... The task first computes a background image in order to identify pixels that may be part of a source. The task uses two different algorithms for detecting ``point'' and ``extended'' sources. ... This is necessary because some faint ``point'' sources may have been missed by the point-source detection algorithm, but picked up by the extended-source detection algorithm. ... When the detection process is finished a check is made on extended sources to see if they can be split into two or more sources. ...

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• Comments

... The standard science quicklook processing produces over a dozen sky maps at each downlink, and these maps are automatically searched for potential transient point sources. ... We have found that a heuristic modification of a formula derived by Li & Ma (1983) provides reasonably accurate estimates of p -values for point source detections even for very low p -value detections. ... Case 1u. The most straightforward approach uses the signal , where . ... To get a p -value, use . ...

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• Infrared Jitter Imaging Data Reduction: Algorithms and Implementation
• Object Detection Using Multi-Resolution Analysis
• ADASS Conference Series

... Archives . ... Astronomers confront with various censored and truncated data. ... This area is called survival analysis . If your library has The American Statistician subscription and you are an astronomer handles censored or truncated data sets, this primer would be useful for briefly conceptualizing statistics jargon in survival analysis and for characterizing uncertainties residing in your data. Survival Analysis: A Primer by David A. Freedman . ... Chandra Blog . ... SAMSI AstroStat Prog. ...

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• The AstroStat Slog Blog Archive Open and Shut [Equation of the Week]
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• The AstroStat Slog Blog Archive after ?Thanks to Henrietta Leavitt?

The final hdf sequence of observations is listed in the phase-2 proposal. ... Observations run from 352:16 to 362:19. 10-sigma limits (20 pix area) Filter Nexp hours counts/s AB mag F300W 100 48.93 0.0148 27.47 F450W 62 36.52 0.0232 28.12 F606W 77 34.94 0.0370 28.71 F814W 49 34.86 0.0299 28.02 The limits are roughly 0.2 mag brighter than originally projected. 7.5e-7 erg cm-2 s-1 A-1 arcsec-2 (= 22.4 ABMAG in F814W ) Dark: maximum background 2100 sec Bright windows all go to F300W Dark ...

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• WFPC-2 ETC Help
• J. Boia RИsumИ
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... PUL VLBI Analysis Center . ... Pulkovo EOP and Reference Systems Analysis Center (PERSAC) is located at the Pulkovo Observatory . ... Processing of VLBI , GPS, and optical observations aimed at analysis of the Earth rotation, station displacement, and celestial reference system. ... Celestial Pole Offset (CPO) and Free Core Nutation (FCN) . Four daily updated CPO and FCN series (models) are provided. ... File fcn1.dat contains the ZM1 FCN model with variable amplitude and phase. ...

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My research interests are focussed on the theory and modelling of accretion processes as well as star and planet formation mechanisms. I am particularly interested in the stability properties of accretion discs, the generation of MHD turbulence and associated angular momentum transport, disk - planet interactions and the origin and characteristics of jets and winds from accreting systems . ... These results have been published in Salmeron & Wardle, 2005, M.N.R.A.S., 361: 45-69. ...

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• Research Interests
• Homepage of Charley Lineweaver

I was born in 1955, finished well-known 2nd school (mathematical) in Moscow, graduated at mathematical department of Moscow State University (MSU). My current positions are sci. researcher at Institute of Mechanics MSU and Network admin at Sternberg Astronomical Institute MSU. ... Hobbies: Anchient history, swimming, yachts, drinking vodka and good vine. ... Rambler in Russia: Some notes (in russian). ... For AstroNet users: see Netiquette in AstroNet (in Russian) for our administrative policy. ...

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• Further Information and Bibliography
• Oleg Bartunov's Home Page
• APOD: 2002 February 6 - The Cosmic Infrared Background

Next: Fitting of data Up: Extraction of Information Previous: Extraction of Information . For projects which perform statistical analysis on groups of objects, it is important to rely on an objective search method to extract them from the data frames. ... The simplest and fastest method is using a given level over a previously determined background value as the criterion to identify possible sources. ...

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• Analysis in the time domain
• Prof. Edward L. (Ned) Wright
• Time series analysis in the frequency domain

A very important stage in a story of formation of any new science is the shift from discussion of situation which are possible but do not occur in practice due to some reason to recognition of real phenomena of interest. ... We suggest to consider computer viruses as this new specific form of life which is coming in the contact with our form of life. ... Computer life has been created by human being, the role of independent evolution of computer viruses seems to be still negligible. ...

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The "E-ALFA consortium" is a group of individuals interested in extragalactic spectral line programs usng ALFA and who are committed to coordinating efforts to the extent possible in order to maximize science return and program efficiency. ... The E-ALFA "coordinating committee" consists of representatives of E-ALFA consortium projects that have been granted telescope time or those in the development stage that have been endorsed by the E-ALFA consortium. ...

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• GALFA Consortium Guidelines
• Reducing your data in Analyz
• Pilot Fast Mapping Survey

... Structure Detection in Low Intensity X­Ray Images using the Wavelet Transform Applied to Galaxy Cluster Cores Analysis Jean­Luc Starck and Marguerite Pierre CEA/DSM/DAPNIA F­91191 Gif­sur­Yvette cedex Abstract. ... Multi­resolution filtering methods based on the wavelet coe#cients detection are also discussed. Finally, using a set of ROSAT HRI deep pointings, the presence of small­scale structures in the central regions of clusters of galaxies is investigated. ... 1995; Rosati et al. ... 1996). ...

