Adaptive Optics Nicholas Devaney GTC project, Instituto de
... • Na laser guide stars (H=90km) plus NGS (H=) • Na laser guide stars plus Rayleigh guide star (H<30km) plus NGS (for global tip-tilt). • Na laser guide stars plus Rayleigh guide stars at different ranges plus NGS ...
... • Na laser guide stars (H=90km) plus NGS (H=) • Na laser guide stars plus Rayleigh guide star (H<30km) plus NGS (for global tip-tilt). • Na laser guide stars plus Rayleigh guide stars at different ranges plus NGS ...
1985e - Astrophotography with small telescopes
... heavenly wonders to friends. Many new friendships are made each year at the Conference, often under these dark skies, where faces are not seen and we learn to recognize the voice. Here is a place where astronomy is both enjoyed and shared. I turned and started walking back toward telescope alley; my ...
... heavenly wonders to friends. Many new friendships are made each year at the Conference, often under these dark skies, where faces are not seen and we learn to recognize the voice. Here is a place where astronomy is both enjoyed and shared. I turned and started walking back toward telescope alley; my ...
ISNS3371_040307_bw - The University of Texas at Dallas
... The eye consists of pupil that allows light into the eye - it controls the amount of light allowed in through the lens - acts like a simple glass lens which focuses the light on the retina - which consists of light sensitive cells that send signals to the brain via the optic nerve. An eye with perfe ...
... The eye consists of pupil that allows light into the eye - it controls the amount of light allowed in through the lens - acts like a simple glass lens which focuses the light on the retina - which consists of light sensitive cells that send signals to the brain via the optic nerve. An eye with perfe ...
Optics in Astronomy
... • It is important to consider the state of polarisation of the light as orthogonal states of polarisation do not interfere (laws of Fresnel-Arago). • Optical designs of interferometers which change the state of polarisaiton differently in different arms produce instrumental losses of coherence and t ...
... • It is important to consider the state of polarisation of the light as orthogonal states of polarisation do not interfere (laws of Fresnel-Arago). • Optical designs of interferometers which change the state of polarisaiton differently in different arms produce instrumental losses of coherence and t ...
ARGOS - The Laser Guide Star System for the LBT
... An indication of the performance that can be expected is demonstrated by Fig. 2 This image shows the central 700 pc of the nearby Seyfert galaxy NGC 4945 (D ~ 4 Mpc) and was obtained with the VLT LGSF and NACO. It is at an angular resolution (~0.15”) comparable to that predicted for the LBT LGS-GLAO ...
... An indication of the performance that can be expected is demonstrated by Fig. 2 This image shows the central 700 pc of the nearby Seyfert galaxy NGC 4945 (D ~ 4 Mpc) and was obtained with the VLT LGSF and NACO. It is at an angular resolution (~0.15”) comparable to that predicted for the LBT LGS-GLAO ...
The Visible and Infrared Survey Telescope for Astronomy \(VISTA
... The site was required to be in the southern hemisphere, since all the leading wide-field imaging systems then operating (SDSS) or under construction (CFHT-Megacam, SubaruSuprimeCam, UKIRT-WFCAM) were sited in the northern hemisphere. At the time of VISTA commissioning the only wide-area optical/near ...
... The site was required to be in the southern hemisphere, since all the leading wide-field imaging systems then operating (SDSS) or under construction (CFHT-Megacam, SubaruSuprimeCam, UKIRT-WFCAM) were sited in the northern hemisphere. At the time of VISTA commissioning the only wide-area optical/near ...
The Optical Gravitational Lensing Experiment. Photometry of the
... Fig. 2 presents OGLE observations of the MACHO-SMC-98-1 event. Solid and dotted lines correspond to the theoretical light curves of binary event proposed by PLANET collaboration which were kindly provided by Drs P. Sackett and M. Dominik. As the PLANET group observations were made in the I-band and ...
... Fig. 2 presents OGLE observations of the MACHO-SMC-98-1 event. Solid and dotted lines correspond to the theoretical light curves of binary event proposed by PLANET collaboration which were kindly provided by Drs P. Sackett and M. Dominik. As the PLANET group observations were made in the I-band and ...
LHDC High-Performance Fine-Steering Mirror Family
... The components of a typical precision pointing system include: – Beam-expander telescope – Fine-steering mechanism or fast-steering mechanism: two-axis reducedaperture, full-aperture steering mirror or isolation system – Coarse-pointing mechanism: vehicle attitude control system, two-axis gimbaled t ...
... The components of a typical precision pointing system include: – Beam-expander telescope – Fine-steering mechanism or fast-steering mechanism: two-axis reducedaperture, full-aperture steering mirror or isolation system – Coarse-pointing mechanism: vehicle attitude control system, two-axis gimbaled t ...
Discoveries with the Green Bank Telescope
... extreme magnetic fields, and gravity. With its wide sky coverage, excellent point source sensitivity, ability to track horizon-tohorizon, and low interference environment, the GBT is the world’s premier radio pulsar observatory. Projects such as the direct detection of gravitational waves require pr ...
... extreme magnetic fields, and gravity. With its wide sky coverage, excellent point source sensitivity, ability to track horizon-tohorizon, and low interference environment, the GBT is the world’s premier radio pulsar observatory. Projects such as the direct detection of gravitational waves require pr ...
Building large telescopes. I- Refractors.
... 1893 being displayed at the Columbia Exhibition in Chicago that same year. The 40-inch refractor (19.3 m focal length) went into operation only in 1897 after the foundation of the Yerkes Observatory in 1895. This refractor is still the largest in the world today. The combined weight of the two compo ...
