VS03x Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Ed Fomalont
Date Prepared: 02-10-1999
 

Summary
 
Observation code : VS03x    AIPS Version : 15OCT99   
Date of Observation : 1999/200    Difmap Version : 2.3c 
Source Name : J1357+19    vsop_difmap used : Yes 
Calibration Source(s) : 1413+135         
Ground telescopes : AR, NT  Model Fitted to data : Yes 
Tracking Station(s) : NZ    Image made : Yes 
Correlator : Penticton         

 
Abstract
1. AR available for 2 hrs. NT only for 1.5 hrs.

2. Strong fringes even for space baselines. Used 5-min solutions in FRING and 2-min solutions for phase CALIB.

3. Total flux=1.2 Jy but complicated structure found by VLBA.

4. Obtained gain factor for ground telescopes using consistency at 150 Mlambda and betweeen space baselines. Assumed 1413+135 correlated flux is 0.6 Jy at this resolution.

5. Gainfactor of AR = 6; NT = 20 and assumed VSOP = 120.

6. Selfcaled in AIPS, giving J1357_AIPS.FITS

7. Modelfit suggests source is aligned in pa 160, which agrees with VLBApls. Needed three components to fit, two doesn't seem to do it. But could not selfcal. Core, whereever it is, seems resolved.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.671170 0.0108773 -140.586 0.892468 0.777131 -4.48123 0.0529
0.122981 2.38549 -32.0276 0.965057 0.419043 -51.7268 0.0154
0.149457 2.47069 147.714 1.01379 1.00000 18.2055 0.0071
(*) 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
FRING solint = 5
dparm = 2, 4000, 200, 0.5
1 
 
 
1 
 Fringe fit on all data. Good SNR 
CLCAL interp 'cube'
1 
1 
2 
 
  
CALIB solint = 2
2 
 
 
2 
 Calib on all data. Good SNR 
CLCAL interp 'cube'
2 
2 
3 
 
  
CLCOR ante 1,0
clcor = 6, 0
ante 2,0
clcor = 30, 0
ante 3,0
clcor = 120, 0
3 
3 
3 
 
  

AIPS Input Files
Comments
Very little flaging after Penticton apriori flagging needed.

AIPS Output Files
PRTAN.LIS
LISTR.LIS
UVPLT_UV.PS
UVPLT_UVD.PS		 UVPLT_UVPA.PS
SN_CALIB_PHS_1.PS
SN_FRING01_DEL_1.PS
SN_FRING01_RAT_1.PS		 SN_FRING01_SNR_1.PS
SN_FRING01_PHS_1.PS
IMAGE.FITS


Difmap Data Reduction Notes
Phase selfcal applied? No
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

Image
Ampl, Phase vs (u,v) Distance
PS (21 kb)
JPEG (36 kb)
 Ampl, Phase vs Time
PS (64 kb)
JPEG 1, 2		 (u,v) Coverage
PS (14 kb)
JPEG (27 kb)
Closure Phase vs Time
PS (42 kb)
JPEG 1		 Clean Image
PS (37 kb)
JPEG (48 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (21 kb)
JPEG (36 kb)
 Ampl, Phase vs Time
PS (65 kb)
JPEG 1, 2		 (u,v) Coverage
PS (14 kb)
JPEG (27 kb)
Closure Phase vs Time
PS (42 kb)
JPEG 1		 Image with model components
PS (37 kb)
JPEG (44 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)
0.671170 0.0108773 -140.586 0.892468 0.777131 -4.48123 0.0529
0.122981 2.38549 -32.0276 0.965057 0.419043 -51.7268 0.0154
0.149457 2.47069 147.714 1.01379 1.00000 18.2055 0.0071
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Tue Oct 11 05:58:04 UTC 2005
by db_results.pl version 0.3.