EVN User Experiment Pipeline Feedback
Pipeline feedback for experiment EM040.
If you have any comments on this experiment please email
the
address below.
Last updated: Fri Oct 18 14:35:22 CEST 2002
imai@jive.nl
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General Comments.
(
Brief data summary and
scan listing.)
This project consists of 4 stations: Jb, Eb, On, Tr (Nt did not record). Used 2-MHz 1 band x 2 Pols. with 2-bits sampling. 1024 spectral channels per IF. Eb is a reference antenna.
On: Linear polarization data.
ERI=0.47 (Jb=0.93, Eb=0.97, On=0.75, Tr=0.97, Nt=0.00) ERI*=0.92 (artificial errors. when excluding Nt, ERI=0.79)
Plots of the autocorrelations.
Comments.
On: A spur at the center of the band in R&L. Tr. Occasionally spurs in R&L.
Plots of the uncalibrated amplitude and phase against time.
Comments.
A calibrator J1743-0350 is detected, with small phase gradients.
Plots of the uncalibrated amplitude and phase against frequency
channel.
Comments.
Tr: A spur is found even if cross-power spectra in LL.
The uncalibrated amplitude and phase of the crosshand
correlations against frequency channel.
Comments.
No data.
TSYS against time.
Comments.
No problem.
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.
Jb: SEFD=90-120 Jy.
Eb: About 100% (Rpol) and 600% (Lpol) of that in EVN status table.
Mc: Roughly consistent with that in EVN status table.
Tr: About 150% of that in EVN status table. Sometimes high gain factors.
Fringe-fit phase solutions.
Comments.
Solutions with phase dirifts are seen well.
Fringe-fit delay solutions.
Comments.
Jb: Offsets of 0-40 nsec. On: Offset of -25 nsec in Rpol. Tr: Offsets usually within 10 nsec, sometimes up to 50 nsec.
Fringe-fit rate solutions.
Comments.
Offsets within 3 mHz.
Telescope bandpasses.
Comments.
Recommended to be smoothed.
Calibrated amplitude and phase against time
(a priori amplitude calibration and fringe-fit solutions applied).
Comments.
No comment.
Calibrated amplitude and phase against frequency channel.
Comments.
No comment.
Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
Comments.
No comment.
Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
Also available as a text file.
Comments.
Gain factors within 3.
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.
Jb: SEFD~36 Jy(Rpol), ~16 Jy (Lpol), too small.
Eb: About 70% (Rpol) and 400% (Lpol) of that in EVN status table.
On: 10-170% of that in EVN status table.
Tr: Roughly consistent with that in EVN status table. Sometimes high gain factors.
Residual closure phase (visibility closure phase with
model closure phase subtracted) for J1743-03.
Comments.
Almost constant closure phases.
Calibrated visibilities and the source model of
J1743-03.
Comments.
A model is consistent with observed amplitudes and phases.
Calibrated visibilities against u,v distance for
J1743-03.
Comments.
Detected in the longest baselines.
u,v coverage for
J1743-03.
Comments.
Elongated in the east-west direction up to 30M lambda.
Crude map of J1743-03 from the pipeline.
Comments.
J1743-03: Two components aligned in the NW-SE direction.