Stephen Bourke - Challenge 8

Stephen Bourke - Challenge 8

Realisticly Polarised Source

Logged on 08/24/2009 06:08:55 PM

This time the source has the polarisation parameters of the source 3C286.

MS Simulation / Dirty image

Logged on 08/25/2009 09:40:21 AM

The MS was generated in the usual fashion and a dirty image created.

Data products

SSSC8_WSRT.MS.DATA.channel.1ch.fits (header)

1x4x512x512 FITS cube, 4 planes are given below.

0-full.png

Image plane #0.

data range:-0.288555,7.32002
mean:-0.00857527
sigma:0.179892
clipping:95%
clip range:-0.288555,0.305865
1-full.png

Image plane #1.

data range:-0.0329318,0.272001
mean:-0.000298132
sigma:0.0113596
clipping:95%
clip range:-0.0225093,0.0212652
2-full.png

Image plane #2.

data range:-0.0246832,0.630032
mean:-0.000756553
sigma:0.0154826
clipping:95%
clip range:-0.0246832,0.0264665
3-full.png

Image plane #3.

data range:-0.00346002,0.00346003
mean:7.68568e-09
sigma:0.000573761
clipping:95%
clip range:-0.00114208,0.00117587

Subtraction

Logged on 08/25/2009 09:43:41 AM

Subtracting from the uncalibrated gives artifacts due to the varying gains.

Data products

SSSC8_WSRT.MS.CORRECTED_DATA.channel.1ch.fits (header)

1x4x512x512 FITS cube, 4 planes are given below.

0-full.png

Image plane #0.

data range:-0.0402206,0.0471933
mean:0.000125862
sigma:0.0114517
clipping:95%
clip range:-0.0208427,0.0234618
1-full.png

Image plane #1.

data range:-0.0383748,0.0435189
mean:3.48906e-05
sigma:0.00893691
clipping:95%
clip range:-0.0200607,0.0168075
2-full.png

Image plane #2.

data range:-0.00356039,0.0039966
mean:1.50984e-05
sigma:0.000978986
clipping:95%
clip range:-0.0018335,0.0019081
3-full.png

Image plane #3.

data range:-0.00345999,0.00345999
mean:3.97637e-11
sigma:0.000571991
clipping:95%
clip range:-0.00110152,0.00122992

Calibration and Source Subtraction

Logged on 08/25/2009 09:47:10 AM

Recompiling with Calibration options and solving for G Jones produces good results.

Data products

SSSC8_WSRT.MS.CORRECTED_DATA.channel.1ch.fits (header)

1x4x512x512 FITS cube, 4 planes are given below.

0-full.png

Image plane #0.

data range:-2.54041e-09,2.15465e-09
mean:-1.28744e-12
sigma:5.35675e-10
clipping:95%
clip range:-1.24744e-09,9.39618e-10
1-full.png

Image plane #1.

data range:-2.23275e-09,2.33956e-09
mean:-1.22154e-11
sigma:5.59611e-10
clipping:95%
clip range:-1.04502e-09,1.17416e-09
2-full.png

Image plane #2.

data range:-2.424e-10,2.52161e-10
mean:7.14334e-13
sigma:5.80275e-11
clipping:95%
clip range:-1.02338e-10,1.29004e-10
3-full.png

Image plane #3.

data range:-2.77702e-10,2.77702e-10
mean:-1.70511e-17
sigma:5.70999e-11
clipping:95%
clip range:-1.0685e-10,1.2041e-10
This log was generated by PURR version 1.0.