... ESO is building what will be the World's largest optical telescope array, The Very Large Telescope (VLT). The VLT Project organisation is responsible for the design and construction of the Unit Telescopes, including enclosures, optics, adapter-rotators and coating unit. ... Unit Telescopes Overview - This page is outdated, an update is in process. ... Secondary mirror (M2 Unit) - This page is outdated, an update is in process. ... Coating Unit - This page is outdated, an update is in process. ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Telescopes . LX850 Series . ... 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. ... LX70 Series . ... Meade's revolutionary LS LightSwitchтДв series of telescopes use advanced technologies to do what no other consumer telescopes have done before: take all the hassle out of using a telescope. ... Visual Accessories . ...

Custom Beamsplitter and AR Coatings for Interferometry K. Nylanda , C.A. Jurgensona , D.F. Buscherb , C.A. Haniffb , J.S. Youngb , J. Lewisc , R. Schnell a c New Mexico ... 2801 Unit E Broadb ent Parkway N.E., Albuquerque, NM 87801, USA ABSTRACT We report on final fabrication tests for the dielectric coatings for the Magdalena Ridge Observatory Interferometer (MROI) fringe tracking beam combiner ... Wavefront errors are the result of substrate or coating imperfections in the combiner optics. ...

SiD Tracking using VXD Nick Sinev, University of Oregon Plan Motivation Track reconstruction algorithm Performance for single tracks Does it have any limits ? With backgrounds To do Motivation Tracking in SiD is a challenge, especially pattern recognition. ... Limitations caused by reconstruction speed consideration In the presence of high number of background hits, number of 3-point combinations used as track seed became enormous if we consider all combinations. ...

The Navy Prototype Optical Interferometer . Articles | ... NPOI, Page 3 . Optical fibers on the beam combiner table guide the combined starlight to the electronics room. ... Electronics Lab . The scope of control necessary to make something like an Optical Interferometer work is immense. ... The instrument must process data fast enough to track air disturbances and correct them. ... www.astronomy.net . About Astronomy Net | ... dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... 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. ...

... The HDF Project. ... How to obtain the data catalogs. Observing logs and ancillary information. Technical information on the data reduction pipeline. Technical information on image registration and combination. Technical information on source detection and photometry. HDF Clearinghouse -- followup observations and analysis. ... Hubble Deep Field Academy -- Educational Resource for Middle School students . Hubble Deep Field South The Space Telescope Science Institute home page . ...

The APO 3.5-meter Remote Observing 2002 and Beyond . A Stray Light Analysis of the Apache Point Observatory 3.5-meter Telescope System . ... Telescope Control Computer (TCC) papers . MILT , the NSF proposal for the 3.5m telescope (no figures yet) . ... Collimation of the 3.5m telescope . ... Gives details of the coordinate conversions used to control the telescope, including the focal-plane conversions needed for positioning the rotator and guide camera and performing drift scans. ...

NATIONAL ASTRONOMY AND IONOSPHERE CENTER . ... Astronomy . ... Visitor Center . ... Optical . Lidar . At Arecibo we have a variety of optical instruments that we use to study terrestrial airglow emissions. ... This equipment is located in our Optical Laboratory, which is on site about 1000 feet from the center of the incoherent scatter radar. ... The various observational modes that are available are described in supplementary documentation for the Arecibo Observatory Optical Laboratories. ...

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. ...

Optical Communication Experiment using Very Small Optical transmitter with SLR station National Institute of Information and Communications Technology, Japan Space Communications System Laboratory Hiroo Kunimori and VSOTA TEAM Sep 24, 2012 WPLTN Technical Workshop@St.Petersburg, Russia Table of Contents Backgound:HODOYOSHI Project JapaneseHODOYOHI= Reasonable Reliability Engineering to develop series of 50kg Satellite. ... How to share wavelength communication beam and ranging beams. ...

