... User Guide ] Task: obsrms Purpose: Calculate theoretical rms for telescope array observations. Categories: image analysis OBSRMS - Calculate theoretical rms for telescope array observations. ... Key: jyperk Antenna gain in units Jy/K. Default=150 Jy/K. Key: antdiam Antenna diameter (m), and aperture efficiency can be used to calculate jyperk. ... Default=0,0.6 i.e. use jyperk value. ... Default=1,1 Key: nants Number of antennas in array. ... Default=0.88 Key: rmsphase RMS phase noise (degrees). ...

... Archives . ... Magnitude [Eqn] . ... Differential Emission Measures (DEMs) are a summary of the temperature structure of the outer atmospheres (aka coronae) of stars, and are usually derived from a select subset of line fluxes. ... is called the Differential Emission Measure and is a very useful summary of the temperature structure of stellar coronae. ... Tags: DEM , Differential Emission Measure , EotW , Equation , Equation of the Week , stellar coronae . ... Comment ( RSS ) | ... Chandra Blog . ...

Authors: V.A. Marsakov , Yu.G. Shevelev , . Journal: 1988, Astron Zh. ... Absolute magnitudes, metallicities, effective temperatures, surface gravities, distances, and tangential velocities are calculated for 5498 F stars with homogeneous data on uvby photometry and proper motion, and placed within 80 pc from the Sun. Components of space velocities, eccentricities of galactic orbits, perigalactic and apogalactic distances, and maximal remotness from galactic plane are presented for 1787 stars. ...

RATAN-600 radio telescope . ... In the "radio-Shmidt telescope" mode the antenna system the South sector of the main mirror with the flat mirror ("South+Flat") of the RATAN-600 radio telescope is used. ... The antenna system the South sector with the flat mirror. ... The flat and circular mirrors of the RATAN-600 form the basis of the system. ... In the case of antenna system "South+Flat" the planoid is flat mirror, the circular reflector of RATAN-600 is the second mirror. ...

... A2438 Date Received: 2008 -Sep-29 11:27:59 Technical Page Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Astronomy Extragalactic 36 Hours 1 hours Centimeter HCN absorption lines toward local gas rich galaxies We propose to observe centimeter HCN l-type absorption lines (J=4 and J=6) toward seven local gas rich galaxies, to study temperature and column density of dense molecular gas in these galaxies. ...

... Главная страница / Конкурсы / УкрАстроФото 2005 ;) . ... Случайная фотография . ... Комментарии: 2 . ... УкрАстроФото 2005 ;) . Участвовать, голосовать и коментировать, могут только зарегистрированные пользователи галереи. ... Найдено: 37 фотографий 5 страницах. ... nick007 ) . ... Фотографий на странице: . ... Все права на размещенные в галерее фотографии принадлежат их авторам. Запрещается использование фотографий без разрешения автора. ... Киевский клуб любителей астрономии "Астрополис" . ...

The ESA/ESO Astronomy Exercise Series 2 . The Distance to Messier 100 as Determined by Cepheid Variable Stars . ... The small variations in distance to the individual Cepheid variable stars in the Cloud are negligible compared with the much larger distance to the SMC. ... In this way Cepheid variable stars can be used as one of the 'standard candles' in the Universe that act either as distance indicators themselves or can be used to calibrate (or set the zero point for) other distance indicators. ...

... HST Phase II Proposal Instructions for Cycle 20 > Chapter 3: Fixed and Generic Targets > 3.3 Target Category and Target Description [Description] . ... Each target must be assigned a single primary category from Table 3.2 , and at least one descriptive keyword , chosen from the appropriate Table 3.3 through Table 3.9 (see Table 3.2 for which table is appropriate for each category). ... Table 3.3: Descriptive Keywords for STAR and EXT-STAR . ... Table 3.6: Descriptive Keywords for CLUSTER OF GALAXIES...

This page was created by the IDL library routine mk_html_help . ... mk_html_help . at the IDL command line prompt. ... to calculate CHIANTI line intensities and continua, to create a synthetic spectrum. ... WRITTEN : Ver.1, 7-Nov-01, Giulio Del Zanna (GDZ) and Peter Young (PRY) MODIFICATION HISTORY: V.2, 7-Nov-01, GDZ . Fixed a small bug (now the spectrum plot is always plotted within the widget), and modified the option to add continua. ... Added extended details in the ascii output spectrum. ...

