EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment EB085B. If you have any comments on this experiment please email the address below.
A detailed description of the pipeline output is available.

Last updated: Sat Jul 9 01:08:36 CEST 2022 marcote@jive.eu

General Comments. ( Brief data summary and scan listing )
EB085B, X-band phase-referencing experiment on 7 November 2021. The target SN2014C was phase-referenced to J2248+3718. Other fringe-finders observed: 3C454.3, 3C345. The check source was J2235+3418 (not phase-referenced to J2248+3718 in this pipeline).

Some data is recommended to be flaged during the post-processing: Ef before 12:30 UT, Km after 19:00 UT (low/variable amplitudes at low elevations), and Tr IF#1. The on-off-source information at Medicina may not be accurate as some off-source data come through (see e.g. Mc-Ys baseline). It is recommended to run QUACK in AIPS to flag data at the start of the target scans.

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. Applied gain scale FT factors to some of the telescopes that had systematic errors in amplitude: Nt (0.05), Ir (2.7), Bd (0.5), Zc (0.5). These FT factors are actually the square of the amplitude "offsets". The Noto amplitudes require a huge and time-variable correction. It may be possible to correct for with an additional a&p selfcal, but maybe it is best to flag the data.

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.

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:
J2235+3418: pdf (not available) , or FITS (not available) .
SN2014C: pdf , or FITS .
3C454.3: pdf (not available) , or FITS (not available) .
3C345: pdf (not available) , or FITS (not available) .
J2248+3718: pdf (not available) , or FITS (not available) .
Comments.

Uniformly weighted dirty map (not useful for bright sources) produced before self-cal of:
J2235+3418: pdf (not available) , or FITS (not available) .
SN2014C: pdf , or FITS .
3C454.3: pdf (not available) , or FITS (not available) .
3C345: pdf (not available) , or FITS (not available) .
J2248+3718: pdf (not available) , or FITS (not available) .
Comments.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
J2235+3418 .
SN2014C (not available) .
3C454.3 .
3C345 .
J2248+3718 .
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.
J2235+3418: pdf , or text file , or statistical summary .
SN2014C: pdf (not available) , or text file (not available) , or statistical summary (not available) .
3C454.3: pdf , or text file , or statistical summary .
3C345: pdf , or text file , or statistical summary .
J2248+3718: 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:
J2235+3418 .
SN2014C (not available) .
3C454.3 .
3C345 .
J2248+3718 .
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:
J2235+3418 .
SN2014C (not available) .
3C454.3 .
3C345 .
J2248+3718 .
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:
J2235+3418: pdf , or png .
SN2014C: pdf , or png .
3C454.3: pdf , or png .
3C345: pdf , or png .
J2248+3718: pdf , or png .
Comments.
For each source, a plot of amp vs. |uv| distance.

u,v coverage for:
J2235+3418: pdf , or png .
SN2014C: pdf , or png .
3C454.3: pdf , or png .
3C345: pdf , or png .
J2248+3718: pdf , or png .
Comments.
For each source, a plot of the u-v coverage.

Crude maps of sources:
J2235+3418: pdf , or FITS .
SN2014C: pdf , or FITS .
3C454.3: pdf , or FITS .
3C345: pdf , or FITS .
J2248+3718: pdf , or FITS .
Comments.
For each source, a CLEAN map resulting from the automated fringing and self-cal iterations in the pipeline script.