EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment GI004_2. 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 Oct 15 17:35:20 CEST 2007 campbell@jive.nl

General Comments. ( Brief data summary and scan listing )
GI004 had 18 stations, with no more than 16 at any time. Mc missed the entire experiment (antenna drive motor failure). There were three correlation passes; this pipelining corresponds to the line-LCP pass, with 1 1MHz IFs, LCP only, 512 frequency points per IF/pol, and 4s 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 maser sources were not fringed. The SOLINT was set automatically at a representative length of a reference-source scan in a phase-reference cycle (about 1.5 minute). Ef and La were used as the reference stations.

The EVN reliability indicator (ERI) for this experiment was ERI = 0.669 . ERI* = 0.669 . The ERI for the line-LCP pass was 0.669 The ERI pertains to only the EVN stations in the experiment. The losses include Mc missing the whole experiment and Hh missing about 1hr. The ERI and ERI* for the whole experiment (over all 4IF/2pol), was 0.606.

Plots of the autocorrelations
Comments.
411 pages, each scan plotted separately, all stations.

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

Plots of the uncalibrated amplitude and phase against frequency channel
Comments.
277 pages, scalar averaged Ef-* & La-* 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.
2 pages, TY1 table.

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.
2 pages, gain amplitude from CL2 table.

Fringe-fit phase solutions (including Parallactic Angle correction).
Comments.
2 pages, 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.
2 pages, SN2 station delay solutions for the fringed sources, each IF/pol on a separate plot. For this pass, one lag corresponds to 1/2 microsecond of delay. Some outliers in Pt, Ov, and Br. La takes over as the reference station (when Ef finishes its observations) at a time of delay-rate about -3mHz.

Fringe-fit rate solutions
Comments.
2 pages, SN2 station rate solutions. Outliers in Nl, Pt, Br, and Ov. Rate of La when it becomes the reference station clear.

Telescope bandpasses
Comments.
4 pages, bandpass table 1. OT081, 2145+067, and J1833+01 were used for bandpass calibration (the latter to provide a means to incorporate Hh).

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

Calibrated amplitude and phase against frequency channel
Comments.
261 pages, Ef-* & La-* 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:
W43AOH: pdf , or FITS .
J1833+01: pdf (not available) , or FITS (not available) .
1830+139: pdf (not available) , or FITS (not available) .
OT081: pdf (not available) , or FITS (not available) .
Comments.
Natural-weighted dirty map of the phase-reference target.

Uniformly weighted dirty map (not useful for bright sources) produced before self-cal of:
W43AOH: pdf , or FITS .
J1833+01: pdf (not available) , or FITS (not available) .
1830+139: pdf (not available) , or FITS (not available) .
OT081: pdf (not available) , or FITS (not available) .
Comments.
Uniform-weighted dirty map of the phase-reference target.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
W43AOH (not available) .
J1833+01 .
1830+139 .
OT081 .
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.
W43AOH: pdf (not available) , or text file (not available) , or statistical summary (not available) .
J1833+01: pdf , or text file , or statistical summary .
1830+139: pdf , or text file , or statistical summary .
OT081: 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.
2 pages, CL4 gain-amp.

Residual closure phase (visibility closure phase with model closure phase subtracted) for:
W43AOH (not available) .
J1833+01 .
1830+139 .
OT081 .
Comments.
Separate files per (fringed) source, showing closure phase plots for all the triangles (not just Ef-*-* or La-*-*). Plot annotation says stokes=I, but only LCP data exist here.

Calibrated visibilities and the source model of:
W43AOH (not available) .
J1833+01 .
1830+139 .
OT081 .
Comments.
For each (fringed) source, plots of amp/phase on Ef-* & La-* baselines, calibrated with (post-SPLIT) table CL3, with a model-line overplotted.

Calibrated visibilities against u,v distance for:
W43AOH: pdf , or png .
J1833+01: pdf , or png .
1830+139: pdf , or png .
OT081: pdf , or png .
Comments.
For each source, a plot of amp vs. |uv| distance.

u,v coverage for:
W43AOH: pdf , or png .
J1833+01: pdf , or png .
1830+139: pdf , or png .
OT081: pdf , or png .
Comments.
For each source, a plot of the u-v coverage.

Crude maps of sources:
W43AOH: pdf , or FITS .
J1833+01: pdf , or FITS .
1830+139: pdf , or FITS .
OT081: 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. The plot annotation says stokes=I, but only LCP data exist here.