rainer K? ler oh University of California, San Diego, Center for Astrophysics and Space Sciences, Mail Code 0424, La Jol la, CA 92093-0424, USA Abstract. ... AO Simulation Package This software, written by Francois Rigaut, sim? ulates an adaptive optics system. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P4-3.pdf -- 69.8 Кб -- 11.03.2003
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602. http://www.adass.org/adass/proceedings/adass02/reprints/P4-2.pdf
... Using a simple 2-D Gaussian Point Spread Function (PSF) on a constant (flat) sky background, I derive a theoretical photometric and astrometric performance model for analytical and digital PSF-fitting stellar photometry. ... The total variance of the stellar intensity measurement of over-sampled stars is thus 2 SE 2 SE :bright + 2 SE 2 :faint = SE + rms SE + BE + 2 RON . ... By symmetry, the variance of the stellar y position measurement of bright over-sampled stars is the same. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P4-2.pdf -- 79.7 Кб -- 11.03.2003
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603. http://www.adass.org/adass/proceedings/adass02/reprints/P4-14.pdf
Astronomical Data Analysis Software and Systems XII ASP Conference Series, Vol. ... Rather than using methods conventional in astronomy (e.g., power spectrum and cross-correlation analysis) we employ rule discovery techniques commonly used in analyzing stock-market data. ... Clustering and Rule Discovery The need to understand time series data is not unique to astronomy: time series data exists in a wide variety of fields including geology and atmospheric science as well as many business applications. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P4-14.pdf -- 207.6 Кб -- 11.03.2003
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604. http://www.adass.org/adass/proceedings/adass02/reprints/P4-13.pdf
... We are exploring the use of unlabeled data for supervised classification and for semi-supervised clustering. Current automated classification methods rely heavily on supervised learning algorithms that require training data sets containing large amounts of previously classified, or labeled, data. ... Some labeled data are needed to actually classify rather than cluster the data. ... One set, l , consists of the labeled data (xi ,ci) where xi is a feature vector and ci is a class label. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P4-13.pdf -- 67.8 Кб -- 11.03.2003
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605. http://www.adass.org/adass/proceedings/adass02/reprints/P4-12.pdf
... 295, 2003 H. E. Payne, R. I. Jedrzejewski, and R. N. Hook, eds. FLY: a Tree Co de for Adaptive Mesh Refinement U. Becciani, V. Antonuccio-Delogu, A. Costa INAF ґ Astrophysical Observatory of Catania D. Ferro Department of Physics and Astronomy ґ University of Catania Abstract. ... This paper shows an example of the integration of a tree N-body code with an adaptive mesh, following the PARAMESH scheme. ... FLY (Fast Level-based N-bodY code) is a fully parallel code based on a tree algorithm. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P4-12.pdf -- 216.5 Кб -- 11.03.2003
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606. http://www.adass.org/adass/proceedings/adass02/reprints/P4-10.pdf
... Classifiers We apply machine learning methods to generate classifiers from `training' data sets, each set being a particular sample of ob jects with pre-assigned class names that have measured X-ray fluxes and, wherever possible, data from other wavelength bands. ... Figure 1. ... With ClassX, one can isolate sources with a greater degree of class name ambiguity and look into why their classification in the training set differs from the OC1 classification (see Figure 2). ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P4-10.pdf -- 390.6 Кб -- 11.03.2003
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607. http://www.adass.org/adass/proceedings/adass02/reprints/P4-1.pdf
... To perform robust image coaddition, mosaic generation, extraction and position determination of faint sources, the pointing will need to be refined to better than a few-tenths of an arcsecond. ... When absolute astrometric references are available, the "fiducial" reference image (mosaic) frame is treated like a single input image, which contains the absolute point source positions. ... The SSC point source extractor was then used to extract 50 point sources from each input image (with pointing error...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P4-1.pdf -- 88.3 Кб -- 11.03.2003
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608. http://www.adass.org/adass/proceedings/adass02/reprints/P3-9.pdf
... PacketLib is a C++ open-source software library for writing applications which deal with satellite telemetry source packets, provided that the packets are compliant with the CCSDS Telemetry and Telecommand Standards. ... From an input stream of bytes, the library is able to recognize automatically the source packets (described by a simple configuration file), and provides a simple access to each packet field by means of an ob ject oriented interface. ... The class diagram of PacketLib. applications....