Following designations of elements/ parameters are used in AMPLE. ... mean anomaly . ... Node . ... Apart conventional orbital elements AMPLE gives possibility to calculate for each minor planet the following often used functions: . ... MOID . ... To calculate MOID user should order the name or the number of the major or minor planet through dialog. ... To calculate CT user should order the name or the number of the major or minor planet through dialog as it is proposed for MOID calculation. ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... The algorithm and appropriate program for decametric radiosignal propagation conditions prediction for paths from 500 to 9000 km have been developed at ISTP SB on the basis of normal wave method (AltyntsevaB.I,Iliyin N.V., Kurkin V.I. and others //Decameters channel simulation on the base of normal wave method . ... Solar activity indices are chosen automatically from the prediction date from the database . ...

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . Login . See many more Astronomy Listings by: Category or Alphabet . ... Last Update July 27, 2006 . Listed Since July 15, 1998 . ... Web Site . http://janus.astro.umd.edu/astro/distance/ . ... Web . www.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 ...

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Travel to E-ELT Armazones . ... Weekend Visits to the ALMA OSF . ... Survey Telescopes . ... Star Clusters . ... Stars@ESO . ... ESO Science Newsletter . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... Antennas . ... Catch a Star 2013 . Catch a Star 2011 . ... ALMA antennas visible in the distance, amid the arid surroundings of the Atacama desert. ...

... Amorphous carbonaceous materials can show a great diversity of optical properties due to the variability in their microstructure. ... The differently pyrolized celluloses are representative for a suit of carbonaceous material ranging from strongly disordered (insulating) to graphitized (conducting) material. Figure: Complex refractive index of hydrogenated amorphous carbon prepared by pyrolysis (annealing) of cellulose at different temperatures. ...

Problem Set 2 - Cosmology­A3002 ­Due on or before November 7th. Can be sent via internal mail (Brian Schmidt, RSAA) use H0=70 km/s/Mpc, M=0.27, =0.73, w=-1 for all problems. ... Finish off your Monte Carlo simulation by selecting objects at random redshifts from 0<z<0.1, assuming that they have a mean absolute magnitude of M=-19.5 with a dispersion 0.2 magnitudes. ... Problem 2.1 (2 pt): In class we described the scale at which material can collapse in the Universe as the Jeans' length. ...

... The Round Earth . 8a. The Horizon . ... 9a. Earth orbits Sun? . ... What is the distance D to the horizon? ... Your line of sight to the horizon is a tangent to the Earth--a line which touches the sphere of the Earth at just one point, marked B in the drawing here. ... From the top of Mauna Kea on Hawaii, an extinct volcano about 4 km high (also the site of important astronomical observatories), the horizon should be about twice as distant, 226 km. ... One more: Distance to the horizon on Mars . ...

... What is the distance D to the horizon? ... Your line of sight to the horizon is a tangent to the Earth--a line which touches the sphere of the Earth at just one point, marked B in the drawing here. ... D = SQRT(2Rh) . ... SQRT(2Rh) = (SQRT(2R))(SQRT(h)) . ... Using R = 6371 km, SQRT(2R) = 112.88, giving . ... From the top of Mauna Kea on Hawaii, an extinct volcano about 4 km high (also the site of important astronomical observatories), the horizon should be about twice as distant, 226 km. ...

All stars derive their energy through the thermonuclear fusion of light elements in to heavy elements. High temperatures are required so that the mutual electrostatic repulsion of the protons in each fusing atomic nucleus is overcome. ... Elements with more protons in their nuclei require higher temperatures. ... This sequence is now shown in the animation below. ... First Step of the Proton-Proton Chain Narration . Second Step of the Proton-Proton Chain Narration . ...

... Bad Astronomy . ... Bad Astronomy : The seasons are caused by the change in the distance of the Earth to the Sun. ... The change in distance of the Earth to the Sun is a very minor player. ... Well, not completely wrong; certainly the Earth's distance from the Sun has something to do with the temperature, but it is a relatively minor effect. ... Basically, the temperature depends only weakly on distance changes; the temperature goes as the inverse square root of the distance of the planet to the Sun...

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