VS03I1 Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 06-08-2003
 

Summary
 
Observation code : VS03I1    AIPS Version : 31DEC03   
Date of Observation : 2002/209    Difmap Version : 2.4a 
Source Name : J0204+15    vsop_difmap used : No 
Calibration Source(s) : J0423-01         
Ground telescopes : NT HH KL  Model Fitted to data : Yes 
Tracking Station(s) : UZ    Image made : Yes 
Correlator : Mitaka         

 
Abstract
No NOTO in the data? Log file says Antenna Communications ERROR (and nothing else).

Strong space fringes, but poor orbit model.

Extended structure along the correct axis (which is also the clean beam axis), the broad (>2mas) component is lost.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
2.35051 0.00553539 164.176 0.731621 0.350339 -23.3473 0.6117
0.107832 0.702045 -1.28335 0 0 0 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 
  
ACCOR solint 5
 
 
 
2 
  
CLCAL refant=1;
1 
1,2 
2,3 
 
 Amplitude calibration solutions applied. Hart as ref 
CLCOR opcode 'gain';antenna 0;clcorprm
   1.063,0
3 
 
3 
 
  
FRING docal -1; dparm 2,0,0,0.5,0;aparm(7)=0.1;solint
   5,10,15
 
 
 
3,4,5 
 Poor orbit, best solution #3 (5 min) 
CLCAL refant=1;
3 
3 
4 
 
  
SPLIT aparm(1)=2 0;
4 
 
 
 
 Av within IF 
FITTP
 
 
 
 
 Data written out for analysis in Difmap 

AIPS Input Files
ANTAB.TXT Comments
- None -

AIPS Output Files
DTSUM_0.LIS
DTSUM_1.LIS
LISTR.LIS
PRTAN.LIS
POSSM.PS
SN_ACCOR_AMP_1.PS
SN_ACCOR_AMP_2.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
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
The VLBApls model fits if the flux from the main component is halved. This is believable compared to the 2cm & the UMRO fluxes.

3 point sources clustered around the core gives the best fit, but I have settled on a point and a Gaussian.

Image
Ampl, Phase vs (u,v) Distance
PS (38 kb)
JPEG (45 kb)
 Ampl, Phase vs Time
PS (96 kb)
JPEG 1, 2		 (u,v) Coverage
PS (20 kb)
JPEG (28 kb)
Closure Phase vs Time
PS (56 kb)
JPEG 1		 Clean Image
PS (32 kb)
JPEG (44 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (26 kb)
JPEG (43 kb)
 Ampl, Phase vs Time
PS (88 kb)
JPEG 1, 2		 (u,v) Coverage
PS (20 kb)
JPEG (28 kb)
Closure Phase vs Time
PS (54 kb)
JPEG 1		 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)
2.35051 0.00553539 164.176 0.731621 0.350339 -23.3473 0.6117
0.107832 0.702045 -1.28335 0 0 0 0.0000
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Fri Aug 6 10:44:05 GMT 2004
by db_results.pl version 0.3.