T Ant [A/H] = -0.0. P var, nonlinear elements: Max = 2436120.756 T Ant + 5.897915d*E + 4.80d*10^{-8}E^2 [00027]. ... 00000]. ... Brightness variations with AG Ant the orbital period probably due to variations of circumstellar AG Ant extinction. ... R Ara Min II 6.2. ... The data in [00002] reveal RR Tel current V-band variations with a small amplitude and nearly RR Tel the same period [00000]. ... V0340 Tel The data from [00002] do not confirm the tabulated period V0340 Tel [00000]. ...

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Peremennye Zvezdy ( Variable Stars ) 33 , No. ... I present the discovery of an eclipsing component in light variations of the known High-Amplitude Delta Scuti star GSC 1374-01131 based on the Catalina Surveys publicly available data. ... From a single night of their observations, the variable was classified as a HADS (High-Amplitude Delta Scuti) star, with the light elements: . ... The light curves of GSC 1374-01131 based on Catalina data, folded with periods of pulsations and eclipses. ...

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• XWare > APOD

... Multiperiodic. ... Type RRC with a twice shorter period is possible. ... Strong Blazhko effect. ... V2683 Oph | ... Porb = 0.063791d. V0354 Dra | ... MinII - MinI = 0.545P. V2817 Oph | ... MinII - MinI = 0.698P. V0810 Cep | ... MinII - MinI = 0.57P. V0429 Peg | ... MinII - MinI = 0.334P. V0460 Peg | ... MinII - MinI = 0.540P. V0881 Cep | MinII - MinI = 0.476:P. V0882 Cep | ... MinII - MinI = 0.518P. V0898 Cep | ... MinII - MinI = 0.44P. V0921 Cep | MinII - MinI = 0.429P. V0922 Cep | ...

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• http://www.sai.msu.su/gcvs/gcvs/nl81/nl81_part_1/81_1rem.txt

... SB, Porb = 55.9212d. V0745 Cas| ... Component B of the double system observed brighter than in the Hipparcos Input Catalogue. ... The variability may be due to the fainter component. ... Type ELL: is also possible. pi Cas| ... Variability type and spectral type (F2/F3Ib/II) do not agree. ... Variability type and spectral type (F3/F5II) do not agree. ... Variability may be due to component B. VZ Pic| ... Variability may be due to component B. V1377 Ori| ... SB, Porb = 9.073d. V0421 Cep|105091| ...

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... We present a project of an Information system on binary stars (ISBS). ... A first version of ISBS will contain astronomical data catalogues, related to observations of eclipsing binary stars. ... So, for statistical investigations it would be advisable to estimate fundamental parameters (such as mass and radius) for eclipsing binaries with unknown spectroscopic elements. ... Svechnikov M. A. 1986, The catalogue of orbital elements, masses and luminosities of close binary stars, Irkutsk, Irkutsk Univ...

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• Modelling Spectro-photometric Characteristics of Eclipsing Binaries
• Identification and Analysis of Binary Star Systems using Probability Theory
• Developing a Wavelet CLEAN Algorithm for Radio-Interferometer Imaging

... 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. ...

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• Terry Mosely's Bulletins

... A light curve decomposition tool ( LFIT ) developed by Keith Horne and Tom Marsh and its application on HST-data of the eclipsing dwarf nova IP Peg will be presented. ... Our LFIT code decomposes time-resolved spectral data into N components with parameterized light curve shapes, solving for the spectra of each component. ... To apply this algorithm to the HST and UBVRI eclipses of IP Peg, we add an ellipsoidal light curve for the companion star, and a more detailed description of the bright spot. ...

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• Absorption line spectra of the UV bright z=2.4 QSO HE 1122-1649
• HST Spectral Maps of Accretion Disks in Cataclysmic Binaries
• Gratings and Optical Elements

... Classes . Files . ... File List . File Members . components . SpectralComponents . Go to the documentation of this file. ... 00131 // The mask (if specified) means: use point if True. 00132 // group 00133 template class MT 00134 Bool fit ( const Vector MT sigma, 00135 const Vector MT y, 00136 const Vector MT x) { 00137 return fit (sigma, y, x, static_cast const Vector Bool * const (0)); } 00138 template class MT 00139 Bool fit ( const ...

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• casacore: components/SpectralComponents/SpectralList.h Source File
• casacore: components/ComponentModels.h Source File
• casacore: components/SpectralComponents/SpectralFit.h File Reference

... 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. ...

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• The Spectrophotometrical complex in Nasmyth-1 focus
• Age of the Universe
• Principal Components Analysis

Computer Ephemeris for 2015 from DE200/LE200. ... 2015 Sep 28 2 h 38 m 29.37 s Min(gamma) = 0.32922 t = time - 2 h 40 m Geocentric coordinates of the Sun: Right ascension = 121707.665 ... * t * -0.309 Parallax = 10126.569 + t * -0.032 + t * t * -0.018 Radius = 1644.515 + t * -0.009 + t * t * -0.005 Contacts of the eclipse : Begin Semishadow eclipse : 0 11.48 Begin Partial eclipse : 1 8.00 Begin Total eclipse : 2 14.70 Phase Maximum of eclipse : 2 48.31 End Total eclipse : 3 25.33 End Partial ...

