Peremennye Zvezdy", . ... Min . ... 2MASS J16480306-6715178 . ... The variable star catalogued as ASAS 164802 6715.2 by Pojmanski (2002) was found to display two types of eclipsing variability by Pilecki and Szczygiel (2007). ... The comparison stars (identified in the finding chart) used were: . ... The data for Star A and B has been obtained using Comp Star 2 between HJD 2455709.956 and 2455710.089 and between 2455718.005 and 2455718.096. All other data was obtained using Comp Star 1. ...

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... Star Atlas . ... Study yields new variable stars . ... The study hopes to shed light on how a wide variety of stars vary over many years by monitoring the luminosity stability of normal stars, searching for changes in the periods and amplitudes of variable stars, and waiting for any flares or outbursts. ... If these contact binaries prove to be members of the star cluster instead of foreground or background stars, Wilkerson said, they will be useful as part of a study of how the systems evolve. ...

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... Observing . ... Home Education Workshops at Adorama Astronomy Workshop: Observing Variable Stars from the City ? February 15, 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Presented by€а Adorama €аFor the Amateur Astronomers Association of New York . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

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... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Many of the fields are spatially . ... These include a pulsating white dwarf which appears to have a hot companion, a number of stars with A-type spectra that vary on a period in the range 20 35 min. Our primary goal is the discovery of new AM CVn systems: we find 66 sources which appear to show periodic modulation on a time-scales less than 40 min and a colour consistent with the known AM CVn systems. ...

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... V838 Mon is a member of a new class of eruptive variables which appear as a peculiar novae having late K-M type spectra in their outburst. Before its outburst, it was a wide binary system of B3V type stars. ... The B3V companion was seen in the outburst in the UV spectrum taken with HST (Rauch et al., ... In the latest spectra, the light of B3V companion was predominating in the short-wave photometric bands. ... CCD blue frames of V838 Mon before the eclipse (left) and in the eclipse (right). ...

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Educator's Guide to Eclipses . ... In a solar eclipse you observe the Sun (using only safe methods, of course). ... In a lunar eclipse you observe the Moon. ... Because of the geometry described below, you can only view a solar eclipse when the Sun is up, and the Moon is nowhere to be seen. ... Eclipses occur when the Sun, Earth and Moon line up. ... In a solar eclipse the Moon passes directly in front of the Sun. ... In a lunar eclipse the Moon moves into Earth's shadow. ...

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Next: Disk Expansion and Up: The Epsilon Aurigae Previous: Vertical Structure of . ... We model disks with and without central holes and use a variety of midplane opacities and temperatures. ... The eclipse lightcurve was computed on a grid of 505 time steps separated by approximately 1.3 days, for a range of values of the disk scale height, , the inclination, i , and central hole radius, . The opacity parameter, approximately equal to the ``vertical'' optical depth of the disk, is: . ...

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ARCSAT ID NUMBER: AS05 DESCRIPTIVE TITLE: Time Series photometry of F/G/K + M dwarf eclipsing binaries PI: Leslie Hebb OBSERVER(S): Leslie Hebb UNCERTIFIED/UNTRAINED OBSERVERS: HWS students, Michelle Gomez and Betty Vasquez COLLABORATORS: Yilen Gomez Maqueo Chew CONTACT INFORMATION: Leslie Hebb , hebb @hws.edu, 206-618-9843 TIME REQUESTED: 1 week in April INSTRUMENT: Flarecam FILTERS: griz COMMENTS: no BRIEF SCIENCE JUSTIFICATION ...

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... astro-ph . ... Whitespace-separated words are treated as AND ed. Show 10 50 100 articles per page in Full Compact mode . ... Quasar Variability in the Framework of Poissonian Models . ... It is shown that in this very general framework the well established anti-correlation between variability amplitude and wavelength can only be understood as an effect of an underlying spectral component which remains stable on long time-scales, and is redder than the variable component. ...

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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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... Stars . ... Cepheid variable stars have been known since the 18th century. ... Regularly brightening to a peak over days, weeks or months before fading these variable stars were remarkable curiosities to astronomers in past centuries.€а The term Cepheid is taken from the star Delta Cephei in the constellation of Cepheus, which was identified as variable€а in 1784 by the teenaged prodigy John Goodricke (1764-96). ... Tweets that mention Cepheids: Inconstant Stars which break the rules | ...

