BIB-VERSION:: AST-PP-v1.0 ID:: epreps.stsci//prep1202 ENTRY:: March 9, 1998 TITLE:: Accretion Disks in AGNs: UV and Optical Observations SUBTITLE:: AUTHOR:: Koratkar, Anuradha AFFIL:: (1) Space Telescope Science Institute 3700 San Martin Drive Baltimore, MD 21218 USA DATE:: December 1997 JOURNAL:: To appear in: SUBMITTED:: ACCEPTED:: OTHER_ACCESS:: COPYRIGHT:: Copyright 1997 The Association of Universities for Research in Astronomy, Inc. ... END:: epreps.stsci//prep1202 ...

... This thesis sets out to explain this observation by the presence of optical non-thermal synchrotron emission, connected with the relativistic jet that powers the radio emission in these quasars. ... We find that about 40% of the sources have power-law SEDs, while a similar number show evidence for two primary components: a blue power law and optical synchrotron emission. The blue power law is similar to the dominant component observed in the spectra of optically-selected QSOs. ...

... 88, Jan. 1983, p. 1-15. l. A survey of extragalactic radio sources made using driven declination scans is reported covering an area of about 0.07 sr to a limiting flux density of 35 mJy. The fast-scan survey was carried out at a galactic latitude greater than 17 deg with the NRAO 91-m telescope operating at 4.755 GHz, and the 480 sources detected were reobserved at 1.4 GHz with the National Astronomy and Ionosphere Center 305-m telescope at Arecibo. ...

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . ... Listed Since July 15, 1998 . ... 775) 246-5281 . ... 775) 246-5211 . Web Site . ... Web . www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

... Future seminars . ... Within the framework of the " Space weather " program, 25-year sets of observations of solar x-ray radiation, measurements of parameters of plasma and a magnetic field in the solar wind and variations of Dst index are analyzed with the purpose of revealing the factors rendering the greatest influence on development magnetospheric storms. ... The data on the other type of solar activity - coronal mass ejection (СМЕ) - cover only small part of a researched interval. ...

... A radio galaxy is a galaxy that emits an unusually big amount of energy at radio wavelengths. ... Inside of each galaxy with an active nucleus (radio galaxies are among them) there must be a system of a "central machine" responsible for the colossal amount of the emitted energy from radio to gamma ranges. ... Sometimes a radio source in an active galaxy may flare again if the needed conditions appear (a new portion of matter would fall into the furnace of the "central machine"). ...

Next: XMM_MISCDATA Up: CCF Components Previous: Appendix: List of valid Contents . While some relevant RGS calibration data are given in the general-purpose CCF components . ... Some information concerning the maintenance of RGS CCF files is given below, though more details are available in the release notes that accompany new file releases and other technical notes. ... Use of CCF components by RGS SAS tasks . ... Purpose . Functionality . Ground calibration . Maintenance procedures . ...

Find Similar Abstracts (with default settings below ) . ... Also-Read Articles . ... Parameters of the 41 Dra system components . ... 00/2001 . ... Stars: Binaries, Binaries: Fundamental Parameters, Binaries: Individual . ... 61B Based on spectral and speckle-interferometric observations of the system 41 Dra, model atmosphere parameters of the system components have been derived: component Aa - T eff = 6500K, lg g = 3.99, R = 1.87 R solar , component Ab - T eff = 6500K, lg g = 4.11, R = 1.61 R solar . ...

... The HST uses an onboard model of its orbit to perform in real-time various control functions relating to spacecraft operations and observation support. ... New coefficients for the ephemeris are updated every other day, and are archived as FITS keywords for each HST observation data set. Using these coefficients,an observer can perform a variety of calibration and characterization calculations relating to the orbital position and velocity of the telescope. ...

Общая Астрономическая Конференция > Практика > Астрономический наблюдательно-информационный портал > Хвостатые гостьи (все о кометах) > P/2010 V1-F (Ikeya-Murakami) _ PK10V01f - фрагмент Ф (component F) периодической кометы P/2015 Y2 (Ikeya-Murakami) = P/2010 V1 (Ikeya-Murakami) = 332P/Ikeya-Murakami .. ... Просмотр полной версии : P/2010 V1-F (Ikeya-Murakami) _ PK10V01f - фрагмент Ф (component F) периодической кометы P/2015 Y2 (Ikeya-Murakami) = P/2010 V1 (Ikeya-Murakami) = 332P/Ikeya-Murakami .. ...

