The intra-hour variable quasar J1819+3845: 13-year - Astron
Oct 9, 2012 ... The intra-hour variable quasar J1819+3845: 13-year evolution, jet ... on the RM change based upon 21 cm polarization observations.
[ deBruyn-Macquart-J1819-Oct2012.pdf - Read/Download File
The intra-hour variable quasar J1819+3845: 13-year evolution, jet
We examine the long-term evolution of the intra-hour variable quasar, J1819+ 3845, whose .... observations, by splitting the WSRT in sub-arrays of 5 (3.6 cm),.
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Two-year monitoring of intra-day variability of quasar 1156+295 at
of annual modulation in the timescales of intra-day variable (IDV) sources. Methods. The IDV .... quasar 1156+295 shows IDV in most of the observing ses- sions at a .... ing it between the intra-hour variables and the classical IDV sources .
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The intra-hour variable quasar J1819 $+ $3845: 13-year evolution
Aug 12, 2014 ... The intra-hour variable quasar J1819+3845: 13-year evolution, jet ... on the RM change based upon 21 cm polarization observations.
[ 1408.2200.pdf - Read/Download File
Detection of six rapidly scintillating active galactic nuclei and the
Sep 20, 2011 ... The intra-hour variable quasar J1819+3845: 13-year evolution, ... The extreme, intra-hour and >10% rms flux density scintillation observed in ...
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Intra-day variability observations and the VLBI structure analysis of
Apr 28, 2015 ... of intra-day variable (IDV) extragalactic radio sources. .... one sample per hour for each target source (where a sample is a ... The results from the IDV observations of quasar S4 0917+624 with the Urumqi 25 m telescope at 4.8 ...
[ 1504.04141 - Read/Download File
Time domain studies of Active Galactic Nuclei with the Square
Jan 19, 2015 ... In §2.1 below we discuss direct observations of intrinsic AGN variability, with reference to ..... AGN, with almost 80% being flat-spectrum radio quasars and ... emplary “intrahour variables” being discovered serendipitously, the ...
[ 1501.04627 - Read/Download File
Emergence and disappearance of micro-arcsecond structure in the
May 23, 2007 ... ABSTRACT. The 4.8 GHz lightcurves of the scintillating intra-day variable quasar J1819+3845 dur- ... ulations on intra-hour timescales at centimetre wavelengths. ... ture within J1819+3845 at λ6 cm by comparing observations.
[ 0705.3414 - Read/Download File
Annual modulation in the scattering of J1819+ 3845: Peculiar
The intra-hour variable quasar J1819+3845: 13-year evolution, jet polarization ... The velocity calculated from these observations is in good agreement with that ...
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Rapid polarization variations at 20 cm in 0917+ 624
The intra-hour variable quasar J1819+3845: 13-year evolution, ... Very Long Baseline Array observations of the intraday variable source J1128+592. A&A 508 ...
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tions of scattering of nearby pulsars and intra-day variable quasars point to the existence of a ... Study of scattering material with RadioAstron-VLBI observations ... nent is also responsible for the variability of intra-hour-variable quasars at ...
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PoS(11th EVN Symposium)051 - Sissa
quasar J1819+3845 has been observed with a number of VLBI arrays. ... Observation taken with VLBA in 2007 and with EVN in 2008 (Cimò et al. ....  G. de Bruyn & J.-P. Macquart, 2012, The intra-hour variable quasar J1819+3845: 13 -year.
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PoS(RTS2012)014 - Sissa
Recent WSRT observations at 21 cm and 85 cm of the radio source BLLac, long known ... The scintillating compact intra hour variable (IHV) quasar J1819+3845, ...
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PoS(RTS2012)015 - Proceedings of Science - Sissa
VLA observations were conducted at two frequencies. Our sample shows ... The “ intra-hour variable” quasars PKS 0405−385, J1819+3845 and PKS 1257−326 ...
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Serendipitous VLBI detection of rapid, large-amplitude, intraday
Sep 2, 2008 ... radio quasar 1156+295 during an observing session at the Very Long ... 1156+ 295 between the classical IDV sources and the so-called intra-hour variables. ... that interstellar scintillation (ISS) is the cause of intra-hour.
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Green Bank Telescope observations of the water masers of NGC
Oct 30, 2006 ... We present observations of the 22 GHz H2O megamasers in the circumnuclear ..... is also seen for the intra-hour variable quasars and for the.
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Parsec-scale structure of quasars: dawn of the golden age?
Oct 3, 2013 ... However, the finest hour for parsec scale observations may be .... intra-Earth baselines, imaging using space-VLBI is very challenging (though .... the flat spectrum sources that are the most violently variable subset in the family ...
[ 1310.0875v1.pdf - Read/Download File
The discovery of a microarcsecond quasar: J1819+ 3845
Dec 13, 1999 ... This source, J1819+3845, is the most extremely variable extragalactic source known in ... seen in intra-day variables (IDV). Subject headings: ISM: ... 12 hour run, and for the intermittent observations over the full 96hours, and ...
[ 419658_9912218.pdf - Read/Download File
Intranight optical variability of radio-quiet and radio lobe dominated
Jun 19, 2003 ... and an equal number of radio-loud, lobe-dominated quasars (LDQs), covering a red- shift range from ... ity on hour-like timescales for blazars has been a well es- tablished ... The recent clear detection of intra-night optical variability (INOV) of .... ticular class are detected as variable to the total observing.
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41 - Australian Institute of Physics
In addition to source-intrinsic variability, compact AGN (quasars and BL Lac- ... between weak and strong scattering, which occurs at observing frequencies of a few .... No new extreme, intra-hour variable (IHV) sources were discovered in the ...
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