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Last updated: Fri Nov 29 16:18:28 CET 2002
imai@jive.nl
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General Comments.
(
Brief data summary and
scan listing.)
This project consists of 9 stations: Jb, Mc, Ef, On, Nt, Tr, Sh, Cm, Wb. Used 4-MHz 4 band x 4 Pols. with 2-bits sampling.
16 spectral channels per IF. Ef is a reference antenna.
No fringe was found from Cm. Sh is available only for Lpol.
Some of plots for 1328+307 were unavailable because of only one scan and failure in self-calibration.
ERI=0.68 (Jb=0.99, Mc=0.99, Ef=0.99, On=0.89, Nt=1.00, Tr=0.96, Sh=0.47, Cm=0.00, Wb=0.89) ERI*=0.68 (artificial errors only. Sh=0.61 when perfectly successful operation. When excluding Cm, ERI*=0.88.)
Plots of the autocorrelations.
Comments.
Jb: Very low amplitudes in IF2 Rpol.
Mc: Very low (sometimes negative) amplitude in IF3 Lpol.
On: Relatively low amplitudes in IF2 Lpol.
Nt: Negative amplitudes in IF3&4 R&Lpols.
Tr: Very low amplitudes in IF3 Lpol 02:35-02:56 and IF4 Rpol 19:30-20:43. Negative amplitudes in IF1 Rpol.
Sh: Pecular profile in IF1-4 Rpol 19:30-19:53. Negative amplitudes in IF4 Rpol. Cm: Data lost 19:30-19:53. Peculiar profiles in IF1, 3, 4 Lpol. Occasionally negative amplitudes in IF3&4 Rpol.
Wb: Occasionally negative amplitudes in IF1-4 R&Lpols.
Plots of the uncalibrated amplitude and phase against time.
Comments.
Calibrators were well detected with mild phase variation.
On: Many data points were reduced in IF2 LL.
Sh: Rapid phase variation around 23:00-0:00.
Cm: Phase wrap, no detection.
Wb: Phase wrap 21:50-21:56, 23:42-23:50.
Plots of the uncalibrated amplitude and phase against frequency
channel.
Comments.
Calibrators were well detected with mild phase gradients along frequency.
Jb: Data lost 02:35-02:39.
Mc: Data lost 2:50-2:56.
On: Bad data in IF2 LL 19:30-19:42, 02:35-02:39. Data lost in IF1-4 RR 22:28-22:33, 02:50-02:57.
Tr: Data lost 19:30-19:33. Bad data in IF1 LL 22:28-22:33, 02:35-02:39, in IF1 RR 02:35-02:39, 02:50-02:57 in IF2 LL 21:03-21:07, 22:28-22:33, 23:14-23:25, 02:35-02:39, in IF3 LL 19:39-19:42, 22:40-22:44, 02:35-02:39, 02:50-02:57, in IF3 RR 00:12-00:15, 02:35-02:39.
Sh: Bad data in IF1-4 LL 19:30-19:33, 21:12-21:16, 23:36-23:57, in IF1-4 RR 19:30-19:33, 21:22-21:45, 22:40-22:44, and 23:14-23:57 (due to rapid phase variation?).
Cm: No fringe detected.
Wb: Bad data in IF1 LL 19:30-19:43, 00:12-00:26, 02:35-02:57, in IF4 LL 19:30-19:43, 21:03-21:16, 21:44-22:07, 22:40-23:57, in IF1-4 RR 02:35-02:39
The uncalibrated amplitude and phase of the crosshand
correlations against frequency channel.
Comments.
LR emission was well detected in each of IFs and pols.
TSYS against time.
Comments.
Jb: Set to Tsys=1 K.
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: Roughly consistent with that in EVN status table.
Mc: About 120% of that in EVN status table.
Ef: Roughly consistent with that in EVN status table.
On: About 300% of that in EVN status table.
Nt: Roughly consistent with that in EVN status table.
Tr: About 120% of that in EVN status table.
Sh: Roughly consistent with that in EVN status table.
Cm: Set to SEFD=136 Jy.
Wb: 160-200% of that in EVN status table.
Fringe-fit phase solutions.
Comments.
Solutions with phase drifts are seen well.
Sh: solutions were obtained only from 19:30-19:45 in IF2 RR.
Cm: No solution was found.
Fringe-fit delay solutions.
Comments.
