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. " The Arecibo Observatory is sponsored by the National Science Foundation. Any opinions, findings and conclusions or recommendations . expressed in this publication are those of the author(s) and do not necessarily reflect the views of the National Science Foundation."

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• Comets National Astronomy and Ionosphere Center (Arecibo Observatory)
• Astronomers Detect Coolest Radio Star National Astronomy and Ionosphere Center

Next: The Echelle Relation Up: Wavelength Calibration Previous: Wavelength Calibration . A preliminary step to the wavelength calibration consists of extracting the orders of the WLC image which can then be used to determine the dispersion relation in two steps: . ... Both methods are based on the echelle relation and therefore are not applicable if the disperser is not an echelle grating, as it is the case for EFOSC which involves a grism disperser. ...

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• Detecting and Identifying Arc Lines
• Wavelength calibration
• Sky subtraction and object extraction

... НЕПРЕРЫВНОГО МАТЕМАТИЧЕСКОГО ОБРАЗОВАНИЯ . ... Кружок ?Олимпиады и математика? ... Московская математическая олимпиада . Заочный математический конкурс . ... Устные математические олимпиады . Олимпиады по программированию . Математический праздник . Математические регаты . ... Математические бои . Олимпиада по геометрии им. И.Ф.Шарыгина . ... Программа ?Math in Moscow? Научные конкурсы . Творческий конкурс . ... График олимпиад . ... XXVII Математический праздник . ...

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• Center for Linguistic Documentation
• Moscow Center for Continuous Mathematical Education - Independent University of

... Институт прикладной математики им. М.В.Келдыша . БАЛЛИСТИЧЕСКИЙ ЦЕНТР . О Центре . ... Баллистический Центр Института прикладной математики им. М.В.Келдыша РАН . Баллистический центр (БЦ) ИПМ им. М.В. Келдыша создан по предложению С.П. Королева и М.В. Келдыша в 1965 году. На него были возложены работы по баллистико-навигационному обеспечению (БНО) управления полетом пилотируемых кораблей и автоматических космических аппаратов научного и народно-хозяйственного назначения. ...

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... M7 is one of the most prominent open clusters of stars on the sky. The cluster, dominated by bright blue stars, can be seen with the naked eye in a dark sky in the tail of the constellation of Scorpius. Light from a Extra Solar Planet . ... NGC 1316: After Galaxies Collide . ... A preliminary inspection indicates that NGC 1316 is an enormous elliptical galaxy that includes dark dust lanes usually found in a spiral. The Galactic Center Radio Arc . ... A Tether in Space . ...

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... In order to obtain a quantitative estimate of the accuracy and reliability of our data reduction procedures and results, we have performed a data reduction pipeline based on the following steps: i) define a set of simulated HST-like images with synthetic globular cluster stellar distributions, which provide the ``true'' data for comparison; ii) convolve these images with appropriate assumptions of PSF and noise in order to construct simulated `` observed '' ... It contains 470 stars. b) ...

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• COS Instrument Handbook
• Gaps in the Cloud Cover? Comparing Extinction Measures in Spiral Disks
• Herschel Key Program Heritage: a Far-Infrared Source Catalog for the Magellanic

... An interactive IRAF task for the analysis of Extreme Ultraviolet Explorer ( EUVE ) emission line spectra is presented. The line flux in extracted spectra may be measured by multiple techniques, including fitting individual lines. ... To aid in identifying lines, the positions of known lines may be marked on the spectrum during the fitting process. Also, model EUVE spectra may be constructed and overlaid using plasma emissivities and source emission measures supplied by the user. ...

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• The ROSAT RESULTS ARCHIVE: Tools and Methods
• ADASS 2003 Conference Proceedings
• EMSAO: Radial Velocities from Emission Lines in Spectra

... 2000 May 27 . M51: The Center Of The Whirlpool . Credit: N. Panagia ( STScI , ESA ), NASA . Explanation: In the center of M51 , a spiral galaxy 23 million light-years away, astronomers have identified a dense region of young stars. ... This 1996 Hubble Space Telescope image of its nucleus reveals the light from millions of stars, perhaps one tenth the age of the Sun, packed into the bright central region. ... About APOD | ... NASA Technical Rep.: ... A service of: LHEA at NASA / GSFC . ...

