منابع مشابه
Polarization Observations of 100 Pulsars at 774 Mhz by the Green Bank Telescope
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 کاملA 1400-MHz pilot search for young pulsars
We have used the Effelsberg 100-m radio telescope to conduct a 1400-MHz (λ 21-cm) search for young and rapidly rotating radio pulsars along a 2 deg2 strip of the northern Galactic plane defined by 28◦ ≤ l ≤ 30◦ and |b| ≤ 0.5◦. This region lies close to the Scutum spiral arm which is already known to contain a number of radio and X–ray pulsars. The search was nominally sensitive to pulsars with ...
متن کاملThe 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 ...
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...
متن کاملThe Caltech–Jodrell Bank VLBI Surveys
The Caltech–Jodrell Bank VLBI surveys of bright extragalactic radio sources north of declination 35 were carried out between 1990 and 1995 using the Mark-II system, achieving images with a resolution of about 1 mas at 5 GHz. The CJ1 survey (together with the older ‘PR’ survey) includes 200 objects with 5 GHz flux density greater than 0.7 Jy; the CJ2 survey includes 193 flat-spectrum sources wit...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1977
ISSN: 0074-1809
DOI: 10.1017/s007418090001603x