... 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: List of CCF Components Up: CAL_mosgainCorrect Previous: Output Contents . instrument, ccdChipID, ccdNodeID,FPAtemperature,observationStartTime,mode . ... FPAtemperature or EMAE temperatures in principle may change the gain of the pre-amplifiers, but TBD the temperature should be stable At the moment we have gathered evidence that the temperature does change and modifies the gain according to a component of the form . ...

Next: Accretion Disks with Up: StarsStellar Populations, Previous: Spectroscopic Analysis of . ... We present and discuss spatially resolved spectra of the accretion disk and the gas stream region as a function of distance from disk center, the spectrum of the uneclipsed light, and the radial temperature distribution in the ultraviolet. Keywords: Accretion disks, Cataclysmic variables . ... In this paper we report on the HST spectral mapping of the nova-like UX UMa. ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Telescopes . ... Superb optical performance coupled with time proven computerized pointing and tracking has made the LX200 ACF series a best-seller in the high-performance telescope class. ... General Accessories . ... Variable Projection Tele-Extender . ... The Meade 07348 Variable Projection Tele-Extender for LX Models requires the Meade 07182 eyepiece holder and offers different focal ratios while creating eyepiece-projection photography. ...

New RRC variables with an additional non-radial pulsation . PZ, vol. ... We present a new study of 14 known RR Lyrae variable stars from the Catalina surveys periodic variable star catalog. ... New Double-Mode RR Lyrae Variables III . ... We present a new study of 123 known RR Lyrae variable stars from the Catalina surveys periodic variable star catalog. ... According to these data, the stars are double-mode RR Lyrae variables, pulsating in the first-overtone and fundamental modes. ...

... The resolution used was R=19,000 (= 0.2-0.5 е) from 3600- 9000 е ABSTRACT H H Highly Variable Balmer Lines a) Inverse P-Cygni Profiles H and H present consistent IPC profiles in their emissions with red-displaced absorption components Recent detections of rapid variability in most lines observed (3600 to 9000 е, resolution = 0.2-0.5 е), in the enigmatic Herbig Be star ... However, a small number of HAeBe (11%) and T Tauri (7%) stars have been found to present IPC profiles in H (3)....

... 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 ...

... For NGC3516 we find that the X­ray warm absorption and the broad UV associated absorption features can be produced by the same absorbing material. ... Is it also true for NGC3516? ... 1996). ... Here we argue that the XUV absorption picture is consis­ tent with the presence of a highly ionized X­ray absorber and the current non­ detection of CIV and NV broad absorption lines (see Fig. ... Pre­1992: It showed broad, high ionization CIV and NV absorption lines and an X­ray ionized absorber (U ! ...

... Time delay determinations in astrophysics are used most often to find time delays between flux density variations in different spectral bands and/or lines in AGNs, and different images of gravitationally lensed QSOs. ... OB used an idea to take into account the known gravitational lensing time delay to get combined radio and optical light curves and then to use them for determination of the possible radio-from-optical time delay. ... Correction for change of time delay and radio flux. ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Governance overview . Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . ... Mopra radio telescope . ... Parkes | ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... The Variable Ca II Absorption in . Pictoris during 1998 . ... Variable absorption was usually present. ... The Ca II absorption in 1998 . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2011 March 26 . T Tauri and Hind's Variable Nebula . ... Explanation: The yellowish star near center in this remarkable telescopic skyview is T Tauri, prototype of the class of T Tauri variable stars. Nearby it is a dusty yellow cosmic cloud historically known as Hind's Variable Nebula (NGC 1555). ... About APOD | ...

... Chapter 2 Values, Variables, and Literals This chapter discusses values that JavaScript recognizes and describes the fundamental building blocks of JavaScript expressions: variables and literals. ... In JavaScript, regular expressions are also objects. ... This chapter describes JavaScript regular expressions. ... This chapter provides an overview of these statements. ... Chapter 8 Details of the Object Model JavaScript is an object-based language based on prototypes, rather than being class-based. ...

... Tonight's Sky . ... The Magazine . News . Observing . ... Magazine . ... Star Atlas . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... variable stars . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

Stationary Shock Waves. ... Influence of Medium Ionization on Shock Wave Propagation. Shock Waves with Decays. ... Results of Classic Theory of Radiation of the Electron Moving in Ion Field. ... Classification and Physical Features of Galaxies. X-Radiation of Coronae of Elliptical Galaxies and Clusters of Galaxies. ... Methods of Obtaining of Information about Physical Conditions and Components of Interstellar Medium. ... Ionization Fronts and Shock Waves in the Interstellar Medium. ...

... Flux density at 1 GHz (/Jy): 2720 . ... 1991, ApJ, 373, 146. ... ADS . ... VLA at 1.4 GHz and 4.8 GHz (both 1".3), for polarisation studies. ... VLA at 1.4 GHz and 4.8 GHz, for proper motion studies. ... 151 MHz observations for bulk expansion studies. ... Chandra observations, showing outer shock. ... Fesen et al. ... Spitzer observations. ... Chandra observations of rim. ... 2006, ApJ, 636, 848. ... 2006, ApJ, 647, L41. -ray line observations. ... Spitzer and Chandra observations for 3-D structure...

... ACCESSORIES . ... OEM COMPONENTS . ... ABOUT LOMO . ... MICROSCOPES . ... OEM OPTICAL COMPONENTS . ... MICROSCOPE APPLICATION GUIDE AND MODEL SELECTOR . ... LOMO stereo microscopes deliver crisp images for such demanding applications as industrial inspection, electronic component manufacturing, biological and botanical studies, classroom teaching, etc. ... LOMO manufactures the widest range of microscope accessories and components such as objectives, eyepieces, condensers, illuminators, stages, etc....

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. ...

... Return to the Kernel page . ... This article is part of the LWN Porting Drivers to 2.6 series . The 2.6 kernel makes extensive use of per-CPU data - arrays containing one object for each processor on the system. Per-CPU variables are not suitable for every task, but, in situations where they can be used, they do offer a couple of advantages: . Per-CPU variables have fewer locking requirements since they are (normally) only accessed by a single processor. ... DEFINE_PER_CPU(type, name); . ...

Follow-up observations with the University of Washington 0.76 m telescope at Manastash Ridge Observatory (MRO) of the Sloan Digital Sky Survey (SDSS) cataclysmic variable (CV) SDSS J170053+400358 are presented. ... They estimate that the dimming amounted to about 0.028 mag (using two comparison stars that were each about 4 mag fainter than HD 209458). only UW affiliated authors have been listed, student researchers are marked with an ``*'' . ... XTE J1859+226" UW affiliated authors: *Kevin Krisciunas. ...

New GCVS Versions for Three Southern Constellations Peremennye Zvezdy (Variable Stars) 27, No. ... We are currently working on a version of the General Catalogue of Variable Stars (GCVS) revised taking into account the new data accumulated since the 4th GCVS edition. ... It will contain all stars of the 4th GCVS edition plus a complete catalogue of the stars added to the GCVS in the Name Lists of Variable Stars Nos. ...