VS03y Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Shinji HORIUCHI
Date Prepared: 05-12-2001
 

Summary
 
Observation code : VS03y    AIPS Version : 12DEC00   
Date of Observation : 1999/94    Difmap Version : 2.3c 
Source Name : J0854+2006    vsop_difmap used : Yes 
Calibration Source(s) : 0823+033         
Ground telescopes : EB, BR, FD, SC  Model Fitted to data : Yes 
Tracking Station(s) : GZ    Image made : Yes 
Correlator : Socorro         

 
Abstract
The target source is famous OJ287. This is one of extractions from Gabutzda related BL-Lac polarization observations. There is no Tsys information for Bonn 100m antenna EB available at aspen. EB was flagged by FG table created by FITLD. Since EB has provided good fring solution with FLAGVER=-1, I decided to use this antenna. The EB amplitude correction was applied with a constant taken from the value in VS02l. The image consist of compact two major components as expected.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
1.59906 0.111611 -31.4493 0.482577 0.391847 70.2789 0.8551
0.215738 0.965466 -90.9414 0.366000 1.00000 -79.2157 0.0786
0.0443371 0.716124 28.0443 0.00509462 1.00000 -81.8699 83.3611
(*) 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
 
 
 
 
  
INDXR
 
 
 
 
  
ACCOR
 
 
 
1 
  
ANTAB
 
 
 
 
 TY1, GC1 are generated. 
APCAL
 
 
 
6 
  
CLCAL
1 
1 
2 
 
 SMOTY 'AMPL' 
CLCAL
2 
6 
5 
 
 SMOTY 'AMPL' 
FRING Solint=6, APARM(7)=1, DPARM=1,2000,
    200, 0, REFANT=2 (EB),
   FLAGVER=-1
0 
 
 
13 
  
TACOP
5 
 
6 
 
 SMOTY 'AMPL' 
CLCOR ANTENN=2 (EB), OPCODE
    'SBDL', CLCORPRM -600,
   -600, -600, -600
6 
 
6 
 
 add offset for EB 
FRING DOCAL=2, Solint=6, APARM(7)=3,
    DPARM=0,150, 120, 0, REFANT=2
   (EB), FLAGVER=-1
6 
 
 
14 
  
CLCAL
6 
14 
7 
 
 SMOTY 'VLBI' 
SPLIT
6 
 
 
 
  
FITTP
 
 
 
 
  

AIPS Input Files
Comments
- None -

Additional Files
NameDescription
VS03Y.ANTABANTAB file

AIPS Output Files
PRTAN.LIS
LISTR.LIS
DTSUM_0.LIS
DTSUM_1.LIS
UVPLT_UV.PS
UVPLT_UVD.PS
UVPLT_UVPA.PS
SN_ACCOR_AMP_1.PS
SN_ACCOR_AMP_2.PS
SN_APCAL_AMP_2.PS		 SN_APCAL_AMP_1.PS
SN_FRING1_DEL_1.PS
SN_FRING1_DEL_2.PS
SN_FRING1_RAT_1.PS
SN_FRING1_RAT_2.PS
SN_FRING1_SNR_1.PS
SN_FRING1_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
POSSM_AP1_01.PS
POSSM_AP1_02.PS


Difmap Data Reduction Notes
Phase selfcal applied? Yes
Global amplitude selfcal (gscal) applied? Yes
Amplitude selfcal on non-global timescales used? Yes
Modelfit made and saved? Yes
Image Made and saved? Yes
Comments on Difmap processing
Though I applied only a constant for EB gain-tsys, gscal correction was rather modeest, which is

! Correcting IF 1. ! A total of 279 telescope corrections were flagged in sub-array 1. ! Amplitude normalization factor in sub-array 1: 1.01196 ! Telescope amplitude corrections in sub-array 1: ! BR 0.92 EB 0.95 FD 1.08 GZ 1.05 ! SC 0.94 ! ! ! Correcting IF 2. ! A total of 279 telescope corrections were flagged in sub-array 1. ! Amplitude normalization factor in sub-array 1: 1.02435 ! Telescope amplitude corrections in sub-array 1: ! BR 0.92 EB 0.92 FD 1.04 GZ 1.03 ! SC 0.96 !

Amplitude-phase self-cal was performed as short as 30 minutes solint.

Image
Ampl, Phase vs (u,v) Distance
PS (96 kb)
JPEG (50 kb)
 Ampl, Phase vs Time
PS (242 kb)
JPEG 1, 2, 3		 (u,v) Coverage
PS (50 kb)
JPEG (32 kb)
Closure Phase vs Time
PS (256 kb)
JPEG 1, 2		 Clean Image
PS (39 kb)
JPEG (46 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (96 kb)
JPEG (51 kb)
 Ampl, Phase vs Time
PS (242 kb)
JPEG 1, 2, 3		 (u,v) Coverage
PS (50 kb)
JPEG (32 kb)
Closure Phase vs Time
PS (256 kb)
JPEG 1, 2		 Image with model components
PS (39 kb)
JPEG (42 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)
1.59906 0.111611 -31.4493 0.482577 0.391847 70.2789 0.8551
0.215738 0.965466 -90.9414 0.366000 1.00000 -79.2157 0.0786
0.0443371 0.716124 28.0443 0.00509462 1.00000 -81.8699 83.3611
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Wed Dec 5 20:22:35 GMT 2001
by db_results.pl version 0.3.