Next: Search Algorithms Up: Computational Methods Previous: Image Restoration . The previous sections have described the most frequently used computational techniques for image handling in optical astronomy. After the images have been calibrated and manipulated to give the best representation of the data the astronomical information has to be extracted. For frames which contain a large number of objects automatic methods are required to locate them. ... Search Algorithms . ...

... A technique allowing automatic representation by a relatively small number of independent parameters based on the principal component analysis of data sequences is presented. ... In recent years the spectrum of observed astronomical data can be characterized as greatly varied. ... In this instance, the problem of initial description and classification of newly-observed data becomes most urgent, especially if there is a lack of preliminary observational material and theoretical expectations. ...

SAI 175 anniversary . ... Moscow University . Search for in SAI Moscow University Search for in Russian astronomical resources . ... SAI Astronomical Databases . ... Browse SAI Software archive(ftp.sai.msu.su) . ASTRONET.RU - Russian Astronomical Network (available in translit also) . ... SAI Supernovae Research Group . ... Department of the Galaxy and Variable Stars (in Russian) . Sternberg Astronomical Institute Seminars . ... All-Russian Astronomical Olympiad (in Russian) . ...

THE PARAMETERS INVOLVED IN HAPKE'S MODEL FOR ESTIMATION OF THE COMPOSITION OF THE EJECTA LUNAR TERRAINS. ... In the previous papers we were estimated the surface roughness of the ejecta lunar terrains by means comparison of the local phase function and the average integrated lunar indicatrix. ... The Hapke's theoretical model of the lunar surface reflection. ... For THE PARAMETERS INVOLVED IN HAPKE'S MODEL: S.G. Pugacheva, V.V. Shevchenko a low-albedo lunar surface parameter Bo = 1. ...

Next: Multi-frequency deconvolution - MFCLEAN Up: Deconvolution with maximum entropy Previous: Deconvolution with maximum entropy . ... The quality of the maximum entropy solution can depend very strongly on the rms and flux parameters - these parameters should be set with some care, or some experimentation may be necessary. ... map, beam : As with CLEAN, you give task maxen a dirty image and a dirty beam. default : You also have the option of supplying a default image. ... MAXEN . ... Dirty image . ...

Next: Simulations Up: Maximum Likelihood Estimation of Previous: Introduction . The properties of an ensemble of faint galaxies can be defined by the distribution of the parameters of the models that best fit each individual object. ... The model also includes instrumental parameters, such as the sky background (estimated locally) and amplitude of the noise. ... The probability of the observed value is then computed for each pixel using the adopted error distribution. ...

... Donate to Support Science Literacy . ... 2016 Annual Awards . The ASP is accepting nominations for the organizationтАЩs national annual awards which recognize special achievements in astronomy research, technology, education, and public outreach. ... Shop the AstroShop . ... The Astronomical Society of the Pacific (ASP) is accepting nominations for the organizationтАЩs national annual awards which recognize special achievements in astronomy research, technology, education, and public outreach.. ...

... In the past month, I?ve noticed relatively frequent paper appearance in arxiv/astro-ph whose title includes Bayesian or Markov Chain Monte Carlo (MCMC) . ... astro-ph:0708.2340v1] Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -I. Methodology and a Fast Fitting Algorithm by L. Miller et. al. [astro-ph:0708.1871v1] Dark energy and cosmic curvature: Monte-Carlo Markov Chain approach by Y. Gong et. al. in addition to the previous posting in this slog, [ArXiv] Bayesian Star Formation Study. ...

... For a certain group of XMM PPS products (e.g. EPIC background maps, EPIC maximum-likelihood source lists, EPIC images, EPIC sensitivity maps) a list of commands is executed stored in an ascii file (hereafter check file). ... The tests include existence and parameter range checks for header key words and source tables columns of EPIC PPS Fits files. ... This check file performs existence and parameter range checks for EPIC PN, MOS1, MOS2 background maps in the energy bands 0,1,2,3,4 and 5. ...

... Learning set is formed on basis of the Taken' algorithm. ... For 10, 100, 200, 300 day forecast the time lag was correspondingly = 10, = 100, = 200, = 300. ... For every forecast (10, 100, 200, 300 days) ANN started k = 10 times. ... On figure, 1 it is shown the MAE and RMS statistics for 10-, 200- and 300-day forecast for Xp : M AE = 1 n i=n |f orecastav erag ei - realv aluei |, ... i=1 139 RMS 300 MAE 300 RMS 200 RMS 10 MAE 10 MAE 200 Figure 1: 10, 200, 300 day statistics for Xp forecast. ...

