VS08T1 Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 04-09-2004
 

Summary
 
Observation code : VS08T1    AIPS Version : 31DEC03   
Date of Observation : 2002/84    Difmap Version : 2.3c 
Source Name : J1647-6437    vsop_difmap used : Yes 
Calibration Source(s) : J0450-81,J1617-77         
Ground telescopes : HH CD HO  Model Fitted to data : Yes 
Tracking Station(s) : UZ    Image made : Yes 
Correlator : Penticton         

 
Abstract
No VSOP fringes, but consistent with the GRT data and experiment VS08T. Fit with two overlapping components.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.130139 0.487714 -115.941 0.800325 1.00000 45.2938 0.0099
0.265890 0.171121 65.0777 0.734050 1.00000 28.8582 0.0241
(*) 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. XX as ref 
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/SNCOR/CLCAL refant=1;interp 'ambg'/'cube'
2 
3 
3,4 
5 
  
CALIB solint 5;solm 'p'
3 
 
 
6 
  
FRING dparm 2,10,10,0.5,0;aparm(5)=1;solint
   5
3 
 
 
7 
  
CLCAL refant=1;
3 
6 
5 
 
  
SNCOR/CLCAL ante 0;opc 'zdel';refant=1;
3 
7 
6 
 
  
SPLIT aparm(1)=2 0;
6 
 
 
 
 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
DTSUM_0.LIS
DTSUM_1.LIS
LISTR.LIS
PRTAN.LIS
POSSM.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
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
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
Selfcalled on a 2 minute time scale as the phase solutions were poor. Fixed the VSOP phases to prevent point source generation.

Elliptical Gaussian required to fit the lack of VSOP fringes and the CD-HH data. If VSOP was a failure a circular Gaussian (gaussian.mod) is the more conservative fit.

EBF: 10-OCT-2005 No VSOP detection, but probably okay Core is about 1 mas. Fit with two overlapping components to fit the asymmetries.

Image
Ampl, Phase vs (u,v) Distance
PS (58 kb)
JPEG (51 kb)
 Ampl, Phase vs Time
PS (154 kb)
JPEG 1, 2		 (u,v) Coverage
PS (31 kb)
JPEG (31 kb)
Closure Phase vs Time
PS (111 kb)
JPEG 1		 Clean Image
PS (29 kb)
JPEG (64 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (58 kb)
JPEG (51 kb)
 Ampl, Phase vs Time
PS (154 kb)
JPEG 1, 2		 (u,v) Coverage
PS (31 kb)
JPEG (31 kb)
Closure Phase vs Time
PS (111 kb)
JPEG 1		 Image with model components
PS (30 kb)
JPEG (36 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)
0.130139 0.487714 -115.941 0.800325 1.00000 45.2938 0.0099
0.265890 0.171121 65.0777 0.734050 1.00000 28.8582 0.0241
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Tue Oct 11 06:29:51 UTC 2005
by db_results.pl version 0.3.