EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment EB027A. If you have any comments on this experiment please email the address below.
A detailed description of the pipeline output is available.

Last updated: Thu Jul 1 15:20:47 CEST 2004 bignall@jive.nl

General Comments. ( Brief data summary and scan listing )
This is an EVN+MERLIN continuum experiment at 6cm, recorded at 512 Mbps on 14 February 2004. There are 2 polarisations and 8 subbands, with 16 channels per subband. The data were correlated in two passes, 4 subbands at a time, and subsequently combined in the pipeline using AIPS task VBGLU. Participating stations were Ef, Wb, Jb, On, Mc, Tr, Cm, Nt. On was lost for most of the experiment due to an antenna tracking problem. Not all subbands/pols are available for Cm due to bandwidth limitations of the microwave link.

The EVN reliability indicator (ERI) for this experiment was ERI=ERI*=0.57 (Ef=1, Wb=1, Jb=0.75, On=0.07, Mc=1, Tr=0.5, Cm=0.99, Nt=0.85).

Plots of the autocorrelations .
Comments.

Plots of the uncalibrated amplitude and phase against time .
Comments.
Some data for Jb headstack 2 (IFs 5-8) are bad.

Plots of the uncalibrated amplitude and phase against frequency channel .
Comments.
Tr: signal in IFs 1-4 only.
Cm: signal in IF 4 only.

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

TSYS against time .
Comments.
Cm: none available - nominal sensitivity assumed.

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.
Tr: gain curve polynomial in ANTAB file was replaced with POLY=1, as supplied gain curve was wrong.

Fringe-fit phase solutions (including Parallactic Angle correction).
Comments.
Tr: high phase rate, but solutions look OK.

Fringe-fit delay solutions .
Comments.
There is evidently a delay difference of about 30ns between LCP and RCP channels for the reference antenna, Ef.

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.
A number of stations show significant amplitude differences between IFs.
Wb: amplitudes of IFs 7 & 8 are ~25% higher than other IFs. Cm: some extra flagging of edge channels required (first two channels of IF 4)

Naturally weighted dirty map produced before self-cal of:
OQ208: postscript , or FITS .
3C286: postscript , or FITS .
J1337+550: postscript , or FITS .
J1310+322: postscript , or FITS .
Comments.

Uniformly weighted dirty map produced before self-cal of:
OQ208: postscript , or FITS .
3C286: postscript , or FITS .
J1337+550: postscript , or FITS .
J1310+322: postscript , or FITS .
Comments.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
OQ208.
3C286.
J1337+550.
J1310+322.
Comments.

Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
OQ208: postscript , or text file .
3C286: postscript , or text file .
J1337+550: postscript , or text file .
J1310+322: postscript , or text file .
Comments.

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:
OQ208 .
3C286 (not available) .
J1337+550 .
J1310+322 (not available) .
Comments.

Calibrated visibilities and the source model of:
OQ208 .
3C286 (not available) .
J1337+550 .
J1310+322 (not available) .
Comments.

Calibrated visibilities against u,v distance for:
OQ208. postscript , or png (smaller)
3C286. postscript (not available) , or png (smaller) (not available)
J1337+550. postscript , or png (smaller)
J1310+322. postscript (not available) , or png (smaller) (not available)
Comments.

u,v coverage for:
OQ208. postscript , or png (smaller)
3C286. postscript (not available) , or png (smaller) (not available)
J1337+550. postscript , or png (smaller)
J1310+322. postscript (not available) , or png (smaller) (not available)
Comments.

OQ208: postscript , or FITS .
3C286:postscript (not available) , or FITS (not available) .
J1337+550: postscript , or FITS .
J1310+322:postscript (not available) , or FITS (not available) .
Comments.