EVN User Experiment Pipeline Feedback


Pipeline feedback for experiment EJ016B. If you have any comments on this experiment please email the address below.
A detailed description of the pipeline output is available.

Last updated: Tue Aug 2 20:56:01 CEST 2016 burns@jive.eu

General Comments. ( Brief data summary and scan listing )
EJ016A, L-band VLBI experiment on 2016 March 03. Participating telescopes were Jb, Wb, Ef, Mc, O8, T6, Ur, Tr, Sv, Zc, Bd, Sr, Ro. You can find information on individual stations at: http://www.evlbi.org/user_guide/EVNstatus.txt.


The EVN reliability indicator (ERI) for this experiment was ERI = 0.8 . ERI* = 0.8 . (Jb=1, Wb=1, Ef=1, Mc=1, Nt=0, O8=1, T6=0, Ur=1, Tr=1, Sv=1, Zc=0.6, Bd=1, Sr=1, Ro=1)

Plots of the autocorrelations
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Note that Robledo has LL and RR in this plot. Robledo does not have an RR receiver so we are actually seeing a duplicated LL. This false RR will gdrop out during ANTAB.

Plots of the uncalibrated amplitude and phase against time
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No unacounted missing data (details of which given in the letter to the PI)

Plots of the uncalibrated amplitude and phase against frequency channel
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The uncalibrated amplitude and phase of the crosshand correlations against frequency channel (not available)
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TSYS against time
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The station's real Tsys info for Zc resulted in loss of more than half of the data. So I replaced it with full but flat Tsys readings. This is common practice for when there is no Tsys (or bad Tsys). Amplitude calibration will sort this out, especially Amp selfcal.

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).
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Fringe-fit phase solutions (including Parallactic Angle correction).
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Fringe-fit delay solutions
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It seems like the LCP receiver at Zc has some trouble. I was able to save the LCP using a modified TSYS table however RCP seems to be unretreivable. On inspection of the corrolator outputs, indeed the RCP correlation aplitude is roughly half that of the LCP. In conclusion, the Zc RCP survives the ampcal stage of the pipeline but fails for much of the FRING results, hinting at a weak signal.

Fringe-fit rate solutions
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Telescope bandpasses
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Calibrated amplitude and phase against time (a priori amplitude calibration and fringe-fit solutions applied).
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Calibrated amplitude and phase against frequency channel
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Jb, Ro not seen in the earlier pages of the ps file due to missed scans, try looking at pages 167-168 to see them.

Naturally weighted dirty map (not useful for bright sources) produced before self-cal of:
: pdf (not available) , or FITS (not available) .
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Uniformly weighted dirty map (not useful for bright sources) produced before self-cal of:
: pdf (not available) , or FITS (not available) .
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Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
(not available) .
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Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
: pdf (not available) , or text file (not available) , or statistical summary (not available) .
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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).
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Residual closure phase (visibility closure phase with model closure phase subtracted) for:
(not available) .
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Calibrated visibilities and the source model of:
(not available) .
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Calibrated visibilities against u,v distance for:
: pdf (not available) , or png (not available) .
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u,v coverage for:
: pdf (not available) , or png (not available) .
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Crude maps of sources:
: pdf (not available) , or FITS (not available) .
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The bright calibrator and reference sources are clearly imaged.