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• APOD: April 25, 1996 - In the Center of the Whirlpool
• APOD: 2002 July 7 - The Galactic Center Across the Infrared
• APOD: 2000 July 5 - The Galactic Center Across the Infrared

. The smallest supermassive black hole ever detected in the center of a galaxy has been identified using observations with Chandra and the 6.5-meter Clay Telescope. The host galaxy for the tiny heavyweight black hole is a dwarf disk galaxy called RGG 118, shown in an image from the Sloan Digital Sky Survey. The Chandra image of the galaxy's center shows hot gas near the black hole. X-ray: NASA/CXC/Univ. of Michigan/V. F. Baldassare, et al.; Optical: SDSS

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• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B9A75E71B-EC0F-4409-95A9-766C5F8C623E%7D
• What are typical star-to-star distances in globular clusters compared to
• NASA's Ames Research Center in Moffett Field, California | Astronomy.com

... CfA Home . HCO Home . SAO Home . ... Welcome to CfA . CfA History . ... Laboratory Astrophysics . Extreme Astrophysics . ... 617) 495-7210 . ... 617) 495-7044 . ... 617) 495-7265 . ... HEA Research . ... HEA Home Page . CFA/HEA Home Page . ... High Energy Astrophysics Division (HEAD) . Chandra X-ray Center . ... Chandra Cluster Cosmology Project . Chandra Multiwavelength Project (ChaMP) . ... Chandra-Planck Clusters Project . ... CfA Virtual Observatory Project . ...

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• *imcnts* - Radial Profile of an extended source at the field center
• Source Selection
• Statistics 310 2005-2006

This source is hiding behind our Galaxy at a distance of ~18 Mpc, located at a galactic latitide of 0 degrees. ... As we look towards longer wavelengths, 60 micron, to try and penetrate the Galactic Plane, we still see confusion from galactic sources. ... If the image seems some what confusing that is because the MOST is a continuum radio telescope and when it looks in the direction of our Galaxy it detects radiation from sources within our Galaxy and from sources that may lie behind our Galaxy. ...

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• ATNF Daily Astronomy Picture
• Multiple Phase Centers
• CENTERS

Star formation is often best manifested by bright H II regions.These are regions of hydrogen which have been ionized by ultraviolet photons which are emitted from massive stars (typically stars more than 20 times the mass of the Sun). ... A narrowband filter image centered on this wavelength will then readily reveal these H II regions and hence the current sites of star formation in a galaxy, The luminous blobs that can be seen here are all H II regions . ... NGC 3558 Visual . NGC 3558 Infrared . ...

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• U of O High Energy Physics Seminars
• The Three Planet System
• Astro-2 and the UIT Experiment

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... To improve the quality of ionograms and to carry out on automatic ionogram processing we have developed a special software, which can be arbitraly devided into the following main parts: . ... Ionogram processing software on the basis of image processing; . Interactive ionogram processing software. ... Here we present ionogram samples for different kinds of chirp sounding . ... Capabilities and samples | ...

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• East Siberian Center for the Earth's Ionosphere Research. Specific character
• East Siberian Center for the Earth's Ionosphere Research. VS data on-line
• East Siberian Center for the Earth's Ionosphere Research. SW radiosignal

I will present theresults from a deep, extended, planetary nebulae survey in a 0.5 sqdeg region centered on the brightest cluster galaxy NGC 4486 (M87) in the Virgo cluster core, carried out with SuprimeCam@Subaru and FLAMES-GIRAFFE@VLT. ... A substructure detected in the projected phase-space of the line-of-sight velocity vs. major axis distance for the M87 halo planetary nebulae provides evidence for the recent accretion event of a satellite galaxy with luminosity twice that of M33. ...

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• You are the NASA Goddard Space-Flight Center

... Since IRS 7 at the Galactic center was identified as a luminous red supergiant (Lebofsky et al. 1982), a lasting debate has been initiated whether the nucleus of the Milky Way galaxy had experienced a recent star formation episode. ... 1993). ... 1994). ... Tamblyn & Rieke (1993) and Schaerer (1994) proposed starburst models which would be able to account for a young stellar population at the Galactic center, although the origin of some peculiar hot stars still remains to be explained (Tamblyn et al...

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• Population synthesis of X-ray sources at the Galactic center
• Discussion and conclusions
• Population Synthesis of X-ray Sources at the Galactic Center

... Мировой Центр Данных . ... Мировая система данных МЦД в России и Украине English . ... Данные . ... в Мировой Центр Данных по солнечно-земной физике в Москве ! МЦД по СЗФ является регулярным членом Мировой системы данных Международного совета по науке. ... Наш сайт содержит информацию о МЦД по СЗФ в Москве, его архивах и базах данных, о данных в прямом доступе и о возможности поиска данных, об участии центра в научных проектах и программах, а также ссылки на другие сайты с геофизическими данными. ...

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• Index of /stp/data/cosmic.ray
• World Data Center for Solar-Terrestrial Physics, Moscow

PUL VLBI Analysis Center . ... IVS : International VLBI Service for Geodesy and Astrometry . ... An IVS VLBI Analysis Center at the Central Astronomical Observatory at Pulkovo of the Russian Academy of Sciences, also widely known as Pulkovo Observatory, has been organized in September 2006. ... The center is a part of the Pulkovo EOP and Reference Systems Analysis Center (PERSAC) . ... Results of VLBI data analysis can be found at Pulkovo EOP and Reference Systems Analysis Center (PERSAC) page. ...

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• Pulkovo EOP and Reference Systems Analysis Center (PERSAC)

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