... The spectrum of the brightest star, our Sun, shows several dark gaps perpendicular to the flow of it’s colours (figure 1). These so called spectral absorption lines where discovered in 1802 by the English scientist William Wollaston. ... Some stars as Pollux show a spectrum similar to that of our sun with strong Ca II and Fe II lines, others as Sirius or Vega show strong absorption lines of hydrogen, others, as Mira show very complicated spectra due to molecular absorption lines (see figure 5). ...
... ARC 3.5m | ARCES (Echelle) . ... 2.3 Taking Echelle Exposures . ... The ARC Echelle Spectrograph (ARCES) is a high resolution, cross-dispersed visible light spectrograph. ... Since the echelle calibrations are internal, calibration data can be taken even while other instruments are being used on-sky. ... Flat fields taken with ARCES require multiple exposures because the combination of lamp spectrum and instrument sensitivity yields far higher count rates in the red than in the UV/blue. ... Slit . ...
Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... Irvin M. Winer . ... Winer . ... The Irvin Marvin Winer Memorial Mobile Observatory, Inc. was named upon its incorporation in 1983 after Irvin M. Winer. The Winer Scientific Director, Mark Trueblood, met Irv at Wesleyan University in 1971, when Mark had just begun his graduate studies in physics and Irv had just completed his Ph.D. and was staying on as an assistant professor. ... 2013 Winer Observatory. ...
. General Information . Media Files . Participants . Timetable . Local Information . Photos . Back to the album list . Previous Click the image to view it in fullsize. Previous . St. Nicholas' Cathedral was restored in 1993-1999 years after demolition in 1936. During construction the appearance of the cathedral was brought as much as possible to the initial one.
. Authors . Problem . Method . Advises . Contact Analysis of an accuracy of CCD asteroid observations carried out by professional and amateur astronomers . An accuracy estimation of CCD asteroid observations contained in the Minor Planet Center Database and carried out in the years 1999 - 2006 is realized. About 20 millions individual positions of the Numbered and Unnumbered Minor Planets were tested by means of calculations of (O-C) residuals to derive "mean error of a single observation" for more than 400
... 000, 112 (2009) Printed 11 February 2010 A (MN L TEX style file v2.2) Analytical approximations of K -corrections in optical and near-infrared bands I1gor V. Chilingarian1 2 ,2,3 , Anne-Laure Melchior 1,4 and Ivan Yu. ... Received 2010 February 01; in original form 2009 August 14 ABSTRACT To compare photometric properties of galaxies at different redshifts, the fluxes need to be corrected for the changes of effective rest-frame wavelengths of filter bandpasses, called K -corrections. ... Table 1. ...
. РЕЧИ ВОЖДЕЙ . В.И.Ленин . Что такое Советская Власть . В.И.Ленин . О потребительской кооперации . В.Молотов . 22 июня 1941 г. Война . И.В.Сталин. Речь на параде Победы . Н.С.Хрущев . Выступление в ООН . Л.И. Брежнев . Речь на юбилей Победы . Архив хитов двадцатого столетия Музыка 50-60 годов Классическая музыка Народная и хоровая музыка Музыка МИДИ Публицистика Статьи на научные темы Обои и компьютерная графика Религии Викторины Игры Кунсткамера Для товарищей коммунистов Видеоархив КНИЖНАЯ ПОЛКА
... Automated Spectral Classification Using Neural Networks E. F. Vieira Laboratorio de AstrofТРsica Espacial y FТРsica Fundamental P.O.Box 50727, 28080 Madrid, Spain, Email: efv@lae#.esa.es J. D. Ponz GSED/ESA, Villafranca P.O.Box 50727, 28080 Madrid, Spain, Email: jdp@vilspa.esa.es Abstract. We have explored two automated classification methods: supervised classification using Artificial Neural Networks (ANN) and unн supervised classification using Self Organized Maps (SOM). ...
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Ссылки http://www.stecf.org/conferences/adass/adassVII/reprints/vieirae.ps.gz -- 90.0 Кб -- 12.06.2006 Похожие документы
... Our next meeting will be November 9th at 8 PM in Peyton Hall. ... Orion Launch Abort System Stops in Philadelphia A full scale mock-up of the Orion Launch Abort System (LAS) is hitting the road for a cross country trek of several museums and science centers. ... Ken Kramer November 2010 Amateur Astronomers Association of Princeton SnippeTs Planets NASA's Kepler spacecraft has discovered the first confirmed planetary system with more than one planet crossing in front of, or transiting, the same star....
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Ссылки http://www.princetonastronomy.org/newsletters/11_2010sidereal.pdf -- 1541.4 Кб -- 05.11.2010 Похожие документы
... Four types of galaxy environments are considered: clusters, centers of groups, other places in groups, and the field. ... In order to check whether the mean ages of the stellar populations depend on environment density monotonically, as the hierarchical par adigm predicts, in this work I consider four types of environment separately: the cluster galaxies, the brightest (central ) galaxies of groups, the secondranked group members, and the field galaxies. ... Group center SB(rs)0# 204 637 1996 Oct ...