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P3-9.pdf -- 92.1 Кб -- 11.03.2003
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609. http://www.adass.org/adass/proceedings/adass02/reprints/P3-8.pdf
... 295, 2003 H. E. Payne, R. I. Jedrzejewski, and R. N. Hook, eds. Pro jecting 3-D Simulations Into Pseudo Observations Alex Antunes, John Wallin School of Computational Sciences, George Mason University, Fairfax, VA 22030 Abstract. ... In Nbody simulations, we model bulk gas, heated gas, and stars as individual particles in three-dimensional space. ... Pro jecting 3-D Simulations Into Pseudo Observations 441 5. ... The key is to use our simulations to recreate observations. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P3-8.pdf -- 67.6 Кб -- 11.03.2003
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610. http://www.adass.org/adass/proceedings/adass02/reprints/P3-7.pdf
Astronomical Data Analysis Software and Systems XII ASP Conference Series, Vol. 295, 2003 H. E. Payne, R. I. Jedrzejewski, and R. N. Hook, eds. Undistorting FUSE Using Wavelets Paul Barrett Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 Abstract. This paper describes a method for determining the geometric distortion of the FUSE detectors using data from the in-orbit stimulation lamp exposures. ... Segment 1A of detector 1 is shown in Figure 1. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P3-7.pdf -- 421.7 Кб -- 11.03.2003
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611. http://www.adass.org/adass/proceedings/adass02/reprints/P3-6.pdf
... 295, 2003 H. E. Payne, R. I. Jedrzejewski, and R. N. Hook, eds. Generalized Self-Calibration for Space VLBI Image Reconstruction Sergey F. Likhachev Astro Space Center, Profsojuznaya 84/32, GSP-7, 117997, Moscow, Russia Abstract. Generalized self-calibration (GSC) algorithm as a solution of a non-linear optimization problem is considered. ... The GSC-algorithm was implemented in the radio astronomy imaging software pro ject Astro Space Locator (ASL) for Windows developed at the Astro Space Center. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P3-6.pdf -- 82.1 Кб -- 11.03.2003
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612. http://www.adass.org/adass/proceedings/adass02/reprints/P3-5.pdf
... This paper presents an algorithm for solving antenna based polarization leakage in a radio interferometer using co-polar observations of unpolarized sources. If ignored, polarization leakage manifests itself as closure errors in parallel hand (co-polar) visibilities. ... Results of such a by an angle satisfying tan = Solving for Polarization Leakage in Radio Interferometers 1.5 471 1 Gains 0.5 Imag 0 Leakage -0.5 -1 -1.5 -1.5 -1 -0.5 0 Real 0.5 1 1.5 Figure 1. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P3-5.pdf -- 172.5 Кб -- 11.03.2003
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613. http://www.adass.org/adass/proceedings/adass02/reprints/P3-4.pdf
... Fits each source with simple (i.e., not including point-spread function) model to establish source extent and (Poisson-correct) significance (using the stand-alone python program ximgfit1 ) Ї Flags extended, confused and problematic sources Ї Computes median (or mean) background level Ї Excludes times of high background Ї Extracts spectra, postage stamp images, and light curves of each source for more detailed ... Detected X-ray sources are marked in both images. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P3-4.pdf -- 186.4 Кб -- 11.03.2003
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614. http://www.adass.org/adass/proceedings/adass02/reprints/P3-2.pdf
... QtPlot supports ASCII and XML format. ... This modified package, QtPlot, supports column delimited ASCII format tables (the so-called IPAC table format), but of greater importance is the fact that it supports XML structured for astronomical plot directives, underpinned by the eXtensible Data Format(XDF), a container for transporting scientific data. ... Data Format Broadly speaking, QtPlot supports two formats: column delimited ASCII tables (IPAC table format), and XML. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P3-2.pdf -- 73.0 Кб -- 11.03.2003
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615. http://www.adass.org/adass/proceedings/adass02/reprints/P3-16.pdf
