... Visible Distribution of Galaxies. ... Features of Elliptical, Lens-Shaped, Spiral and Irregular Galaxies. Galaxies with Bar. ... Distribution of Surface Brightness of Surface and Spiral Galaxies. ... Color Characteristics of Galaxies. ... Methods of Galaxies' Mass Determination. ... Hidden Mass of Spiral Galaxies. ... Features of Dark Matter Distribution in E and SO Galaxies. ... The Whole Number of Galaxies and Their Density by the Results of Observation on the 'Hubble' Space Telescope. ...

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• Stellar Astronomy
• Practical Astrophysics
• Theoretical Astrophysics

... Observations of the Moon eclipse on 17.09.97 have shown the Moon details contrasts had decreased and the total radio brightness had fallen at all observed frequency range (from 10% at 1.38 sm down to 2.5% at 13 sm). The fall of the Moon radio brightness has been detected during the eclipse at decemeter waves for the first time. ... Radio emission of the Copernicus crater at 1.38 and 2.7 sm has been detected for the first time. ...

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• Spectral energy distribution
• Results scientific researchs LRS
• di_eks

... We are using Canadian Galactic Plane Survey l 74.2њ, -3.6њ < b This poster gives preliminary results for a full-fledged analysis of the gas properties and distribution of HISA features in the CGPS. ... where T ON and T OFF are observed brightnesses on and off the HISA feature, T S is the spin or excitation temperature of the HISA gas, tau is its optical depth, T C is the continuum intensity, and p is the fraction of H I emission lying behind the HISA feature. ... GIF | ...

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• HISA Poster for the 195th Meeting of the AAS, January, 2000
• HISA Poster for the 199th Meeting of the AAS, January, 2002
• HISA Poster for the 32nd Annual Meeting of CASCA, May, 2001

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

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• Evidence for Dark Matter

FEATURES OF THE HYDROGEN DISTRIBUTION AROUND LUNAR CRATERS PROCLUS AND KEPLER. ... In result of analysis of the data Lawrence and Feldman constructed the hydrogen distribution on the lunar surface [1]. ... However, the authors shown, that EN flux data features may be explained by other element abundance in the lunar soils, namely: Si, Ca, Gadolinium (Gd), Samarium (Sm) and Fe. ... Using of the Feldman's interpretation of the Lunar Prospector data [8], we constructed hydrogen distribution map (Fig.1). ...

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• http://selena.sai.msu.ru/Shev/Publications/m44_75_shevchenko_etal.pdf

... 81Trushkin+ The results of the multi-frequency radio observations of fourteen supernova remnants (SNRs) made with the RATAN-600 radio telescope in 1985 are reported. Flux densities of these SNRs are measured at least at two wavelengths: 31.3 and 7.6 cm. The radio spectra of some SNRs are precised. ... The radio sources detected inside or near the SNRs with the flux densities measured in the most sensitive 7.6-cm radiometer. The spectra of some point sources are discussed. ...

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• A 10-GHz Radio Continuum Survey
• Time series analysis in the frequency domain
• SNR observations list by S.Trushkin

... About ATNF overview . ... Governance overview . Australia Telescope Steering Committee . ... Parkes radio telescope . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... Finding the Bivariate Brightness Distribution of galaxies from an H I selected sample . ... A method is presented that will enable the bivariate luminosity/surface brightness distribution of galaxies to be determined from a relatively small H I selected sample. ... PICASSO - an automated galaxy finder . ...

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• SKAreport
• HIPASS Bright Galaxy Catalog
• An HI selected sample of galaxies -- The HI mass function and the surface

... According to the most popular cosmological paradigm, the greater part of the galaxy mass is accumulated in the dark matter halo. ... The polar ring galaxies (PRGs) reveal external rings or disks of gas, dust and stars rotating in a plane roughly perpendicular to the disk of the central galaxy. ... The shape of the dark halo in the model was chosen so as to achieve the best fit to the observed rotation of both galaxies themselves and their polar rings. ... The SPRC-7 galaxy. ...

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• Solar system sector, archive 2006
• Solar system scientific results 2003
• Detection of unique bright radio flare of X-ray binary

HUBBLE SPACE TELESCOPE DAILY REPORT #2698 PERIOD COVERED: 0000Z (UTC) 08/30/00 - 0000Z (UTC) 08/31/00 Daily Status Report as of 244/0000Z 1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED: 1.1 Completed Four Sets of STIS/CCD 8631 (Bright Quasar Close Lensing Search II) The Space Telescope Imaging Spectrograph (CCD) was used to expand the Cycle 8 second generation HST snapshot survey of bright quasars, optimized to find lenses with component image separations < 1". The observations completed nominally. ...

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• http://www.stsci.edu/ftp/observing/status_reports/old_reports_01/hst_status_04_13_01
• http://www.stsci.edu/ftp/observing/status_reports/old_reports_00/hst_status_10_19_00
• The Behavior of the Aromatic Features in M101 H II Regions: Evidence for Dust

Next: Pulsations Up: PHYSICAL CHARACTERISTICS Previous: PHYSICAL CHARACTERISTICS . The fundamental properties of RCBs may be deduced from their spectra at maximum light. ... The properties of a stellar atmosphere may be measured from both the large-scale features - the broad-band flux distribution - and the detailed spectrum of absorption lines. ... They show that, in general, hydrogen makes up less than one part per thousand down to less than one part per million of the stellar atmosphere. ...

