EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment N09K1. If you have any comments on this experiment please email the address below.
A detailed description of the pipeline output is available.

Last updated: Thu Jul 9 17:25:33 CEST 2009 muehle@jive.nl

General Comments. ( Brief data summary and scan listing )
K band (22 GHz) network monitoring experiment (NME) observed on 3 March 2009. The data rate was 256 Mbps (4 x 16 MHz subbands, dual polarization, two-bit sampling). The target source '0536+145' was calibrated using the phase-reference source '0528+134'. '0202+319', '3C84', '3C454.3', 'NRAO150' and '4C39.25' were also observed as fringe finders and calibrators. The maser source 'W3OH' was observed to provide additional real-time diagnostics to the stations.
8 stations participated in the experiment: Ef, Jb, On, Mc, Nt, Sh, Mh and Ys. There were fringes to all stations. Nt recorded only LCP due to a problem with the receiver. The Jb data have weights of zero in the first three scans. On reported bad weather throughout the experiment.

The EVN reliability indicator (ERI) for this experiment was ERI = 0.85 . ERI* = 0.85 . (EF=1, JB=0.9, ON=1, MC=1, NT=0.5, MH=1, YS=1, SH=1)

Plots of the autocorrelations
Comments.
Mc, Sh: wiggely bandpasses, but stable; W3OH: maser line not seen due to error in source position; 122 pages

plots of the uncalibrated amplitude and phase against time
Comments.
not unexpectedly, fast phase rotation seen on all baselines; Ys: amplitude variations in all IFs, most likely due to a broken RG-58 cable (P. de Vicente); Nt: LCP only due to a receiver problem; 8 pages

Plots of the uncalibrated amplitude and phase against frequency channel
Comments.
bandpasses seem to be stable; in general, phases look good, even uncalibrated; poor phases at 15:57-16:02 UT; 122 pages

The uncalibrated amplitude and phase of the crosshand correlations against frequency channel
Comments.
Nt recorded only LCP, not included in plots; 61 pages

TSYS against time
Comments.
Jb: T_sys=1; On: unusually high T_sys; Mc: strong increase in T_sys at ~13:25 UT; Ys: T_sys three times the usual value at around 13:00 UT => weather?; 3 pages

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).
Comments.
nothing unexpected; 3 pages

Fringe-fit phase solutions (including Parallactic Angle correction).
Comments.
refant = Ef; generally fast fringe rates; 3 pages

Fringe-fit delay solutions
Comments.
refant = Ef; delays of the order of (a few tens of) nanoseconds; Mc: delays in RCP channels significantly higher than in the other channels; very few outliers; 3 pages

Fringe-fit rate solutions
Comments.
refant = Ef; rates of the order of mHz; 3 pages

Telescope bandpasses
Comments.
refant = Ef; looking good; 2 pages

Calibrated amplitude and phase against time (a priori amplitude calibration and fringe-fit solutions applied).
Comments.
refant = Ef; not surprisingly, phases still show significant scatter around zero; Nt: LCP only; Ys: amplitude variations, most likely due to a broken RG-58 cable; 8 pages

Calibrated amplitude and phase against frequency channel
Comments.
bandpasses look stable; phases close to zero for calibrators; 119 pages

Naturally weighted dirty map (not useful for bright sources) produced before self-cal of:
NRAO150: pdf (not available) , or FITS (not available) .
0202+319: pdf (not available) , or FITS (not available) .
3C454.3: pdf (not available) , or FITS (not available) .
4C39.25: pdf (not available) , or FITS (not available) .
0528+134: pdf (not available) , or FITS (not available) .
3C84: pdf (not available) , or FITS (not available) .
0536+145: pdf , or FITS .
Comments.

Uniformly weighted dirty map (not useful for bright sources) produced before self-cal of:
NRAO150: pdf (not available) , or FITS (not available) .
0202+319: pdf (not available) , or FITS (not available) .
3C454.3: pdf (not available) , or FITS (not available) .
4C39.25: pdf (not available) , or FITS (not available) .
0528+134: pdf (not available) , or FITS (not available) .
3C84: pdf (not available) , or FITS (not available) .
0536+145: pdf , or FITS .
Comments.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
NRAO150 .
0202+319 .
3C454.3 .
4C39.25 .
0528+134 .
3C84 .
0536+145 (not available) .
Comments.
refant = Ef; phase corrections within a couple of degrees; a few outliers; Jb: very few solutions for 0202+319 (scans 1-3, zero weights); 3 pages per source

Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
NRAO150: pdf , or text file , or statistical summary .
0202+319: pdf , or text file , or statistical summary .
3C454.3: pdf , or text file , or statistical summary .
4C39.25: pdf , or text file , or statistical summary .
0528+134: pdf , or text file , or statistical summary .
3C84: pdf , or text file , or statistical summary .
0536+145: pdf (not available) , or text file (not available) , or statistical summary (not available) .
Comments.
On: gain amplitudes unusually low for all sources; 3 pages per source

Telescope sensitivities (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.
nothing unusual detected; a few outliers; On: unusually low sensitivity (see also T_sys); 3 pages

Residual closure phase (visibility closure phase with model closure phase subtracted) for:
NRAO150 .
0202+319 .
3C454.3 .
4C39.25 .
0528+134 .
3C84 .
0536+145 (not available) .
Comments.
residual closure phases of strong calibrators generally small, except for loops with very long baselines (Sh); a few outliers; up to 12 pages per source

Calibrated visibilities and the source model of:
NRAO150 .
0202+319 .
3C454.3 .
4C39.25 .
0528+134 .
3C84 .
0536+145 (not available) .
Comments.
in general, good agreement between models and data; Ys: amplitude fluctuations in all channels, probably due to a broken RG-58 cable; NRAO150: 14:47-14:48 UT bad; 8 pages per source

Calibrated visibilities against u,v distance for:
NRAO150: pdf , or png .
0202+319: pdf , or png .
3C454.3: pdf , or png .
4C39.25: pdf , or png .
0528+134: pdf , or png .
3C84: pdf , or png .
0536+145: pdf , or png .
Comments.

u,v coverage for:
NRAO150: pdf , or png .
0202+319: pdf , or png .
3C454.3: pdf , or png .
4C39.25: pdf , or png .
0528+134: pdf , or png .
3C84: pdf , or png .
0536+145: pdf , or png .
Comments.

Crude maps of sources:
NRAO150: pdf , or FITS .
0202+319: pdf , or FITS .
3C454.3: pdf , or FITS .
4C39.25: pdf , or FITS .
0528+134: pdf , or FITS .
3C84: pdf , or FITS .
0536+145: pdf , or FITS .
Comments.