... 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. ... If a likely source is found its position and shape parameters are computed by moments and the pixels assigned to the source are set equal to the source number. ... The source is again classified as either ``point'' or ``extended'' from a comparison of its with to that of the PSF width. ...

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• Background algorithm
• Algorithm

... GPI Data Pipeline 1.0 documentation . ... Thermal/Sky Backgrounds . ... Using Thermal/Sky Backgrounds in GPI Data Reduction: . Creating Calibrations: . ... Thermal emission (from sky or telescope) becomes an important background source for wavelengths longer than 2 microns. ... The pipeline treats thermal/sky backgrounds similar to dark frames and is designed to subtract a thermal/sky background, scaled to the integration time of the science image, from K-band observations. ...

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• The Hubble Deep Field -- Schedule 11/10/95
• Sky Background
• COS Background Performance

... This paper describes the main algorithms used by the Einstein Level One processing to create the exposure masks and the background maps for Einstein IPC images, and how these algorithms were recreated in the IRAF environment. Our goal was to recreate the algorithms used by the Level One Processing to create exposure masks and background maps for Einstein Image Proportional Counter (IPC) data (cf. sections 2.5 and 2.7 of Harnden et al. ...

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• A Method for Minimizing Background Offset Errors When Creating Mosaics
• Heuristic Estimates of Weighted Binomial Statistics for Use in Detecting Rare
• Towards Optimal Analysis of HST Crowded Stellar Fields

Next: AXAF Recipes Up: ROSAT HRI Recipes Previous: Quantum Efficiency Correction (a.k.a. For some observations, a significant amount of data may have been rejected during SASS processing because the background level was higher than the calculated threshold for rejection. ... REJECTED EVENTS . ... The recipe will allow the user to include rejected events in the generation of a new qpoe file and filter on the background level. ... This creates a qpoe file with standard + rejected events. ...

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• The AstroStat Slog significant
• The AstroStat Slog background
• The AstroStat Slog background marginalization

SiD Tracking using VXD Nick Sinev, University of Oregon Plan Motivation Track reconstruction algorithm Performance for single tracks Does it have any limits ? With backgrounds To do Motivation Tracking in SiD is a challenge, especially pattern recognition. ... Limitations caused by reconstruction speed consideration In the presence of high number of background hits, number of 3-point combinations used as track seed became enormous if we consider all combinations. ...

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Next: Sky background definition Up: Background Definition Previous: Smoothing spline interpolation . The command BACKGROUND/SMOOTH enables to define the background without previous order definition. This feature is useful for example to correct for the background the image required for the order definition. ... All above methods are implemented in command BACKGROUND/ECHELLE and selected by the echelle keyword BKGMTD . ...

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• Estimating the Sky Background
• Regularization from significant structures
• Combining Methods

... The Cosmic X-Ray Background . ... Now, peering through a hole in the obscuring gas and dust of our own Milky Way Galaxy, the powerful orbiting XMM-Newton telescope has recorded this deep image of the x-ray sky , resolving some of the mysterious background into many faint individual sources. ... Do massive black holes reside in the hearts of all large galaxies? ... Publications with keywords: black hole - XMM-Newton - x-ray background - cosmic microwave background radiation - X-ray . ...

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• Астронет > The Cosmic X-Ray Background
• A Jupiter Venus Conjunction
• Астронет > A Jupiter Venus Conjunction

T he Siding Spring Survey (SSS) is a Near-Earth Object search program that utilises the 0.5-m Uppsala Schmidt Telescope at Siding Spring Observatory, N.S.W., Australia. ... The mission of the Siding Spring Survey is to contribute to the inventory of near-earth objects (NEOs), or more specifically, the potentially hazardous asteroids (PHAs) and comets (PHOs) that may pose a threat of impact and thus harm to civilization. ... Based on the CSS Mission page . ... Siding Spring Survey Main Page . ...

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• The repainted Farnham dome with the AITC in the background

... 2000 November 9 . The Cosmic X-Ray Background . ... Notably, the faint sources tend to be green and blue, showing x-ray characteristics of huge amounts of material falling into massive black holes in very distant galaxies. ... The XMM-Newton results add to the growing consensus that they do and that, from across the universe , x-rays produced as matter feeds these black holes account for the cosmic x-ray background. ... About APOD | ...

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• APOD: March 8, 1999 - A Jupiter Venus Conjunction
• The Sparkle Plug-In: Notes
• APOD: 2000 December 30 - A Year of Resolving Backgrounds

This diagram shows the six superimposed "layers" of the CSS table model. This diagram illustrates the algorithm for calculating a cell's final background. ... The diagram shows how, looking down on the six rectangles, one may compute the background color of each cell. ... A cell without a background color in the top layer is depicted as a "window" onto the lower layers, which give its final background color. ...

