VS08B Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 02-09-2005
 

Summary
 
Observation code : VS08B    AIPS Version : 31DEC03   
Date of Observation : 2002/15    Difmap Version : 2.3c 
Source Name : J0204-17    vsop_difmap used : Yes 
Calibration Source(s) : J0204+15, J0423-01         
Ground telescopes : MO, HO, KA, SH, CD, HH, KL  Model Fitted to data : Yes 
Tracking Station(s) : UZ    Image made : Yes 
Correlator : Penticton         

 
Abstract
Notes say "HALCA large pointing offset 12:45--13:30". VSOP only tracking in the first pass.

The DQA shows a bit off a mess. No fringes for Ho, few for Cd (10-11) (failed a source change?) Hh comes good after 12. Ho has fringes (with high delay & very high rates) to VSOP between 12:45 & 13:00 - when Halca is nominally off source! VSOP has a number of delay jumps 11:12. Kl has delays ~-430. VSOP jumps at ~500 12 (~0), 12:45 (~-4000), 13 (~500)
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.419130 0.0410106 -147.782 0.211768 1.00000 0.00000 0.4561
0.382214 1.01599 2.16011 1.53544 0.336107 -0.891033 0.0235
0.104455 2.47436 16.6270 0.831958 1.00000 -153.741 0.0074
(*) 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
 
 
 
2,3,4,5,6,7,8,9 
 exploration to find a good reference antenna. 
SNEDT/SNCOR
 
9 
 
10 
  
CLCAL refant=7;
2 
10 
3 
 
  
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
POSSM.PS
UVPLT_UV.PS
UVPLT_UVD.PS
UVPLT_UVPA.PS		 SN_APCAL_AMP_2.PS
SN_APCAL_AMP_1.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_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? Yes
Amplitude selfcal on non-global timescales used? No
Modelfit made and saved? Yes
Image Made and saved? Yes
Comments on Difmap processing
J0204+15 is significantly less than the PLS model (2.0 to 1.2). Hobart is no good. gscal to a point source give Cd 0.9, Mp 1,0.9 & Sh 1.2.

J0423-01 agrees well enough in flux, but gscal gives Cd 0.9, Mp 1,0.9, Ka 0.95, Kl 1.7,1.8 Sh 1.2

These factors were applied with scalant. The J0204-17 model matches the PLS and the UNSO images.

Image
Ampl, Phase vs (u,v) Distance
PS (88 kb)
JPEG (50 kb)
 Ampl, Phase vs Time
PS (435 kb)
JPEG 1, 2, 3, 4		 (u,v) Coverage
PS (46 kb)
JPEG (30 kb)
Closure Phase vs Time
PS (839 kb)
JPEG 1, 2, 3, 4, 5		 Clean Image
PS (33 kb)
JPEG (45 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (88 kb)
JPEG (50 kb)
 Ampl, Phase vs Time
PS (436 kb)
JPEG 1, 2, 3, 4		 (u,v) Coverage
PS (46 kb)
JPEG (30 kb)
Closure Phase vs Time
PS (839 kb)
JPEG 1, 2, 3, 4, 5		 Image with model components
PS (35 kb)
JPEG (40 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)
0.419130 0.0410106 -147.782 0.211768 1.00000 0.00000 0.4561
0.382214 1.01599 2.16011 1.53544 0.336107 -0.891033 0.0235
0.104455 2.47436 16.6270 0.831958 1.00000 -153.741 0.0074
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Fri Sep 2 17:17:08 UTC 2005
by db_results.pl version 0.3.