. S - slit unit; . M1, M2, M3 - collimator's mirrors; . E - mosaic echelle; . G - cross dispersion grating; . O - camera; . D1 - CCD.

... Its optical telescopes – the Europe's largest telescope of the mirror diameter 6 m BTA (Big Telescope Azimuthal) Medium-Size telescope of the mirror diameter 1 m ( Zeiss-1000 ) and the small telescope of the mirror diameter 0.6 m (Zeiss-600) – are at the altitude 2100 m above sea level 17 km away from the settlement Nizhnij Arkhyz. ... Nizhnij Arkhyz . SAO staff members live in the settlement Nizhnij Arkhyz at a distance of 25 km to the southward of stanitsa Zelenchukskaya. ...

RTT150 . Russian-Turkish 1.5-m Telescope . ... Telescope has two main foci (Cassegrain and Coude ) and allows to use six optical systems based on Ritchey-Chretien system with a common main mirror . At present scientific observations are being performed at the Cassegrain focus in main optical scheme with focal ratio of 1:7.7. ... flat . ... To use the Coude focus the removable flat diagonal mirror is also needed in the crossing point of declination axis and main optical axis of telescope. ...

... These are the filter transmission, the field of view (determined by the NICMOS optics external to the dewar, in combination with the HST mirrors), the reflectivities of the various external mirrors and the transmission of the dewar window. ... The sensitivity will obviously be affected by the pixel field of view. ... Finally, the optical efficiency will be degraded further by the reflectivities of the aluminum with MgF 2 overcoated HST primary and secondary mirrors. ... Primary mirror temperature . ...

OptInt PmWiki : MROI Fast Tip Tilt / Tech Meet 6 . ... Attendees: JSY, MF, ADR, XS, CAH, DMAW, EBS . ... With reference to error budgets . ... Selection of layouts and error budgets to present at CoDR . ... Dog-leg Transmissive . ... Zoom Transmissive . ... ADR: Refine selected layouts . ... Space to overhang table . ... ADR: Tolerancing of direct transmissive layout under table bending . ... Printable View of http://www.mrao.cam.ac.uk/projects/OAS/pmwiki/pmwiki.php/MROIFastTipTilt/TechMeet6) ...

... Penny Sackett presents John Anderson with a cтАж . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . ... Title: Penny Sackett presents John Anderson with a commemorative sculpture . Description: Image: Vince Ford . NOTE: All images are copyright and must not be reproduced or mirrored in any form without written permission. ... Penny Sackett presents John Anderson with a commemorative sculpture Image: Vince Ford . ...

... VLT: A New Largest Optical Telescope . ... 1.09.1996 . ... Credit: European Southern Observatory Explanation: What is the largest telescope in the world? ... But an even larger optical telescope is being built. ... The first of these telescopes should be completed in 1997, and all four should be completed and working together sometime in the year 2000. ... September 1996 . ... Publications with keywords: optical - VLT - telescope . Publications with words: optical - VLT - telescope . ...

... We present a new cooled grating near infra-red spectrometer designed to acquire spectra at the TIRGO telescope in the 0.9-2.5 micron region with a resolving power of 1000, equiped with a Rockwell NICMOS 3 detector. keywords: Infrared Spectroscopy :: NICMOS 3 :: TIRGO . The LonGSp (Longslit Gornergrat Spectrometer) project is part of the work that the Osservatorio Astrofisico di Arcetri is doing in order to build a new generation of instruments for the IR telescope of Gornergrat (TIRGO). ...

... Gondoin et al. paper submitted to SPIE 2000 (in PostScript) . ... In-flight calibration of the XMM-Newton Reflection Grating Spectrometers . ... Calibration of the first XMM Flight Mirror Module: I. - Image Quality . ... CCDs in X-ray Astronomy . ... X-ray performance of a qualification model of an XMM mirror module, pp.390-401 (Philippe Gondoin et al) . ... Reflection grating arrays for the Reflection Grating Spectrometer on board XMM, pp.450-462 (Steven M Kahn et al) . ... 1995) . ... Gondoin Ph.,...

