VS04P Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 07-09-2004
 

Summary
 
Observation code : VS04P    AIPS Version : 31DEC03   
Date of Observation : 1998/113    Difmap Version : 2.4a 
Source Name : J1557-00    vsop_difmap used : No 
Calibration Source(s) : 1334-127         
Ground telescopes : UD HH SH  Model Fitted to data : Yes 
Tracking Station(s) : UZ    Image made : No 
Correlator : Penticton         

 
Abstract
Dig for victory. Finally extracted some VOSP-Usuda fringes. FRING/KRING is not nearly as good as DQA1. THIS IS IMPORTANT! Shanghi has a very strange gain oscillation. Lots of data flagged for this.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.449494 0.000790793 -124.098 0.366260 1.00000 0.00000 0.1635
(*) 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 
 
 Amplitude calibration solutions applied. HH as ref 
FRING docal -1; dparm 2,400,400,0.5,0;aparm(7)=0.1;solint
   5,10,15
 
 
 
2,3,4 
 Change ref to 3 (SH). No fringes to VSOP 
FRING refant=3;dparm 2,400/0,400/0,0.5,0;solint
   10
 
 
 
6 
 Huge delays to UD/HH 
TACOP/CLCOR ante 4 0;clcorpa 930,930,0;ante
   1 0;clcorpa -1960,-1960,0
2 
 
3 
 
  
FRING refant=3;dparm 2,0/100,0/100,0.5,0;solint
   10
3 
 
 
7,8 
 Try and find the fringes to VSOP 
SNCOR ante 2 0;opc
   'zrat'/'zphs'/'zdel'
8 
 
8 
 
  
CLCAL refant=1;interpo 'ambg'
3 
8 
4 
 
  
KRING refant=3;dofit 2 0;cparm
   0.5,200/0,200/0,-1,0;solint
4 
 
 
9,10,11 
 Try and find the fringes to VSOP. Nothing 
KRING ante=refant=4;timer 0 18
   0 0 0 20 0
4 
 
 
12,13 
 Try and find the DQA result 
SNEDT/CLCAL interpo 'ambg'/'cube'/'poly';intp
   2
3 
12 
5,6,7 
14 
 #6 is best 
SPLIT aparm(1)=2 0;
4 
 
 
 
 Av within IF 
FITTP
 
 
 
 
 Data written out for analysis in Difmap 

AIPS Input Files
ANTAB.TXT Comments
used nominal_tsys.pl

Additional Files
NameDescription
Shanghi_Gain_Oscillation.psShanghai gain variation, with VLBApls model

AIPS Output Files
DTSUM_0.LIS
DTSUM_1.LIS
LISTR.LIS
PRTAN.LIS
VPLOT.PS
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		 SN_FRING2_DEL_1.PS
SN_FRING2_DEL_2.PS
SN_FRING2_RAT_1.PS
SN_FRING2_RAT_2.PS
SN_FRING2_SNR_1.PS
SN_FRING2_SNR_2.PS
UVPLT_UVPA.PS
UVPLT_UV.PS
UVPLT_UVD.PS


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? No
Comments on Difmap processing

Modelfit
Ampl, Phase vs (u,v) Distance
PS (24 kb)
JPEG (38 kb)
 Ampl, Phase vs Time
PS (141 kb)
JPEG 1, 2		 (u,v) Coverage
PS (13 kb)
JPEG (25 kb)
Closure Phase vs Time
PS (121 kb)
JPEG 1		 Image with model components
PS (29 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)
0.449494 0.000790793 -124.098 0.366260 1.00000 0.00000 0.1635
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Fri Aug 6 10:58:23 GMT 2004
by db_results.pl version 0.3.