Jb: Offsets of about -35 nsec in average.
Mc: Delays close to zero.
On: Offsets of about -5 nsec in average.
Nt: Offsets of -10 - 30 nsec.
Tr: Offsets of about 15 nsec in average.
Sh: Bad solutions 19:30-19:35.
Wb: Solutions jumped from ~200 nsec to ~0 nsec.
Fringe-fit rate solutions.
Comments.
Offsets within 2 mHz.
Sh: Bad solutions 19:30-19:35.
Wb: Solutions jumped 21:55-22:00.
Telescope bandpasses.
Comments.
Well determined in amp. and phase.
Sh: Bad solution in IF2 RR.
Calibrated amplitude and phase against time
(a priori amplitude calibration and fringe-fit solutions applied).
Comments.
Large phase drifts were well removed. There were some scans with phase wrap, which could be well picked up.
Sh: Still phase wrap, likely due to noise.
Wb: Still phase wrap in small parts of time range.
Calibrated amplitude and phase against frequency channel.
Comments.
Phase changes along frequency were well removed. But occasionally data lost.
Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
Comments.
Sh: No solution for 0016+731 and 0429+415 in IF2-4 RR.
Wb: Most of solutions were lost in IF4 LL 20:50-00:40.
Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
Also available as a text file.
Comments.
Gain factors within 2.
Tr: Gain factores around 5.0 in IF1 RR, and much higher in IF4 RR 20:10-20:50.
Wb: Sometimes gain factors larger than 10.
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: 100-130% (600% in IF2 Rpol) of that in EVN status table.
Mc: About 130% of that in EVN status table.
Ef: Roughly consistent with that in EVN status table.
On: 300-400% of that in EVN status table.
Nt: 100-200% consistent with that in EVN status table.
Tr: Roughly consistent with (4000% in IF1 Rpol and 250% in IF3 Rpol of) that in EVN status table.
Sh: Rpol is unavailable. Roughly consistent with (that in EVN status table. Difficult to check the gain in IF1&3 Lpol because of too high gain points contaminated.
Cm: Not available.
Wb: Difficult to check the gain because of too high gain points contaminated.
Residual closure phase (visibility closure phase with
model closure phase subtracted) for 0016+731.
Residual closure phase (visibility closure phase with
model closure phase subtracted) for 1328+307.
Residual closure phase (visibility closure phase with
model closure phase subtracted) for DA193.
Comments.
0016+731: Systematic closure phase variation was marginally seen.
1328+307: Not available.
DA193: Systematic closure phase variation was seen.
The target: Systematic closure phase variation was well seen.
Calibrated visibilities and the source model of
0016+731.
Calibrated visibilities and the source model of
1328+307.
Calibrated visibilities and the source model of
DA193.
Comments.
0016+731: The model is well consistent with observed amplitudes and phases.
1328+307: Not available.
DA193: The model is well consistent with observed amplitudes and phases.
The target: The model is well consistent with observed amplitudes and phases.
Calibrated visibilities against u,v distance for
0016+731.
Calibrated visibilities against u,v distance for
1328+307.
Calibrated visibilities against u,v distance for
DA193.
Comments.
0016+731: About 0.7 Jy with baselines shorter than 35M lambda, and about 0.3 Jy at 130M lambda.
1328+307: About 1.5 Jy at 11.8M lambda.
DA193: Up to 9 Jy at 15M lambda, and about 1 Jy at 140M lambda.
The target: Up to 250 Jy at 10M lambda. Detected up to 141M lambda.
u,v coverage for
0016+731.
u,v coverage for
1328+307.
u,v coverage for
DA193.
Comments.
0016+731: A central condensation elongated in the NE-SW direction up to 35M lambda, and (u,v) data points in the north-south direction around 120M lambda.
1328+307: Sparse distribution up to 12M lambda.
DA193: A central condensation elongated in the north-south direction up to 40M lambda, and (u,v) data points in the NE-SW direction around 120M lambda.
The target: A central condensation elongated in the north-south direction up to 40M lambda, and (u,v) data points in the NE-SW direction at 110-130M lambda.
Crude map of 0016+731 from the pipeline.
Crude map of 1328+307 from the pipeline.
Crude map of DA193 from the pipeline.
Comments.
0016+731: An unresolved component.
1328+307: Out of the field of view.
DA193: An unresolved component. Bright side lobes still exist.
The target: A couple of components.