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• Image: Trees in the Vatican. San Pietro is on the background.
• Image: Lawn of the temple. Golden spear on the background is explained on the
• Image: Rose alley; you can see fountain in the background.

... Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Foreground emission and Cosmic Microwave background intrinsic anisotropies . ... Since its discovery the Cosmic Microwave Radiation (CMB) has been one of the pillars of modern Cosmology. ... Further development of this work is the application of already tested algorithms to disentangle the foreground emission from the CMB maps and the determination of the CMB intrinsic emission. ... Return to list of thesis topics ...

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• Reduce the background data
• Very Large Telescope mirror cell and Auxiliary Telescope in the background
• Vegetation on the ALMA site with Licancabur in the background

... 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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• PPEUC Programme - Cosmic Microwave Background Workshop
• OptInt PmWiki : PmWiki / Backup and Restore
• OptInt PmWiki : PmWiki / Wiki Style Examples

... To address the problem of point-source photometry in restored images Lucy (1994) suggested a two-channel photometric restoration method in which the points are represented as functions in one channel and the background, constrained to be smooth by an additional entropy constraint, in the other. ... In the new CPLUCY implementation the stars can be at arbitrary x , y sub-pixel positions but the entropy constraint on the background, used by PLUCY, is retained. ...

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• Space Telescope-European Coordinating Facility
• Some Experiments with the Restoration of NICMOS Camera 2 Images of OMC-1
• NICMOS Data Calibration and Analysis

... autoOutline (int startX, int startY) . ... 0 and the boundary points can be accessed in the public xpoints and ypoints fields. public void autoOutline (int startX, int startY, double lower, double upper) . 0 and the boundary points can be accessed in the public xpoints and ypoints fields. public void autoOutline (int startX, int startY, int lower, int upper) . This is a variation of legacy autoOutline that uses int threshold arguments. public void autoOutline (int startX, int startY) . ...

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• BackgroundSubtracter (ImageJ API)
• IJEventListener (ImageJ API)

... The requirements contained in the current National Electrical Code and NFPA Standard for Electrical Requirements for Employee Workplaces apply to all electrical equipment, installations, and usage's at APO. ... do not use defective electrical equipment. ... the Site Safety Officer is to be notified of overloaded circuits in order to replace fuses and reset circuit breakers. ... the only multiple outlet adapter, other than extension cords, allowed are those have internal circuit breakers. ...

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... Summary:background information and some basic backup and restore procedures:) . ... Your wiki installation contains some unique data in the following directories: . ... The following *nix command, executed from the parent directory of your wiki's directory, will put a complete backup archive of your site in your home directory. tar -zcvf ~/wiki-backup-`date +%Y%m`.tar.gz wiki/ . ... Select the folder you want to backup as explained before (probably either only the data or the whole wiki directory) ....

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• PPTA Wiki | Main / Highlights
• Recording Systems History and Background
• lbaops:lbadec2009:v255h [ATNF VLBI Wiki]

Disastrous earthquakes happen 100 to 200 times a year. ... There is a chance that the data of ionospheric plasma observations hold an answer to the latter question. Satellites and ground-based facilities may detect earthquake precursors in the ionosphere a few hours or days before the main shock. ... ULF "Hz"-oscillations have been recorded several hours before the main shock in a narrow magnetic field tube (40...100 km along the satellite trajectory) conjugated with epicenter of the earthquake. ...

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• SPECTROPHOTOMETER FAGOT

... The UK has a very vibrant solar system science community highly regarded internationally. ... The knowledge gained from such research has significant application to other STFC science areas, and indeed the science of other research councils. ... We therefore seek support to provide the 2012 Introductory Solar System Plasmas School, which will provide valuable training for the next generation of solar system scientists. ...

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• An Overview of the Coupled Earth-Sun System PPARC Introductory Solar System
• Background
• HISTORICAL BACKGROUND

Next: Gravitational Wave Background from Previous: Galactic Gravitational Wave Background . ... It is intuitively clear that at frequencies above the critical ones for our Galaxy, one will detect rare bright jerks produced by coalescing white dwarfs   (at a rate of 1 per 100 year) and NS (at a rate of 1 per - year) in our Galaxy, against a background of the extragalactic stochastic GW. ... Firstly we consider GWB from close individual galaxies, and then will discuss overall extragalactic GWB. ...

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• Transparency of the Stochastic Background
• Galactic Gravitational Wave Background
• Gravitational wave background from nearby galaxies

To run a process in the background as a job and carry on working add an (ampersand) at the end of the command line. ... The shell forks a child process to run the command and displays the job number ( [ n ] ) and the PID (Process IDentifier) number. ... If the command is likely to produce error messages you will need to redirect standard error. ... Do not run an interactive command that requires you to type something at the terminal as a background job. ... You will then have to kill its process . ...

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• Placing a foreground process in the background
• Managing background jobs
• Multiwavelength Study of Mira Ceti-Type Variable Stars