... Mindful of these biases, I can now explore the relations between the measured rotation periods and various other observables. The hypothesis behind monitoring stellar variability is that active stars have asymmetric spot distributions on their photospheres. ... They found that only stars with rotation periods greater than seven days show variations greater than 0.4 magnitudes at I. Bouvier et al . ... 1993a) demonstrated a relation between X--ray flux and spectral type in ZAMS stars. ...

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The Arcetri Spectral Code for thin plasmas . E.Landi M.Landini 1998, A , 133, 1 . CHIANTI - an atomic database for emission lines. ... E.Landi, M.Landini K.P.Dere, P.R.Young, H.E.Mason, 1999, A , in press . ... E.Landi M.Landini, 1998, A , 340, 265 . ... E.Landi, G.Del Zanna, E.R.Breeveld, M.Landini, B.J.I.Bromage, C.D.Pike, 1998, A , in press . ... M.Landini, A.Brkovic, E.Landi, I.Ruedi, S.Solanki, 1998, Sp.Sci.Rev., in press . ... E.Landi, H.E.Mason, M.Landini, 1998, Sp.Sci.Rev., in press . ...

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Next: Estimating the angle Up: Wavelength Calibration Previous: General Description . The wavelength calibration involves a physical equation, the echelle relation and regression analysis to achieve estimates of the dispersion relation. Provided that the echelle dispersion is performed with a grating, any echelle spectrum can be calibrated usually with four lines used as pre-identifications and a catalog of laboratory wavelengths associated to the calibration lamp. ... Echelle Relation) . ...

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STScI . HST . ... What is STScI . ... Missions . ... Data . ... Future Missions and . ... Missions Office . ... HST Peer Review Process . ... HST Overview . Overview . ... Servicing Missions . Phase I Proposing . ... Cycle 24 Announcement . Cycle 23 Results . ... Mid Cycle Submission . ... Phase II Cycle 23 . ... Retrieving HST Data . ... Data Analysis . ... HST Science Year in Review . ... NICMOS . ... Presentation from 2002 SPIE Meeting: Post-NCS Performance of the HST NICMOS . ...

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... All the information about the propagation of a given plasma wave mode is contained in the appropriate dispersion relation, which relates the angular frequency w to the wave number k (magnitude of the propagation vector k ). ... Phase velocity . ... Group velocity . ... Wave propagation can also be described using diagrams called phase velocity or wave normal surfaces , which give the variations of the magnitude of the phase velocity of plane waves with respect to the magnetic field direction: . ...

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A comparative study of type I and type II supernovae . ... Sternberg State Astronomical Institute, Moscow, U.S.S.R. (Received 26 November, 1985) . ... No significant difference between SNe I and SNe II has been found in their radial distribution and frequency of outbursts in spiral galaxies. ... The radial distribution of type Ia SNe in spiral galaxies is only slightly steeper than the one for SNe II, while SNe Ib/c are more concentrated towards the central regions. ...

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... The task also issues a number of housekeeping related messages and values and also writes several keywords to the EXPOSURE extension (the information is usually CCD-dependent and it is thus important that it is kept and propagated through the event file processing chain). ... Filter: the filter wheel position is derived from the position sensor potentiometer (housekeeping column F1122 contained in the main periodic housekeeping file PNPMH1 , HK mnemonic H_CE_FWSPOT). ...

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... Recent Topics . ... MAO main . ... The third-order space-by-time relation . ... Тема: The third-order space-by-time relation . ... The mass m experiences a gravity force toward the sun and . ... will experience the Coriolis force or Coriolis acceleration. ... differentiated space-by-time twice and discovered equation2. ... If one differentiates . ... time differentiation of space-by-time. ... third-order space-by-time relation. ... understand the third-order space-by-time relation. ... MAO NASU . ...

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.

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... The concepts of Fourier frequency and wavelet duration are obviously related. ... Among many sensible definitions, we chose to require that the peak of the wavelet mean spectrum should be matched with the singularity of the Fourier transform of the cosine wave. Then, it can be shown that the frequency of the cosine is related to the wavelet duration by the relation . ... The ambiguous definition of the duration of an event is common to the sizing of any object of irregular shape. ...

