Next: Feature enhancement: local Up: No Title Previous: Feature enhancement: filtering . ... As a result, a common magnitude scale (contour lines on the maps above, or color scale on Fig.1) will poorly display the short-duration events in a signal. Normalizing each line of the map (fixed duration) so it has unit variance (in effect dividing the energy map by the mean energy spectrum) at each duration restores more details of small-scale activity (Fig. ...

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... 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 . ...

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• Two-Temperature Raymond Model
• The AstroStat Slog component separation
• The AstroStat Slog ICA

... Other Characteristics of the Sun: Variability of Rotation, Magnetism, Chemical Structure, Planetary System. ... Methods of Solar Magnetic Fields Measuring: Visual, Photografic, Photoelectric. ... Empiric Datas of Magnetic Fields in Photosphere, Chromosphere and Corona. ... Characteristics of Magnetic Field in Balanced Force Tubes by Potential and Forceless Field. ... Phenomenons in Active Region (Magnetic Field, Spots, Torches, Solar Prominences, Flares, Discharges. ... Magnetic Fields in Flares. ...

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• Practical Astrophysics
• Internal Structure of Stars

... April 3, 1996 . A Lucky Lunar Eclipse . ... Explanation: Tonight's full moon would normally washout the spectacle of Comet Hyakutake's lovely tail , even for those far from light polluted skies. ... Lunar eclipses are caused when the Moon passes through the Earth's shadow . ... Latest Comet Hyakutake images: APOD Hyakutake Archive , JPL , Fayetteville Observer-Times , NASA's Night of the Comet , ICSTARS , Jerry Lodriguss , ScienceWeb , Crni Vrh Obs. ... Archive | ... About APOD | ...

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• APOD: 2002 December 6 - Zimbabwe Solar Eclipse
• APOD: 2010 March 16 - Detailed View of a Solar Eclipse Corona
• APOD: 2005 August 8 - Mars to Appear Normal this August

We discuss images of M87 from 3.6 to 160 ЮМm obtained with Spitzer. As found previously, there is an excess in the far-infrared over a simple power-law interpolation from the radio to the resolved nonthermal features in the mid-infrared and optical. We show that this excess is most likely due to warm dust in the galaxy itself and that the properties of this emission component are similar to the far-infrared emission of normal giant elliptical galaxies. ... ADS ] . ADS Citation Query . ...

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• Eclipse Decomposition of Time-Resolved UBVRI and HST Spectra of the Dwarf Nova
• The Most Common Dust Features
• User Controlled Features

... Star Atlas . ... stars . ... If neutron stars don't produce energy from fusion, like normal stars, how can they shine in visible light? ... Although it is true that neutron stars have, for the most part, consumed all their internal thermonuclear fuel, they tap into other energy sources to produce light. Indeed, neutron stars are remarkably "resourceful" and employ a variety of physical mechanisms to make themselves visible.A newborn neutron star is incredibly hot ? ... Atlas of the Stars . ...

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• NASA's New Horizons to return to normal science operations after spacecraft
• Spectacularly bright object in Andromeda caused by "normal" black hole |
• Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets,

... Normally hidden by a thick, hazy atmosphere, tantalizing features on Titan's surface appear in this false-color view. ... Go outside tonight and see the total lunar eclipse. ... Here is one of the largest objects that anyone will ever see on the sky. ... A closer look at the Eagle Nebula, however, shows the bright region is actually a window into the center of a larger dark shell of dust. Through this window, a brightly-lit workshop appears where a whole open cluster of stars is being formed. ...

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GALFACTS MEMO: # 10 ALFA RFI Saturation Problem J. S. Dever 20 Decemb er 2006 1 Overview Observations made with ALFA can be partially or completely lost due to strong RFI saturating a component in the receiver chain. ... A determination of where the saturation is occuring should be made, and the problem solved. ... 1 Radar RFI 1.35 1.3 1.25 Power 1.2 1.15 1.1 16750 16800 16850 16900 Time 16950 17000 17050 Figure 1: Band average plot for 135 seconds showing the effect of Radar RFI in the continuum. ...

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• CIMA Software Components
• CIMA Version 2.2 Preferences

Next: Analysis in the Up: MIDAS utilities for Previous: Fourier analysis . For the detection of smooth signals, e.g. sinusoids, use either SCARGLE/TSA or AOV/TSA with bins. ... SCARGLE/TSA -- . Scargle sine model: This command computes Scargle's (1982) periodogram for unevenly spaced observations x . ... In this way, the command can be used to perform a CLEAN-like analysis manually by removing individual oscillations one by one in the time domain (see Roberts et al. ... AOV/TSA -- . ...

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• BCG with WR features and broad components
• Principal Components Analysis
• The Spectrophotometrical complex in Nasmyth-1 focus

Next: Results & Discussion Up: Coronal Hole Diagnostics out Previous: Introduction . ... The dates of the observations discussed here, their locations, pointing, slit sizes and exposure times are given in BTDW. ... Line fits are given by the dotted line. ... An estimation of the errors in the derived parameters was obtained using the GA-derived parameters as an input for a ``classical'' IDL-CURVEFIT procedure (Peter, 1999; Peter & Judge, 1999). ...

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• Observations with the Faulkes Telescopes
• Total Lunar Eclipse 16th May 2003
• sfit help file

... We present a computer program for modelling energy flux distribution and light curves of eclipsing binaries from far ultraviolet to infrared regions. The Roche model is assumed. Proximity effects of components (reflection of radiation and surface gravity darkening) are taken into account. ... Figure 1: The surface temperature distribution for Algol A-B system before (upper plot) and after (lower plot) correction for temperature due to the irradiation effect. ...

