Green Bank Telescope Observations of 3He+: H ii Regions
نویسندگان
چکیده
منابع مشابه
The Green Bank Telescope
Following two months of very successful commissioning and the first science observations on the GBT (see the following articles), operation was suspended in early April, one month earlier than planned, to work on the azimuth track. As described in previous NRAO Newsletters, the azimuth track wear strips, on which the azimuth wheels roll, were shifting slightly in a circumferential direction as ...
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A scanning laser rangefinder metrology system for the 100-meter Green Bank Telescope is de¬ scribed. Use of this system for correction of the primary reflector's shape and pointing of the tele¬ scope is described.
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During the design phase of the Green Bank Telescope (GBT), various means of providing an accurate surface (0.220 mm) on a large aperture paraboloid (100 m), were considered. Automated jacks supporting the primary reflector were selected as the appropriate technology since they promised greater performance and potentially lower costs than a homologous or carbon fiber design, and had certain adva...
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We report on polarimetric observations of 100 pulsars centered on 774 MHz, made using the Green Bank Telescope, presenting their polarization profiles and polarized flux densities and comparing them with previous observations when possible. For 67 pulsars, these are the first such measurements made. Polarization profiles of 8 millisecond pulsars in our sample show wide profiles and flat positio...
متن کاملOut-Of-Focus Holography at the Green Bank Telescope
We describe phase-retrieval holography measurements of the 100-m diameter Green Bank Telescope using astronomical sources and an astronomical receiver operating at a wavelength of 7 mm. We use the technique with parameterization of the aperture in terms of Zernike polynomials and employing a large defocus, as described by Nikolic et al. (2006). Individual measurements take around 25 minutes and...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2018
ISSN: 1538-3881
DOI: 10.3847/1538-3881/aaeb2b