VS02M Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 16-03-2005
 

Summary
 
Observation code : VS02M    AIPS Version : 31DEC02   
Date of Observation : 1997/234    Difmap Version : 2.4a 
Source Name : 1928+738    vsop_difmap used : No 
Calibration Source(s) : 0212+735         
Ground telescopes : EB PT MK (BR KP FD HN KP LA MK NL OV SC)  Model Fitted to data : Yes 
Tracking Station(s) : TZ (RZ)    Image made : Yes 
Correlator : Socorro         

 
Abstract
PR source, experiment V034

Reasonable image and model. Core is <0.15 mas
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.161199 0.144782 -137.305 0 0 0 0.0000
0.825028 0.126975 -41.2929 0.386230 0.463420 -14.9353 0.5824
0.575286 0.861346 -27.9552 1.24405 0.353854 10.1130 0.0513
0.255190 1.25969 172.500 0.484136 0.696140 34.9546 0.0763
0.164036 1.80338 -174.502 0.452911 1.00000 20.5999 0.0390
(*) 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 
TACOP/CLCOR opcode 'sbdl';antenna 2 0;clcorprm
   200
antenna 13 0;clcorprm -50;antenna
    12 0;timer 0 0 0 0 0 5 0
   0 clcorprm 200;
antenna 12 0;timer 0 5 0
   0 0 12 0 0 clcorprm -100;
2 
 
3 
 
 Split correction for #12 
FRING dparm 2,200,200,0.5,0;aparm(7)=0.1;solint
   5
3 
 
 
6 
  
SNEDT
 
6 
 
7 
 Full range searched 
CLCAL refant=1;opty 'ambg'
3 
7 
4 
 
  
ACCOR solint 5
 
 
 
8 
  
CLCAL refant=1;
4 
8 
5 
 
  
SPLIT aparm(1)=2 0;
5 
 
 
 
 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
UVPLT_UV.PS
UVPLT_UVD.PS
UVPLT_UVPA.PS		 SN_ACCOR_AMP_1.PS
SN_ACCOR_AMP_2.PS
SN_APCAL_AMP_2.PS
SN_APCAL_AMP_1.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
IMAGE.FITS


Difmap Data Reduction Notes
Phase selfcal applied? Yes
Global amplitude selfcal (gscal) applied? Yes
Amplitude selfcal on non-global timescales used? No
Modelfit made and saved? Yes
Image Made and saved? Yes
Comments on Difmap processing
Complicated image (see Lister 2001ApJ...554..948L) which is suitable for testing the effects of limited coverage on.

Does an acceptable job on reproducing (with clean) the extended source, but none of the resolving jet components could be imaged, because of the poor uv coverage. The model is poor, but again follows the axis. Lister with the full data was not able to make a great model.

Reasonable image and model. Core is <0.15 mas

Image
Ampl, Phase vs (u,v) Distance
PS (68 kb)
JPEG (50 kb)
 Ampl, Phase vs Time
PS (1047 kb)
JPEG 1, 2, 3, 4, 5, 6, 7		 (u,v) Coverage
PS (36 kb)
JPEG (34 kb)
Closure Phase vs Time
PS (4551 kb)
JPEG 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27		 Clean Image
PS (36 kb)
JPEG (46 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (68 kb)
JPEG (51 kb)
 Ampl, Phase vs Time
PS (1044 kb)
JPEG 1, 2, 3, 4, 5, 6, 7		 (u,v) Coverage
PS (36 kb)
JPEG (34 kb)
Closure Phase vs Time
PS (4544 kb)
JPEG 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27		 Image with model components
PS (37 kb)
JPEG (41 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)
0.161199 0.144782 -137.305 0 0 0 0.0000
0.825028 0.126975 -41.2929 0.386230 0.463420 -14.9353 0.5824
0.575286 0.861346 -27.9552 1.24405 0.353854 10.1130 0.0513
0.255190 1.25969 172.500 0.484136 0.696140 34.9546 0.0763
0.164036 1.80338 -174.502 0.452911 1.00000 20.5999 0.0390
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Tue Oct 11 13:04:30 UTC 2005
by db_results.pl version 0.3.