EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment EP087C_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 Aug 5 18:33:52 CEST 2013 campbell@jive.nl

General Comments. ( Brief data summary and scan listing )
EP087C had 12 good stations, 8 16MHz IFs, 4 polarizations, 32 frequency points per IF/pol, and 2s integrations. Considerably more information is included in the experiment's cover letter on the standard-plots portion of the EVN Archive. This pipelining corresponds to the multiple phase-center output target ARP299A. 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 and then Wb, were used as the reference stations.

The EVN reliability indicator (ERI) for this experiment was ERI = 0.704 . ERI* = 0.944 . The losses include the last couple hours due to weakening detections (FRING solutions, but lost by the time of the SENS plot). Weather and RFI-related losses contribute to the ERI, but not the ERI*. These include the loss of a couple hours at Ef due to snow, and also the flagged IFs due to RFI: half of IF2 for everyone; IF1 for Sv,Zc,Bd; IF7 for Jb; and IFs 1,2,8 for Mc.

Plots of the autocorrelations
Comments.
Each scan plotted separately, all stations.

plots of the uncalibrated amplitude and phase against time
Comments.
Full-experiment for Wb-* 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 Wb-* baselines, each scan plotted separately. No calibration applied yet.

The uncalibrated amplitude and phase of the crosshand correlations against frequency channel
Comments.
Scalar averaged Wb-* baselines showing LR, each scan plotted separately. No calibration applied yet.

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. Several station/IF/pols show bad (automatic) phase-connection decisions.

Fringe-fit delay solutions
Comments.
SN2 station delay solutions for the fringed sources, each IF/pol on a separate plot. Ur,Bd,Sh get higher rates later in the experiment (decreasing elevation).

Fringe-fit rate solutions
Comments.
SN2 station rate solutions. A large outlier in Tr IF 5L/6R/7R early.

Telescope bandpasses
Comments.
Bandpass table 1. 3C273 was used for bandpass calibration.

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

Calibrated amplitude and phase against frequency channel
Comments.
Wb-* 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:
J1128+5925: pdf (not available) , or FITS (not available) .
ARP299A: pdf , or FITS .
3C273: pdf (not available) , or FITS (not available) .
Comments.
Naturally-weighted dirty maps of the phase-referenced-to sources.

Uniformly weighted dirty map (not useful for bright sources) produced before self-cal of:
J1128+5925: pdf (not available) , or FITS (not available) .
ARP299A: pdf , or FITS .
3C273: pdf (not available) , or FITS (not available) .
Comments.
Uniformly-weighted dirty maps of the phase-referenced-to sources.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
J1128+5925 .
ARP299A (not available) .
3C273 .
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.
J1128+5925: pdf , or text file , or statistical summary .
ARP299A: pdf (not available) , or text file (not available) , or statistical summary (not available) .
3C273: 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:
J1128+5925 .
ARP299A (not available) .
3C273 .
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:
J1128+5925 .
ARP299A (not available) .
3C273 .
Comments.
For each (fringed) source, plots of amp/phase on Wb-* baselines, calibrated with (post-SPLIT) table CL3, with a model-line overplotted.

Calibrated visibilities against u,v distance for:
J1128+5925: pdf , or png .
ARP299A: pdf , or png .
3C273: pdf , or png .
Comments.
For each source, a plot of amp vs. |uv| distance.

u,v coverage for:
J1128+5925: pdf , or png .
ARP299A: pdf , or png .
3C273: pdf , or png .
Comments.
For each source, a plot of the u-v coverage.

Crude maps of sources:
J1128+5925: pdf , or FITS .
ARP299A: pdf , or FITS .
3C273: 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.