EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment EH010. If you have any comments on this experiment please email the address below.
A detailed description of the pipeline output is available.

Last updated: Fri Apr 22 16:38:35 CEST 2005 zparagi@jive.nl

General Comments. ( Brief data summary and scan listing )
L-band continuum phase-referencing experiment, observed on 9 March 2005. The data rate was 128 Mbps which resulted in 2x8 MHz channels in each polarizations. The target, IRAS17526+3253 was phase-referenced to J1748+3404. 3C273, 3C345 and 3C454.3 were fringe-finders, 3C286 was observed for MERLIN amplitude calibration.

There were 11 EVN stations in this experiment: Ef, Wb, Jb1, Cm, On25, Mc, Nt, Tr, Ur, Sh and Hh. In Mc observations stopped between 07:29-09:15 UT because of antenna problems. Nt had pointing problems (sources near zenith) between 5:00-6:00 UT. The Lovell telescope started at 23:01:22 UT; several calibrator scans were edited out from the schedule because of the slewing limitations. Hh ended experiment early (~8 UT). Shanghai lost scans 10-13. Tr seemed to have a sensitivity problem (see below).

The EVN Reliability Indicator (the ratio of the expected to the observed number of good visibilities) is estimated as ERI=ERI*=0.694 (Ef=1.0, Wb=0.8, Jb1=0.95, Cm=1.0, On=1.0, Mc=0.9, Nt=1.0, Tr=0.2, Ur=1.0, Sh=0.5, Hh=0.9). This does not count the phase-reference scan losses at Jodrell Bank due to the telescope slewing limitations, which was known before the observations.

Late note: the no fringes in Sh L1/R1 channels was related to a correlator problem. A new flag file was made.

Plots of the autocorrelations .
Comments.
Some RFI in On L2/R2. Weak RFI in Mc R1.

Plots of the uncalibrated amplitude and phase against time .
Comments.
Wb: no fringes at the beginning hour, and about 1h data are missing around 9 UT.
Mc: data missing around 8 UT (see above).
Hh: sources below horizon at start; stopped for a short time at around 8 UT; finished a bit early.
Sh: trouble with L1/R1? (BBC#1,#2); "holes" in data indicate sources unavailable

Plots of the uncalibrated amplitude and phase against frequency channel .
Comments.

The uncalibrated amplitude and phase of the crosshand correlations against frequency channel .
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.
Torun seems to be much less sensitive than expected. See the EVN Status Table.

Fringe-fit phase solutions (including Parallactic Angle correction).
Comments.

Fringe-fit delay solutions .
Comments.
Tr: there were large variations in residual delay (40-80 ns) during the experiment - this may indicate a MASER problem (although the rates were very low); after the first hour, only the bright fringe-finders were detected

Fringe-fit rate solutions .
Comments.

Telescope bandpasses .
Comments.

Calibrated amplitude and phase against time (a priori amplitude calibration and fringe-fit solutions applied).
Comments.
Tr: after the first hour, only the bright fringe-finders were detected
Sh: no fringes in L1/R1, corresponding to BBCs #1 and #2

Calibrated amplitude and phase against frequency channel .
Comments.

Naturally weighted dirty map produced before self-cal of:
J1748+3404: postscript , or FITS .
3C345: postscript , or FITS .
3C273: postscript , or FITS .
3C454.3: postscript , or FITS .
3C286: postscript , or FITS .
Comments.

Uniformly weighted dirty map produced before self-cal of:
J1748+3404: postscript , or FITS .
3C345: postscript , or FITS .
3C273: postscript , or FITS .
3C454.3: postscript , or FITS .
3C286: postscript , or FITS .
Comments.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
J1748+3404.
3C345.
3C273.
3C454.3.
3C286.
Comments.

Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
J1748+3404: postscript , or text file .
3C345: postscript , or text file .
3C273: postscript , or text file .
3C454.3: postscript , or text file .
3C286: postscript , or text file .
Comments.
Torun has variable, very large corrections

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.
Tr was apparently very insensitive

Residual closure phase (visibility closure phase with model closure phase subtracted) for:
J1748+3404 .
3C345 .
3C273 .
3C454.3 .
3C286 .
Comments.

Calibrated visibilities and the source model of:
J1748+3404 .
3C345 .
3C273 .
3C454.3 .
3C286 .
Comments.

Calibrated visibilities against u,v distance for:
J1748+3404. postscript , or png (smaller)
3C345. postscript , or png (smaller)
3C273. postscript , or png (smaller)
3C454.3. postscript , or png (smaller)
3C286. postscript , or png (smaller)
Comments.

u,v coverage for:
J1748+3404. postscript , or png (smaller)
3C345. postscript , or png (smaller)
3C273. postscript , or png (smaller)
3C454.3. postscript , or png (smaller)
3C286. postscript , or png (smaller)
Comments.

J1748+3404: postscript , or FITS .
3C345: postscript , or FITS .
3C273: postscript , or FITS .
3C454.3: postscript , or FITS .
3C286: postscript , or FITS .
Comments.