EVN User Experiment Pipeline Feedback

Last updated: Fri Apr 29 11:12:52 CEST 2005 bignall@jive.nl

General Comments. ( Brief data summary and scan listing )
L-band NME at 18cm, observed 1 March 2005. Recorded at 256 Mbps (4x8MHz subbands, dual pol, 2-bit sampling). Correlated data have 16 frequency points per subband, 2 s integrations, cross-pols included.

The ratio of the expected to the observed number of good visibilities is estimated as ERI=ERI*=0.87 (Ef=0.99, Mc=0.6, Wb=1, On=1, Tr=1, Jb=1, Cm=1, Nt=1, Ur=0.8, Sh=0.85, Hh=1, Ro=1). Mc and Sh lost some data due to Mk5 problems, while Ur stopped recording early because their disk was full. Cm does not record the full bandwidth because of the microwave link limitations (good data are in IF3).

Plots of the autocorrelations .
Comments.
RFI at some stations:
Hh: Persistent RFI in IF1
Mc: IF2
Ro: IF4 LCP

Plots of the uncalibrated amplitude and phase against time .
Comments.
Ef off in scan 29, UT 20:52-20:57.
No fringes to Wb in IFs 1 and 2 (problem at correlator)

Plots of the uncalibrated amplitude and phase against frequency channel .
Comments.
RFI sometimes visible in cross-correlations as well

The uncalibrated amplitude and phase of the crosshand correlations against frequency channel .
Comments.

TSYS against time .
Comments.
Sh: very high Tsys for LCP

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.
On: had receiver problems, SEFD a factor of 2 higher than expected.

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

Fringe-fit delay solutions .
Comments.

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.

Naturally weighted dirty map produced before self-cal of:
4C39.25: postscript , or FITS .
J0923+3849: postscript , or FITS .
OQ208: postscript , or FITS .
0123+257: postscript , or FITS .
Comments.

Uniformly weighted dirty map produced before self-cal of:
4C39.25: postscript , or FITS .
J0923+3849: postscript , or FITS .
OQ208: postscript , or FITS .
0123+257: postscript , or FITS .
Comments.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
4C39.25.
J0923+3849.
OQ208.
0123+257.
Comments.

Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
4C39.25: postscript , or text file .
J0923+3849: postscript , or text file .
OQ208: postscript , or text file .
0123+257: 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.
On: receiver problems, used warm HEMTs. SEFD is approximately a factor of two higher than value tabulated in EVN status sheet (expected 390 Jy, was ~800 Jy for this experiment).
Sh: low sensitivity in LCP

Residual closure phase (visibility closure phase with model closure phase subtracted) for:
4C39.25 .
J0923+3849 .
OQ208 .
0123+257 .
Comments.

Calibrated visibilities and the source model of:
4C39.25 .
J0923+3849 .
OQ208 .
0123+257 .
Comments.

Calibrated visibilities against u,v distance for:
4C39.25. postscript , or png (smaller)
J0923+3849. postscript , or png (smaller)
OQ208. postscript , or png (smaller)
0123+257. postscript , or png (smaller)
Comments.

u,v coverage for:
4C39.25. postscript , or png (smaller)
J0923+3849. postscript , or png (smaller)
OQ208. postscript , or png (smaller)
0123+257. postscript , or png (smaller)
Comments.

4C39.25: postscript , or FITS .
J0923+3849: postscript , or FITS .
OQ208: postscript , or FITS .
0123+257: postscript , or FITS .
Comments.