EVN User Experiment Pipeline Feedback
Last updated: Tue Jun 10 19:16:03 CEST 2008
muehle@jive.nl
General Comments.
(
Brief data summary
and
scan listing
)
line pass
M band phase-referencing experiment, observed on 15 March 2008. The data were correlated in separate continuum and line passes, which produced separate sets of FITS files. The data rate was 32 Mbps (4 X 2 MHz subbands, dual polarization, two-bit sampling). This pipelining (EM058B_2) corresponds to the line pass (lower sidebands only, 2 polarizations, each with 1024 frequency points, 1 sec integration time). The target source '05358+35' was calibrated using the phase-reference source 'J0530+3723'. '3C84' and 'DA193' were also observed as calibrators. 'DA193' was the fringe finder. The solint was 3 min, i.e. set to the typical scan length of the phase calibrator. Ef served as reference antenna. The plots show baselines to either Ef or Mc.
8 stations participated: Cm Ef Wb On Jb Mc Nt and Tr. Tr did not observe due to the failure of a resolver in one of the azimuth drives. Ef was not on source for a few minutes between 20:29 and 20:39 UT. Nt did not observe at 16:40 - 17:33 UT, because the source elevation was too high. Wb reported that BBC#01 was unstable, which led to the loss of the LCP data in both subbands, with the possible exception of the data observed at ~20:10 - 20:50 UT.
The EVN reliability indicator (ERI) for this experiment was
ERI = 0.64 . ERI* = 0.64 .
(CM=1, EF=1, WB=0.5, ON=1, JB=1, MC=1, NT=1, TR=0)
Plots of the autocorrelations
Comments.
some low to intermediate level RFI at all stations; Ef missing 20:26:42-20:37:42; Wb/LL: bandpass looks ok at 20:11:13-20:55:41, else flagged or showing strong pulses/RFI; 460 pages
plots of the uncalibrated amplitude and phase
against time
Comments.
plots look ok; about constant amplitudes, phases can be followed in the calibrators; 6 pages
Plots of the uncalibrated amplitude and phase
against frequency channel
Comments.
plots look ok; stable bandpasses, flat phases for calibrators; 661 pages
The uncalibrated amplitude and phase of the crosshand
correlations against frequency channel
(not available)
Comments.
no cross-polarizations
TSYS against time
Comments.
Wb/R: ~100K jump at ~15:00, L: T_sys~0 except at ~17:00 and 20:10-20:50; On/R+L: ~100K jump at ~17:10; 2 pages
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.
plots look ok; similar to T_sys against time; Nt: gain rises towards high-elevation limit; 2 pages
Fringe-fit phase solutions
(including Parallactic
Angle correction).
Comments.
plots look ok; Ef: reference antenna, drift in R and L shows the effect of the parallactic angle correction (see also EM058A); 2 pages
Fringe-fit delay solutions
Comments.
plots look ok; delays of the order of tens of nanoseconds; 2 pages
Fringe-fit rate solutions
Comments.
plots look ok; rate solutions of the order of a few mHz; 2 pages
Telescope bandpasses
Comments.
telescope bandpasses after calibration, look ok: amplitudes ~1, phases close to zero, except at the edges of the bandpasses; 2 pages
Calibrated amplitude and phase against time
(a
priori amplitude calibration and fringe-fit solutions applied).
Comments.
plots look ok: phases around zero and constant amplitudes in the calibrator sources; 6 pages
Calibrated amplitude and phase against frequency
channel
Comments.
plots look ok; please note that each plot auto-scales, thus the scales differ significantly; 641 pages
Naturally weighted dirty map (not useful for bright sources)
produced before self-cal of:
J0530+3723: pdf (not available)
, or
FITS (not available)
.
05358+35:
pdf
, or
FITS
.
3C84: pdf (not available)
, or
FITS (not available)
.
DA193: pdf (not available)
, or
FITS (not available)
.
Comments.
Uniformly weighted dirty map (not useful for bright sources)
produced before self-cal of:
J0530+3723: pdf (not available)
, or
FITS (not available)
.
05358+35:
pdf
, or
FITS
.
3C84: pdf (not available)
, or
FITS (not available)
.
DA193: pdf (not available)
, or
FITS (not available)
.
Comments.
Phase corrections applied to a priori calibrated and
fringe-fitted data by self-calibration.
J0530+3723
.
05358+35 (not available)
.
3C84
.
DA193
.
Comments.
plots look ok, just a few outliers in the data; 2 pages per source
Amplitude corrections applied to a priori calibrated and
fringe-fitted data by self-calibration.
J0530+3723:
pdf
, or
text file
, or
statistical summary
.
05358+35: pdf (not available)
, or
text file (not available)
, or
statistical summary (not available)
.
3C84:
pdf
, or
text file
, or
statistical summary
.
DA193:
pdf
, or
text file
, or
statistical summary
.
Comments.
plots and statistics look ok, gains at about 1, Nt gain rises close to the high-elevation limit; 2 pages per source
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/L+R: jump at ~17:10, Cm, Jb, Mc: a few brief jumps/dips in all subbands; 2 pages
Residual closure phase (visibility closure phase with model closure phase subtracted) for:
J0530+3723
.
05358+35 (not available)
.
3C84
.
DA193
.
Comments.
plots including Wb noisier, probably because of bad LCP; plots including Nt: closure phases noisier close to high-elevation limit; 7 pages per source
Calibrated visibilities and the source model of:
J0530+3723
.
05358+35 (not available)
.
3C84
.
DA193
.
Comments.
plots look ok; 6 pages per source
Calibrated visibilities against u,v distance for:
J0530+3723:
pdf
, or
png
.
05358+35:
pdf
, or
png
.
3C84:
pdf
, or
png
.
DA193:
pdf
, or
png
.
Comments.
u,v coverage for:
J0530+3723:
pdf
, or
png
.
05358+35:
pdf
, or
png
.
3C84:
pdf
, or
png
.
DA193:
pdf
, or
png
.
Comments.
Crude maps of sources:
J0530+3723:
pdf
, or
FITS
.
05358+35:
pdf
, or
FITS
.
3C84:
pdf
, or
FITS
.
DA193:
pdf
, or
FITS
.
Comments.