EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment N15C2. If you have any comments on this experiment please email the address below.
A detailed description of the pipeline output is available.

Last updated: Thu Dec 10 17:38:42 CET 2015 mao@jive.eu

General Comments. ( Brief data summary and scan listing )
C band (6cm) NME, observed on 4 June 2015. Data rate was 512 Mbps (8 X 8 MHz subbands, full polarization, two-bit sampling). The observation comprises integrations on strong calibrators (J0126+2559, J1051+2119) for ftp-fringe tests. 15 stations scheduled, however only 14 stations recorded data. Wb also tested DBBC as 'Wd' and Ef and O8 tested flexbuff as 'Ex' and 'Ox' respectively.

The EVN reliability indicator (ERI) for this experiment was ERI = 0.86 . ERI* = 0.86 . The ERI* value takes into account that:
- T6 produced no fringes
- EF missed scans 8 & 9.

The ERI value also takes into account losses that are outside the station's control, of which there were none for this experiment.

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.
There's something odd with IF 6LR EF-JB.

TSYS against time
Comments.
TY1 table, each IF/pol on a separate plot. ZC R Tsys is high...

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. ZC R Gain is high. YS has a relatively large gain difference between the two target sources.

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. J0126+2559 and J1051+2119 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. A 1.5 minute plot-averaging was used.

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. It looks like WB is bad in IFs 4,6,8 for both pols. NT L has odd structure. TR IF2L is bad.

Naturally weighted dirty map (not useful for bright sources) produced before self-cal of:
J0126+2559: pdf (not available) , or FITS (not available) .
J1051+2119: pdf (not available) , or FITS (not available) .
Comments.
Naturally weighted dirty maps of phase-referenced sources. Detected.

Uniformly weighted dirty map (not useful for bright sources) produced before self-cal of:
J0126+2559: pdf (not available) , or FITS (not available) .
J1051+2119: pdf (not available) , or FITS (not available) .
Comments.
Uniformly weighted dirty maps of phase-referenced sources. Detected.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
J0126+2559 .
J1051+2119 .
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.
J0126+2559: pdf , or text file , or statistical summary .
J1051+2119: 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. Calibration has fixed ZC...

Residual closure phase (visibility closure phase with model closure phase subtracted) for:
J0126+2559 .
J1051+2119 .
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:
J0126+2559 .
J1051+2119 .
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:
J0126+2559: pdf , or png .
J1051+2119: pdf , or png .
Comments.
For each source, a plot of amp vs. |uv| distance. Some bad data still present. But at least there aren't any sources with _more_ flux in the longer baselines !

u,v coverage for:
J0126+2559: pdf , or png .
J1051+2119: pdf , or png .
Comments.
For each source, a plot of the u-v coverage.

Crude maps of sources:
J0126+2559: pdf , or FITS .
J1051+2119: 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 peak fluxes are a factor of a few lower than the calibrator database values.