VS06O Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 01-09-2005
 

Summary
 
Observation code : VS06O    AIPS Version : 31DEC03   
Date of Observation : 2001/352    Difmap Version : 2.3c 
Source Name : J1224+21    vsop_difmap used : Yes 
Calibration Source(s) : J1215-17, J1337-12         
Ground telescopes : MP KA CD SH  Model Fitted to data : Yes 
Tracking Station(s) : TZ    Image made : Yes 
Correlator : Penticton         

 
Abstract
Extended north-south. There is a faint core component of about 0.2 Jy, <0.2 mas
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.200331 0.0609446 150.001 0 0 0 0.0000
0.341287 0.107101 -31.6609 2.19711 0.449323 -77.7073 0.0077
0.178800 2.46811 -3.66703 2.44092 0.434256 2.26010 0.0034
0.0454334 4.57691 10.9941 1.66589 1.00000 10.8115 0.0008
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


AIPS Data Reduction Notes
 
Task
Adverbs
CL
in
SN
in
CL
out
SN
out
Comments
FITLD clint = 0.25
digicor = -1
delcorr = -1
 
 
 
 
  
INDXR cparm = 0, 0, 0.25;
 
 
1 
 
  
ANTAB infile='antab.txt'
 
 
 
 
  
APCAL
 
 
 
1 
  
CLCAL refant=1;
1 
1 
2 
 
 Amplitude calibration solutions applied. 
FRING docal -1; dparm 2,400,400,0.5,0;aparm(7)=0.1;solint
   5,10,15
 
 
 
2,3,4 
  
FRING dparm 2,50,200,0.5,0;aparm(7)=0.1;solint
   10;refa 3,4
 
 
 
5,15 
 Try Mopra and Seshan, various window sizes. High VSOP rates (> 60mHz) 
SNEDT/CLCAL refant=4;interp 'cube';
2 
12 
3 
16 
  
SPLIT aparm(1)=2 0;
3 
 
 
 
 Av within IF 
FITTP
 
 
 
 
 Data written out for analysis in Difmap amplitude 

AIPS Input Files
ANTAB.TXT Comments
used nominal_tsys.pl

AIPS Output Files
PRTAN.LIS
LISTR.LIS
DTSUM_0.LIS
DTSUM_1.LIS
VPLOT.PS
POSSM.PS
SN_APCAL_1.PS
SN_APCAL_2.PS
UVPLT_UV.PS		 UVPLT_UVD.PS
UVPLT_UVPA.PS
SN_FRING1_DEL_1.PS
SN_FRING1_DEL_2.PS
SN_FRING1_RAT_1.PS
SN_FRING1_RAT_2.PS
SN_FRING1_SNR_1.PS
SN_FRING1_SNR_2.PS
SN_CALIB_DEL_1.PS		 SN_CALIB_DEL_2.PS
SN_CALIB_RAT_1.PS
SN_CALIB_RAT_2.PS
SN_CALIB_SNR_1.PS
SN_CALIB_SNR_2.PS
SN_CALIB_PHA_1.PS
SN_CALIB_PHA_2.PS
IMAGE.FITS


Difmap Data Reduction Notes
Phase selfcal applied? Yes
Global amplitude selfcal (gscal) applied? No
Amplitude selfcal on non-global timescales used? No
Modelfit made and saved? Yes
Image Made and saved? Yes
Comments on Difmap processing
J1337-12 does not match the short baselines of the PLS model - but would be if the resolving component resolved quicker. There appears to be a compact core (on GRT baselines). I.e. Amp Scale is ok.

J1215-17 suggests that Sheshan might be a little low - factor of 1.2? But the PLS model shows complexity. I.e. Amp Scale not changed.

Calibrated both IF's together in AIPS. File is J1224_AIPS_FITS

Model fit (and clean) has four components.

Core is <0.2 mas

Image
Ampl, Phase vs (u,v) Distance
PS (47 kb)
JPEG (42 kb)
 Ampl, Phase vs Time
PS (188 kb)
JPEG 1, 2, 3		 (u,v) Coverage
PS (27 kb)
JPEG (29 kb)
Closure Phase vs Time
PS (235 kb)
JPEG 1, 2		 Clean Image
PS (35 kb)
JPEG (51 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (47 kb)
JPEG (42 kb)
 Ampl, Phase vs Time
PS (187 kb)
JPEG 1, 2, 3		 (u,v) Coverage
PS (26 kb)
JPEG (29 kb)
Closure Phase vs Time
PS (235 kb)
JPEG 1, 2		 Image with model components
PS (32 kb)
JPEG (41 kb)

More details on the Images and Modelfits are found in this page.

Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.200331 0.0609446 150.001 0 0 0 0.0000
0.341287 0.107101 -31.6609 2.19711 0.449323 -77.7073 0.0077
0.178800 2.46811 -3.66703 2.44092 0.434256 2.26010 0.0034
0.0454334 4.57691 10.9941 1.66589 1.00000 10.8115 0.0008
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Mon Oct 10 09:48:15 UTC 2005
by db_results.pl version 0.3.