EVN User Experiment Pipeline Feedback
Pipeline feedback for experiment ES042C.
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address below.
Last updated: Mon Jul 29 16:37:23 CEST 2002
imai@jive.nl
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General Comments.
(
Brief data summary and
scan listing.)
This project consists of 6 stations: Ef, Jb, Mc, Tr, Wb, On. Used 8-MHz 2 bands x 2 Pols. Ef is a reference antenna.
Data from Cm were lost. Data from On, Jb, Tr were lost partially.
ERI=0.58 (Ef=1.00, Jb=0.73, Mc=0.98, Tr=0.87, Wb=1.00, On=0.95, Cm=0.0), ERI*=0.58 (artificial errors only).
Plots of the autocorrelations.
Comments.
Wb: too high amplitude at band centers, RFI?
Mc: Occasionally RFIs.
Plots of the uncalibrated amplitude and phase against time.
Comments.
Low amplitudes at the beginnings (sometimes ends) of scans. Ef(all baselines): phase wrap 03:10.
Jb: phase wrap 00:30-01:40, 06:20-10:00.
Plots of the uncalibrated amplitude and phase against frequency
channel.
Comments.
Sources were detected very clearly. Small phase gradients with frequency.
The uncalibrated amplitude and phase of the crosshand
correlations against frequency channel.
Comments.
No data.
TSYS against time.
Comments.
Ef: High Tsys 23:50.
Jb: Hight Tsys 23:50.
Mc: Data wrap in IF2 00:20-00:40.
Wb: High Tsys 23:50.
On: High Tsys 23:10, data lost 08:50-09:30.
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.
Ef, Wb, On: Consistent with that in EVN status table.
Mc, tr: Consistent with that in EVN status table. Getting worse 06:00-09:30.
Jb: 150% of that in EVN status table.
Fringe-fit phase solutions.
Comments.
No comment.
Fringe-fit delay solutions.
Comments.
Jb: A offset ~6 nsec in average.
Mc: A offset ~12 nsec in average.
Tr: A offset ~20 nsec in average.
Wb: A offset ~20 nsec in average.
On: Stable within 4 nsec.
Fringe-fit rate solutions.
Comments.
Stable within 4 mHz.
Telescope bandpasses.
Comments.
Good solutions.
Calibrated amplitude and phase against time
(a priori amplitude calibration and fringe-fit solutions applied).
Comments.
Still phase wrap at a couple of times.
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.
Occationally phase jumps.
Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
Also available as a text file.
Comments.
Large (>4) amplitude correction factors 07:40.
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.
Ef: 20-180% of that in EVN status table.
Jb: 10-150% of that in EVN status table.
Mc, Tr: Roughly consistent with that in EVN status table. Large gain factors 07:40-07:50.
Wb: Roughly consistent with that in EVN status table. Large gain factors 09:10-09:20.
Residual closure phase (visibility closure phase with
model closure phase subtracted) for 3C286.
Residual closure phase (visibility closure phase with
model closure phase subtracted) for J1740+5211.
Residual closure phase (visibility closure phase with
model closure phase subtracted) for JVS1215+34.
Residual closure phase (visibility closure phase with
model closure phase subtracted) for JVS1349+53.
Residual closure phase (visibility closure phase with
model closure phase subtracted) for JVS1506+37.
Comments.
Occasionally closure phase wrap.
Calibrated visibilities and the source model of
3C286.
Calibrated visibilities and the source model of
J1740+5211.
Calibrated visibilities and the source model of
JVS1215+34.
Calibrated visibilities and the source model of
JVS1349+53.
Calibrated visibilities and the source model of
JVS1506+37.
Comments.
For 3C286 and J1740+5211: no comment.
For JVS1215+34: Well consistent with a model in phase and amplitude.
For JVS1349+53: Well consistent with a model in phase and amplitude.
For JVS1506+73: Well consistent with a model in phase and amplitude.
Calibrated visibilities against u,v distance for
3C286.
Calibrated visibilities against u,v distance for
J1740+5211.
Calibrated visibilities against u,v distance for
JVS1215+34.
Calibrated visibilities against u,v distance for
JVS1349+53.
Calibrated visibilities against u,v distance for
JVS1506+37.
Comments.
Detected up to 8M rambda in all sources.
u,v coverage for
3C286.
u,v coverage for
J1740+5211.
u,v coverage for
JVS1215+34.
u,v coverage for
JVS1349+53.
u,v coverage for
JVS1506+37.
Comments.
For 3C286: and J1740+5211: Small numbers of (u,v) points, but well distributed in NS and EW directions up to 6M rambda.
For JVS1215+34, JVS1349+53, JVS1506+73: Well distributed in NS and EW directions up to 8M rambda.
Crude map of 3C286 from the pipeline.
Crude map of J1740+5211 from the pipeline.
Crude map of JVS1215+34 from the pipeline.
Crude map of JVS1349+53 from the pipeline.
Crude map of JVS1506+37 from the pipeline.
Comments.
For 3C286: An unresolved core.
For J1740+5211: Large sidelobes.
For JVS1215+34: An unresolved core.
For JVS1349+53: An resolved core and another component. large sidelobes.
For JVS1506+73: An unresolved core.