VS04N Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 03-07-2004
 

Summary
 
Observation code : VS04N    AIPS Version : 31DEC03   
Date of Observation : 2000/183    Difmap Version : 2.4a 
Source Name : J1911-20    vsop_difmap used : No 
Calibration Source(s) : 1730-130         
Ground telescopes : HO HH CD  Model Fitted to data : Yes 
Tracking Station(s) : UZ RZ    Image made : No 
Correlator : Penticton         

 
Abstract
No fringes to Hobart for it is a limited data set, but a model fit can be performed.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
2.65937 0.0159439 108.707 0.427628 1.00000 0.00000 0.7097
0.115102 0.336570 -50.1629 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'
 
 
 
 
 The logged ceduna Tsys is 60, but usual is 45. 
APCAL
 
 
 
1 
  
CLCAL refant=2;
1 
1 
2 
 
 Amplitude calibration solutions applied. HH as ref (and CD) 
CLCOR opcode 'gain';antenna 0;clcorprm
   1.078,0
2 
 
2 
 
  
FRING docal -1;refa=3;dparm
   2,400,400,0.5,0;aparm(7)=0.1;
solint 5,10,15
 
 
 
2,3,4,5,6,7,8 
 Hobart is no good. Ceduna flagv no good. 
FRING docal -1;ante -3,0;refa=2;dparm
   2,150,50,0.5,0;aparm(7)=0.1;
solint 5/10/15;flagv -1
 
 
 
10,11,12 
 10 min best (weak to VSOP) 
SNEDT
 
12 
 
13 
  
CLCAL refant=1; source 'J1911-20''
2 
13 
3 
 
 big delay difference between sources 
FRING dparm 2,20,10,0.5,0;aparm(7)=0.1;solint
   10/5
3 
 
 
14,15 
  
CALIB gainu 3;solint 10/5
 
16,17 
 
 
 17 no good 
SNEDT
 
14 
 
18 
  
CLCAL
3 
18 
4 
 
  
SPLIT aparm(1)=2 0;
4 
 
 
 
 Av within IF 
FITTP
 
 
 
 
 Data written out for analysis in Difmap 

AIPS Input Files
ANTAB.TXT Comments
used nominal_tsys.pl

AIPS Output Files
PRTAN.LIS
LISTR.LIS
DTSUM_0.LIS
DTSUM_1.LIS
POSSM05_AP_1.PS
UVPLT_UV.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_FRING3_DEL_1.PS
SN_FRING3_DEL_2.PS
SN_FRING3_RAT_1.PS
SN_FRING3_RAT_2.PS		 SN_FRING3_SNR_1.PS
SN_FRING3_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? Yes
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
Insufficient data for closure, but a simple model can be fitted. Fluxes are in line with ATCA observations. The PLS model components match, but the flux is much lower.

Modelfit
Ampl, Phase vs (u,v) Distance
PS (33 kb)
JPEG (40 kb)
 Ampl, Phase vs Time
PS (90 kb)
JPEG 1, 2		 (u,v) Coverage
PS (19 kb)
JPEG (28 kb)
Closure Phase vs Time
PS (53 kb)
JPEG 1		 Image with model components
PS (32 kb)
JPEG (37 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)
2.65937 0.0159439 108.707 0.427628 1.00000 0.00000 0.7097
0.115102 0.336570 -50.1629 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 04:34:05 GMT 2004
by db_results.pl version 0.3.