VS09N Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 03-10-2005
 

Summary
 
Observation code : VS09N    AIPS Version : 31DEC03   
Date of Observation : 2003/284    Difmap Version : 2.3c 
Source Name : J1924-29    vsop_difmap used : Yes 
Calibration Source(s) : J2009-48 J2258-27         
Ground telescopes : Ho Mo Hh  Model Fitted to data : Yes 
Tracking Station(s) : UZ    Image made : Yes 
Correlator : Mitaka         

 
Abstract
No space fringe. Resolves to < 0.1 Jy on GRTs.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.532929 0.135032 166.684 1.11274 0.463482 -67.7445 0.0453
0.0298822 5.27604 88.3926 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. Mo as ref 
CLCOR opcode 'gain';antenna 0;clcorprm
   1.063,0
3 
 
3 
 
  
FRING docal -1; dparm 2,400/0,400/0,0.5,0;aparm(7)=0.1;solint
   5,10,15
 
 
 
3,4,5,6 
 Full range searched 
SNEDT/SNCOR/CLCAL opc 'zdel'/'zrat'/'zphs'
3 
6 
4 
7 
 zero Halca sols 
KRING cparm 1/2,0,0,-1,0;solint
   5;cparm(5)=0/3
4 
 
 
8,9 
 Still nothing. Don't understand cparm(5) 
SPLIT aparm(1)=2 0;
5 
 
 
 
 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_ACCOR_AMP_1.PS		 SN_ACCOR_AMP_2.PS
SN_APCAL_AMP_1.PS
SN_APCAL_AMP_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_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? No
Amplitude selfcal on non-global timescales used? No
Modelfit made and saved? Yes
Image Made and saved? Yes
Comments on Difmap processing
For J1924-29 Hobart is low by about an factor of 12 (Mo-Ho-Hh)! For J2258-27 it looks okay (single baseline)

J2009-48: Looks sensible. A Circular guassian falls to < 0.1 Jy at ~ 200 Ml. A `hard to justify' second component was added. It should be removed I think, reduces the noise - but at ~ 6% is too weak to be trusted with only 3 GRTs.

Image
Ampl, Phase vs (u,v) Distance
PS (31 kb)
JPEG (34 kb)
 Ampl, Phase vs Time
PS (121 kb)
JPEG 1, 2		 (u,v) Coverage
PS (16 kb)
JPEG (26 kb)
Closure Phase vs Time
PS (86 kb)
JPEG 1		 Clean Image
PS (35 kb)
JPEG (47 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (30 kb)
JPEG (33 kb)
 Ampl, Phase vs Time
PS (119 kb)
JPEG 1, 2		 (u,v) Coverage
PS (16 kb)
JPEG (25 kb)
Closure Phase vs Time
PS (86 kb)
JPEG 1		 Image with model components
PS (35 kb)
JPEG (41 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)
0.532929 0.135032 166.684 1.11274 0.463482 -67.7445 0.0453
0.0298822 5.27604 88.3926 0 0 0 0.0000
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Mon Oct 3 16:59:46 UTC 2005
by db_results.pl version 0.3.