| Fabrication, Testing, Coating and Alignment of Fast Segmented Optics |
25 MAY 2006 |
24 pages |
| Authors:
Hubert Martin; Roger Angel; James Burge; Joseph Talghader; STEWARD OBSERVATORY TUCSON AZ
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 | The report presents the results of the MRI addressing four of the most critical technologies needed to produce large-aperture, lightweight, high-power HEL systems. They are: polishing large off-axis segments of fast primary mirrors; testing large segments in an off-axis geometry; alignment of multiple segments of a large mirror; and coatings that reflect high-intensity light without distorting the substrate. The program made substantial progress in all areas. Some of the most ... |
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| Spacewatch Survey for Asteroids and Comets |
18 JUL 2003 |
27 pages |
| Authors:
Robert S. McMillan; STEWARD OBSERVATORY TUCSON AZ
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| The Spacewatch Project discovered comets and Trans-Neptunian, Centaur, Trojan, Main-Belt, and Earth-approaching (EA) asteroids, providing information about the evolution of these objects and their orbits. Spacewatch also found asteroids that might present a hazard of impact on the Earth, and recovered high-priority comets and asteroids that were too faint for most other asteroid observing stations. During this grant interval, Spacewatch made a total of 3,885 positional measurements of 440 EAs, ... |
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| Adaptive Optics for the 6.5 m MMT Conversion, Development of Very High Resolution Imaging with Adaptive Optics for Large Telescopes, and Advanced Adaptive Optics for the World's Largest Telescopes |
19 APR 2001 |
26 pages |
| Authors:
M. Lloyd-Hart; T. McMahon; STEWARD OBSERVATORY TUCSON AZ
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| This report outlines the focus of the development of advanced adaptive optics at the University of Arizona, Steward Observatory's Center for Astronomical Adaptive Optics (CAAO). The main focus of the development effort has been the design and development of the world's first adaptive secondary and control system for the 6.5 m MMT facility in Southern Arizona. The system is now undergoing extensive testing at the Steward Observatory Mirror Laboratory prior ... |
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| New Research in Sky Surveillance - Interpretation of Low-Luminosity Objects |
15 DEC 2000 |
17 pages |
| Authors:
Robert S. McMillan; STEWARD OBSERVATORY TUCSON AZ
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| Spacewatch is an exploration of the whole solar system for minor planets and comets, from the inner solar system to beyond Neptune's orbit. During this report period, Spacewatch discovered 23 Earth-approachers (EAs), 9, 910 main belt asteroids (MBAs), a new satellite of Jupiter, 2 comets, 9 Centaurs or scattered-disk objects, and 6 Trans-Neptunian Objects (TNOs). Spacewatch made a new estimate of the number of km-sized EAs, from which it has ... |
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| New Research in Sky Surveillance - Interpretation of Low-Luminosity Objects |
15 DEC 2000 |
18 pages |
| Authors:
Robert S. McMillan; STEWARD OBSERVATORY TUCSON AZ
|
| Spacewatch is an exploration of the whole solar system for minor planets and comets, from the inner solar system to beyond Neptune's orbit. During this report period, Spacewatch discovered 23 Earth-approachers (EAs), 9, 910 main belt asteroids (MBAs), a new satellite of Jupiter, 2 comets, 9 Centaurs or scattered-disk objects, and 6 Trans-Neptunian Objects (TNOs). Spacewatch made a new estimate of the number of km-sized EAs, from which it has ... |
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| A Characterization of the Hot Infrared Background: The Infrared Cirrus, Zodiacal Dust Bands, and Solar System Dust Trails |
01 APR 91 |
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| Authors:
F. Low; M. Sykes; R. Cutri; STEWARD OBSERVATORY TUCSON AZ
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 | Utilizing data from the Infrared Astronomical Satellite, we have completed an investigation into the nature and properties of the principal components of the hot thermal background. These include the warm infrared cirrus, zodiacal dust bands, and cometary dust trails. A large set of high galactic latitude IRAS Skyflux maps have been cleaned using an image-space processor which we have developed. Using these enhanced infrared maps, 44 fields have been identified ... |
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| A Quantum-Efficient Systematics-Free Photon-Counting Optical Imaging System for Long Baseline Interferometric Imaging of Faint Deep Space Objects |
JUN 90 |
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| Authors:
E. K. Hege; STEWARD OBSERVATORY TUCSON AZ
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| We have developed a four state Proxitronic image intensifier with system digital video readout for use as a high detective quantum efficiency photon-counting imaging detector optimized for long baseline speckle interferometric imaging of deep space objects. Accurate noise bias calibration requires low geometric distortion image intensifiers as well as linear video readout to yield a stable, calibratable photon point spread function. The image intensifier optimization is not limited to video ... |
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| Gain, Pulse Power Distribution, and Single Electron Counting Efficiency of P-20, P-47, and X-3 Phosphors |
APR 90 |
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| Authors:
STEWARD OBSERVATORY TUCSON AZ
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| Analysis has been made of the dc gain, the pulse power distribution (PPD) and the single photoelectron counting efficiency of P-20, P-47 and X-3 phosphors. The results have been obtained by testing fully operating image intensifiers as well as by examining phosphor screen samples using a scanning electron microscope. Two P-47 intensifiers were manufactured by ITT with the screens processed in identically the same way as the screens used in ... |
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| The Tempel 2 Dust Trail |
28 SEP 89 |
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| Authors:
M. V. Sykes; R. G. Walker; D. J. Lien; STEWARD OBSERVATORY TUCSON AZ
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| Observations of cometary dust at visual wavelengths are dominated by particles microns in size. At thermal wavelengths emissions from submillimeter and larger particles become important. Dust trails are phenomena which were first detected by the Infrared Astronomical Satellite (IRAS), and have been identified as large debris covering portions of the orbits of short-period comets. The Tempel 2 Dust Trail was extensively observed by the IRAS. Evidence is presented suggesting that ... |
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| The Interstellar Absorption in Selected Area 47 |
14 JUL 1969 |
30 pages |
| Authors:
Julian J. Schreur; STEWARD OBSERVATORY TUCSON AZ
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| A study of the obscuration in the direction of Selected Area 47 (1(II) = 159 degrees, b(II) = -21 degrees) has been made. An absorbing cloud was found at a distance of 300 pc with a total visual absorption of 2.0 magnitudes. (Author) |
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| Research in Stellar Spectroscopy |
1964 |
25 pages |
| Authors:
A. B. Meinel; Edwin F. Carpenter; Anthony F. Aveni; STEWARD OBSERVATORY TUCSON AZ
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| The project involved the modification of the Carpenter nebular spectrograph to permit a wide range of applications, and its use in research on galaxies and faint stars. It also involved partial support for the construction of a stellar spectrograph for the Cassegrain focus of the 36-inch Steward telescope. One of the major tasks was the rebuilding of the instrument to use glass plates instead of film. The method is used ... |
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| White Dwarfs From the SDSS: 90 Prime - Goin' Deep in the White Dwarf Luminosity Function |
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7 pages |
| Authors:
James Liebert; Mukremin Kilic; Kurtis A von Williams; Ted Hippel; Don Winget; Jeff Munn; Hugh C Harris; Stephen Levine; Travis S Metcalfe; STEWARD OBSERVATORY TUCSON AZ
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| A large sample of cool white dwarfs from the Sloan Digital Sky Survey has been used to construct a luminosity function (LF), with the selection based on the method of reduced proper motion. While the sample is 60 times larger than that from our Luyten Half Second proper motion survey, its sensitivity to the region past the peak of the LF is severely limited by the necessity to match positions ... |
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