EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment EA044_4. If you have any comments on this experiment please email the address below.
A detailed description of the pipeline output is available.

Last updated: Wed Aug 17 12:15:35 CEST 2011 campbell@jive.nl

General Comments. ( Brief data summary and scan listing )
EA044 had 7 stations, 1 8MHz IF, and 2 polarizations, with 1024 frequency points per IF and 0.25s integrations. This pipelining corresponds to the IRAS19422 Doppler-shifted mode. Considerably more information is included in the experiment's cover letter on the standard-plots portion of the EVN Archive. Only the reference sources were fringed in the pipelining, with no attempt to phase-reference to the line targets; we applied a UVAVG of the short integrations to 2s, and the SOLINT was set to 1 min. Ef was used as the primary reference station, with Ys as the secondary.

The EVN reliability indicator (ERI) for this experiment was ERI = 0.840 . ERI* = 0.840 . The losses include Jb not having good detections in one of two polarizations and also Ef missing 4 scans. The ERI numbers apply equally to both modes.

Plots of the autocorrelations
Comments.
Each scan plotted separately, all stations -- for some reason this plot refuses to make itself in this run. Later POSSMs of the cross-correlations seem fine.

plots of the uncalibrated amplitude and phase against time
Comments.
Full-experiment for Ef-* baselines, no calibration applied. A 1 minute plot-averaging was used.

Plots of the uncalibrated amplitude and phase against frequency channel
Comments.
Scalar averaged Ef-* 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 polarization 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 1/16 microsecond of delay.

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

Telescope bandpasses
Comments.
Bandpass table 1. 3C345 and 3C454.3 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-* baselines, calibrated with CL3. The 1-min plot-averaging still applied.

Calibrated amplitude and phase against frequency channel
Comments.
Ef-* 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:
3C454.3: pdf (not available) , or FITS (not available) .
3C345: pdf (not available) , or FITS (not available) .
Comments.

Uniformly weighted dirty map (not useful for bright sources) produced before self-cal of:
3C454.3: pdf (not available) , or FITS (not available) .
3C345: pdf (not available) , or FITS (not available) .
Comments.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
3C454.3 .
3C345 .
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.
3C454.3: pdf , or text file , or statistical summary .
3C345: pdf , or text file , or statistical summary .
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:
3C454.3 .
3C345 .
Comments.
Separate files per source, showing closure phase plots for all the triangles, not just Ef-*-*. Only stokes=I shown.

Calibrated visibilities and the source model of:
3C454.3 .
3C345 .
Comments.
For each source, plots of amp/phase on Ef-* baselines, calibrated with (post-SPLIT) table CL3, with a model-line overplotted.

Calibrated visibilities against u,v distance for:
3C454.3: pdf , or png .
3C345: pdf , or png .
Comments.
For each source, a plot of amp vs. |uv| distance.

u,v coverage for:
3C454.3: pdf , or png .
3C345: pdf , or png .
Comments.
For each source, a plot of the u-v coverage.

Crude maps of sources:
3C454.3: pdf , or FITS .
3C345: pdf , or FITS .
Comments.
For each source, a CLEAN map resulting from the automated fringing and self-cal iterations in the pipeline script.