On Rapid Interstellar Scintillation of Quasars: PKS 1257-326 Revisited
نویسندگان
چکیده
منابع مشابه
Annual Cycles in the Interstellar Scintillation Timescales of PKS B 1519 – 273 and PKS B 1622 – 253 Steven
We have used the University of Tasmania’s 30-m radio telescope at Ceduna in South Australia to regularly monitor the flux density of a number of southern blazars. We report the detection of an annual cycle in the variability timescale of the centimetre radio emission of PKSB1622–253. Observations of PKSB1519–273 over a period of nearly two years confirm the presence of an annual cycle in the va...
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Interstellar scintillation (ISS) has been established as the cause of the random variations seen at centimetre wavelengths in many compact radio sources on timescales of a day or less. Observations of ISS can be used to probe structure both in the ionized insterstellar medium of the Galaxy, and in the extragalactic sources themselves, down to μas scales. A few quasars have been found to show la...
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Aims. We studied the turbulence spectrum of the local interstellar plasma in the direction of PSR J0437−4715, on the basis of our observations and those reported earlier by others. Methods. We combine these data to form a structure function for the variations of phase along the line of sight to the pulsar. For observations that did not report them, we infer modulation indices from a theoretical...
متن کاملInterstellar Scintillation of PSR J 0437 − 4715 on Two Scales ?
We sought to determine the scale of scintillation in the interstellar plasma of PSR J0437−4715. We used the Very Long Baseline Array to obtain scintillation amplitude and phase data, from dynamic spectra at 327 MHz. We observe two scales of scintillation of pulsar PSR J0437−4715, differing by more than an order of magnitude in scintillation bandwidth. The widerbandwidth scale of scintillation t...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2011
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921312000439