EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment GM073B. 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 Jun 13 13:00:59 CEST 2022 marcote@jive.eu

General Comments. ( Brief data summary and scan listing )
C band global VLBI phase-referencing experiment, observed on 22 Feb 2016. Data rate was 2048 Mbps (8 X 32 MHz subbands, dual polarization, two-bit sampling). The target source B1938+666 was calibrated using the phase-reference sources J1933+654. 3C345, 3C454.3, and 3C380 were also observed as the calibrators and the fringe finders.
25 stations participated. Sh had no observations due to maintenance. T6 was used instead. Jb could not get fringes during the experiment due to local problems.

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
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.

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

Telescope bandpasses
Comments.
Bandpass table 1. 3C345, 3C454.3, and 3C380 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 1.5-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:
3C345: pdf (not available) , or FITS (not available) .
J1933+654: pdf (not available) , or FITS (not available) .
B1938+666: pdf , or FITS .
3C380: pdf (not available) , or FITS (not available) .
Comments.

Uniformly weighted dirty map (not useful for bright sources) produced before self-cal of:
3C345: pdf (not available) , or FITS (not available) .
J1933+654: pdf (not available) , or FITS (not available) .
B1938+666: pdf , or FITS .
3C380: pdf (not available) , or FITS (not available) .
Comments.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
3C345 .
J1933+654 .
B1938+666 (not available) .
3C380 .
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 .
J1933+654: pdf , or text file , or statistical summary .
B1938+666: pdf (not available) , or text file (not available) , or statistical summary (not available) .
3C380: 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:
3C345 .
J1933+654 .
B1938+666 (not available) .
3C380 .
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 .
J1933+654 .
B1938+666 (not available) .
3C380 .
Comments.
For each (fringed) source, plots of amp/phase on Mc-* baselines, calibrated with (post-SPLIT) table CL3, with a model-line overplotted.

Calibrated visibilities against u,v distance for:
3C345: pdf , or png .
J1933+654: pdf , or png .
B1938+666: pdf , or png .
3C380: pdf , or png (not available) .
Comments.
For each source, a plot of amp vs. |uv| distance.

u,v coverage for:
3C345: pdf , or png .
J1933+654: pdf , or png .
B1938+666: pdf , or png .
3C380: pdf , or png .
Comments.
For each source, a plot of the u-v coverage.

Crude maps of sources:
3C345: pdf , or FITS .
J1933+654: pdf , or FITS .
B1938+666: pdf , or FITS .
3C380: pdf , or FITS .
Comments.
For each source, a CLEAN map resulting from the automated fringing and self-cal iterations in the pipeline script.