EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment GP042. 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 Nov 8 12:24:11 CET 2005 campbell@jive.nl

General Comments. ( Brief data summary and scan listing )
GP042 had 16 stations, 2 8MHz IFs, and two polarizations. There were 64 frequency points per IF/pol, and integration times were 1s. Considerably more information is included in the experiment's cover letter on the standard-plots portion of the EVN Archive. In the pipelining, only J0958+65, 3C84, and J0927+39 were fringed. M82 was treated as the target source in a phase-reference pair with J0958+65 (its automatically- generated plots are not publicly available for the 1-year proprietary period). The SOLINT was 2.0min.

The EVN reliability indicator (ERI) for this experiment was ERI = 0.850 . ERI* = 0.837 . The ERI was 0.850. The losses include Mc dropping out after scan 70 because of Mk5 recording problems, no fringes to Nt-* IF2/LL, and limited time-range losses at Ef (snow), Pt, & Fd. The outage due to snow at Ef does not count against ERI*.

Plots of the autocorrelations .
Comments.
1292(!) pages, each scan plotted separately, all stations (3 or 4 pages per scan).

Plots of the uncalibrated amplitude and phase against time .
Comments.
16 pages, full-experiment for Ef-* baselines, no calibration applied. Each 1s integration plotted, thus much of phase(t) plots appear completely black

Plots of the uncalibrated amplitude and phase against frequency channel .
Comments.
991(!) pages, scalar averaged Ef-* baselines, each scan plotted separately.

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.

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 calibrators, each IF/pol on a separate plot. Evident outlier in Fd, IF2/RCP, last point

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

Telescope bandpasses .
Comments.
bandpass table 1. Only J0958+65 was used for bandpass calibration.

Calibrated amplitude and phase against time (a priori amplitude calibration and fringe-fit solutions applied).
Comments.
Ef-* baselines calibrated with table CL3 -- M82 points still dominate phase(t) plots, appear black except on shorter baselines.

Calibrated amplitude and phase against frequency channel .
Comments.
984 pages; Ef-* baselines calibrated with CL3 and BP1. Bandpass calibration "overcorrects" DC edge Cm IF1, and high-end of IF2 on Mc, Nt, and some VLBAs.

Naturally weighted dirty map produced before self-cal of:
J0958+65: postscript , or FITS .
3C84: postscript , or FITS .
J0927+39: postscript , or FITS .
M82: postscript , or FITS .
Comments.
Natural-weighted (dirty) maps for the sources. J0927+39 & 3C84 have only one (~5min) scan contributing to their maps.

Uniformly weighted dirty map produced before self-cal of:
J0958+65: postscript , or FITS .
3C84: postscript , or FITS .
J0927+39: postscript , or FITS .
M82: postscript , or FITS .
Comments.
Uniform-weighted (dirty) maps. Sidelobe response much more spatially localized than in the natural-weighted dirty maps.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
J0958+65.
3C84.
J0927+39.
M82.
Comments.
Plots of post-SPLIT tables SN1 for the sources. Some individually bad points can be seen in Ef-Jb for J0958+65. The scans of J0927+39 & 3C84 have only 3 SOLINTs.

Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
J0958+65: postscript , or text file .
3C84: postscript , or text file .
J0927+39: postscript , or text file .
M82: postscript , or text file .
Comments.
As above, but for the post-SPLIT table SN2. M82 has a fair amount of data flagged compared to the phases from the post-SPLIT SN1 (presumably because of too-weak self-cal solutions).

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:
J0958+65 .
3C84 .
J0927+39 .
M82 .
Comments.
128 pages, showing closure phase plots for all the triangles (not just Ef-*-*).

Calibrated visibilities and the source model of:
J0958+65 .
3C84 .
J0927+39 .
M82 .
Comments.
For each source, plots of amp/phase on Ef-* baselines calibrated with (post-SPLIT) table CL3, with a model-line overplotted. J0927+39 & 3C84 have only ~5min of data; the model line for J0958+65 can be lost under all the individual SOLINT points.

Calibrated visibilities against u,v distance for:
J0958+65. postscript , or png (smaller)
3C84. postscript , or png (smaller)
J0927+39. postscript , or png (smaller)
M82. postscript , or png (smaller)
Comments.
For each source, a plot of amp vs. |uv| distance. Some obvious high-biased points on individual baselines (spikes at a particular |uv|).

u,v coverage for:
J0958+65. postscript , or png (smaller)
3C84. postscript , or png (smaller)
J0927+39. postscript , or png (smaller)
M82. postscript , or png (smaller)
Comments.
For each source, a plot of the u-v coverage.

Crude maps of sources:
J0958+65: postscript , or FITS .
3C84: postscript , or FITS .
J0927+39: postscript , or FITS .
M82: postscript , or FITS .
Comments.
For each source, a CLEAN map resulting from the automated fringing/self-cal pipeline script. For J0927+39 & 3C84, a single ~5min snapshot image.