EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment N09C3. 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 2 15:19:27 CET 2010 yang@jive.nl

General Comments. ( Brief data summary and scan listing )
C band (1.6 GHz) network monitoring experiment (NME) observed on 23 Oct 2009. The data rate was 256 Mbps (8 x 8 MHz subbands, dual polarization, two-bit sampling). The experiment observed four sources 3C454.3, J2254+1341, 3C84, and 0234+285. In this pipeline reduction, Ef was served as the reference antenna, the source J2254+1341 was calibrated by the phase-referencing source 3C454.3.
12 stations participated in the experiment: Da, Kn, Ef, Jb, On, Mc, Nt, Tr, Wb, Ys, Ur and Sh. There were no fringes to Kn in IF2. TR data could not be played back since can 22 due to disk problems.

The EVN reliability indicator (ERI) for this experiment was ERI = 0.74 . ERI* = 0.74 . (DA=1, KN=0.5, EF=1, JB=1, ON=1, MC=1, NT=1, TR=1, WB=1, YS =1 UR=1, SH=0.8)

Plots of the autocorrelations
Comments.
Bandpasses seem to be stable.

plots of the uncalibrated amplitude and phase against time
Comments.
UR: Fringes rotate a bit of fast.

Plots of the uncalibrated amplitude and phase against frequency channel
Comments.
Clock delay works fine. Note that CM was affected by bad bandpass shape. 96 pages

The uncalibrated amplitude and phase of the crosshand correlations against frequency channel
Comments.
Looking good; 64 pages

TSYS against time
Comments.
ON: problem with diode reported. 10 pages

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.

Fringe-fit phase solutions (including Parallactic Angle correction).
Comments.
refant = Ef; UR: Fast phase rotation as expected. 9 pages

Fringe-fit delay solutions
Comments.
refant = Ef; NT: 1 microsecond clock jump was found at 22h32m UT. 8 pages

Fringe-fit rate solutions
Comments.
refant = Ef; UR: fringe rate is a few of milliHz, slightly higher. 8 pages

Telescope bandpasses
Comments.
refant = Ef; DA & KN: bad bandpass in IF2. 3 pages

Calibrated amplitude and phase against time (a priori amplitude calibration and fringe-fit solutions applied).
Comments.
OK: Phase is flat versus time. Note that the target source J2254+1341 was calibrated by 3C454.3. 23 pages

Calibrated amplitude and phase against frequency channel
Comments.
OK: Phase is flat across frequency channel. 96 pages

Naturally weighted dirty map (not useful for bright sources) produced before self-cal of:
3C84: pdf (not available) , or FITS (not available) .
3C454.3: pdf (not available) , or FITS (not available) .
J2254+1341: pdf , or FITS .
0234+285: pdf (not available) , or FITS (not available) .
Comments.

Uniformly weighted dirty map (not useful for bright sources) produced before self-cal of:
3C84: pdf (not available) , or FITS (not available) .
3C454.3: pdf (not available) , or FITS (not available) .
J2254+1341: pdf , or FITS .
0234+285: pdf (not available) , or FITS (not available) .
Comments.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
3C84 .
3C454.3 .
J2254+1341 (not available) .
0234+285 .
Comments.
refant = Ef; phase corrections of the order of degrees (< 20 deg);

Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
3C84: pdf , or text file , or statistical summary .
3C454.3: pdf , or text file , or statistical summary .
J2254+1341: pdf (not available) , or text file (not available) , or statistical summary (not available) .
0234+285: pdf , or text file , or statistical summary .
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:
3C84 .
3C454.3 .
J2254+1341 (not available) .
0234+285 .
Comments.

Calibrated visibilities and the source model of:
3C84 .
3C454.3 .
J2254+1341 (not available) .
0234+285 .
Comments.

Calibrated visibilities against u,v distance for:
3C84: pdf , or png .
3C454.3: pdf , or png .
J2254+1341: pdf , or png .
0234+285: pdf , or png .
Comments.

u,v coverage for:
3C84: pdf , or png .
3C454.3: pdf , or png .
J2254+1341: pdf , or png .
0234+285: pdf , or png .
Comments.

Crude maps of sources:
3C84: pdf , or FITS .
3C454.3: pdf , or FITS .
J2254+1341: pdf , or FITS .
0234+285: pdf , or FITS .
Comments.