Find Similar Abstracts . ... The velocity of clusters of galaxies relative to the microwave background. ... BACKGROUND RADIATION, GALACTIC CLUSTERS, MICROWAVE SCATTERING, VELOCITY MEASUREMENT, HIGH TEMPERATURE GASES, MICROWAVES, POLARIZED RADIATION, RADIAL VELOCITY, RADIO ASTRONOMY, THOMSON SCATTERING . ... Use: Authors Title Abstract Text Text Query with Keywords Return: Query Results Query Form Database: Astronomy Instrumentation Physics and Geophysics ABSTRACT QUERY USER FEEDBACK HELP ...

... Future seminars . P a s t seminars . ... Stochastic Particle Acceleration and the Problem of Background Plasma Overheating " . D.O. Chernyshov and V.A. Dogiel (P.N.Lebedev Institute of Physics) . ... It was concluded also from these investigations that it is problematic to produce emitting electrons from a background plasma by stochastic (Fermi) acceleration because the energy supplied by external sources in the form of Fermi acceleration is quickly absorbed by background plasma. ...

... Programme . ... Abstract: Centaurus A is the first system in which direct evidence for a strong shock associated with radio-lobe expansion has been found, and is the nearest and most dramatic example of a jet / environment interaction. ... I will discuss the implications of these results for particle acceleration at the shock, for Centaurus A as a source of TeV radiation and UHECRs, and for shock heating in nearby and more distant galaxies. go back . ...

Proceedings of the Particle Physics and Early Universe Conference (PPEUC). For this paper: postscript PPEUC CMB index 1 Introduction.. ... Nuffield Radio Astronomy Laboratories , University of Manchester, Jodrell Bank, Cheshire SK11 9DL, U.K. We use radiation emitted by the galaxy to probe the amplitude and spatial distribution of galactic free-free radiation. ... 2 Using to Trace Free--free Emission . ... Acknowledgements . ... PPEUC Proceedings . Fri Jul 25 11:50:21 BST 1997 ...

... HST . ... Home . ... Data . ... HST Peer Review Process . ... WFPC2 Home . ... Instrument Home . WFPC2 History . ... Calibration . Calibration Home . Calibration Plan . ... LRF Data . ... Data Analysis . Data Analysis Home . Data Analysis Library . ... Instrument Handbook . Data Handbook . ... ISRs . ... Dither Handbook . WFPC2 Reprocessing . ... Abstract: . Accurate photometry with the WFPC2 depends in part on accurate determination of the background level. ...

... Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Foreground emission and Cosmic Microwave background intrinsic anisotropies . ... Since its discovery the Cosmic Microwave Radiation (CMB) has been one of the pillars of modern Cosmology. ... Further development of this work is the application of already tested algorithms to disentangle the foreground emission from the CMB maps and the determination of the CMB intrinsic emission. ... Return to list of thesis topics ...

... This paper describes the main algorithms used by the Einstein Level One processing to create the exposure masks and the background maps for Einstein IPC images, and how these algorithms were recreated in the IRAF environment. Our goal was to recreate the algorithms used by the Level One Processing to create exposure masks and background maps for Einstein Image Proportional Counter (IPC) data (cf. sections 2.5 and 2.7 of Harnden et al. ...

... Radiation mechanisms of astrophysical objects: classics today . ... ABSTRACT BOOK is available. Русский . ... Abstract book . Conference program . Conference poster . Conference venue . Conference proceedings . ...

... Buchachenko A.L., Oraevsky V.N., Sorokin V.M., Chmyrev V.M., The model of seismo-ionospheric interaction and its application to the study of ionospheric earthquake precursors with use of alpha station. Abstracts. ... Sorokin V.M., Chmyrev V.M., Sinelnikov V.M., Yaschenko A.K., The physical model underground nuclear explosion and earthquake precursors space monitoring. ... Sorokin V.M., Chmyrev V.M., Yaschenko A.K., Strong DC electric field in the ionosphere related to typhoons and earthquakes. ...

... A routine to analyse regions in an input image and return information about it in a set of parameters . ... Use . ... Input . Source image . Background . Exposure . Source and background regions . Output . Input region centre . ... Source counts per image pixel . ... Background subtracted source counts . Background subtracted source count rate . ... Analyse an on-axis source . Use a fixed background value . Use a background image . Use an exposure map . ...

