EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment EG078D_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: Fri Oct 28 10:26:33 CEST 2016 campbell@jive.eu

General Comments. ( Brief data summary and scan listing )
EG078D had 12 good stations, 8 16MHz IFs, 2 polarizations, 32 frequency points per IF/pol, and 3s integrations (per phase-center). 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 first multiple phase-center output (target HDFC0155), which is the only one containing the non-target scans. In the pipelining, the target was treated as phase-reference target and wwas not separately fringe-fit. The SOLINT was set automatically to a value commensurate with a typical reference-source scan. Ef, and then T6, were used as the reference stations (T6 to cover the time-range in Ef after RCP died).

The EVN reliability indicator (ERI) for this experiment was ERI = 0.573 . ERI* = 0.979 if Zc,Bd problems were RFI; 0.665 if not. . ERISTAR does not include weather effects, under which I'm also including the known RFI that led to IF flagging at Mc (IF1,2,8), Sv (IF1), and Tr (IF6). ERIVAL includes all losses. A pessimistic view that all of Zc and Bd are lost is computed both as RFI (not in ERISTAR) and not (in ERISTAR). The other weather-related loss is a 2-hour late start at Ef. O8's 1.5-hr late start does go into ERISTAR.

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

Plots of the uncalibrated amplitude and phase against time
Comments.
Full-experiment for T6-* 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 T6-* 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. There was a fair amount of editing done on the apriori ANTAB file during the course of pipelining. An apparent error in the linear term of Bd's gain curve polynomial coefficients was fixed (5.22e-2 --> 5.22e-3). Tsys values from the field-system logs for Jb and Zc were unphysically scattered, so unity Tsys were used along with DPFU = reciprocal noninal SEFD. Patches of unphyscial Tsys >10k K were edited out from individual channels for Mc, Ur, T6.

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. The different behavior for the RR & LL pols of T6 correspond to its becoming the reference station in RR after Ef's RCP dies (around 1400). There are a few individual outliers that could be removed with SNEDT (e.g., O8 5L,8R; Mc 5R/L, 8R; Tr 2L; Sv 2R, 4R, 5R/L, 8R).

Fringe-fit rate solutions
Comments.
SN2 station rate solutions. Same comment about T6 RR & LL behaviour as for the FRING_DELAY plot. Also a few individual outlier, which can lead to instances of likely bad phase-connection choice as seen in the FRING_PHAS plot (e.g., On 4R, 5L,6L; Mc 7R; Tr a few IF/pols; Sv the low (~-20) solint just before 2200); Ur the low (~-10) solint just before 1400.

Telescope bandpasses
Comments.
Bandpass table 1. DA193, 3C345, J1241+602 were used for bandpass calibration (J1241 was needed because there were neither of the fringe-finder scans were really good for Bd or especially Zc.

Calibrated amplitude and phase against time (a priori amplitude calibration and fringe-fit solutions applied).
Comments.
Full-experiment for T6-* baselines, calibrated with CL3. The 1.5-min plot-averaging still applied.

Calibrated amplitude and phase against frequency channel
Comments.
T6-* 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:
J1234+619: pdf (not available) , or FITS (not available) .
DA193: pdf (not available) , or FITS (not available) .
J1241+602: pdf (not available) , or FITS (not available) .
3C345: pdf (not available) , or FITS (not available) .
HDFC0155: pdf , or FITS .
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:
J1234+619: pdf (not available) , or FITS (not available) .
DA193: pdf (not available) , or FITS (not available) .
J1241+602: pdf (not available) , or FITS (not available) .
3C345: pdf (not available) , or FITS (not available) .
HDFC0155: pdf , or FITS .
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.
J1234+619 .
DA193 .
J1241+602 .
3C345 .
HDFC0155 (not available) .
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.
J1234+619: pdf , or text file , or statistical summary .
DA193: pdf , or text file , or statistical summary .
J1241+602: pdf , or text file , or statistical summary .
3C345: pdf , or text file , or statistical summary .
HDFC0155: pdf (not available) , or text file (not available) , or statistical summary (not available) .
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:
J1234+619 .
DA193 .
J1241+602 .
3C345 .
HDFC0155 (not available) .
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:
J1234+619 .
DA193 .
J1241+602 .
3C345 .
HDFC0155 (not available) .
Comments.
For each (fringed) source, plots of amp/phase on T6-* baselines, calibrated with (post-SPLIT) table CL3, with a model-line overplotted.

Calibrated visibilities against u,v distance for:
J1234+619: pdf , or png .
DA193: pdf , or png .
J1241+602: pdf , or png .
3C345: pdf , or png .
HDFC0155: pdf , or png .
Comments.
For each source, a plot of amp vs. |uv| distance. J1234 has excess FD around 25 Mlamdba (also the case in 78B, with also had excess FD above 45 Mlambda not seen here). J1241 has a few high outliers around 20 Mlamda and HDFC0155 also, around 12-15 Mlambda. Overall, editing the ANTAB file greatly reduced the amount of extremely high outliers in the amp(|uv|) plots.

u,v coverage for:
J1234+619: pdf , or png .
DA193: pdf , or png .
J1241+602: pdf , or png .
3C345: pdf , or png .
HDFC0155: pdf , or png (not available) .
Comments.
For each source, a plot of the u-v coverage.

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