. Next: Large area surveys Up: Searches and surveys Previous: Finding periodic signals . љ . Dispersion smearing . Scattering . Limited period range . Sky background . Different telescope sensitivities . Scintillation . Acceleration in binary systems . Jon Bell . Thu Dec 19 15:15:11 GMT 1996

Next: Rapidly Rotating Stars Up: Discussion Previous: Relations . ... They attributed this to a mechanism which regulated stellar angular momentum through the accretion disk. ... While some of this may be due to sampling effects, the data seem to indicate that after a star loses its disk, either it continues its slow rotation for a period of time and then a rapid increase in rotation rate commences or spin up does not necessarily follow the loss of the disk. ...

Next: Signal-to-Noise Ratio Up: Restoration of FOC Imaging Previous: Pattern Noise . The appearance of the HST aberrated PSF is, by now, so familiar to everyone that I see no point in depressing people with more pictures of it. ... The second effect related to edge proximity, and already mentioned, is geometric correction. ... The effect of this variation in the secondary mirror despace on the HST point spread function is that it produces a radial movement in the structures in the halo. ...

... Obviously, the size of the cavern is of the order of the Schwartzman radius. ... Thus, consideration of the inverse effect of pulsar radiation on the properties of accreting plasma makes the ejection possible even when the Schwartzman radius is smaller than the capture radius. ... If the cavern radius , the condition at its boundary can be written as . ... Apart from magnetic dipole radiation, the cavern may also contain relativistic particles (which are also reflected from the cavern boundary). ...

... SCIENCE AND BUSINESS . Such a trifle as a starry night sky of largest observatories turned out to be a small change coin in commercial bargains for exclusive communal services in Russia, and for a few elite flats in penthouses in Ukraine. SCIENCE AND BUREAUCRATISM . ... Till in Russian) . ... Clericalization of science and education (Till in Russian). ... Researcher of the Sternberg Astronomical Institute, The Moscow University. ... SAI home page . ... October, 2008) . ... November, 2007) . ...

XMM-Newton CCF Release Note XMM-CCF-REL-320 RGS Bad Pixels C. Gabriel July 23, 2014 1 CCF comp onents Name of CCF RGS2 BADPIX 0033 VALDATE 2000-02-03T08:00:00 EVALDATE 2000-02-14T08:00:00 Blocks changed BADPIX XSCS flag NO 2 Changes This release covers a very short period (11 days) in the beginning of the mission, period in which the CCD 4 of the RGS2 instrument was malfunctioning (giving no signal at all), but not switched off, and included for commanding in the observation planning. ...

... the radiative transfer equation (RTE) for the randomly-irregular magnetized plasma has been derived on the base of general grounds of the multiple scattering theory . ... Solutions of several absolute tasks of the scattering theory have been obtained (on the optical depth of the ionospheric plasma layer, on the value of radio wave anomalous attenuation, on anomalous refraction, on the backscattered signal intensity for the source being placed within a plasma layer). ...

Next: Conclusions Up: Selection Effects Previous: Inconsistent (or Inconsistently Applied) . Another possible bias, present in this as well as all other surveys which use spectral indices based upon nonsimultaneous data in their selection process, is due to variability. ... In order to minimize the effect of non-simultaneous radio survey data upon our samples, we decided to expand the common definition of flat-spectrum radio sources to extend to (instead of 0.5). ...

... We study in this paper the effect of shock excitation of leaky and surface modes by the p-polarized electromagnetic wave incident on the rapidly ionized gaseous or solid layer. ... For example, if [pic] (solid density, multiple ionized plasma), the basic frequency [pic], [pic], [pic] we find, that the wavelength of leaky wave [pic] is in soft x rays band. ... If [pic] (low density gaseous plasma), the basic frequency [pic], [pic], [pic] we find, that the wavelength of leaky wave [pic] is in THz band...

Nonlinear tides in giant planets Adrian Barker DAMTP, University of Cambridge (formerly at CIERA, Northwestern) With: C. Baruteau, B Favier, P Fischer, Y Lithwick, G Ogilvie Introduction Motivation · Shortest period hot Jupiters (M ~ MJup, P < 10 d) have preferentially circular orbits => thought to be explained by tidal dissipation inside the planet (e.g. Rasio et al,1996) If so, what mechanisms are responsible? ... Linear theory contains uncertainties (e.g. Zahn, Ogilvie, Papaloizou, Ivanov, Wu). ...

