... Posts tagged ?student t? . ... Tags: distribution , error , Gosset , guinness , history , sampling distribution , small sample , student t . Category: arXiv , Fitting , Frequentist , Quotes , Stat | ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray . ...

... Despite the wide spread use of the terms MTF, CTF, limiting resolution, minimum resolvable target, and contrast to describe CCD image system quality, the terms are often misused and their relations are little understood. ... The modulation transfer function (MTF) is a Fourier transform of the line spread function i.e. its equivalent as an integral sum of sine waves taken over the whole range of spatial frequencies. MTF by its Fourier nature can only be used to operate on sinusoidal frequencies. ...

... The pinhole simulation program is a computationally and memory intensive task. ... A parallel version was developed instead, to enable distributed processing on a cluster of workstations. The program makes use of the Message Passing Interface (MPI) standard for parallel processing, implemented as an API (Application Programming Interface) to the Local Area Multicomputer (LAM) programming environment developed at the Ohio Supercomputer Center. ...

... Large-scale production and analysis of mock galaxy images. ... Recently I've been involved in a collaboration ( The Illustris Project ) to create and analyze large-scale simulations of galaxy formation. ... Click to see a comparison between the Hubble Ultra Deep Field and a galaxy formation experiment run on a supercomputer: . ... Today, stars and planets form in clouds of gas and dust in galaxies, clumps of matter denser than the universal average by roughly 30 orders of magnitude. ...

Proceedings of the XXVIIth Young European Radio Astronomers Conference (YERAC). ... Please Note: e-mail addresses and external links in these contributions were correct when these papers were written in 1995, but may no longer be valid. ... In addition to the hypertext version of each paper, indicated by the link from the title of the paper, there are links to postscript versions of each paper, which are suitable for printing if you want a hardcopy of a given paper. ... Sandor Frey (or postscript ) . ...

Main research interests: . 1) Structure and geometry of the circumnuclear medium of AGN, particularly through hard X-ray observations of obscured sources. ... 3) Physics of Ultraluminous Infrared Galaxies (ULIRGs): analysis of the AGN and starburst components through hard X-ray and infrared (with ground-based 3-5 micron spectroscopy, and with Spitzer in the 5-30 micron band) imaging and spectroscopy. ...

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 . ...

Chair of solid state physics . ... The Physics of Phonons . ... In the first part of the course “The Physics of Phonons” the dynamics of atoms in one- and three- dimensional crystalline lattices is considered in detail. The quasiparticle conception in solids, taking phonons as an example, is discussed; creation and annihilation operators of phonons, main properties of acoustic and optical phonons dispersion laws, density of phonon states. ... Crystalline state. ... Acoustic and optical phonons. ...

... PPTA timeline . ... List of projects . ... RedGW . ... One of the main goals of pulsar timing array projects is to limit the existence of a background of gravitational waves (GWs). Jenet et al. (2006) developed a method to determine such a limit if (and only if) the pulsar timing residuals were statistically white. In the paper we used data from six pulsars from the PPTA project to obtain a limit. The remaining pulsars were rejected because their timing residuals were not white. ...

... 172 ] Briefly, the count rate at the detector from a source at a redshift z is . ... Figure 55 shows the ``Green functions'' for the double compact binary merging rate   evolution assuming no collapse anisotropy. ... Another way that diverse peculiarities in the - distribution induced by the sources evolution could arise is connected with a possible non-monotonic character of the star formation rate in galaxies. ... 22 ] Figure  56 shows two-dimensional cuts through the parameter space. ...

Astronomy Picture of the Day . ... 8.03.1997 . ... Credit Copyright: DMR , COBE , NASA , Four-Year Sky Map Explanation: Above are two images of the microwave sky, north and south of our galaxy's equator , based on data from NASA's COsmic Background Explorer (COBE) satellite . ... These spots are the oldest, most distant structures known. They represent temperature variations in the early Universe. ... Publications with keywords: COBE - hotspots . ... Microwave Hotspots: The Oldest Structures Known ...

... March 9, 1997 . COBE Hotspots: The Oldest Structures Known . Credit: DMR , COBE , NASA , Four-Year Sky Map . ... These spots are the oldest, most distant structures known. ... By studying the size and distribution of the spots found with COBE and future missions , astronomers hope to learn what matter and processes caused the spots to form - and hence determine the composition , density, and future of our Universe. ... About APOD > . ...

een able to make significant contributions, in particular relating to the following op en science questions: (1) the ep och of galaxy formation and their star formation history (2) the effect of environmental processes on star formation in galaxies (3) the enrichment of the intra- cluster medium from stripp ed galaxies (4) the imp ortance of dusty starbursts in the formation and evolution of galaxies High-redshift ... Stars show the sky-averaged correlation function. ...

... Release Note for patch to SAS 6.5.0 =================================== Carlos Gabriel Eduardo Ojero XMM-Newton SOC A small patch to change the way the EMOSn_REDIST CCFs are used, has to be issued. ... This goes together with a set of calibration files. ... A large number of SAS users synchronize their calibration repositories to get automatically new released calibration files, but have not updated to SAS 6.5.0., which causes a problem. ...

... Visible Distribution of Galaxies. ... Features of Elliptical, Lens-Shaped, Spiral and Irregular Galaxies. Galaxies with Bar. ... Distribution of Surface Brightness of Surface and Spiral Galaxies. ... Color Characteristics of Galaxies. ... Methods of Galaxies' Mass Determination. ... Hidden Mass of Spiral Galaxies. ... Features of Dark Matter Distribution in E and SO Galaxies. ... The Whole Number of Galaxies and Their Density by the Results of Observation on the 'Hubble' Space Telescope. ...

... Results 3. ... 2004), Escapa (2011): Hamiltonian approach, simplified elastic response. ... PАg. ... Let us recall that assuming a rheological model based in Smith (1974) , Wahr (1979) and IERS (2010) for the elastic/anelastic response of the Earth, the second order harmonic components of the redistribution potential admit a truncated development in complex spherical harmonics in the form Generalized Love Numbers, dependent on: Harmonic order, Excitation frequencies In magnitude, PАg. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... AIA 304 ? ... bottom) images (colour table reversed) of a coronal hole region at the South Pole taken on 14 May 2010. ... In the present work we derive a Differential Emission Measure (DEM) distribution from a region dominated by spicules. ... This distribution is then used to study the thermal properties of the emission contributing to the 171 ? ... From our off-limb DEM we found that the radiance in the AIA 171 ? ...

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

... Moscow, Russia E-mail: krivosheev@iki.rssi.ru Notes: · · The Monte Carlo method (s) is also called the statistical test method An innumerable number of processes can be listed the outcome of which is not determined and has probabilistic nature, but these processes obey statistical laws, so to obtain the result we have to make multiple similar tests, i.e. to use the MC method Because probabilistic processes are widely spread in nature, the MC ...

You can also see this page in Russian with using KOI8 (X Windows) or CP1251 (MS Windows) Cyrillic coding. The Laboratory supports the space TV experiments, mainly in the planetary exploration missions. ... Image Co-registration . ... PHOBOS mission - Martian satellites investigations. Phobos on the Martian limb, the image from Phobos-2 probe from 02/28/89. ... Russian Space Bulletin. ... Last modified at June,26 1997 Alexey Kuzmin: akuzmin@mx.iki.rssi.ru . Back to IKI home page ...