EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment EG057_1. If you have any comments on this experiment please email the address below.
A detailed description of the pipeline output is available.

Last updated: Tue Mar 20 10:58:26 CET 2012 yang@jive.nl

General Comments. ( Brief data summary and scan listing )
L band multiple phase-center experiment, observed on 1 Nov 2011. Data rate was 1 Gbps (16 X 16 MHz subbands, dual polarization, two-bit sampling). There were 27 phase centers including an in-beam calibrator in the target field. This data set only included all the calibrators. '3C454.3' was the bandpass calibrator.
12 stations participated.

The EVN reliability indicator (ERI) for this experiment was ERI = 0.97 . ERI* = 0.97 . (Tr=0.88, Sv=0.94). Tr: No fringes in IF 5 and 6, LL. Sv: Very weak fringes in IF 6, LL.

Plots of the autocorrelations
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plots of the uncalibrated amplitude and phase against time
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Plots of the uncalibrated amplitude and phase against frequency channel
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The uncalibrated amplitude and phase of the crosshand correlations against frequency channel (not available)
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TSYS against time
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For the small telescopes, Tsys data were multiplied by a factor in the antab file to do a simple primary beam correction.

Telescope sensitivities from the a priori TSYS and Gain curves (the square of this number gives the antenna noise (SEFD) in Jy - the smaller the better).
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Fringe-fit phase solutions (including Parallactic Angle correction).
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Reference antenna: Hh. Solution interval: 2 min. In the first 2-3 hours, most stations had low elevation (<25 deg) and sufferred significant ionospheric disturbance, thus phase variation did not look smooth.

Fringe-fit delay solutions
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Fringe-fit rate solutions
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Quite large and varied significantly. This was caused by the ionosphere.

Telescope bandpasses
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Bandpass calibrator: 3C454.3

Calibrated amplitude and phase against time (a priori amplitude calibration and fringe-fit solutions applied).
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Calibrated amplitude and phase against frequency channel
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Naturally weighted dirty map (not useful for bright sources) produced before self-cal of:
J2226+0052: pdf , or FITS .
3C48: pdf (not available) , or FITS (not available) .
J2229+0114: pdf (not available) , or FITS (not available) .
3C454.3: pdf (not available) , or FITS (not available) .
Comments.

Uniformly weighted dirty map (not useful for bright sources) produced before self-cal of:
J2226+0052: pdf , or FITS .
3C48: pdf (not available) , or FITS (not available) .
J2229+0114: pdf (not available) , or FITS (not available) .
3C454.3: pdf (not available) , or FITS (not available) .
Comments.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
J2226+0052 (not available) .
3C48 (not available) .
J2229+0114 (not available) .
3C454.3 (not available) .
Comments.

Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
J2226+0052: pdf (not available) , or text file (not available) , or statistical summary (not available) .
3C48: pdf (not available) , or text file (not available) , or statistical summary (not available) .
J2229+0114: pdf (not available) , or text file (not available) , or statistical summary (not available) .
3C454.3: pdf (not available) , or text file (not available) , or statistical summary (not available) .
Comments.

Telescope sensitivities (not available) (the total AMP gain applied during both a priori and self calibration; the square of this number gives the antenna noise (SEFD) in Jy).
Comments.

Residual closure phase (visibility closure phase with model closure phase subtracted) for:
J2226+0052 (not available) .
3C48 .
J2229+0114 .
3C454.3 .
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Calibrated visibilities and the source model of:
J2226+0052 (not available) .
3C48 .
J2229+0114 .
3C454.3 .
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Calibrated visibilities against u,v distance for:
J2226+0052: pdf , or png .
3C48: pdf , or png .
J2229+0114: pdf , or png .
3C454.3: pdf , or png .
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u,v coverage for:
J2226+0052: pdf , or png .
3C48: pdf , or png .
J2229+0114: pdf , or png .
3C454.3: pdf , or png .
Comments.

Crude maps of sources:
J2226+0052: pdf , or FITS .
3C48: pdf , or FITS .
J2229+0114: pdf , or FITS .
3C454.3: pdf , or FITS .
Comments.