... During and after the project, the student response was tremendous. ... I invite you to view what the class did with the terraforming project. ... These pages contain only portions of the entire project, since some of the presentations were purely verbal, and I was remiss in collecting all the speeches. The Mars Project student website . ... I think that it can be stressful to students to have such a large project to work on when they don't know what it's worth to them. ... previous page | ...

ON THE IMPACT OF THE GALACTIC ABERRATION ON VLBI-DERIVED PRECESSION MODEL Z.M. MALKIN Pulkovo Observatory Pulkovskoe Ch. ... Corrections to adopted precession rate are usually computed from the linear trends in long-term time series of celestial pole offset (CPO), which are the differences between the measured and the theoretical coordinates of the celestial pole. ... CONCLUSIONS We have estimated the impact of GA on parameters of precession-nutation model derived from VLBI observations. ...

The Wideband Arecibo Pulsar Processor Signal Processing Page . ... Raw Correlation . ... The WAPP uses custom digital hardware to create estimates of correlation functions from sampled data. The digital hardware used to estimate correlation function uses quantization to represent input . After creating an estimate of input correlation functions, the Wiener-Khintchine Theorem is applied to create estimates of input Power spectral density (PSD) and Stokes parameters . ... 3 Level . ...

This tip is yet another tip inspired by looking at Adobe Gallery Effects . ... Most of it looks like some simple bump-mapping and stuff like that. First, take an fairly interesting image, such as a picture of the earth. This tip works for any image, but the best looking results IMHO come out of using meaningful (non-random) images. ... U3: This is our bump map image (almost) . ... The last step is to apply U4 as a Bump-Map on U2. ... U3a: Your bump-map alternative . ... Tips Tricks Tutorials ...

EMI test using VXD3 R20 assembly Nick Sinev, University of Oregon Outline The problem Why we want beam test? ... What do we need for test ? Conclusion January 7, 2005 Nick Sinev, MDI workshop, SLAC 2 The problem As you already know from M.Breidenbach talk, we had observed Electromagnetic Interference (EMI) effects in VXD3 operation. ... January 7, 2005 Nick Sinev, MDI workshop, SLAC 3 Why beam ? ... January 7, 2005 Nick Sinev, MDI workshop, SLAC 12 ...

... A Force from Empty Space: The Casimir Effect . ... Measuring slightly over one tenth of a millimeter, the ball moves toward a smooth plate in response to energy fluctuations in the vacuum of empty space. ... The form and genesis of dark energy is almost completely unknown, but postulated as related to vacuum fluctuations similar to the Casimir Effect but generated somehow by space itself . ... NASA Official: Jay Norris. ... Publications with keywords: Casimir effect - dark energy - cosmology . ...

... They worked out that first magnitude was on average 100 times brighter than the 6th magnitude star. ... This formed an equation of apparent magnitude Mv which is: Mv = -2.5 log f + constant were f is the flux of that star f = ( counts/ exposure) The images that we worked on were taken by the Polar Bear Telescope. ... One of these being that it will be combined with standard stars, which will be used to identify the area of stars and to also help identify other stars within the image. ...

... The behaviour of the polarization efficiency (see Eq. ( 14 )) for non-absorbing and absorbing spheroids is shown in Fig. 11 for the case when a maximum polarization is expected (PF alignment, ). ... Figure 11: Polarization efficiency against for prolate and oblate spheroids with and , picket fence orientation, . The size/shape effects are illustrated. ... Figure: Polarization efficiency as a function of particle equivolume radius for prolate core-mantle spheroids with and , PF orientation, . ...

. The Doppler Effect . Spectroscopy . Wavelengths . The Electromagnetic Spectrum . Spectrographs . PPT Slide . What’s this got to do with velocities? . The Doppler Effect: . How does this affect the spectra? . The Maths . Example. Author: Paul Francis . Email: pfrancis@mso.anu.edu.au . Home Page: http://msowww.anu.edu.au/~pfrancis/astr1001/ . Other information: . Course Notes for ASTR1001 Astronomy

ESTIMATIONS OF EFFECTIVE HEIGHT, SIZE AND BRIGHTNESS TEMPERATURE OF SOLAR CYCLOTRON SOURCES A.N. Korzhavin, T.I. Kaltman Sp ecial Astrophysical Observatory of RAS, Saint-Petersburg, Russia arles@mail.ru The mo deling of microwave emission from a sp ot-asso ciated cyclotron source was done to refine the metho d of estimations of effective brightness temp erature, size and height ab ove photosphere in the pro cessing of RATAN-600 observations. ...