Dick Ferris [0] Receiver architecture, correlator architecture, digitisation, beamforming, interference mitigation, data transport, cost and complexity are inexorably intertwined. A combination of baseband receiver, digital filterbank correlator and mixed delay and phase digital beamformers, provides a flexible and efficient solution. ... Data Growth & Compression In a 4k channel filterbank the word size necessarily grows by 6 bits in order to maintain the input dynamic range. ...

... Fitting the observed dependence includes calculations of the polarization cross-sections averaged over particles orientation and size distribution, their normalization and the comparison of obtained dependencies with Serkowski's curve representing observational data for a chosen star. ... Variations of the polarization factors with wavelength are shown in Fig. 16 for homogeneous spheroidal particles with PF orientation. ... The distinction between prolate and oblate spheroids is also clearly seen. ...

... The MMT optical spectra of SBS 0335-052W were obtained on 1996 January 19 with the Red Channel of the MMT Spectrograph. ... The linear scale is 1 = 263 pc at the distance to SBS 0335-052W of 54.1 Mpc. ... In Table 1, the observed line intensities and intensities corrected for interstellar extinction for SBS 0335-052W are shown along with extinction coefficient C (H ), observed flux of the H emission line, the equivalent width EW (H ) and equivalent width of absorption Balmer hydrogen lines EW (abs)....

The following papers summarize the characterization and technical performance of IBIS : . ... Characterization of Fabry-Perot interferometers and multi-etalon transmission profiles. ... Righini, A., Cavallini, F., Reardon, K. P., 2010, Astronomy and Astrophysics , 515 , A85, . ... The filter wheel is located between the two interferometers. ... The interferometers can be rapidly tuned, simultaneously, so to allow sequential scanning of the spectral lines of interest (see movie in IBIS Intro ). ...

Magnitude limit: f opt /f X set to identify ~ 75% of AGN . V ~ < 21: Chandra data products . V ~ > 21: New CCD imaging data . ... 2004), SDSS colors derived for Chandra sources from our NOAO Mosaic imaging plotted against log fx/fr in the 0.5-2 keV band. ... Clustered with stars at low fx/fr are galaxies that likely have little X-ray contribution from an active nucleus. ... Excellent separation of stars and AGN . ... cluster membership from galaxy colors . ... Images & Data | ...

MULTISCOPES . ... Modular Microscopes satisfy all your educational, medical diagnostic, and research requirements. ... To better match the diversity of your applications, the MULTISCOPE Series comes in more than ten standard models, capable of performing the most critical tasks of Brightfield, Phase Contrast, and Polarized Light microscopy. ... Modular Microscopes provide you with a choice of three easily interchangeable high-performance observation heads, all 360° rotatable for comfortable viewing. ...

... Colors of Sunlight . S-4A.Color Expts. ... Here is your opportunity to demonstrate the three-color theory by using your computer. I am indebted for this to Joe Burns , on whose color demonstration file it is based. ... You see below two tables with colored fields. ... blue . ... D0FBFF gives the intensity of the three colors which make up the background: D0 is the intensity of red , FB is the intensity of green and the second FF is the intensity of blue , the maximum blue you can get. ...

... Using a simple 2-D Gaussian Point Spread Function (PSF) on a constant (flat) sky background, I derive a theoretical photometric and astrometric performance model for analytical and digital PSF-fitting stellar photometry. ... The photometric performance is maximized when either the effective background area or the effective-background-level measurement error is minimized. ... An important, but frequently ignored, noise source is the uncertainty of the measurement of the effective background level ( )...

XMM-Newton Science Analysis System Page: 1 omthconv July 9, 2007 Abstract Converts OM tracking-history data into tracking-star count-rates time series 1 Instruments/Modes Instrument Mode OM TRACKING 2 Use pipeline processing yes interactive analysis yes 3 Description In order to perform accurate tracking throughout an exposure, software onboard the Optical Monitor(OM) selects n (up to 10) guide stars visible within the FOV and monitors their position and counts during the exposure. ...