The Restoration of HST Images and Spectra II Space Telescope Science Institute, 1994 R. J. Hanisch and R. L. White, eds. Application of the Pixon Based Restoration to HST Spectra and Comparison to the Richardson­Lucy and Jansson Algorithms: Restoration of Absorption Lines Athanassios Diplas, Edward A. Beaver, Phillip R. Blanco, Robert K. Pi#na, and Richard C. Puetter Center for Astrophysics and Space Sciences, University of California, San Diego, CA 92093­0111 Abstract. ... The FOS Spectrum of 3C273. ...

... Among the objectives of Principal Components Analysis are the following. dimensionality reduction; љ . the determining of linear combinations of variables; љ . ... identification of groups of objects or of outliers. ... Finding a set of principal axes allows the objects to be adequately characterised on a smaller number of (artificial) variables. ... Reduction of dimensionality is practicable if the first new axes account for approximately 75 % or more of the variance. ...

Next: Determination of atmospheric parameters Up: Optical spectrum of IRAS04296 Previous: Radial velocity of the . From comparison of observed and synthetic spectra of IRAS04296 we revealed some strong absorptional features whose positions coincide with known diffuse interstellar bands (DIBs) (Jenniskens et al., ... In Fig. 5 we illustrate the presence of DIB's by showing a spectral region of IRAS04296 . ...

... The PSF image (after tapering/weighting) and weights image. ... Directory listing: total 145G -rw-r--r-- 1 whi550 at-astro 534M 2010-12-11 23:22 ASKAPsim.FLASH.cont.catalogue.dat - rw-rw-r -- 1 whi550 at-astro 50M 2010-12-10 15:10 ASKAPsim.FLASH.cont. image .restored.fits - rw-rw-r -- 1 whi550 at-astro 50M 2010-12-10 15:10 ASKAPsim.FLASH.cont.imagemodel.fits - rw-rw-r -- 1 whi550 at-astro 127M 2010-12-14 10:15 ASKAPsim.FLASH.cont. model .input.fits - rw-rw-r -- 1 whi550 ...

... ASpect is spectrum analysis package being developed at ST ScI. We discuss the implementation of a GUI using the IRAF Object Manager, the ASpect task design, and the mechanics of performing a fit to a spectral feature with ASpect. ASpect is a spectrum and line analysis package being developed at ST ScI. ... For example, the fit library ``knows'' about the component and spectrum objects but a given spectrum or component object knows nothing of fitting. ...

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. ...

... 1 Piece Allocacoc 5 Outlets PowerCube Socket Original DE Plug Adapter - 16A 250V . ... Features: Creative magic cube design, 5 outlets . ... Package contents: 1 x Allocacoc PowerCube Original Socket, 1 x English User Manual . ...

XMM-Newton CCF Release Note XMM- CCF -REL-171 RGS Instrumental Flourine Absorption A.M.T. Pollock June 24, 2004 1 CCF components Name of CCF VALDATE List of Blocks changed XSCS ag RGS1 EXAFS 0004 1999-01-01T00:00:00 MgF2-P-CCD1 NO MgF2-P-CCD2 MgF2-P-CCD3 MgF2-P-CCD4 MgF2-P-CCD5 MgF2-P-CCD6 MgF2-P-CCD7 MgF2-P-CCD8 MgF2 ... Identical RGS1 and RGS2 data were analysed with response matrices with and without improved instrumental absorption by MgF 2 provided by the new RGS EXAFS CCFs. ...

... Recognition of Anomalous Events S. Monai 1,2 and F.Pasian 2 1 Osservatorio Astronomico di Brera Merate, Italy 2 Osservatorio Astronomico di Trieste, Italy Abstract. We present an original algorithm for the recognition of anomalous events in a CCD frame (i.e., cosmic hits, bad pixels etc.) ... Raw images, as read from a CCD, are often a#ected by some events which are revealed by anomalous pixel values, i.e., single saturated pixels or pixels at zero intensity (also named hot or bad pixels). ...

Automatic Classification of Sunspot Groups Using SOHO/MDI Magnetogram and White Light Images David Stenning March 29, 2011 1 Introduction and Motivation Although solar data is being generated at an unprecedented rate, the majority of sunspot classification is done manually by experts. ... This is to smooth the "white" areas in the magnetograms. ... Left: Inverse Magnetogram Right: "Opened" Inverse Magnetogram 6 Using the cleaned images, sunspot active-region "seeds" are obtain by thresholding. ...

.

The Seyfert-2 NGC 7674: . ... As part of a larger project to study Luminous and Ultra-Luminous IR Galaxies in both H I absorption and radio continuum at high resolution, NGC 7674 was observed using the VLBA, the phased VLA, and the 305-m Arecibo radio telescope. ... Figure 1 shows a moderate resolution continuum image of the innermost 1 kpc region of NGC 7674 at 1.38 GHz and 20 milliarcsecond (mas) resolution. ... No absorption is detected toward the components J, W, and SW. ...

... 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. ...

... The components have a steady phase but variations of 303 Gilcreek 2460 2272 2454 2448 2268 2442 2436 2264 1985 1990 1995 2000 2005 2390 2388 2386 2384 1985 1990 1995 2000 2005 Kashima 2132 2128 2124 2120 2116 Kokee-Kauai 1985 1990 1995 2000 2005 2390 2388 2386 2384 1985 1990 1995 2000 2005 1985 1990 1995 2000 2005 Onsala Westford 2240 2238 2236 Wettzell 1985 1990 1995 2000 2005 Figure 1. ... 2246 2244 2242 2240 2238 2236 2234 1985 1990 1995 2000 2005 BKG GSF IAA MAO IVS Figure 3. ...

... From the chain visibility point of view, it is very recommended to look at the Javascript movies , especially if the frame rate can be not regulated in your MPEG player. ... The non-CH-associated large-scale chains visible on the SOHO/EIT images at three wavelengths of 171, 195 and 284 as well as on the MLSO/HAO He I 10830 spectroheliogram of December 16, 1997. ... The SOHO/EIT movies at 171 and 195 show the chain dynamics on June 1-3, 1998. ... Javascript movie (230 KB), SOHO/EIT, 171 . ...

... 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 ...

Next: Galactic distribution and absolute Up: BASIC PROPERTIES Previous: BASIC PROPERTIES . ... RCB stars have a spectrum which resembles that of an F or G supergiant. The Balmer lines of hydrogen are unusually weak or absent, there are many lines of neutral atomic carbon and strong bands of molecular carbon (C and CN). ... Clayton 1996 ], [ Jeffery et al. 1996 ]). There is a small group of early-type stars reputed to show RCB-type light curves and also have weak Balmer lines. ...

... 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 . ...

... 2014 July 21 . Spacecraft Rosetta Shows Comet has Two Components . Image Credit: ESA / Rosetta /MPS for OSIRIS Team ; MPS /UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA . Explanation: Why does this comet's nucleus have two components? The surprising discovery that Comet 67P/Churyumov–Gerasimenko has a double nucleus came late last week as ESA 's robotic interplanetary spacecraft Rosetta continued its approach toward the ancient comet's core. ... About APOD | ...

... The variability of the spectrum of the optical component of the IR-source IRAS01005+7910 was discovered for the first time in the BTA spectra [1]. ... The spectral features include absorptions that form in near-photospheric layers, narrow envelope emissions, and emission-absorption profiles that form in photosphere-to-envelope transition layers (the wind). ... Discovery of spectral variation in the optical counterpart of IRAS01005+7910. ... Dashed line - envelope curve of all the SiII 5979 profiles ...