... 1893 being displayed at the Columbia Exhibition in Chicago that same year. The 40-inch refractor (19.3 m focal length) went into operation only in 1897 after the foundation of the Yerkes Observatory in 1895. This refractor is still the largest in the world today. The combined weight of the two compo ...
Operations of the Keck AO
... Ok, watch PO and/or use pixel location Reliable, yet not optimized for IF and survey mode Automation needed Auto-recovery and automation needed ...
... Ok, watch PO and/or use pixel location Reliable, yet not optimized for IF and survey mode Automation needed Auto-recovery and automation needed ...
Flat top beam profile cavity prototype
... from the new mirrors • The mirrors built are at the lowest limit of manufacturable dimensions (Ø 5.08 cm) • Larger mirrors much easier!! • The test Mex-hat test mirrors are not perfect • The maps of the actual test mirrors have been used to calculate the expected best beam profile ...
... from the new mirrors • The mirrors built are at the lowest limit of manufacturable dimensions (Ø 5.08 cm) • Larger mirrors much easier!! • The test Mex-hat test mirrors are not perfect • The maps of the actual test mirrors have been used to calculate the expected best beam profile ...
lec-galatic-observat..
... Historical: Was the Milky Way really a disk of stars? Late last century, a disk theory was nearly abandoned before the improvement in telescopes and photography. It was thought that the dark rifts (as in the Aquila frame) in the Milky Way and dark patches (such as the Coal Sack) indicated an absenc ...
... Historical: Was the Milky Way really a disk of stars? Late last century, a disk theory was nearly abandoned before the improvement in telescopes and photography. It was thought that the dark rifts (as in the Aquila frame) in the Milky Way and dark patches (such as the Coal Sack) indicated an absenc ...
Science Jeopardy
... • ANSWER: This causes constellations to rise and set in the sky. • QUESTION: What is the Earth’s rotation? ...
... • ANSWER: This causes constellations to rise and set in the sky. • QUESTION: What is the Earth’s rotation? ...
Collimating Vixen VC200L / VMC200L Optical Tubes
... inside edge of the drawtube (not the center) and look at the outer edge of the central black donut. Just outside that donut you will see a reflection of the edge of the secondary baffle as a section of a thin dark ring with light on either side (Fig. 5). If collimation is good, that ring will be eve ...
... inside edge of the drawtube (not the center) and look at the outer edge of the central black donut. Just outside that donut you will see a reflection of the edge of the secondary baffle as a section of a thin dark ring with light on either side (Fig. 5). If collimation is good, that ring will be eve ...
Science Jeopardy
... • ANSWER: This causes constellations to rise and set in the sky. • QUESTION: What is the Earth’s rotation? ...
... • ANSWER: This causes constellations to rise and set in the sky. • QUESTION: What is the Earth’s rotation? ...
Air Cherenkov Methods in Cosmic Rays: A Review
... Imaging Telescope Array System) An array of seven 10m - 12m optical reflectors for gamma-ray astronomy in the GeV - TeV energy range ...
... Imaging Telescope Array System) An array of seven 10m - 12m optical reflectors for gamma-ray astronomy in the GeV - TeV energy range ...
Australian Membership of the Giant Magellan Telescope Project
... allow extensions of black hole – bulge mass studies to intermediate and high redshifts, probing the era of quasar growth. The GMT high-resolution spectrographs will probe the reionization epoch using z > 6 AGN discovered in large-area near-IR imaging surveys. Lastly, by working at intermediate resol ...
... allow extensions of black hole – bulge mass studies to intermediate and high redshifts, probing the era of quasar growth. The GMT high-resolution spectrographs will probe the reionization epoch using z > 6 AGN discovered in large-area near-IR imaging surveys. Lastly, by working at intermediate resol ...
Study of the Optical Parameters of the 40m LIGO Prototype
... LIGO, the Laser Interferometer Gravitational-Wave Observatory is a project dedicated to the detection of gravitational waves and the harnessing of these waves for scientific research. Gravitational waves, which are emitted by accelerated masses, were first predicted by Einstein in 1916 in his genera ...
... LIGO, the Laser Interferometer Gravitational-Wave Observatory is a project dedicated to the detection of gravitational waves and the harnessing of these waves for scientific research. Gravitational waves, which are emitted by accelerated masses, were first predicted by Einstein in 1916 in his genera ...
Very Large Telescope
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The Very Large Telescope (VLT) is a telescope operated by the European Southern Observatory on Cerro Paranal in the Atacama Desert of northern Chile. The VLT consists of four individual telescopes, each with a primary mirror 8.2 m across, which are generally used separately but can be used together to achieve very high angular resolution. The four separate optical telescopes are known as Antu, Kueyen, Melipal and Yepun, which are all words for astronomical objects in the Mapuche language. The telescopes form an array which is complemented by four movable Auxiliary Telescopes (ATs) of 1.8 m aperture.The VLT operates at visible and infrared wavelengths. Each individual telescope can detect objects roughly four billion times fainter than can be detected with the naked eye, and when all the telescopes are combined, the facility can achieve an angular resolution of about 0.001 arc-second (This is equivalent to roughly 2 meters resolution at the distance of the Moon).In single telescope mode of operation angular resolution is about 0.05 arc-second.The VLT is the most productive ground-based facility for astronomy, with only the Hubble Space Telescope generating more scientific papers among facilities operating at visible wavelengths. Among the pioneering observations carried out using the VLT are the first direct image of an exoplanet, the tracking of individual stars moving around the supermassive black hole at the centre of the Milky Way, and observations of the afterglow of the furthest known gamma-ray burst.