EVN User Experiment Pipeline Feedback
Last updated: Fri Jul 17 12:27:14 CEST 2009
muehle@jive.nl
General Comments.
(
Brief data summary
and
scan listing
)
This is the line pass of EM064D (1 band, 2 pols, each with 1024 frequency points).
C band (5cm) line and continuum phase-referencing experiment, observed on 11 March 2009. The data rate was 128 Mbps (16 x 2 MHz subbands, dual polarization, two-bit sampling). The target source 'I20126' was calibrated using the phase-reference source 'J2007+4029'. 'J2005+7752' was observed as fringe finder and calibrator. In this pipeline reduction, Ef served as reference antenna and as plot reference, i.e. the plots show baselines to Ef.
8 EVN stations participated in this experiment: Cm, Ef, Jb (MkII), Mc, Nt, On, Tr, and Wb (single dish). Due to the limitations of the microwave link, not all subbands of Cm were recorded. Ef was out for a pointing check at 06:17-06:29 UT and had to do a full Az turn at 07:50-08:05 UT after having reached its Az limits. At Jb, the MkII telescope was used for these observations. Mc reported that the IF2 channel had less power than nominal. At Nt, the elevation of the sources was beyond the upper limit of thetelescope at 07:40-08:10 UT. As usual at this frequency, a single antenna was used at Wb.
The EVN reliability indicator (ERI) for this experiment was
ERI = 1.0 . ERI* = 1.0 .
(Cm=1, Ef=1, Jb=1, Mc=1, Nt=1, On=1, Tr=1, Wb=1)
Plots of the autocorrelations
Comments.
some low-level RFI at (almost) all stations; noisy bandpass/spikes in Mc/RCP (before ~08:00 UT) and Tr/LCP; 210 pages
plots of the uncalibrated amplitude and phase
against time
Comments.
Ef-On, Ef-Nt, Ef-Tr: some variation in amplitude => small-scale structure?; 4 pages
Plots of the uncalibrated amplitude and phase
against frequency channel
Comments.
looking good: stable bandpasses, phases can be followed in the calibrators; scans #69-71 not plotted, double-check scan#72; 194 pages
The uncalibrated amplitude and phase of the crosshand
correlations against frequency channel
(not available)
Comments.
TSYS against time
Comments.
Cm: T_sys=1 (microwave link); Wb: small jump at ~08:30 UT; Jb: RCP channel shows brief disturbance at ~05:30 UT, LCP channel at ~07:15 UT; On: small jump at ~08:30 UT in both pols; Mc: first data points in LCP channel very high (outliers) => flag?; Tr: lots of scatter at ~07:55-08:30 UT; 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.
nothing unusual deteced; 2 pages
Fringe-fit phase solutions
(including Parallactic
Angle correction).
Comments.
refant=Ef, drift in phases reflects the parallactic angle correction; looks ok; 2 pages
Fringe-fit delay solutions
Comments.
refant=Ef; except for Jb/R+L and Tr/R, delays of < 20 nanoseconds; 2 pages
Fringe-fit rate solutions
Comments.
refant=Ef; rates of the order of a few milliHertz; 2 pages
Telescope bandpasses
Comments.
looking ok; 2 pages
Calibrated amplitude and phase against time
(a
priori amplitude calibration and fringe-fit solutions applied).
Comments.
looking ok; 4 pages
Calibrated amplitude and phase against frequency
channel
Comments.
scan #59 and scans #96-71 not plotted, please double-check scan #72; 194 pages
Naturally weighted dirty map (not useful for bright sources)
produced before self-cal of:
I20126:
pdf
, or
FITS
.
J2007+4029: pdf (not available)
, or
FITS (not available)
.
J2005+7752: pdf (not available)
, or
FITS (not available)
.
Comments.
Uniformly weighted dirty map (not useful for bright sources)
produced before self-cal of:
I20126:
pdf
, or
FITS
.
J2007+4029: pdf (not available)
, or
FITS (not available)
.
J2005+7752: pdf (not available)
, or
FITS (not available)
.
Comments.
Phase corrections applied to a priori calibrated and
fringe-fitted data by self-calibration.
I20126 (not available)
.
J2007+4029
.
J2005+7752
.
Comments.
refant=Ef; phase corrections within a few tens of degrees; 2 pages per source
Amplitude corrections applied to a priori calibrated and
fringe-fitted data by self-calibration.
I20126: pdf (not available)
, or
text file (not available)
, or
statistical summary (not available)
.
J2007+4029:
pdf
, or
text file
, or
statistical summary
.
J2005+7752:
pdf
, or
text file
, or
statistical summary
.
Comments.
Nt: double-check values at 08:00-08:30 UT; 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.
nothing unexpected detected; 2 pages
Residual closure phase (visibility closure phase with model closure phase subtracted) for:
I20126 (not available)
.
J2007+4029
.
J2005+7752
.
Comments.
looking ok; 12 pages per source
Calibrated visibilities and the source model of:
I20126 (not available)
.
J2007+4029
.
J2005+7752
.
Comments.
looking very good; 4 pages per source
Calibrated visibilities against u,v distance for:
I20126:
pdf
, or
png
.
J2007+4029:
pdf
, or
png
.
J2005+7752:
pdf
, or
png
.
Comments.
u,v coverage for:
I20126:
pdf
, or
png
.
J2007+4029:
pdf
, or
png
.
J2005+7752:
pdf
, or
png
.
Comments.
Crude maps of sources:
I20126:
pdf
, or
FITS
.
J2007+4029:
pdf
, or
FITS
.
J2005+7752:
pdf
, or
FITS
.
Comments.