... Acceleration of particles in the vicinity of a massive black hole We propose a two-step mechanism for charged particle acceleration in the magnetosphere of a massive black hole surrounded by an accretion disk. Particles first gain energy by stochastic process during the accretion phase. It is shown that effective proton acceleration up to energies eV is possible in the turbulent magnetized accretion disk. ...

Title: A New Model of the Gravitational Lens 0957+561 and a Limit on the Hubble Constant . Authors: Norman A. Grogin , Ramesh Narayan (Harvard Univ.) ... Title: ROSAT/PSPC observation of the distant cluster CL0939+472 . ... Title: Interaction in the Bimodal Galaxy Cluster A3528 . ... Title: Cosmological Implications of Galaxy Cluster Evolution . ... Title: Galaxy Cluster Virial Masses and Omega . ... Matches 201 to 222 from a total of 222 matches for the search pattern galaxy cluster . ...

. On non-gravitational acceleration in Harrington-Abell comet motion due to Jupiter . O. F. Grigoryan 1 , Yu. D. Medvedev 2 . 1 Vologda State Pedagogical University, Vologda, Russia 2 Institute of Applied Astronomy, St. Petersburg, Russia Abstract: . No abstract Key words: . Very Long Baseline Interferometry (VLBI), celestial mechanics, non-gravitational acceleration, Harrington-Abell comet motion.

The Canadian Galactic Plane Survey (CGPS) is a major initiative to improve our understanding of physical states and interactions in the Interstellar Medium (ISM) in our Galaxy. In 1995 we set out to create arcminute-resolution images of the major constituents of the ISM. ... Based on the results of the first five years, the CGPS Consortium proposes a Phase 2, designed to probe new questions. ...

October 15, Sunday . ... Session 1. ... Chair M. Mingaliev . ... Valtaoja E. The problem of high-energy emission from AGN . ... Hovatta T. Long term radio time scales of Active Galactic Nuclei . ... Gorshkov A. Extragalactic source variability studies of complete samples with RATAN-600 . ... Volvach A. The combined radio and optical investigations of the intraday variability of active galactic nuclei . ... Riehokainen A. Multi-frequency observations of the polar radio structures . ... Chair Yu. ...

... Ipatov A.V., Majorova E.K., Korolkov D.V., Nizhelskij N.A., Timofeeva G.M., Stotskij A.A.. The antenna noise temperature of RATAN-600 radio telescope - analysis and possibility its decrease. XXII All-Union radio astronomical conference. Abstracts reports, Erevan, 1978. ... ХIV All-Union radio astronomical conference. ... Majorova E.K., Nizhelsky N.A., Trushkin S.A., Tsybulyov P.G. The noise temperature and the effective area of RATAN-600 radio telescope equipped with anti-noise screens. ...

... 319, P L1-L4 (1997). ... Article in PDF format (128 KB) . ... 319, P L9-L12 (1997). ... 319, P L13-L16 (1997). ... 319, P L17-L20 (1997). ... 319, P L21-L24 (1997). ... 319, P L25-L28 (1997). ... 319, P 729-736 (1997). ... 319, P 737-746 (1997). ... 319, P 747-756 (1997). ... 319, P 757-763 (1997). ... 319, P 764-780 (1997). ... 319, P 781-787 (1997). ... 319, P 788-795 (1997). ... Using the Earth orientation parameters to link the Hipparcos and VLBI reference frames . ... helpdesk@link.springer.de ...

Next: Imaging Polarimetry with NICMOS Up: NICMOS Data Calibration and Previous: The Photometric Performance of . ... NICMOSlook and Calnic C . ... Extracting spectra from a large number of NICMOS grism images requires a convenient interactive tool which allows a user to manipulate direct/grism image pairs. ... NICMOSlook and Calnic-C are two programs that were designed to take advantage of the fact that the NICMOS grism mode typically consists of taking both a direct and a grism image. ...

... The 7 and 15 um observations of the Galaxy obtained by the ISOGAL program offer an unique possibility to investigate and separate the different populations of stars in the Galactic Plane, in particular to study the population of low flux density YSOs which could not be detected with IRAS. ... The criteria are applied to five ISOGAL fields centered at l~+45 deg and b~0 deg, covering a total area of 0.504 deg$^2$. ...

The total radiative power output from the hot outer layers of six late-type stars (of different spectral types and luminosity class) is derived via an emission measure technique. This analysis was based on observational data from the spectral range 100A to 3000A obtained as a result of three separate satellite missions, i.e. Hubble Space Telescope, International Ultraviolet Explorer and the Extreme Ultraviolet Explorer. ...