VS02I Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 03-07-2004
 

Summary
 
Observation code : VS02I    AIPS Version : 31DEC03   
Date of Observation : 1999/213    Difmap Version : 2.4a 
Source Name : J1427-4206    vsop_difmap used : No 
Calibration Source(s) : J1337-12         
Ground telescopes : MK OV KP PT LA FD SC  Model Fitted to data : Yes 
Tracking Station(s) : UZ GZ    Image made : Yes 
Correlator : Socorro         

 
Abstract
UZ no data

Model fit and clean image show a resolving source with a tail.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.741274 0.711349 35.3391 1.03599 1.00000 -144.825 0.0337
0.740196 0.162696 -168.239 0.00000 1.00000 0.00000 0.0000
0.363001 0.471308 -136.548 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
 
 
 
 
 Dataset 1 at the start broke things. Read it in last. 
INDXR cparm = 0, 0, 0.25;
 
 
1 
 
  
ANTAB infile='antab.txt'
 
 
 
 
  
APCAL
 
 
 
1 
  
CLCAL refant=1;
1 
1 
2 
 
 Amplitude calibration solutions applied. FD as ref 
FRING docal -1; dparm 2,400,400,0.5,0;aparm(7)=0.1;solint
   5,10,15
 
 
 
2,3,4 
 10 min looks best. 
CLCAL refant=1;sources 'J1427-42'';interpo
   'ambg'/'cube'
2 
3,2 
3,4,5 
 
 5 minute solution is better. CUBE is better than AMBG 
FRING docal -1; dparm 2,800,400,0.5,0;aparm(7)=0.1;solint
   5
 
 
 
5 
 Larger range searched. 10 min looks best. 
SNEDT
 
5 
 
6 
  
CLCAL refant=1;sources 'J1427-42'';interpo
   'ambg'/'cube'
2 
6 
6,7 
 
 This solution is better. Still nothing from UZ 
SPLIT aparm(1)=2 0;
7 
 
 
 
 Av within IF 
FITTP
 
 
 
 
 Data written out for analysis in Difmap 

AIPS Input Files
ANTAB.TXT Comments
- None -

AIPS Output Files
DTSUM_1.LIS
DTSUM_0.LIS
LISTR.LIS
PRTAN.LIS
VPLOT.PS
POSSM.PS
SN_CALIB_PHA_2.PS
SN_CALIB_PHA_1.PS
SN_CALIB_SNR_2.PS		 SN_CALIB_SNR_1.PS
SN_CALIB_RAT_2.PS
SN_CALIB_RAT_1.PS
SN_CALIB_DEL_2.PS
SN_CALIB_DEL_1.PS
SN_FRING01_SNR_2.PS
SN_FRING01_SNR_1.PS
SN_FRING01_RAT_2.PS
SN_FRING01_RAT_1.PS		 SN_FRING01_DEL_2.PS
SN_FRING01_DEL_1.PS
SN_APCAL_AMP_1.PS
SN_APCAL_AMP_2.PS
UVPLT_UVPA.PS
UVPLT_UVD.PS
UVPLT_UV.PS
IMAGE.FITS


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
Gscale improves, but does not alter the image - so I have resisted doing it.

The source appears to resovle much more than you'd predict from the VLBApls and LBA data.

Image
Ampl, Phase vs (u,v) Distance
PS (206 kb)
JPEG (53 kb)
 Ampl, Phase vs Time
PS (583 kb)
JPEG 1, 2, 3, 4, 5		 (u,v) Coverage
PS (104 kb)
JPEG (31 kb)
Closure Phase vs Time
PS (1187 kb)
JPEG 1, 2, 3, 4, 5, 6, 7		 Clean Image
PS (37 kb)
JPEG (46 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (108 kb)
JPEG (51 kb)
 Ampl, Phase vs Time
PS (520 kb)
JPEG 1, 2, 3, 4, 5		 (u,v) Coverage
PS (104 kb)
JPEG (31 kb)
Closure Phase vs Time
PS (1110 kb)
JPEG 1, 2, 3, 4, 5, 6, 7		 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)
0.741274 0.711349 35.3391 1.03599 1.00000 -144.825 0.0337
0.740196 0.162696 -168.239 0.00000 1.00000 0.00000 0.0000
0.363001 0.471308 -136.548 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 10:36:33 GMT 2004
by db_results.pl version 0.3.