VS07L Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 15-07-2004
 

Summary
 
Observation code : VS07L    AIPS Version : 31DEC03   
Date of Observation : 1999/119    Difmap Version : 2.4a 
Source Name : J0956+25/OK290    vsop_difmap used : No 
Calibration Source(s) : 1156+295,J0815+36         
Ground telescopes : HH NT GB AR TR  Model Fitted to data : Yes 
Tracking Station(s) : RZ (GZ)    Image made : Yes 
Correlator : Penticton         

 
Abstract
The second VSOP pass (GZ) has a very high rate (0.3 Hz from the delays) and the phase can not be recovered.

Source is a simple gaussian and point.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.864713 0.0120556 -109.945 0.996676 0.382389 62.9048 0.1111
0.245127 0.0150195 123.719 0.00000 1.00000 0.00000 0.0000
(*) 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. 
CLCOR opcode 'gain';antenna 0;clcorprm
   1.19,0
3 
 
3 
 
  
FRING docal -1; dparm 2,400,400,0.5,0;aparm(7)=0.1;solint
   5,10,15
refa 5;dpar 2,200,50,0.5,0;solint
   5
 
 
 
2,3,4,5 
 Changed to Noto reference 
SNEDT/SNCOR/CLCAL 'zphs' ante 1 3 6;'zrat'
   ante 1 3; 'zdel' ante 1;
interp 'ambg';ante 1,6; inter
   'poly';
2 
5,6 
3 
 
  
KRING cparm 0.5,0,0,-1,0;
3 
 
 
7,8,10 
  
CLCOR opc 'sbdl';clcorp 300,300,0;ante
   3 0
3 
 
3 
 
 correct high delay for VSOP 
FRING solint 10;dpar 2,400,100,0.5,0;timer
   0/0 22 0
3 
 
 
9,11,12 
 GZ pass has a very high rate (~300 and different delays by 6us) 
CLCAL interp 'ambg'/'cube'
3 
 
4/5 
 
  
TACOP/CLCOR clcorp -6000,-6000,0;ante
   3;bif 2;
5 
 
6 
 
 see if I can't get the second pass somehow 
KRING cparm 0.5,0,0,-1,0;
6/5 
 
 
16/17 
  
SNEDT/SNCOR
 
15 
 
18 
 only rates, and only for Ac/VSOP 
CLCAL interp 'ambg'
5 
 
7 
 
  
SPLIT aparm(1)=2 0; bchan 10;echan
   246
7 
 
 
 
 Av within IF, trim edges. 
FITTP
 
 
 
 
 Data written out for analysis in Difmap amplitude 

AIPS Input Files
ANTAB.TXT Comments
used nominal_tsys.pl

AIPS Output Files


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
0815+36 implies that Aracebo is low by 1.9 - no VSOP data so flagged Torun had very poor solutions (fitted polynomially) so flagged.

Well fitted with a simple model at the core.

Image
Ampl, Phase vs (u,v) Distance
PS (49 kb)
JPEG (44 kb)
 Ampl, Phase vs Time
PS (238 kb)
JPEG 1, 2, 3		 (u,v) Coverage
PS (27 kb)
JPEG (29 kb)
Closure Phase vs Time
PS (281 kb)
JPEG 1, 2		 Clean Image
PS (33 kb)
JPEG (45 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (49 kb)
JPEG (45 kb)
 Ampl, Phase vs Time
PS (242 kb)
JPEG 1, 2, 3		 (u,v) Coverage
PS (27 kb)
JPEG (29 kb)
Closure Phase vs Time
PS (281 kb)
JPEG 1, 2		 Image with model components
PS (34 kb)
JPEG (40 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)
0.864713 0.0120556 -109.945 0.996676 0.382389 62.9048 0.1111
0.245127 0.0150195 123.719 0.00000 1.00000 0.00000 0.0000
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Fri Aug 6 08:25:23 GMT 2004
by db_results.pl version 0.3.