Astronomical Data Analysis Software and Systems XII ASP Conference Series, Vol. ... It supports FITS images and binary tables, multiple frame buffers, region manipulation, and many scale algorithms and colormaps. ... FITS Binary Table smoothing using boxcar, tophat, and gaussian algorithms. Ї new pro jection, panda, and compass regions. ... Results are sent back to DS9 for display. ... Pro jection, Panda, and Compass Regions DS9 now provides three new region types: Pro jection, Panda, and Compass. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P3-16.pdf -- 710.8 Кб -- 11.03.2003
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616. http://www.adass.org/adass/proceedings/adass02/reprints/P3-14.pdf
... We have developed a new extraction software package called aXe that was specifically designed to handle the ACS spectrophotometric data. Using a pair of direct/grism or direct/prism images, aXe can extract tilted spectra, estimate and subtract the local background, wavelength calibrate, flat-field, and flux calibrate them. ... What is aXe? ... 2001, ST-ECF Newsletter, 29, 5 Pirzkal et al. 2002, aXe User Manual 1.1 Spectral Extraction from ACS and VLT Data 487 Figure 1. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P3-14.pdf -- 358.1 Кб -- 11.03.2003
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617. http://www.adass.org/adass/proceedings/adass02/reprints/P3-13.pdf
Astronomical Data Analysis Software and Systems XII ASP Conference Series, Vol. 295, 2003 H. E. Payne, R. I. Jedrzejewski, and R. N. Hook, eds. AIPS++ Reduction and Analysis of GBT Single-Dish Sp ectral Data James Braatz, Joseph McMullin, Robert Garwood, Athol Kemball National Radio Astronomy Observatory Abstract. ... AIPS++ is in the public domain. ... DISH DISH is the AIPS++ tool for reducing spectral line single-dish radio astronomical data. ... AIPS++ for GBT Single-Dish Spectral Data 3. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P3-13.pdf -- 86.3 Кб -- 11.03.2003
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618. http://www.adass.org/adass/proceedings/adass02/reprints/P3-12.pdf
... The BIMA Image Pipeline is nearing production mode. ... For example, a processing job to fill, calibrate, and image data is composed of a sub-stage that uses a shell script to copy the data to be processed to the work area, a substage that uses a Glish script for filling and calibration in AIPS++ on a serial machine, a sub-stage that uses a Glish script for imaging and deconvolution on a parallel machine such as a Linux cluster, and a sub-stage that uses a shell script to archive the data products. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P3-12.pdf -- 77.1 Кб -- 11.03.2003
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619. http://www.adass.org/adass/proceedings/adass02/reprints/P3-11.pdf
... 295, 2003 H. E. Payne, R. I. Jedrzejewski, and R. N. Hook, eds. Calibration of BIMA Data in AIPS++ Daniel Goscha, David M. Mehringer, Raymond L. Plante National Center for Supercomputing Applications Anuj Sarma University of Il linois Abstract. ... Finally, we will present a comparison of data calibrated in MIRIAD and AIPS++. ... Introduction We present the results of a comparison of calibrated millimeter data from the Berkeley-Illinois-Maryland Association (BIMA) Array using both AIPS++ and MIRIAD....
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P3-11.pdf -- 218.1 Кб -- 11.03.2003
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620. http://www.adass.org/adass/proceedings/adass02/reprints/P3-10.pdf
Astronomical Data Analysis Software and Systems XII ASP Conference Series, Vol. ... This approach may be used as a prototype for other pro jects where either the software cannot be distributed and/or the system resources required to run the software would be prohibitive for the general user. ... ChaRT is a soft- and hardware system designed to provide Chandra users with access to the SAOsac ray tracing routines and allow them to carry out HRMA PSF simulations. ...
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Ссылки http://www.adass.org/adass/proceedings/adass02/reprints/P3-10.pdf -- 96.4 Кб -- 11.03.2003
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