Next: Conclusion Up: Interactive Deconvolution with Error Previous: IDEA: Methodological Principles . For illustration of IDEA, we present the deconvolution of an HST image of SN1987A because of its relatively simple structure (a bright core together with a well delimited extended object, the ring). ... We use a PSF obtained on a star on 1990 August 28 in the same telescope conditions as for SN1987A. We show in Fig. 1 the original image, and the solutions obtained with IDEA, RLM and MEM. ...

True Color Image Gallery: Galactic SNR | ... Left: raw image, binned by, 8 x 8, pixel(s) . Right: gaussian smoothed version of above (sigma = 2 pixel [in binned image]) Click left mouse button on hyperlink below to download file . All the FITS files in this page as TAR file . ... Images . ... PS File . FITS files . unsmoothed (raw/exposure) . smoothed . raw image (counts) . exposure map . ... Back to G34.7-0.4 Index . Chandra Supernova Remnant Catalog . ...

Next: Displaying Images Up: Spectral Line Data Reduction Previous: Computation . A few comments are in order when using the imaging task, invert , to create spectral cubes (more information on invert can be found in Chapter 13 ): . To conserve space, invert produces a single beam dataset for all planes of a cube. ... That is, invert usually insists that no channels of a spectrum are flagged before that spectrum can be used for imaging. ... The slop keyword takes two values. ... VELSW . ...

Next: Ionospheric Corrections in AIPS++ . ... Previous: AIRY: Astronomical Image Restoration in interferometrY . ... Calculate residual images for all facets (using 2-D transforms). Partially deconvolve individual facets and update the image model for each facet. ... The image in Figure 1 was made using the AIPS++ widefield algorithm with 225 facets. ... In calculating the residual image the residual visibility re-projection for the different facets can be estimated independently. ...

... A Radar Image of Planet Earth . ... Credit: NASA , JPL Imaging Radar Program Explanation: This image of Mt. Rainier, Washington USA, planet Earth , was produced by the Spaceborne Radar Laboratory which flew on the Space Shuttle Endeavour in 1994. ... During the early 90s, NASA's Magellan spacecraft was able to use radar imaging to produce similar high resolution maps of the surface of Venus . ... Publications with keywords: Earth - radar . Publications with words: Earth - radar . ...

... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... ESO . ... Survey Telescopes . ... ESO Supernova . ... Star Clusters . ... Stars@ESO . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... ESO 1-metre Schmidt telescope . ... Future Projects . ... This NASA/ESA Hubble Space Telescope image shows the positions of the past, present and predicted future appearances of the Refsdal supernova behind the galaxy cluster€а MACS J1149+2223 . ...

... Astrophysics Group . ... COAST . COAST Astronomical Results . ... Surface Imaging of Betelgeuse . ... This page highlights some astronomical results obtained with COAST over the years. These are listed in chronological order (most recent first). ... Measurements of cyclic variations in the angular diameter of Chi Cygni . ... The first infrared image from an aperture synthesis array . ... The images of Betelgeuse below were reconstructed from COAST data taken in early 2004. ...

... Any point-source whose centre lies within 12/binx pixels from an image edge (non sky-images) is flagged as as being close to an image edge. Any extended source that has a pixel adjacent to an edge (as determined by the source pixel map that omdetect constructs for each source) is also flagged as being close to an edge. Additionally, any source that is close to one of the four corners of the OM field of view is also flagged as being close to an edge. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Concept Spacecraft . ... Monthly Sky Notes . ... October . ... By admin September 30, 2011 Posted in: Human Exploration . Gemini Spacecraft: The red and gold spheres in the Equipment Module are propellant tanks and the red cylinder in the nose is the parachute pack. ... Image credit: NASA) . ... Amazingly in 2011, an outfit called Space Operations Inc proposed launching updated Geminis (rebadged as Eclipse spacecraft) for commercial clients! ...

... NRAO Home Image Gallery AGN Radio Galaxies 3C296 . ... This is a false-color image of the radio galaxy 3C296, associated with the elliptical galaxy NGC5532. Blue colors show the distribution of stars, made from an image from the Digitized Second Palomar Sky Survey , and red colors show the radio radiation as imaged by the VLA, measured at a wavelength of 20cm. Several other galaxies are seen in this image, but are not directly related to the radio source. ... Search the Image Gallery . ...

Acutance . ... Crane proposes a more useful measure of accutance. To measure acutance, first the extent of the edge is found by determining two point E1 and E2 where the gradient is very low. ... The acutance is given as . ... Image Edge Profile (IEP) Acutance can be measured by determining the edge profile at the normal to an edge boundary. where m is the mean derivative of the jth boundary pixel and f(i), b(i), i 1,2,3,4 .. are the foregraound and the background pixels along the normal. ...

... The TRACE images may be used without restrictions in publications of any kind. ... These two images, taken on 18 November 2000 at 15:54UT and 16:11UT, respectively, show such an event: the red circle in the image to the left shows a region where many loops are cooling, with bright loop tops (the intensity scales with the square root of the image to reduce the dynamic range). ... See also a collection of images related to the Sun, other cool stars, and solar-terrestrial effects . ... Images | ...