EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment GD018_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: Wed Aug 10 19:57:43 CEST 2005 bignall@jive.nl

General Comments. ( Brief data summary and scan listing )
This is a Global phase-referencing experiment at 21cm, recorded at 256 Mbps (dual polarization, 4*8 MHz IFs, 2-bit sampling) on 4 March 2005. Participating stations were JB, WB, EF, ON, MC, NT, TR, UR, the VLA, Green Bank and Arecibo. The experiment was correlated in two passes. This page shows plots from the pipeline for the continuum pass (32 spectral channels per IF).

The EVN reliability indicator (ERI) for this experiment was ERI = 0.79 . ERI* = 0.85 . (JB=0.86, WB=1.0, EF=0.93, ON=0.85, MC=1.0, NT=0.85, TR=0.7, UR=1.0)

Plots of the autocorrelations .
Comments.
IF 3 apparently shows HI in most autocorrelations.
Torun has no data for RCP in IF2 due to problem with BBC#3.
Effelsberg autocorrelations for LCP in IF3 have been flagged due to a correlator problem.
Some RFI problems at most stations. There is a fairly persistent narrow spike in IF4 at Medicina (near 1428 MHz).

Plots of the uncalibrated amplitude and phase against time .
Comments.
Effelsberg was off source from UT 10:00 until 10:52 due to snow.
No fringes to Jodrell between 11:24 and 13:12 UT as the antenna was stowed due to high winds.
Onsala and Noto both have reduced sensitivity in IF2, LCP.
The first scan on 3C84 is outside of Westerbork's hour angle range.
Greenbank is missing for the last half-hour as data on the second tape was lost.

Plots of the uncalibrated amplitude and phase against frequency channel .
Comments.

The uncalibrated amplitude and phase of the crosshand correlations against frequency channel .
Comments.

TSYS against time .
Comments.
Nominal sensitivity assumed for Arecibo.

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.
VLA Tsys is really Tant/Tsys: a source flux density is required to calculate the gain, so 'SETJY' was run with ZEROSP=2,0 for the calibrator 0234+285. 0234+285 is variable, and the current flux density is not accurately known. The nominal value of 2 Jy was assumed to be the approximate flux density based on archival data. The gain corrections found during self-calibration are reasonably close to 1.

Fringe-fit phase solutions (including Parallactic Angle correction).
Comments.

Fringe-fit delay solutions .
Comments.

Fringe-fit rate solutions .
Comments.

Telescope bandpasses .
Comments.

Calibrated amplitude and phase against time (a priori amplitude calibration and fringe-fit solutions applied).
Comments.

Calibrated amplitude and phase against frequency channel .
Comments.

Naturally weighted dirty map produced before self-cal of:
0234+285: postscript , or FITS .
J0257+1847: postscript , or FITS .
IRAS02524: postscript , or FITS .
3C84: postscript , or FITS .
Comments.

Uniformly weighted dirty map produced before self-cal of:
0234+285: postscript , or FITS .
J0257+1847: postscript , or FITS .
IRAS02524: postscript , or FITS .
3C84: postscript , or FITS .
Comments.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
0234+285.
J0257+1847.
IRAS02524.
3C84.
Comments.

Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
0234+285: postscript , or text file .
J0257+1847: postscript , or text file .
IRAS02524: postscript , or text file .
3C84: postscript , or text file .
Comments.

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.

Residual closure phase (visibility closure phase with model closure phase subtracted) for:
0234+285 .
J0257+1847 .
IRAS02524 .
3C84 .
Comments.

Calibrated visibilities and the source model of:
0234+285 .
J0257+1847 .
IRAS02524 .
3C84 .
Comments.

Calibrated visibilities against u,v distance for:
0234+285. postscript , or png (smaller)
J0257+1847. postscript , or png (smaller)
IRAS02524. postscript , or png (smaller)
3C84. postscript , or png (smaller)
Comments.

u,v coverage for:
0234+285. postscript , or png (smaller)
J0257+1847. postscript , or png (smaller)
IRAS02524. postscript , or png (smaller)
3C84. postscript , or png (smaller)
Comments.

Crude maps of sources:
0234+285: postscript , or FITS .
J0257+1847: postscript , or FITS .
IRAS02524: postscript , or FITS .
3C84: postscript , or FITS .
Comments.