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• Developing a Wavelet CLEAN Algorithm for Radio-Interferometer Imaging
• LINN?, a Software System for Automatic Classification

... Here some data observed on the 6m telescope with IFP installed in the OLD focal reducer are presented. ... Mkn 3: velocity field . ... NGC 5252: [OIII] image . ... NGC 5252 was observed 23 Feb. 1998 in the [OIII]5007 emission line with CCD TK1024 as detector. ... We observed the ionized gas velocity fields of the spiral galaxies with two purpose. ... Restored velocity field of NGC 157 in the reference frame rotating with the pattern speed overlaid on the Ha image of the galaxy . ... NGC 4100 . ...

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• Emission molecular bands
• Spectral energy distribution

... The effect of the normal star on the compact magnetized component is largely determined by the rate and velocity of stellar wind at infinity . ... For Be-stars (i.e. those stars at the stage ``I'' whose mass increased during the first mass exchange), the wind velocity at infinity is taken to be equal to the Keplerian velocity   at the stellar surface . Thus, the lower stellar wind velocity leads to an effective increase of the captured mass rate by a secondary companion to such Be-stars. ...

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• Why do Radiopulsars not Usually Form Pairs with Normal Stars?
• Normal star evolution
• The Radiopulsar PSRB1259-63 - a Probe in the Stellar Wind Plasma

INTEGRAL observations of SS433 : new results Anatol Cherepashchuk Sternberg Astronomical Institute, Moscow University, Russia In collaboration with: Rashid Sunyaev ... Eleonora Antokhina, Nikolai Shakura, Darja Kosenko, Elena Seifina,Sergey Molkov (IKI) 1 Overview · Introduction · · · · Observations Analysis of hard X-ray spectra Analysis of hard X-ray eclipses Discussion and conclusions December 26, 2007 ...

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• http://hea.iki.rssi.ru/integral06/papers/F03_Cherepashchuk01-06Feb07_17:34:47.pdf
• http://hea.iki.rssi.ru/integral06/papers/G30_Balman01-05Mar07_11:54:53.pdf

XMM ­Newton CCF Release Page: 1 XMM ­Newton CCF Release Note XMM ­ CCF ­REL­273 EPIC MOS response S. Sembay, R. D. Saxton, M. Guainazzi 24 March 2011 1 CCF components Name of CCF VALDATE EVALDATE Blocks changed XSCS flag EMOSn REDIST 0093. CCF 1999­12­10 2000­10­03 CCD REDISTRIBUTION ­n NO EMOSn REDIST 0094. CCF 2000­10­03 2001­04­22 CCD REDISTRIBUTION ­n NO EMOSn ... The residuals between 1.5 and 2.0 keV have been investigated and found to be improved in all fits. ...

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• http://xmm.vilspa.esa.es/docs/documents/CAL-SRN-0324-1-0.ps.gz
• http://xmm.vilspa.esa.es/docs/documents/CAL-SRN-0208-1-0.ps.gz
• Procedure

adapted from Observe: Eclipses, published in 1979 by the Astronomical League and "Safe Solar Filters," by B. Ralph Chou, Sky and Telescope, August 1981) . ... Tape TWO pieces of film together into a sandwich, and tape this over the opening in the cardboard. ... The cardboard frame will act as a shade from the bright Sun, while you safely observe through the film sandwich. ... Undeveloped film is not safe. ... tape . ... At the end of one of the tubes, tape the aluminum foil, and make a tiny pinhole. ...

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• ASP: Guest Observer
• ASP: Astronomy in the News
• ASP: Australia?s 2002 Total Eclipse of the Sun

... G., Filippova A.S. Presented by: Filippova A.S Achievements · Refined model based on the celestial-mechanics methods is presented that is a generalized version of the previously developed basic model · Subtle effects are qualitatively explained based on the amplitude-frequency analysis and the computer numerical modelling of the oscillatory pole motion, where the key feature is the Chandler wobble 2 Basic Model of the Polar Oscillations ...

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• http://www.gao.spb.ru/english/as/j2014/presentations/iddink.pdf

... mag . ... arcsec . ... deg . ... 2015-03-18 22:47:47 . ... Observation . site code . ... site name . Pulkovo . ... mag(J2+J1)-mag(J4) . ... sensor . ... sensor info . 0.533 arcsec/px, FOV = 35x23 arcmin . ...

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... The variability of the spectrum of the optical component of the IR-source IRAS01005+7910 was discovered for the first time in the BTA spectra [1]. ... The spectral features include absorptions that form in near-photospheric layers, narrow envelope emissions, and emission-absorption profiles that form in photosphere-to-envelope transition layers (the wind). ... Discovery of spectral variation in the optical counterpart of IRAS01005+7910. ... Dashed line - envelope curve of all the SiII 5979 profiles ...

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• Galaxy sector, archive 2012
• Solar eclipse 2015
• RCJ0311+0507

Astronomy Discussion Forums . ... Total Lunar Eclipse May 15-16 . ... Post Message | ... A total Lunar Eclipse. On the night of May 15-16 the Earth will come between the Sun and the Moon casting a shadow that will slowly cover the Moon. ... The last total Eclipse was on a day where it snowed 10? all day. ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• S.T.A.N.O. Components Inc., AstroGuide Listing
• Total Lunar Eclipse, November 8-9 - an Astronomy Net Observation_reports Forum