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• Armagh Observatory
• Featured Image | International Year of Astronomy in Ireland | Astronomy 2009
• Bright Point Studies

... GSAOI Home . ... Science . ... It is widely accepted that the evolution of the large scale structure of the Universe is driven by dark matter. Understanding this dark matter continues to be one of Astronomy's great unsolved problems. Measuring the bulk motions of galaxies allows us to map the overall mass distribution of the Universe in a way that is independent of the luminous matter in galaxies. ...

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• Emma Kirby - Science

... Observatory . ... Science . ... Science Users Information > Data Handling and Products > Data Reduction FAQ > My data shows an extended, bright feature - what can this be? ... Observing Facilities . ... Observing with ESO Telescopes . ... Science Data Products Forum . ... ESO Data . ... You might also want to check http://www.eso.org/sci/observing/PublicSurveys/useful_links/OmegaCAM_images.html where we provide a collection of example OmegaCAM images, illustrating some special data features. ...

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• Stars and Galaxies
• ESO - The response curve leaves residual instrument features in my science.
• Redshift Distribution

PCA Calibration Status · Calibration of the Rossi X-ray Timing Explorer Proportional Counter Array Jahoda, Markwardt, Radeva, Rots, Stark, Strohmayer, Swank, and Zhang, 2006, ApJS, 163, 401 ­ Energy : residuals 1% (E 10 keV ); 2% (below 20 keV ) ­ Background: (excess variance)1/2 2%/channel on time scales 1600 sec · ~ 1% (2-10 keV ); ~ 0.7% (10-20 keV ) ­ Timing: ...

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• http://xmm.vilspa.esa.es/docs/documents/CAL-SRN-0273-1-1.ps.gz
• Dark features
• Intrinsic dispersion

... The source exhibits a mas-scale structure which, according to the USNO multi-epoch monitoring at 2.3 and 8.4 GHz over the period from 1994 July through 1998 April, undergoes considerable changes in the brightness distribution and positions of the major structural features. Our image is qualitatively consistent with the structural pattern of the source. ... We note a difference of ~90 in position angles of secondary components in our image and the 5 GHz VLBI image by Shen et al. 1998). ...

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... Bojan Nikolic web pages (r. 329) . ... We present a Bayesian approach to calculating the coefficients that convert the outputs of ALMA 183 GHz water-vapour radiometers into estimates of path fluctuations that can be used to correct the observed interferometric visibilities. ... Inference of Coefficients for Use in Phase Correction . ... Simulating Atmospheric Phase Errors, Phase Correction and the Impact on ALMA Science . ... Copyright 2005 -- 2016, Bojan Nikolic feedback welcome ...

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• G349.7+0.2
• CO in NGC 1530, aperture synthesis of a barred spiral
• ALMA Phase Calibration Techniques at the Cavendish Astrophysics Group

... A new IRAF task has been developed that automatically identifies linear (line-like) features in an image or set of images. ... In order to automatically detect linear features, the first step is to select pixels in the image (Fig. 1 , left panel) that fall within a given data value range. ... Another aspect of extended linear features is that the image space pixels that describe them are in some way adjacent to one another and have a minimum and maximum length. ...

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• Access to Data Sources and the ESO SkyCat Tool
• Modern CCD Observations of Moving Celestial Objects: Algorithms and Software
• Prototypical Operations Support Tools for NASA Interferometer Missions:

... Laboratory and theoretical modelling of the UV bump on the interstellar extinction curve is a very popular topic in dusty investigations. ... feature is illustrated by Fig. 10 where the profiles were calculated using the model of graphite spheres. Figure 10: Normalized extinction efficiencies for graphite spheres. ... The lower panel shows the summary extinction of two graphite spheres with radii and (from upper panel) taken in equal proportions. ...

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• Polarization properties (transmitted radiation)

... What are the fluxes of the stars? ... Volume sampled is no longer 4/3 pi r cubed due to curved space-time Want to derive population properties brightness, size, etc - as function of distance (therefore, cosmic time) But - biases in sample Biases NUMBER OF STARS VS MASS Eddington Bias: in astronomy, there are always more little faint things than big bright things. ... Suppose there are 10 stars of mass 0.5 and 100 stars of mass 0.4, and you have a 20 percent error on measuring the mass. ...

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• The AstroStat Slog spectrum
• The AstroStat Slog redistribution matrix file
• The AstroStat Slog Blog Archive Redistribution

... The main field of my investigations is stellar spectrophotometry. As a result of scientific activity of our group spectrophotometric catalog was created including energy distribution data on 900 stars in the range 3200-7600AA and 250 stars in the range 6000-10800AA (Voloshina et al., Spectrophotometry of Bright Stars, ed. I.N.Glushneva, 1982, Moscow, Nauka, in Russian). ...

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• MERLAN

Following are instructions to build and install the programs in this distribution. Make sure that you have all necessary tools for building executables. ... The automatic build process expects a configuration file called Config.local . ... The configuration file specifies the directory in which to install the binaries, as well as control over the generation of debugging code and reference clock support. ... Cleans out object files, programs and temporary files. make distclean . ...

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• APOD: 2003 March 17 - SN 1006: History's Brightest Supernova
• APOD: 2015 December 11 - The Brightest Spot on Ceres
• APOD: 2012 March 16 - Bright Planets at McMath-Pierce Solar Telescope