... GCN 8471 | ... TITLE: GCN CIRCULAR NUMBER: 8516 SUBJECT: GRB 081102: MASTER refind and final results DATE: 08/11/11 15:50:10 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.Parkhomenko Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalognikh Ural State GCN Circ 8470, Lipunov et al., ...

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At Arecibo we have a variety of optical instruments that we use to study terrestrial airglow emissions. ... As a complement to the airglow instrumentation we also maintain a set of optical instruments, called lidars, used for "active" remote sensing of the atmosphere. That is, we generate our own source signal using lasers and measure the characteristics of the light scattered back from the atmosphere. ... An operations manual for the Optical Laboratories is currently under major revision. ...

The database contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants in the wavelength interval from X-rays to radio domain. ... References to some useful books and reviews on the subject (e.g. the classical handbooks edited by E.D.Palik) and links to Internet collections of optical constants and personal WWW pages with related software were also placed in the database. You have arrived at our welcome page. ...

Static Fourier spectrometers are often used for spectral measurements of the ionosphere emissions. There are two main advantages of Fourier spectrometers (FS) - large geometric factor and high spectral resolution; these parameters are two orders better than for grating spectral instruments. ... In scanning Fourier spectrometer optical and electric modulation of signal is used to avoid this problem, for static Fourier spectrometer there are no such ways. ...

... Image Quality of the VLT . Total Optical Control . First light for the ESO VLT unit telescope 1 occurred during the workshop. ... The image shown (Figure 1 ) here was obtained with the VLT on May 16, 1998, in red light (R band), i.e. while the mirror was still uncoated. ... In this diagram (FIgure 2), the measured image quality of the VLT UT1 astronomical images is plotted versus the ``seeing", as measured by the Seeing Monitor, a small telescope also located on top of the Paranal Mountain. ...

... September 1, 1996 . VLT: A New Largest Optical Telescope . Credit and Copyright: European Southern Observatory . ... Dubbed the Very Large Telescope (VLT), the European Southern Observatory (ESO) is building four 8.2-meter mirrors in Chile which together will act as a single telescope with a mirror diameter of over 16-meters. The first of these telescopes should be completed in 1997, and all four should be completed and working together sometime in the year 2000. ... About APOD | ...

... The predictive power of current models (the so-called meteor forecasting) has given us the exact timing of the Leonid storms of 2001 and 2002 to the nearest hour and are now used to predict the arrival times of major annual showers such as the Perseids . ... Towards this goal, the Observatory has installed a sky-monitoring system, consisting of one medium angle (MA) and two wide-angle (WA) video cameras linked to software designed to detect motion. ... Bright Taurid Meteor . ... Meteors on Mars . ...

... Two high school students from Texas and Louisiana are the winners of the 2012 Priscilla and Bart Bok Awards for their astronomy projects presented at the Intel Science and Engineering Fair in Pittsburgh, Pennsylvania in May. The awards were presented on May 18 by the Astronomical Society of the Pacific (ASP) in partnership with the American Astronomical Society (AAS), supported by funding from the National Science Foundation (NSF). ... The Bok prize is named for Bart and Priscilla Bok. ...

... Radio source identifications . The Web-server of the Special Astrophysical Observatory supports the mirror version of the Clusters of Galaxies database . At present only the data about radio sources in ACO clusters of galaxies are reasonably complete, while only restricted optical information is in our database. Later on, we also intend to include X-ray data and data about brightest cluster galaxies (BCG). ... ACO: radio optic ( for example, A0690 and " optic "), . ...

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . ... ESO 3.6-metre telescope . ... This major astronomical project, which aims at the construction of one of the world's largest optical telescopes by the 1990's will be further defined during forthcoming meetings of the various ESO technical committees. ... Technologically, the VLT will profit from experience with ESO's 3.5 metre New Technology Telescope (see ESO Press Release eso8602 of 21 January 1986). ...