VS11S1 Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 12-09-2004
 

Summary
 
Observation code : VS11S1    AIPS Version : 31DEC03   
Date of Observation : 2002/117    Difmap Version : 2.4a 
Source Name : J0820-12    vsop_difmap used : No 
Calibration Source(s) : J0811+01         
Ground telescopes : KA HO MP  Model Fitted to data : Yes 
Tracking Station(s) : UZ    Image made : Yes 
Correlator : Penticton         

 
Abstract
Two component source which agrees with PLS.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.0632577 0.970209 79.0569 0.351273 1.00000 0.00000 0.0250
0.228537 0.0595933 -117.424 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
   1.063,0
3 
 
3 
 
  
FRING refa 3;dparm 2,400,400,0.5,0;aparm(7)=0.1;solint
   5,10,15
 
 
 
2,3,4 
 Full range searched 
SNEDT/SNSMO/CLCAL refant=3;smoty 'dela';bparm(4)=2;cparm
   0
2 
3 
3 
5 
 2 hour smoothing just on the delay 
FRING dparm 2,30,30,0.5,0;solint
   5;refa 3;flagv -1
 
 
 
6 
 Good data ebing flagged. 
CLCAL refant=1;
2 
6 
4 
 
  
SPLIT aparm(1)=2 0;
4 
 
 
 
 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
DTSUM_0.LIS
DTSUM_1.LIS
LISTR.LIS
POSSM.PS
SN_APCAL_AMP_1.PS
SN_APCAL_AMP_2.PS		 SN_CALIB_DEL_1.PS
SN_CALIB_DEL_2.PS
SN_CALIB_PHA_1.PS
SN_CALIB_PHA_2.PS
SN_CALIB_RAT_1.PS
SN_CALIB_RAT_2.PS
SN_CALIB_SNR_1.PS		 SN_CALIB_SNR_2.PS
UVPLT_UV.PS
UVPLT_UVD.PS
UVPLT_UVPA.PS
VPLOT.PS


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
J0811+01 looks like a resolving Gaussian, which does not match the PLS model.

The model for J0820-12 matches, in the sense that (for the non resolving sources) the positions match the PLS. Fluxes are less tho'.

Could look for component movement in this source (wrt PLS). UV coverage is oddly shaped.

Image
Ampl, Phase vs (u,v) Distance
PS (44 kb)
JPEG (40 kb)
 Ampl, Phase vs Time
PS (157 kb)
JPEG 1, 2		 (u,v) Coverage
PS (26 kb)
JPEG (28 kb)
Closure Phase vs Time
PS (114 kb)
JPEG 1		 Clean Image
PS (32 kb)
JPEG (46 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (44 kb)
JPEG (41 kb)
 Ampl, Phase vs Time
PS (157 kb)
JPEG 1, 2		 (u,v) Coverage
PS (26 kb)
JPEG (28 kb)
Closure Phase vs Time
PS (114 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)
0.0632577 0.970209 79.0569 0.351273 1.00000 0.00000 0.0250
0.228537 0.0595933 -117.424 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 Mon Sep 13 12:19:31 GMT 2004
by db_results.pl version 0.3.