VS10H (VT761 and VT764) Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 13-09-2005
 

Summary
 
Observation code : VS10H    AIPS Version : 31DEC03   
Date of Observation : 1998/343    Difmap Version : 2.3c 
Source Name : J0449+11    vsop_difmap used : Yes 
Calibration Source(s) : 0420-014         
Ground telescopes : 1:Hh, Mp, Se, Ho, 2:Se, Mp, Ho, Ka, Hh,  Model Fitted to data : Yes 
Tracking Station(s) : 1:Nz, Uz 2:Nz, UZ    Image made : Yes 
Correlator : Penticton/Mitaka         

 
Abstract
Combine the test observations VT761 (Penticton 344) and VT764 (Mitaka 343). Neither have space fringes. Correlators agree pretty well.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
1.53605 0.0149389 91.0529 0.669630 0.300000 84.8877 0.5572
(*) 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 
  
ACCOR solint 5
 
 
 
2 
  
CLCAL refant=1;
1 
1,2 
2,3 
 
 Amplitude calibration solutions applied. 
CLCOR opcode 'gain';antenna 0;clcorprm
   1.063,0
3 
 
3 
 
  
FRING docal -1; dparm 2,400,400,0.5,0;aparm(7)=0.1;solint
   5,10,15
 
 
 
3,4,5,6 
 Full range searched 
SNEDT/CLCAL refant=1;
3 
3 
4 
7 
  
KRING dparm
   2,0,0,0.5,0;aparm(7)=0.1;solint
4 
 
 
8 
 Nothing, not nada 
SPLIT aparm(1)=2 0;
4 
 
 
 
 Av within IF 
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. 
CLCOR opcode 'gain';antenna 0;clcorprm
   1.19,0
2,3,4 
 
2,3,4 
 
  
FRING docal -1; dparm 2,400,400,0.5,0;aparm(7)=0.1;solint
   5,10,15
 
 
 
2,3,(4),5,(7,8) 
 Full range searched. Lots of stuff ups. Tired. 
SNEDT/CLCAL refant=1;
2 
3 
3 
6 
  
KRING dparm
   2,0,0,0.5,0;aparm(7)=0.1;solint
3 
 
 
9 
 Nothing, not nada 
SPLIT aparm(1)=2 0;
3 
 
 
 
 Av within IF 
DBCON
 
 
 
 
 Combine Vt761 and Vt764 
FITTP
 
 
 
 
 Data written out for analysis in Difmap amplitude 

AIPS Input Files
Comments
used nominal_tsys.pl

AIPS Output Files
VPLOT.PS POSSM.PS


Difmap Data Reduction Notes
Phase selfcal applied? Yes
Global amplitude selfcal (gscal) applied? Yes
Amplitude selfcal on non-global timescales used? No
Modelfit made and saved? Yes
Image Made and saved? Yes
Comments on Difmap processing
Missed out the CLCOR, after correcting the CLCAL stage. Added with a late scala.

0420-014: Looks like a (1.4Jy) point source with very poor antenna recording. Kashima down by 3. PLS down by ~ 50% (2.4+0.75)/(1.4+0.3).

J0449+11: No space data, which is roughly in-line with the expected flux (~0.1 Jy) on these baselines. The amp scale is so poor it is not possible to extract much information. Gscale blows up the radpl. It looks like there is complex structure there (or the amp scales make no sense what so ever). There is signs that the extension is the same as the PLS. The flux levels from the correlators look very similar. It is resolving. I don't think we can say more than this. The model tends towards a line, so I widened it to within the limits of the data (=0.2 mas width).

Image
Ampl, Phase vs (u,v) Distance
PS (136 kb)
JPEG (56 kb)
 Ampl, Phase vs Time
PS (558 kb)
JPEG 1, 2, 3, 4, 5, 6		 (u,v) Coverage
PS (70 kb)
JPEG (31 kb)
Closure Phase vs Time
PS (695 kb)
JPEG 1, 2, 3, 4		 Clean Image
PS (34 kb)
JPEG (46 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (136 kb)
JPEG (56 kb)
 Ampl, Phase vs Time
PS (557 kb)
JPEG 1, 2, 3, 4, 5, 6		 (u,v) Coverage
PS (70 kb)
JPEG (31 kb)
Closure Phase vs Time
PS (693 kb)
JPEG 1, 2, 3, 4		 Image with model components
PS (33 kb)
JPEG (39 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)
1.53605 0.0149389 91.0529 0.669630 0.300000 84.8877 0.5572
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Tue Sep 20 11:29:25 UTC 2005
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