Next: Parameters Up: How to use CONSTRICTOR Previous: NPOI raw data files Contents . The parameter file contains information for CONSTRICTOR on the location of the raw data files, start and stop times, integration time, etc. ... The parameter file, YYYY-MM-DD.par , can now be created using the rawlist procedure of . ... Check beginning and tail of the listing for each file. ... Next: Parameters Up: How to use CONSTRICTOR Previous: NPOI raw data files Contents Christian Hummel 2015-04-28 ...

... Астрономическая неделя с 11 по 17 апреля 2016 года . ... Александр Козловский . ... День открытых дверей на Пущинской РадиоАстрономической Обсерватории 09 апреля 2016 года . ... Полное солнечное затмение 9 марта 2016 года . ... Полное лунное затмение 28 сентября 2015 года . ... Затмение, которое произойдет 28 сентября 2015 года, является повторением через сарос (цикл повторений затмений равный 6585 дней или 18 лет 11 дней) полного лунного затмения от 16 сентября 1997 года с максимальной фазой 1,20.....

... I determine th as a time period (from some moment in the past till the present moment) during which papers responsible for 1/2 of the total citation index were published. Parameter Nt represents averaging of the citation index over this period: Nt = C.I./2th 1 Intro duction The problem of estimation of an impact of a scientist (or a group of them) is an actual one (see, for example, [1] and references therein). ... One published in 1965 a paper with C.I.=5000, and nothing after that. ...

... Chapter 1. ... Problems of observational radio cosmology (6) . ... Analysis of radio astronomical data (32) . ... Data analysis system (33) . ... Actuality, goals and results to depend (45) . ... Interactive processing of continuum radio spectra of radio sources (72) . ... Creation of the astrophysical catalogs data base CATS and its application for selection and analysis of radio galaxy samples (112) . ... Data and methods (176) . ... Results of analysis of known radio galaxies data (179) . ...

Next: Program use Up: Description of program searchdup Previous: Description of program searchdup . Parameter input is done with a graphic user interface. ... Input file: Name of the input catalog file. It has to be formatted, one record per source/observation, according to the format used in the Arcetri observations and source archives. ... Minimum number of observations per source Source with less than this number of independent observations are not included in the output file . ...

... An estimate the rotation period of cometary nuclei is important for understanding and describing the physical processes of the cometary activity. Unfortunately, the measurements of the rotation periods of the comet nucleus depend on the model assumptions and it is one of the main reasons for the scatter of the estimates given in various articles for a given comet. ... Right: the image of the comet 29P/Schwassmann-Wachmann 1 obtained at the 6-m telescope. ...

In this chapter we will consider an example of visual expert system written on the Actor Prolog language. ... There are a lot of methods of oil field bed stimulation that increase output of the oil production: thermal, physical-chemical, gas, microbiological, and others. ... Fig. ... The Top-Most diagram consists of three blocks: the "Describe parameters of hydrocarbon field" block, the "Check adaptability of existed methods of oil production" block, and the "Display solution" block. ... Gas methods. ...

... Stellar Evolution . Nucleosynthesis in Stars . The Evolution of Star Clusters . JAVA Physics Lab . Alternative Energies Class . Steve Kevan's Physics 251 Class . ... Talk on Solid State Physics of CCD detectors . Talk on Cosmological Issues . ... Digital Spectra of Stars . NETexperts E-mail List . The Electronic Universe Project e-mail: nuts@moo.uoregon.edu ...

... GUIґfying and Documenting your Shell Script Peter. ... We describe a simple method to annotate shell scripts and have a preprocessor extract a set of variables, present them to the user in a GUI (using Tcl/Tk) with context sensitive help, and run the script. ... Tcl/Tk: TkRun The GUI that is created will provide a simple interface to a program that is spawned by the GUI. ... Sample Script: testscript Here is an example header from a Cґshell script with which Figure 1 was made. ...

... Binary orbits in the acceleration/period plane . Circular Orbits . ... We first present the equations for the period and acceleration of a pulsar in an eccentric binary system as a function of its position in the orbit. ... In Freire, Kramer & Lyne (2001) (from where most of this text and following equations are taken), we describe in more detail how circular binary orbits can be determined from the observed periods and accelerations of the pulsar. ... where is the orbital period of the binary. ...