VS09L1 Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 13-09-2004
 

Summary
 
Observation code : VS09L1    AIPS Version : 31DEC03   
Date of Observation : 2002/55    Difmap Version : 2.4a 
Source Name : J0513-21    vsop_difmap used : No 
Calibration Source(s) : J0609-15         
Ground telescopes : MP HO UD SH HH  Model Fitted to data : Yes 
Tracking Station(s) : UZ    Image made : Yes 
Correlator : Penticton         

 
Abstract
Hobart again has problems with phase stability. Should have VSOP fringes (GRT/Space overlap. Flux ~ 0.2 Jy). HALCA failure.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.235664 0.372548 141.894 0.467296 1.00000 167.173 0.0527
0.184114 0.373593 -36.8410 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. 
FRING docal -1; dparm 2,400,400,0.5,0;aparm(7)=0.1;solint
   5,10,15
 
 
 
2,3,4 
 Full range searched 
SNEDT/SNSMO/SNCOR/CLCAL ante 6;smoty 'vlbi';bparm
   0 0 0.5 0.5;
opc zdel/zrat/zphs;interp
   'ambg'
2 
3 
3 
5 
  
FRING dparm 2,40,40,0.5,0;aparm(7)=0.1;solint
   5;
3 
 
 
6 
  
CLCAL refant=1;
3 
6 
4 
 
  
KRING/FRING cparm 0.5 dparm 2,40,40,0.5,0;aparm(7)=0.1;solint
   5;
3 
 
 
7,8 
 No space frniges 
SPLIT aparm(1)=2 0;
3 
 
 
 
 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
LISTR.LIS
DTSUM_0.LIS
DTSUM_1.LIS
VPLOT.PS
UVPLT_UV.PS
UVPLT_UVD.PS
UVPLT_UVPA.PS
POSSM.PS
SN_APCAL_AMP_1.PS
SN_APCAL_AMP_2.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? 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
GRTs and space baselines overlap. The flux would be 0.2 Jy so fringes should have been found. Therefore the experiment is a failure.

Selfcaled on 2 minutes as the phase solutions were not very good.

Hobart is very unstable and was deleted.

The GRTs seem to fit PLS pretty well with ~ half the flux (model pls_amp_free).

Image
Ampl, Phase vs (u,v) Distance
PS (43 kb)
JPEG (36 kb)
 Ampl, Phase vs Time
PS (274 kb)
JPEG 1, 2, 3		 (u,v) Coverage
PS (23 kb)
JPEG (26 kb)
Closure Phase vs Time
PS (405 kb)
JPEG 1, 2		 Clean Image
PS (32 kb)
JPEG (44 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (27 kb)
JPEG (36 kb)
 Ampl, Phase vs Time
PS (248 kb)
JPEG 1, 2, 3		 (u,v) Coverage
PS (23 kb)
JPEG (26 kb)
Closure Phase vs Time
PS (381 kb)
JPEG 1, 2		 Image with model components
PS (825 bytes)
JPEG (0 bytes)

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)
0.235664 0.372548 141.894 0.467296 1.00000 167.173 0.0527
0.184114 0.373593 -36.8410 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 Tue Sep 14 07:07:41 GMT 2004
by db_results.pl version 0.3.