C2050 G309

G309 (C2050 Candidate)

April 2009

  • Details of observations can be found here
  • G309 was observed at 33/35 GHz, 44/46 GHz, 93/95 GHz
  • Phase calibrator was 1613-586
  • Flux calibrator was Uranus at all frequencies
  • Only including data that was observed between 30 <= elevation <= 90 degrees

Reduction

  • ATLOD
  • UVSPLIT
    • options=nosource
  • UVFLAG
    • for each frequency
    • select=auto / edge=100 / common bad CABB channels
  • UVSPLIT
    • for each frequency
  • MFCAL
    • 1253-055 as bandpass calibrator
    • interval=0.1, refant=2
  • GPCOPY
    • vis=1253-055, out=uranus
  • MFBOOT
    • vis=uranus,1253-055, select=source(uranus), clip=0.5
  • GPCOPY
    • vis=1253-055, out=1613-586
  • MFCAL
    • vis=1613-586, interval=0.1, refant=2, options=nopassol
  • GPBOOT
    • vis=1613-586, cal=1253-055
  • GPCOPY
    • vis=1613-586, out=g309

33/35 GHz

This source appears resolved, as the flux on CA06 baselines is much lower than on the smaller baselines.

g309_33ghz_uvdist-amp.png

The phase calibrator does not show this behaviour.

1613-586_33ghz_uvdist-amp.png

Looking at the smaller baselines for G309 reveals that it looks point-like for baselines less than 168m in length. We'll need to investigate exactly what configurations this source will be useful in.

g309_33ghz_uvdist-amp_noca06.png

Doing the same reduction at 35 GHz, I decided to show the averaged uvplt output (ie. no options=nofqav).

g309_35ghz_uvdist-amp_noca06.png

It looks here as though G309 is quite resolved as well. I don't think I'm going to waste more time reducing G309 for this epoch.

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