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. ...

Next: Limiting Energy Channels Input Up: *fit* - Fit Data Previous: Raymond Model . The model is a two-temperature Raymond thermal spectrum, low temperature range is 0.55 to 0.65 keV, high temperature range is 1 to 2 keV, element abundance table is cosmic, abundance of heavy elements (atomic number >2 ) is 50% of the value in the table. Note that 0.7 = log(5.0), specifies that the second component normalization will be 5 times the normalization of the first component. ...

... We consider stars with a constant (solar) initial chemical composition. Before the Roche lobe overflow, the components evolve as single stars (see for details LPP96). ... If the mass transfer onto a normal star occurs on a time-scale ten time shorter than the thermal Kelvin-Helmholz time for this star or a compact star is engulfed by a giant companion (e.g. as a result of the kick), the common envelope (CE) stage of the binary evolution is set in (Paczynski 1976). ...

... astro-ph . ... Whitespace-separated words are treated as AND ed. Show 10 50 100 articles per page in Full Compact mode . ... Quasar Variability in the Framework of Poissonian Models . ... It is shown that in this very general framework the well established anti-correlation between variability amplitude and wavelength can only be understood as an effect of an underlying spectral component which remains stable on long time-scales, and is redder than the variable component. ...

XMM­Newton CCF Release Note XMM­CCF­REL­208 OM Grisms Calibration: correcting count rate in extracted spectrum A. Talavera June 12, 2006 1 CCF components Name of CCF VALDATE EVALDATE List of Blocks changed XSCS flag OM GRISMCAL 0004 2000­01­01T00:00:00 --- Header keywords NO --- FLUX GRISM1 NO 2 Changes 2.1 UV Grism Flux Calibration SAS task omgrism extracts the spectrum from a grism rotated image. ... Such a corrected ISF (for the UV grism ­ GRISM1) is implemented in the new OM GRISMCAL 0004.CCF. ...

... User Guide ] Task: uvfit Purpose: Fit point sources to a given vis file. ... Key: stokes Normal Stokes/polarisation parameter (e.g. i,q,u,v,ii etc). ... Key: object This gives the object type that uvfit fits for. ... Key: fix This gives a set a flag parameters, one parameter per source. Each parameter consists of a set of letters, which indicate which source parameters of a component are to be held fixed. These source parameters are fixed by the initial estimates given by the `spar' parameter. ...

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. ...

... A frequently used procedure, alternative to the correction for the chromatic response, is to normalise the continuum to unity by dividing the observed spectrum by a smooth approximation of its continuum. This approximation can be obtained either interactively with the graphic cursor, or from a table (command NORMALIZE/SPECTRUM ) or by dividing the raw data by itself after filtering or smoothing. Median filtering and running average algorithms are well suited for this purpose (command FILTER ). ...

... MIPT Solid State Physics Department . ... Interacting Electrons in Normal Metals . ... The course is an introduction to interacting Fermi-particle physics and intended for future experimentalists. ... Hartree-Fock approximation. ... Linear reaction function. Calculation of density-density reaction function. Relation of density-density reaction function to compressibility of Fermi liquid and thermodynamic state density. ... Density-density reaction function of free Fermi gas in long-wave limit. ...

... Gaussian(3000,100) + 1.e10*BlackBody(6000)) >>> source.integrate() # returns integrated flux >>> source = BlackBody(6000).normalize(VMag(23.3)) >>> source = (Gaussian(3000,50) + ... 1.e10*BlackBody(6000)).normalize(Jy(3.1), ... trans=JohnsonV) Empirical Spectra · Can be treated exactly like analytical functions ­ Just has a lot of parameters! ...

... Астронет | ... планета Астронет | ... S. Alba Villegas; R. Freire Ferrero . ... New insights on late-A and early-F star activity . ... Formation and stability of the galactic shock waves . ... Dispersion of electromagnetic waves in active moving plasma . ... N. G. Bochkarev; A. N. Burenkov; A. I. Shapovalova . ... The luminosity function of quasars (active galactic nuclei) in a merging model with the eddington limit taken into account . ... About the euro-asian astronomical society . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Effect of each component of ejection velocity on descending nodal distance, as a function of true anomaly when transverse (black line); radial (red line); normal component (blue line) = 1 km s тИТ1 for (a) C/2012 S1 ISON (b) Marsden family comets. ... In this work, we do a mathematical study to check whether meteoroids ejected from this comet during its journey around the sun can produce spectacular meteor phenomena on...

... 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 . ...

spaceweb@oulu.fi - last update: 9 May 1998, 2010 UT (RR) . ... They were first discovered by Russell and Elphic (1978) and Haerendel et al. (1978), who studied the magnetic field measurements in boundary normal coordinates near the magnetopause, and found bipolar signatures in the Bn component (outward along the boundary normal): first outward and then inward (normal FTE) or the other way around (reverse FTE). ... 1996). ... Space Res. 18 , (8)151-(8)160, 1996. ... Space Physics Text Book of Oulu ...

Method of Calculating Cometary Orbits . ... A method of constructing a numerical theory of comet motion covering large intervals of time is presented. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), calculating cometary orbits, numerical theory of comet motion covering large intervals of time , radial component of non-gravitational acceleration , transverse component of non-gravitational acceleration , normal component of non-gravitational ...

... 2001 May 1 . Antarctica Hears Little Normal Matter in the Big Bang . ... Sunday, independent collaborations behind three such instruments announced evidence that overtones heard are consistent with our universe having only about five percent normal matter and 95 percent dark matter or dark energy . This amount of normal matter was expected were our universe to have undergone a particularly explosive early phase of the big bang known as inflation . ... About APOD | ...

... 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. ...

... The width of hydrogen lines is known to depend on the pressure in the photosphere, and then on the luminosity and effective temperature of the star. We have studied this dependence using the spectra of normal B stars from the databases by Jacoby et al., ... The resolution of Jacoby spectra (4.5А) coincides with the resolution of our BTA/UAGS spectra (4.4A). ... Dependence of full width FWZI of hydrogen lines on star spectral type and luminosity class. ...

... 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. ...

... Green and blue curves - CYGAM telescope (squares - no constraints on the angle a , triangles - a <0.5 0 ); red curve - EGRET telescope. Effective area versus photon incidence angle to relative the longitudinal telescope axis (squares - no constraints on the angle a , triangles - a <0.5 0 , spectral index g= 2). ... Angular resolution for normal to the axis X incidence versus source power law spectrum index (squares- no constraints on the angle a , triangles- a <0,5 0 ). ... CYGAM (PDF, 450 Kb) . ...