EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment EM071D_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: Thu Jun 7 08:45:41 CEST 2012 campbell@jive.nl

General Comments. ( Brief data summary and scan listing )
EM071D had 7 stations, 8 2MHz IFs, and two polarizations. There were two passes: this pipelinig corresponds to the continuum pass, with 128 frequency points per IF/pol and 1s integrations. Considerably more information is included in the experiment's cover letter on the standard-plots portion of the EVN Archive. In the pipelining, the target source was treated as phase-referenced sources and not directly fringed. The SOLINT was set automatically at a representative length of a reference-source scan in a phase-reference cycle. Ef, and then Ys (to cover the time-range when Ef had tracking problems, were used as the reference stations.

The EVN reliability indicator (ERI) for this experiment was ERI = 0.696 . ERI* = 0.879 . The losses include Ef pointing problems (45min), Mc computer problems (30min, but not including the period after that for which their effective sesnsitivity was noticeably lower), Tr having BBC4 dead, and Tr,Ys,Mc having IF2/RCP flagged. Also included in the ERI but not the ERI* was On having to stow the telescope for ~5.5hr. The average ERI over both passes was 0.669, and the average ERI* 0.848.

Plots of the autocorrelations
Comments.
Each scan plotted separately, all stations.

plots of the uncalibrated amplitude and phase against time
Comments.
Full-experiment for Ef-* and Ys-* baselines, no calibration applied. A 1.5 minute plot-averaging was used.

Plots of the uncalibrated amplitude and phase against frequency channel
Comments.
Scalar averaged Ef-* and Ys-* baselines, each scan plotted separately. No calibration applied yet.

The uncalibrated amplitude and phase of the crosshand correlations against frequency channel (not available)
Comments.

TSYS against time
Comments.
TY1 table, each IF/pol on a separate plot.

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.
Gain amplitude from CL2 table.

Fringe-fit phase solutions (including Parallactic Angle correction).
Comments.
CL3 station phase solutions -- CL3 = CL2+SN2, thus also includes the initial amplitude/parallactic angle calibration from CL2 and the fringe solutions from SN2.

Fringe-fit delay solutions
Comments.
SN2 station delay solutions for the fringed sources, each IF/pol on a separate plot. For this experiment, one lag corresponds to 1/4 microsecond of delay. Jb got good-enough fringe solutions essentially only for J1751 & J2253. Mc sensitivity went down in the latter part of the experiment as discussed in the cover letter, also leading to fewer post-FRING detections.

Fringe-fit rate solutions
Comments.
SN2 station rate solutions.

Telescope bandpasses
Comments.
Bandpass table 1. J1751+0939 and J2251608 were used for bandpass calibration.

Calibrated amplitude and phase against time (a priori amplitude calibration and fringe-fit solutions applied).
Comments.
Full-experiment for Ef-* and Ys-* baselines, calibrated with CL3. The 1.5-min plot-averaging still applied.

Calibrated amplitude and phase against frequency channel
Comments.
Ef-* and Ys-* baselines calibrated with CL3 and BP1. The amp and phase plots self-scale, not necessarily going down to 0 in the case of the amps.

Naturally weighted dirty map (not useful for bright sources) produced before self-cal of:
J1834-0301: pdf (not available) , or FITS (not available) .
J1751+0939: pdf (not available) , or FITS (not available) .
J2253+1608: pdf (not available) , or FITS (not available) .
G31.41: pdf , or FITS .
Comments.
Naturually weighted dirty map of the target.

Uniformly weighted dirty map (not useful for bright sources) produced before self-cal of:
J1834-0301: pdf (not available) , or FITS (not available) .
J1751+0939: pdf (not available) , or FITS (not available) .
J2253+1608: pdf (not available) , or FITS (not available) .
G31.41: pdf , or FITS .
Comments.
Uniformly weighted dirty map of the target.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
J1834-0301 .
J1751+0939 .
J2253+1608 .
G31.41 (not available) .
Comments.
Plots of post-SPLIT tables SN1 for the sources that have been individually fringed.

Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
J1834-0301: pdf , or text file , or statistical summary .
J1751+0939: pdf , or text file , or statistical summary .
J2253+1608: pdf , or text file , or statistical summary .
G31.41: pdf (not available) , or text file (not available) , or statistical summary (not available) .
Comments.
As above, but for the post-SPLIT table SN2.

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.
CL4 gain-amp.

Residual closure phase (visibility closure phase with model closure phase subtracted) for:
J1834-0301 .
J1751+0939 .
J2253+1608 .
G31.41 (not available) .
Comments.
Separate files per (fringed) source, showing closure phase plots for all the triangles. Only stokes=I shown.

Calibrated visibilities and the source model of:
J1834-0301 .
J1751+0939 .
J2253+1608 .
G31.41 (not available) .
Comments.
For each (fringed) source, plots of amp/phase on Ef-* and Ys-* baselines, calibrated with (post-SPLIT) table CL3, with a model-line overplotted.

Calibrated visibilities against u,v distance for:
J1834-0301: pdf , or png .
J1751+0939: pdf , or png .
J2253+1608: pdf , or png .
G31.41: pdf , or png .
Comments.
For each source, a plot of amp vs. |uv| distance.

u,v coverage for:
J1834-0301: pdf , or png .
J1751+0939: pdf , or png .
J2253+1608: pdf , or png .
G31.41: pdf , or png .
Comments.
For each source, a plot of the u-v coverage.

Crude maps of sources:
J1834-0301: pdf , or FITS .
J1751+0939: pdf , or FITS .
J2253+1608: pdf , or FITS .
G31.41: pdf , or FITS .
Comments.
For each source, a CLEAN map resulting from the automated fringing and self-cal iterations (or phase-referencing) in the pipeline script.