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Reciprocity relation in checking calculations of the optical properties of non-spherical particles V.G. Farafonov St.Petersburg University of Aerocosmic Instrumentation, St.Petersburg, 190000, Russia and V.B.Il'in Astronomical Institute, St.Petersburg University St.Petersburg, 198504, Russia ABSTRACT There are many methods to solve the problem of light scattering by non-spherical particles , but only the separation of variables method ( ... Michel B., Farafonov V.G. (2000) J. Quant. ...

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This module provides the ability to set environment variables based upon attributes of the request. ... The mod_setenvif module allows you to set environment variables according to whether different aspects of the request match regular expressions you specify. ... BrowserMatch . ... Syntax: BrowserMatch regex env-variable [= value ] [ env-variable [= value ]] .. ... Module: mod_setenvif . ... The BrowserMatch directive defines environment variables based on the User-Agent HTTP request header field. ...

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... During the analysis of the surveys carried out on RATAN-600, it was found that almost one fifth of the detected sources shows significant radio flux variations. ... We used the data from "Cold" radio surveys carried out with RATAN-600 in 1980-1994 to search for radio sources with significant flux variability. ... On possibility of detection of variable sources using the data of Cold surveys carried out on RATAN-600. ... Detection of Variable Sources Using the Data of "Cold" Surveys. ...

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... What's new . ... The new version of the General Catalogue of Variable Stars (GCVS4.2) revised taking into account the new data accumulated since the 4th GCVS edition for the constellations: Canis Minor, Capricornus The new version of the GCVS ! ... The new version of the General Catalogue of Variable Stars (GCVS4.2) revised taking into account the new data accumulated since the 4th GCVS edition for the constellations: Apus, Cancer, Canes Venatici and Canis Major The new version of the GCVS ! ...

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... EDITOR Sets the editor that will be used by other programs such as the mail program. PAGER Sets the pager that will be used by programs such as man to display man pages. PATH Specifies the directories that the shell is to look through to find a command. ... PRINTER Sets the printer to which all output is sent by the lpr command SHELL Sets your default shell. TERM Sets your terminal type for programs such as the editor and pager. TZ Sets the time zone you are in. ...

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... Pulsars offer a variety of observables for study of interstellar scattering. Observations of scattering of nearby pulsars and intra-day variable quasars point to the existence of a component of the interstellar medium (ISM) which has properties quite different from the more distant, diffuse ISM. ... The time series of electric field emitted by the pulsar is convolved with an impulse-response function due to scattering, when sampled at the observer plane [1]. ... Nearby interstellar scattering. ...

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INTEGRAL observations of SS433 : new results Anatol Cherepashchuk Sternberg Astronomical Institute, Moscow University, Russia In collaboration with: Rashid Sunyaev ... Eleonora Antokhina, Nikolai Shakura, Darja Kosenko, Elena Seifina,Sergey Molkov (IKI) 1 Overview · Introduction · · · · Observations Analysis of hard X-ray spectra Analysis of hard X-ray eclipses Discussion and conclusions December 26, 2007 ...

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Welcome to Sergei Shugarov Home Page . Cataclysmic Variables Investigator . ... Cataclysmic Variable Star Home-page: http://cataclysm.sai.msu.ru) . ... Ikeya-Zhang Comet ephemeris, 2001-2003 . ... The Astronomical Conferences: . ... 31 March - 3 April 2004. ... 2004 . ... 2003 Conference in Gettingen, August 2001 . ... Conference on Variables Star, Odessa, August 2001 . Russian Astronomical Conference, August, 2001 Saint-Peterburg . Conference of Nova Star, Spain, Sitges, 20-24 May, 2002 . ...

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Copyright (Unpublished--all rights reserved under the copyright laws of the United States), U.S. Government as represented by the Administrator of the National Aeronautics and Space Administration. No copyright is claimed in the United States under Title 17, U.S. Code. Permission to freely use, copy, modify, and distribute this software and its documentation without fee is hereby granted, provided that this copyright notice and disclaimer of warranty appears in all copies. ...

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