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• Eclipse elements for Computer Ephemeris for 2014 (DE200/LE200).
• Eclipse elements for Computer Ephemeris for 2016 (DE200/LE200).

... Popper (1959) classified the eclipsing components as B8 V and B9.5 V. According to Wolff and Preston (1978) the primary component (B8) is a HgMn star. Spectroscopic elements were determined by Wyse (1936) from observations made in the years 1934 - 1935 and by Harper (1937) from observations 1935 -1936. ... Rachkovskaya (1985) according to Harper - 2.68 and 2.36 observed the star in the years 1967 -1968 and 1981 - 1982 and obtained the mass ratio q » 1. ...

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• http://jet.sao.ru/jet/~goray/838/v838ecl.htm
• http://jet.sao.ru/jet/~bars/BTMP/Barsukova_red.pdf
• http://mavr.sao.ru/hq/balega/PUBL_BAL/PUB_2007/AstBu_62_352.pdf

True Color Image Gallery: Galactic SNR | Magellanic Cloud SNR . ... parameters were derived from bright shell at N . Abundance of O-like element was set to zero asumming Typ1 I SN( Hughes et al., 1995 ). source=(xswabs * xsvraymond) . reduce chi^2 = 7.41398 . ... DataSet 1: 153 data points -- 144 degrees of freedom. Statistic value = 1067.61 . ... DataSet 3: 90 data points -- 76 degrees of freedom. ... Back to SNR J0519.5-6902 Index . Chandra Supernova Remnant Catalog . ...

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• Two-Temperature Raymond Model
• The AstroStat Slog principle component analysis
• Eclipse Lightcurves for the Hydrostatic Model

... 2.3 Establishing the Extragalactic Distance Scale . ... 2.3.2 The Second Rung: Distances to stellar clusters . ... 2.3.4 Distances to Local Group Galaxies . ... The Luminosity Function of Planetary Nebulae . ... 3.2.2 Clusters of Galaxies . ... 4.2 Evidence for Dark Matter as a Function of Scale Size . ... 4.3 Other Dark Matter Indicators for Galaxies . ... What is the nature of the large-scale distribution of matter in the universe as traced by the three-dimensional galaxy distribution? ...

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• Astro-2 and the UIT Experiment
• Historical Cosmologies
• Astronomy HyperText Book: Stellar Clusters

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. ...

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• Plastic forming and welding of optical elements for laser technologies and
• About RATAN

... Tonight's Sky . ... The Magazine . News . Observing . ... Community . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... elements . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

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• Clusters of monster stars lit up the early universe | Astronomy.com
• A cluster with a secret | Astronomy.com
• How the Big Bang forged the first elements | Astronomy.com

... Initial mass function and binary stars . ... The principal goal of this study is to show that the real shape of the initial mass function for low- and intermediate-mass stars differs from the observed one. In particular, comparison of radii of eclipsing binary components and single stars shows a noticeable difference for B0V-G0V components of eclipsing binaries and single stars of the corresponding spectral type. ...

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... The overall globular cluster population is divided by gap in the metallicity function at [Fe/H]=-1.0 into two discrete groups with well-defined maxima at [Fe/H]=-1.60?0.03 dex, and -0.60?0.04 dex. ... Clusters with extremely blue horizontal branches occupy a spherical volume of radius ~ 9 kpc, have high rotational velocities ( V rot =77?33 km/s), have substantial and equal negative radial and vertical metallicity gradients, and are, on average, the oldest group (the old-halo subsystem). ...

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• Vladimir Marsakov Publication List
• Population of Galactic globular clusters, figures
• Globular clusters with anomalously small masses, figures

... Contacts . 2012: . ... We refined the fundamental parameters of the components, the orbital periods, and the conditions of photospheric heating of the secondary component by the ultraviolet radiation of the hot component. ... The observations of the star clusters associated with ultra-luminous x-ray sources (ULXs) in four galaxies on the 6-meter and VLT telescopes have shown that all the ULXs are located within 200pc of very young star clusters (younger than 5 million years). ... Archive . ...

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• Galaxy sector, archive 2009
• Detection of radio pulsar pairs
• important_en

... We address a question if globular clusters (GC) in a protogalaxy could for some time evolve chemically as isolated systems, enriching themselves with heavy elements produced in first supernova events that follow initial star formation. We determine both the critical mass of a protoglobular cluster that is needed to retain the ejecta of the very first supernova, and the critical energy (i.e., number of supernovae) that is needed to expel the residual gas from a cluster of a given mass. ...

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... sas (gui-1.52.8) [xmmsas_20080701_1801-8.0.0] . Meta Index / Home Page After starting the SAS GUI you will see the components of the SAS GUI interface on screen. The interface consists of a menu , a tool bar , a task browser , a log browser and a status bar . ... Menu bar . File menu . Task menu . Custom menu . Style menu . Help menu . Tool bar . Selecting a task . ... Status bar . ...

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• Procedure