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Links on this page are to sites that hold information on the Sun , our nearest star . ... Big Bear Solar Observatory (BBSO) , California, USA. Mauna Loa Solar Observatory (MLSO) , Hawai'i, USA. ... Space Environment Center, Current Solar Images , Boulder, Colorado, USA. ... Solar Data Analysis Center, Latest Images , at GSFC, Maryland. ... NSSDC - National Space Science Data Center, Solar Physics (at GSFC). ... NSSDC - National Space Science Data Center, Space Physics (at GSFC). Back to Links ...

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... Scaling relations of galaxies: . ... 2007) . ... This research is now being extended to other clusters such as Hydra and Centaurus, by Ingo Misgeld . ... 2007 , Misgeld et al. 2008 and 2009 ) support a picture where the scaling relations of dwarf galaxies are shaped more by internal than external agents, given that colour-magnitude and magnitude-surface brightness relations agree quite well between the low-density Local Group environment and dense clusters like Fornax and Hydra. Misgeld et al. ...

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... Pre-university education . ... SSAU History . ... International relations . ... Thus, in different years the University entered into agreements with the universities of China (Harbin Politechnical Institute, Beijing Aerospace University , Beijing Politechnical University , North-West Politechnical University , Bradley University (USA), Sofia Technical University (Bulgaria), Stuttgart Technical University (Germany), Berlin Technical University (Germany), Carlow Technical ...

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... RelatedљPages . ... FITS-WCS and related software . Several implementations of the FITS WCS standards are available: . The WCSLIB software distribution (i.e. this library) may be obtained from http://www.atnf.csiro.au/people/Mark.Calabretta/WCS/ . ... The Kapteyn Package http://www.astro.rug.nl/software/kapteyn/ by Hans Terlouw and Martin Vogelaar. pywcs , http://stsdas.stsci.edu/astrolib/pywcs/ by Michael Droettboom. ... Gentoo, http://packages.gentoo.org/package/sci-astronomy/wcslib . ...

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... Bojan Nikolic web pages (r. 329) . Statistics for astronomy graduate course . Lecture hand outs 2008/9 . ... Materials . Astrophysical techniques graduate course . Lecture Slides . ... The search results are restrict to these pages only . ... Copyright 2005 -- 2016, Bojan Nikolic feedback welcome ...

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• Lectures and related materials
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. lsst.tcc љ 1.2.2-3-g89ecb63 . MainљPage . RelatedљPages . Namespaces . Classes . Files . љ All љ Classes љ Namespaces љ Files љ Functions љ Variables љ Typedefs љ Enumerations љ Enumerator љ Macros љ Pages . Related Pages . Here is a list of all related documentation pages: . Todo List . Generated on Mon Sep 14 2015 15:25:42 for lsst.tcc by љ 1.8.5

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... Institute for Cosmophysical Research and Aeronomy (IKFIA) (Yakutsk). ... IRE RAN (Moscow). Russian Foundation for Basic Research (Moscow). ... Institute for Remote Environmental Research AEN (Moscow) . ... Russian Federal Research Institute of Fisheries and Oceanography (Moscow) . ... Russian Federal Research Institute of Fishery and Oceanography KamchNIRO. ... Russian Federal Research Institute of Fishery and Oceanography. ... Russian Federal Research Institute of Fishery and Oceanography VNIRO. ...

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... The Cross-Quarter Days thus mark the middle of each season under our current system, or seasonal boundaries under the alternative system. ... Beltane / Bealtaine - Celtic bonfire festival May 4-7 2nd Cross-Quarter Day May 5 - Cinco de Mayo (Mexico) May 2nd Sunday - Mother's Day May last Monday - Memorial Day ( Decoration Day , officially May 30) June 14 - Flag Day June 3rd Sunday - Father's Day June 20-22 2nd Quarter Day - Summer Solstice June 21 - Litha (Norse/Anglo-Saxon for ...

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Instructions for Uploading Images and Video Related to the Columbia Accident . For anyone who has recorded video or taken photos that they believe may be of aid in the investigation of the Space Shuttle Columbia accident, NASA has established a special location on the Web where Internet users may upload their media files to be reviewed by NASA. ... Image file: johndoe_020203_0415pm.jpg . ... If you have any problems uploading your files, please e-mail Mike Koester . ...

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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. ...

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