VS04U1 Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 02-08-2003
 

Summary
 
Observation code : VS04U1    AIPS Version : 31DEC03   
Date of Observation : 2003/9    Difmap Version : 2.4a 
Source Name : J0743-67    vsop_difmap used : No 
Calibration Source(s) : J0635-75         
Ground telescopes : HO HT MP  Model Fitted to data : Yes 
Tracking Station(s) : UZ    Image made : No 
Correlator : Penticton         

 
Abstract
Hobart misses most of experiment. DQA has no space fringes. Mopra is low. Poor delay solutions? Very noisy. Some unidentified signal loss at this antenna. Wrong polarisation? Wrong pointing?

Failure, but for comparison with VS04U Mopra is increased by 4. This allows a simple Gaussian to be fitted. The VS04U model also fits, but the number of parameters is unjustifiable.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.384737 0.0805347 -167.144 0.675819 1.00000 0.00000 0.0411
(*) 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. Hart as ref 
FRING doca -1; dparm
   2,0,0,0.5,0;aparm(7)=0.1;solint
5,10,15;solint 10;refan 3
 
 
 
2,3,4,5 
 Full range searched 
SNEDT/SNCOR ante 4 ; opc
   'zdel','zrat','zphs'
 
4 
 
6 
 Flagged bad GRTs and Zero'ed VSOP sols 
CLCAL refant=1;
2 
6 
3 
 
  
KRING cparm
   2,0,0,0.5,0;aparm(7)=0.1;solint
3 
 
 
7 
 Still no VSOP fringes. 
SPLIT aparm(1)=2 0;
3 
 
 
 
 Av within IF 
FITTP
 
 
 
 
 Data written out for analysis in Difmap 

AIPS Input Files
ANTAB.TXT Comments
- None -

AIPS Output Files
DTSUM_1.LIS
PRTAN.LIS
LISTR.LIS
DTSUM_0.LIS
DTSUM_1.LIS~
UVPLT_UV.PS
VPLOT.PS
POSSM.PS
UVPLT_UVD.PS
UVPLT_UVPA.PS
SN_APCAL_AMP_2.PS		 SN_APCAL_AMP_1.PS
SN_FRING01_DEL_1.PS
SN_FRING01_DEL_2.PS
SN_FRING01_RAT_1.PS
SN_FRING01_RAT_2.PS
SN_FRING01_SNR_1.PS
SN_FRING01_SNR_2.PS
SN_FRING02_DEL_1.PS
SN_FRING02_DEL_2.PS
SN_FRING02_RAT_1.PS
SN_FRING02_RAT_2.PS		 SN_FRING02_SNR_1.PS
SN_FRING02_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


Difmap Data Reduction Notes
Phase selfcal applied? No
Global amplitude selfcal (gscal) applied? No
Amplitude selfcal on non-global timescales used? No
Modelfit made and saved? Yes
Image Made and saved? No
Comments on Difmap processing
Hart-Mopra is very low ~ factor of 4 less than identical Hart-Hob. Failure.

Increased gain to Mopra by 4 to compare with VS04U. The VS04U model fits the data, but a simple Gaussian is better for this data set. Not enough data for a selfcal.

Modelfit
Ampl, Phase vs (u,v) Distance
PS (24 kb)
JPEG (33 kb)
 Ampl, Phase vs Time
PS (116 kb)
JPEG 1, 2		 (u,v) Coverage
PS (14 kb)
JPEG (25 kb)
Closure Phase vs Time
PS (94 kb)
JPEG 1		 Image with model components
PS (30 kb)
JPEG (38 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)
0.384737 0.0805347 -167.144 0.675819 1.00000 0.00000 0.0411
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Sun Oct 10 16:09:28 GMT 2004
by db_results.pl version 0.3.