Rapid Interstellar Scintillation of Quasar PKS 1257-326
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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The quasar 0917+624 has been one of the best studied intraday variable (IDV) radio sources. However, debate continues as to whether the underlying cause is intrinsic or extrinsic. Much previous work has assumed the IDV to be intrinsic and which implies an extraordinarily compact source for the radio emission; in contrast, an extrinsic variation due to interstellar scintillation (ISS) implies a ...
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We report the discovery of fast, frequency-dependent intensity variations from the scintillating intra-day variable quasar J1819+3845 at λ 21 cm which resemble diffractive interstellar scintillations observed in pulsars. The observations were taken with the Westerbork Synthesis Radio Telescope on a dozen occasions in the period between Aug 2002 and Jan 2005. The data were sampled at both high t...
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We have made a radio and optical study of the radio source PKS 0241+011 associated with a quasar at z = 1.40. In earlier radio maps this source appears as a large triple radio source with an angular extent of 400 arcsec (2.4h −1 Mpc; H 0 = 100h km s −1 Mpc −1 , q 0 = 0.0). If the triple radio structure seen in radio maps represents a single object, PKS 0241+011 would be the largest radio quasar...
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ژورنال
عنوان ژورنال: Highlights of Astronomy
سال: 2005
ISSN: 1539-2996
DOI: 10.1017/s1539299600016865