3C286_CWT_LBAND.ICL001 
3C286_C.ICL001

The relevant steps below are included in the Cookbook and Pipeline in
July 2014 and later.

At both band, for flux scaling, please use dfluxpy.py to find the
flux density of 3C286 in (the centre of) each of your IFs and set this
with GETJY as well as using the model.  That will allow the
appropriate model to be used at any frequency in L or C band
reasonably accurately.

Use all CC as a model in CALIB

Ensure that the flux densities of all sources which have yet to be
determined are set to 1 0 0 0 in the SU table (not 1 1 1 1 nor 0 0 0
0).

Select best times/antennas - e.g. might want to avoid Lo, and De at
C-band, due to very different sensitivities.

The images have been tested for total intensity scaling.

No use of the polarization models has been attempted.  They could be
used in PCAL instead of the unpolarized 3C84 model, this requires the
Q and U images as well as I (I think that V is optional if it can be
assumed to be zero).  Please contact e-MERLIN staff if you want
polarized images.

Imaging in CASA also produces good results.

2014 April 7
amsr@jb.man.ac.uk

Notes:
Flux density and pol angle are inputs

L-band: 
Nominal freq 1526.995 MHZ
AIPS 
Total intensity
peak 13.030 Jy/beam, rms 0.00047 Jy/beam, dynamic range 27723
total in inner area 13.846 Jy
Beam 0".207 X 0".185
PPOL i.e. polarized intensity rms 0.00033 Jy/beam
peak 1.4209 Jy/beam i.e. 10.9%
Total in inner area 1.481 Jy i.e. 10.7%

VLA 9.9% at 1.64 GHz

Pol angle at peak pixel 33.095 deg or in peak 9 pixels 33.07 deg



C-Band
Nominal freq 5508.405 MHZ
peak 3.964 Jy/beam, rms 0.0027 Jy/beam, dynamic range 1468
Total in inner area 6.497 Jy
Beam 0".207 X 0".185
PPOL i.e. polarized intensity rms 0.0014 Jy/beam
peak 0.4592 Jy/beam i.e 11.6%
total 0.7971 Jy i.e. 12.2%

pol angle 33.50 deg or in peak 9 pixels 33.27 deg

VLA A-array (average) 2009 peak 7.316 Jy/beam , 
ppol  0.843 Jy/beam i.e. 11.5%

http://www.vla.nrao.edu/astro/calib/polar/2009/