EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment EG078B_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: Mon May 18 14:54:44 CEST 2015 campbell@jive.nl

General Comments. ( Brief data summary and scan listing )
EG078B had 10 good stations, 8 16MHz IFs, 2 polarizations, 32 frequency points per IF/pol, and 3s 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 sources were treated as phase-reference targets and were not separately fringe-fit. The SOLINT was set automatically to a value commensurate with a typical reference-source scan. Ef, then Jb were used as the reference stations for fringing. The periods without good Zc (~1st half) and Bd (~2nd half) fringes was flagged in the UVFLG file, which improved the appearance of the UVPLT plots and the target's ICLN plot.

The EVN reliability indicator (ERI) for this experiment was ERI = 0.785 . ERI* = 0.785 . The losses include Zc and Bd missing (separate) halves of the experiment, and Jb missing 2 hours.

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-* 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-* 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. The x-axis scale for the 24-hour observation has become quite compressed. Bd and Zc have (phantom) points during the time-ranges that have been UVFLGed (for Zc whose such period starts off the experiment, clearly just the parallactic-angle calibration); by the time of the VPLOT_MODEL plots, these points are indeed missing.

Fringe-fit delay solutions
Comments.
SN2 station delay solutions for the fringed sources, each IF/pol on a separate plot. All stations have some outliers in IF1-2. Nt and Sh have some in a few more IF/pols. For Tr IF6/R, no fringe solutions after ~1800 and Tr IF1/L has few fringe solutions (these IF/pols had low amps in the standard plots amp(freq) plots).

Fringe-fit rate solutions
Comments.
SN2 station rate solutions. Similarly outliers in IF1-2 for all stations; more IF/pols with outliers in Nt,Tr,Sv,Sh.

Telescope bandpasses
Comments.
Bandpass table 1. 3C345 and DA193 were used for bandpass calibration. IF/pol with oddly-shaped pass-bands in the standard cross-a plots are reproduced here (e.g., On IF4/R, IF8/L).

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 1.5-minute 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:
3C345: pdf (not available) , or FITS (not available) .
HDFC0155: pdf , or FITS .
J1234+619: pdf (not available) , or FITS (not available) .
J1241+602: pdf (not available) , or FITS (not available) .
DA193: pdf (not available) , or FITS (not available) .
Comments.
Naturally-weighted dirty maps of the phase-referenced target.

Uniformly weighted dirty map (not useful for bright sources) produced before self-cal of:
3C345: pdf (not available) , or FITS (not available) .
HDFC0155: pdf , or FITS .
J1234+619: pdf (not available) , or FITS (not available) .
J1241+602: pdf (not available) , or FITS (not available) .
DA193: pdf (not available) , or FITS (not available) .
Comments.
Uniformly-weighted dirty maps of the phase-referenced target.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
3C345 .
HDFC0155 (not available) .
J1234+619 .
J1241+602 .
DA193 .
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.
3C345: pdf , or text file , or statistical summary .
HDFC0155: pdf (not available) , or text file (not available) , or statistical summary (not available) .
J1234+619: pdf , or text file , or statistical summary .
J1241+602: pdf , or text file , or statistical summary .
DA193: 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. The squares of these values are in a sense a measure of the empirical self-cal'ed SEFDs.

Residual closure phase (visibility closure phase with model closure phase subtracted) for:
3C345 .
HDFC0155 (not available) .
J1234+619 .
J1241+602 .
DA193 .
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:
3C345 .
HDFC0155 (not available) .
J1234+619 .
J1241+602 .
DA193 .
Comments.
For each (fringed) 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:
3C345: pdf , or png .
HDFC0155: pdf , or png .
J1234+619: pdf , or png .
J1241+602: pdf , or png .
DA193: pdf , or png .
Comments.
For each source, a plot of amp vs. |uv| distance. The main phase-reference source J1234 and the target have apparently excess flux density for |uv| ~25 Mlambda and the vey longest baselines. These issues can probably be improved with more careful calibration (no interactive SNSMO, SNEDT in the pipeline).

u,v coverage for:
3C345: pdf , or png .
HDFC0155: pdf , or png .
J1234+619: pdf , or png .
J1241+602: pdf , or png .
DA193: pdf , or png .
Comments.
For each source, a plot of the u-v coverage.

Crude maps of sources:
3C345: pdf , or FITS .
HDFC0155: pdf , or FITS .
J1234+619: pdf , or FITS .
J1241+602: pdf , or FITS .
DA193: 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.