EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment ES063B_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: Tue Feb 23 10:45:42 CET 2010 yang@jive.nl

General Comments. ( Brief data summary and scan listing )
ES063B was a methanol maser experiment at 6.7 GHz on 3 Nov 2009. The experiment used 9 EVN stations and a setup of 2 x 2 MHz IFs, dual polarizations and 2 bit sampling. The post correlation was done with 1024 frequency points per IF and 2 second integrations and in three parts. The first parts used the frequency setups Doppler@NGC7538. The other two parts used the frequency setup Doppler@W51 with different phase centers. Here, it is the second part with the phase ceter at W51E1E2. In the pipelining, the target maser sources W51E1E2 was calibrated using their nearby phase-referencing source 'J1930+1532'. J2202+4216 was bandpass calibrator.

The EVN reliability indicator (ERI) for this experiment was ERI = 0.99 (Ef=1, MC=1, JB=1, TR=0.95, YS=1, DA=1, NT=1, WB=1, ON=1) . ERI* = 0.99 . Torun lost signal for half hour (9h10 --9h40m UT) because of a spontaneous switch in the distribution system on the antenna.

Plots of the autocorrelations
Comments.
Mathanol masers were clearly detected at all stations.

plots of the uncalibrated amplitude and phase against time
Comments.
Full-experiment on Ef-* baselines, no calibration applied. A 0.2-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.

TSYS against time
Comments.
TY1 table, each IF/pol on a separate plot. Dummy antab file was used for Darnhall.

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.
FRING_PHAS 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. Proper solutions found at all stations and in all the IFs.

Fringe-fit rate solutions
Comments.
SN2 station rate solutions. Looks fine.

Telescope bandpasses
Comments.
Bandpass table 1. As expected, J2202+4216 is a good bandpass calibrator.

Calibrated amplitude and phase against time (a priori amplitude calibration and fringe-fit solutions applied).
Comments.
Full-experiment on Ef-* baselines, calibrated with CL3. The phase of W51E1E2 were not stopped very well by interpolation of solutions of the reference source as it may have large structure or postion offset.

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:
J1930+1532: pdf (not available) , or FITS (not available) .
W51E1E2: pdf , or FITS .
J2202+4216: pdf (not available) , or FITS (not available) .
Comments.

Uniformly weighted dirty map (not useful for bright sources) produced before self-cal of:
J1930+1532: pdf (not available) , or FITS (not available) .
W51E1E2: pdf , or FITS .
J2202+4216: pdf (not available) , or FITS (not available) .
Comments.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
J1930+1532 .
W51E1E2 (not available) .
J2202+4216 .
Comments.
Plots of post-SPLIT tables SN1 for the sources.

Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
J1930+1532: pdf , or text file , or statistical summary .
W51E1E2: pdf (not available) , or text file (not available) , or statistical summary (not available) .
J2202+4216: 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:
J1930+1532 .
W51E1E2 (not available) .
J2202+4216 .
Comments.
Separate files per (fringed) source, showing closure phase plots for all the triangles (not just Ef-*-*). Only stokes=I shown.

Calibrated visibilities and the source model of:
J1930+1532 .
W51E1E2 (not available) .
J2202+4216 .
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:
J1930+1532: pdf , or png .
W51E1E2: pdf , or png .
J2202+4216: pdf , or png .
Comments.
For each source, a plot of amp vs. |uv| distance.

u,v coverage for:
J1930+1532: pdf , or png .
W51E1E2: pdf , or png .
J2202+4216: pdf , or png .
Comments.
For each source, a plot of the u-v coverage.

Crude maps of sources:
J1930+1532: pdf , or FITS .
W51E1E2: pdf , or FITS .
J2202+4216: 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.