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• NICMOS Data Calibration and Analysis
• A Color Analysis of NICMOS Parallel Observations
• STScI NICMOS Software

Next: Listing Image Values Up: Image Analysis Previous: Image Analysis . Task histo is a fairly commonly used task, giving a number of image statistics and a simple histogram. Apart from the input image (keyword in ), it can take a region of interest ( region ), a range to determine the histogram over ( range ), and the number of bins in the histogram ( nbins ). ... region . ... If you do not like histo , or you would like a PGPLOT plot of the histogram, you could use the task imhist instead. ...

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• Homepage Bjorn Emonts
• Perturbation Analysis
• The UKST H Survey - Scientific Background

... Since founding of the Olympiad] The Olympiad participants are not supposed to study at any institutions of higher education (university or school which can be considered technical colleges). ... Note: Exception may be done for the second time participating in IAOs students not older than 14.00 years on January 1st of the year of the Olympiad (i.e. born after January 01, 1999). ... Team of region, city, town: . ... of the XVIII International Astronomy Olympiad (2013), . ...

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• XV International Astronomy Olympiad: Important Notes for interested...
• XIII International Astronomy Olympiad: Important Notes for interested
• XIV International Astronomy Olympiad: Important Notes for interested

Application of IVOA software tools for radio sources investigation Zhelenkova O., Kopylov A., Chernenkov V. The interrelationship between the objects of astronomical catalogs in the different ranges of electromagnetic spectrum and their association into the real astrophysical source has obvious scientific interest. ... We used NVSS as the reference coordinate catalog. ... For 60% of radio sources identified with the objects of the radio catalogs we discovered optical candidates in SDSS survey. ...

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• Description of algorithm
• Mathematics: <math.h>
• Using Ceilidh as a Student

... Astrophysics Group . Research . Cosmic Microwave Background (CMB) . ... A significant fraction of the Astrophysics Group is involved in work on the Cosmic Microwave Background, both experimental and theoretical. We are currently operating the Arcminute Microkelvin Imager , an arcminute-scale survey telescope, and developing analysis techniques for the Planck satellite. ... 2013, Astrophysics Group, Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE . ...

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• Galaxy Evolution: Computing
• Comparison of Microwave Background Radiation models and experiments
• OptInt PmWiki : PmWiki / Wiki Style Examples

... Lyndon B. Johnson Space Center . ... Mae C. Jemison (M.D.) . NASA Astronaut (former) . ... ORGANIZATIONS: Member, American Chemical Society, Association for the Advancement of Science, Association of Space Explorers. ... Clinical Teaching Associate, University of Texas Medical Center. ... Dr. Jemison completed her internship at Los Angeles County/USC Medical Center in July 1982 and worked as a General Practitioner with INA/Ross Loos Medical Group in Los Angeles until December 1982. ...

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• Astronaut Bio: Jose Hernandez (01/2011)
• Astronaut Bio: Dale A. Gardner
• Astronaut Bio: Gregory Errol Chamitoff (10/2013)

Appendix B: Annotated Bibliography There are a wide variety of texts available for those who are interested in learning more about assembly language or other topics this text covers. ... Microprocessor Programming for Computer Hobbyists Neill Graham TAB books ISBN 0-8306-6952-3 1977 This book provides a gentle introduction to data structures for computer hobbyists. ... IBM Assembler Language and Programming Peter Able Prentice-Hall ISBN 0-13-448143-7 1987 A college text book on assembly language. ...

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• http://www.arcetri.astro.it/irlab/doc/library/recipes/bookcpdf/c4-0.pdf
• http://www.arcetri.astro.it/irlab/doc/library/nr/f4-0.pdf
• Arcetri Library Classification System

... The UK has a very vibrant solar system science community highly regarded internationally. ... The PPARC Introductory and Advanced Courses in Solar System Plasmas has, since the1980s, played an important part in the early training of solar, heliospheric, magnetospheric and ionospheric physicists. ... We therefore seek support to provide the 2007 Introductory Solar System Plasmas School, which will provide valuable training for the next generation of solar system scientists . ...

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• STFC Introductory Solar System Plasmas Summer School
• Background
• J.E. Chambers, Research Astronomer

... Samara State Aerospace University Staff Myasnikov Vladislav Valerevich . ... How to Use Geoinformation Technologies and Space Monitoring for Controlling the Agricultural Sector in Samara Region // Pattern Recognition and Image Analysis. ... Kuznetsov A.V. , Myasnikov V.V. Remote sensing data verification using model-oriented descriptors // 4th International Conference on Analysis of Images, Social Networks and Texts, AIST 2015;, , , , 2015, P. 96-101 . ... Pattern Recognition and Image Analysis. ...

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• Nikonorov Artem Vladimirovich
• Денисова Анна Юрьевна. Публикации
• Копенков Василий Николаевич. Публикации

... 2005 International University Bremen (Bremen, Germany) . ... 2005 International Conference "Topology, Analysis, and Applications in Mathematical Physics", Moscow State University, (Moscow, Russsia); invited speaker . July 2004 Max Planck Institute for Mathematics (Bonn, Germany) . ... June 2004 International Conference "Representation theory, Dynamical Systems, and Asymptotic Combinatorics", Euler International Mathematical Institute" (St. Petersburg, Russia); invited speaker . ...

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