... 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 . ...

... Radio emission at around 90 GHz from star-forming galaxies is expected to be strongly dominated by the free-free component due to ionising radiation from massive, short-lived, stars. We present high surface-brightness sensitivity observations at 90 GHz of the nearby star-forming galaxy Messier 66 with resolution of about 9 arcsec (corresponding to a physical scale of about 500 pc) and analyse these observations in combination with archival lower frequency radio and mid-infrared measurements. ...

... The DFS components : for each component, a short summary of its main functionalities. The DFS Group documentation repository . PSC 19000: general/overall DFS . ... PSC 13700: DFS/FLAMES interface . ... History of all DFS deliveries to Paranal and La Silla. The DFS delivery notes (notes describing the detailled content of a delivery to the mountain, and related installation instructions). ALL DFS Release Notes (notes describing the detailled content of a specific DFS component). ...

... LUMAM . ... HOME . ... MICROSCOPES . ... CAMERAS . ... Home Products Microscopes Lumam HT-45LU Trinocular Observation Head . HT-45LU TRINOCULAR HEAD . ... Every trinocular LUMAM includes three vertical adapters: the VA-V20LU focusing C-mount adapter for attachment of C-mount video/digital cameras, the VA-F20LU photo adapter for 35mm cameras – with adapter rings for cameras that accept T-mount, Pentax or C-mount lenses, and the VA-T1LU telescoping DIN standard eyepiece tube adapter (23.2mm). ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Sample fits to the SB2 observations of HD 22128 (top two frames) and HD 56495 (bottom two frames). Fits (smooth lines) to the observations (points) show the combined synthetic spectra, as well as the two component synthetic spectra. ... HD 22128 and HD 56495 are both double-lined spectroscopic binary systems with short orbital periods, which have been proposed to host magnetic Ap stars. ...

... This guide discusses the concept and use of Dynamic HTML, which includes style sheets, content positioning, and downloadable fonts. ... This document discusses each of the three components of Dynamic HTML, describes how to use them, and gives examples of the use of each one. ... Positioning HTML Content contains the following chapters: Chapter 7, "Introduction," introduces the concept of positioning HTML content and discusses the two kinds of syntax you can use to create positioned blocks of content...

... 2014 July 21 . Spacecraft Rosetta Shows Comet has Two Components . Image Credit: ESA / Rosetta /MPS for OSIRIS Team ; MPS /UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA . Explanation: Why does this comet's nucleus have two components? The surprising discovery that Comet 67P/Churyumov–Gerasimenko has a double nucleus came late last week as ESA 's robotic interplanetary spacecraft Rosetta continued its approach toward the ancient comet's core. ... About APOD | ...

Irregular phenomena in the Earth Pole oscillation process and temporal variations of geopotential Valery Bondarenko, Vadim Perepelkin s The observed irregular phenomena in the Earth Pole oscillation process are very variety. ... These phenomena indicated in the IERS data are the "abnormal" fluctuation of the Earth Pole coordinates which owing to changing of the geodynamical parameters gives negative result in interpolation and forecast of the first approximation mathematical model. ... Fig. ...

Peremennye Zvezdy", . ... Star Name: . GSC 3710-00312, USNO-A2.0 1425-04252279 . ... Variability type: . ... USNO-A2.0 1425-04252279 is located at the distance of 15?.7 from the X-ray source 1RXS J031707.9+572942, which is larger than the position error of the source (12?), but its hardness ratio HR1 = 0.03 0.29, typical of chromospherically active stars, and its character of variability allow us to assume that the star is related to the X-ray source. ... Eclipsing variability . Sine wave 1 . ...

Next: Star Formation Rate and Up: No Title Previous: Calculation of Evolutionary Tracks . To start calculations, we choose the distributions of the initial binary parameters: the mass of the primary ZAMS component, , binary mass ratio, , orbital separation a . ... whereas the mass ratio distribution is not. ... The zero assumption often made is that the mass ratio distribution has a flat shape, that is binaries with a high mass ratio occur as frequently as those with equal masses. ...