EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment GM049A. If you have any comments on this experiment please email the address below.
A detailed description of the pipeline output is available.

Last updated: Mon Dec 5 14:24:33 CET 2005 reynolds@jive.nl

General Comments. ( Brief data summary and scan listing )
Global experiment with 16 stations (5 EVN, full VLBA and VLA), 4 x 8 MHz subbands and two polarizations. Correlated with 16 spectral channels per subband and an integration time of 4 seconds. J1819+3845 is rapidly variable and pipeline results for this source should not be used for diagnostic purposes. Solution interval was 1.5 minutes in fringe fitting.

The EVN reliability indicator (ERI) for this experiment was ERI = 0.85 . ERI* = 0.85 . ERI does not include VLBA stations. (Eb=0.93, Wb=0.98, On=1, Mc=1, Nt=0.75)

Plots of the autocorrelations .
Comments.

Plots of the uncalibrated amplitude and phase against time .
Comments.
Overall data quality is very good
NT: poor playback, affecting esp. Lpol-IF2 and Lpol-IF4 Eb: missing data from 19:34 - 20:45

Plots of the uncalibrated amplitude and phase against frequency channel .
Comments.
Noto: different subbands have different sensitivities.

The uncalibrated amplitude and phase of the crosshand correlations against frequency channel (not available) .
Comments.

TSYS against time .
Comments.

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.
Sensitivities agree well with the EVN status table

Fringe-fit phase solutions (including Parallactic Angle correction).
Comments.
Solutions seem good (note rapid phase wrapping at MK due to long baseline to reference antenna).

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.
Channels at band edge should be flagged.
Noto: differences in sensitivity between channles not corrected by Tsys calibration.

Naturally weighted dirty map produced before self-cal of:
1749+096: postscript , or FITS .
2007+777: postscript , or FITS .
2200+420: postscript , or FITS .
J1819+3845: postscript , or FITS .
Comments.
Dirty maps not useful for these bright sources.

Uniformly weighted dirty map produced before self-cal of:
1749+096: postscript , or FITS .
2007+777: postscript , or FITS .
2200+420: postscript , or FITS .
J1819+3845: postscript , or FITS .
Comments.
Dirty maps not useful for these bright sources.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
1749+096.
2007+777.
2200+420.
J1819+3845.
Comments.

Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
1749+096: postscript , or text file , or statistical summary .
2007+777: postscript , or text file , or statistical summary .
2200+420: postscript , or text file , or statistical summary .
J1819+3845: postscript , or text file , or statistical summary .
Comments.
Amplitude corrections for Noto are occasionally very large.
J1819+3845 not useful for checking amplitude calibration due to rapid source variability.

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:
1749+096 .
2007+777 .
2200+420 .
J1819+3845 .
Comments.

Calibrated visibilities and the source model of:
1749+096 .
2007+777 .
2200+420 .
J1819+3845 .
Comments.

Calibrated visibilities against u,v distance for:
1749+096. postscript , or png (smaller)
2007+777. postscript , or png (smaller)
2200+420. postscript , or png (smaller)
J1819+3845. postscript , or png (smaller)
Comments.

u,v coverage for:
1749+096. postscript , or png (smaller)
2007+777. postscript , or png (smaller)
2200+420. postscript , or png (smaller)
J1819+3845. postscript , or png (smaller)
Comments.

Crude maps of sources:
1749+096: postscript , or FITS .
2007+777: postscript , or FITS .
2200+420: postscript , or FITS .
J1819+3845: postscript , or FITS .
Comments.