... Archives . ... The PCA and ICA is used for separating mixed components with some assumptions. ... The need of source separation methods in astronomy has led various adaptations of decomposition methods available. ... I rarely come up with a paper which gathered and summarized component separation methods applicable to astronomical data. In that regards, the following paper seems useful to overview methods of reducing dimensionality for astronomers. [arxiv:0805.0269] . ... Chandra Blog . ...

A New Mass Model For The JVAS Gravitational Lens B1030+074. ... University of Manchester, Jodrell Bank, U.K. B1030+074 is a double image gravitational lens, which was dis- covered during the Jodrell Bank VLA Astrometric Survey (JVAS). ... HST WFPC2 observations have revealed the lensing galaxy, which lies close to component B. The redshifts of the lensing galaxy and the background source have also been obtained and are 0.599 and 1.535 respectively. ...

... The PSF image (after tapering/weighting) and weights image. ... Directory listing: total 145G -rw-r--r-- 1 whi550 at-astro 534M 2010-12-11 23:22 ASKAPsim.FLASH.cont.catalogue.dat - rw-rw-r -- 1 whi550 at-astro 50M 2010-12-10 15:10 ASKAPsim.FLASH.cont. image .restored.fits - rw-rw-r -- 1 whi550 at-astro 50M 2010-12-10 15:10 ASKAPsim.FLASH.cont.imagemodel.fits - rw-rw-r -- 1 whi550 at-astro 127M 2010-12-14 10:15 ASKAPsim.FLASH.cont. model .input.fits - rw-rw-r -- 1 whi550 ...

Text of these problems is available also in other languages : . ... What can one see in the Moon's sky more often - the Sun or the Earth? ... There are about of 250 millions of stars in the elliptical galaxy M32 (a satellite of Andromeda galaxy). ... The masses of Capella's components. ... You are proposed to estimate the masses of Capella's components, using our observational data. ... A galaxy's mass. ... Estimate the mass of FGC 1908 and compare it to the mass of our galaxy. ...

... 2008 December 1 . Massive Stars Resolved in the Carina Nebula . ... Explanation: How massive can stars be? ... Such was the case for two of the brightest objects visible in the open star cluster Trumpler 16 , located in the southern Carina Nebula . ... The Carina Nebula , home to unusually shaped dust clouds and the famous variable star Eta Carina , lies about 7,500 light years away toward the constellation of Ship's Keel ( Carina ). ... About APOD | ... A service of: ASD at NASA / GSFC . ...

... We have made observations of the Perseus cluster with the Westerbork Telescope at 610 MHz. ... Several newly detected sources are identified with cluster galaxies. ... No evidence is found for the existence of the previously reported ~ 65'x25' cluster halo, 3C 84B. Key words: radio galaxies - clusters - tailed radio sources buoyancy The Perseus Cluster of galaxies is one of the most fascinating systems accessible to extragalactic astronomers. ...

... 2009: . ... New Wolf-Rayet Type Star. ... It was discovered that the peculiar velocity of the star is about 50km/s, and that it was discarded from a young star cluster. ... Based on the observational data from the 6-m telescope and from other sources, it was shown with high reliability that chemically peculiar stars with strong depressions in their continuum energy distributions possess the magnetic fields and rotation periods 2 and 3 times larger, respectively, than the stars with weak depressions....

... Bright Spots Resolved in Occator Crater on Ceres . ... Credit Copyright: NASA , JPL-Caltech , UCLA , MPS/DLR/IDA Explanation: What created these bright spots on Ceres? ... Dawn is scheduled to continue to spiral down toward Ceres and scan the dwarf planet in several new ways that, it is hoped, will determine the chemical composition of the region and finally reveal the nature and history of the spots. ... Dwarf Planet, Bright Spot . Dark Craters and Bright Spots Revealed on Asteroid Ceres . ...

Orbital elements of binary components in a hierachical system can be fit to either the visibility data directly or to the separation and position angle data. ... Then use Data|Astrometry to read a previously prepared file ("zetuma.psn") containing the positional data. ... Semi-major axis = 8.4214471 . Semi-minor axis = 4.7663976 . ... We can now use the Thiele-Innes method to estimate the orbital elements from this apparent ellipse and the data, as implemented with the Util|Orbit button. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Lightcurve of HW Vir from images obtained using the Faulkes Telescope South, operated by Las Cumbres Observatory . The blue triangles show the difference between two stars whose brightness is constant. ... This shows the value of the Faulkes Telescopes in the follow-up observations of eclipsing binaries with the aim to detect and characterise additional circumbinary companions. ...

Role in the Universe IAU Symposium 209, 2002 M. Dopita, S. Kwok and R.S. Sutherland, eds. Near-infrared monitoring of the carbon star IRC +10 216 : A high spatial-resolution time sequence of dust -shell evolution G. Weigelt , T. Blocker, K.-H. Hofmann, A. Men'shchikov, J.M. Winters Max{Planck{Institut fur Radioastronomie, 53121 Bonn, Germany Y. Balega Special Astrophysical Observatory, Nizhnij Arkhyz, 35147, Russia The carbon star IRC +10 ... 2000, Tuthill et al. 2000). ...