VS05K Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Richard Dodson
Date Prepared: 18-08-2003
 

Summary
 
Observation code : VS05K    AIPS Version : 31DEC03   
Date of Observation : 2002/119    Difmap Version : 2.4a 
Source Name : J0831+04    vsop_difmap used : No 
Calibration Source(s) : J0811+01         
Ground telescopes : UD HO MP  Model Fitted to data : Yes 
Tracking Station(s) : UZ    Image made : Yes 
Correlator : Mitaka         

 
Abstract
Hobart is bad after 06:46. Usuda is grotty right through. Space fringes after a poor start.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.620065 0.0263343 -41.9161 0.506854 1.00000 51.6265 0.1178
0.277681 2.34699 64.6368 2.78042 1.00000 59.9987 0.0018
(*) 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. Mopra as ref 
CLCOR opcode 'gain';antenna 0;clcorprm
   1.063,0
3 
 
3 
 
  
FRING docal -1; dparm 2,0,0,0.5,0;aparm(7)=0.1;solint
   5,10,15
 
 
 
3,4,5 
  
FRING refa
   3/1;dparm(2)=800/400;dparm(3)=400/200/400;
solint 5/10;aparm(5)=0/1
 
 
 
6,7,8 
 Hobart as reference. Hobart is bad after 6:46. As they are all pretty crappy I'll get a rough sol for polynom 
SNEDT/CLCAL refant=1;interpo 'poly'
3 
8 
4 
9 
  
FRING dparm 2,100,50/100,0.5,0;aparm(7)=0.1;solint
   5
4 
 
 
10,11 
  
CLCAL refant=1;interpo 'ambg'
4 
11 
5 
 
  
SPLIT aparm(1)=2 0;
5 
 
 
 
 Av within IF 
FITTP
 
 
 
 
 Data written out for analysis in Difmap 

AIPS Input Files
ANTAB.TXT Comments
- None -

AIPS Output Files
DTSUM_0.LIS
DTSUM_1.LIS
LISTR.LIS
PRTAN.LIS
POSSM.PS
SN_ACCOR_AMP_1.PS
SN_ACCOR_AMP_2.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
UVPLT_UV.PS
UVPLT_UVD.PS
UVPLT_UVPA.PS
VPLOT.PS
IMAGE.FITS


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
Extended source (not along the beam for once). Single component fit works well. VLBApls model fits once, resolved compo removed & when the ratio is free-ed (upper limit previously). Zero baseline flux matches CA monitoring.

Could not get a good solution cleaning without limiting to the shorter baselines (those with flux).

EBF: 02-OCT-2005

Got rid of Usuda.

Reself-caled in AIPS, getting J0831EBF.FITS

Image and model show resolved core and fainter component to north-east, similar to VLBApls.

The core is definitely resolved with 0.50 pm 0.15 size.

Image
Ampl, Phase vs (u,v) Distance
PS (33 kb)
JPEG (42 kb)
 Ampl, Phase vs Time
PS (123 kb)
JPEG 1, 2		 (u,v) Coverage
PS (20 kb)
JPEG (30 kb)
Closure Phase vs Time
PS (91 kb)
JPEG 1		 Clean Image
PS (45 kb)
JPEG (53 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (33 kb)
JPEG (42 kb)
 Ampl, Phase vs Time
PS (120 kb)
JPEG 1, 2		 (u,v) Coverage
PS (20 kb)
JPEG (30 kb)
Closure Phase vs Time
PS (91 kb)
JPEG 1		 Image with model components
PS (44 kb)
JPEG (51 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)
0.620065 0.0263343 -41.9161 0.506854 1.00000 51.6265 0.1178
0.277681 2.34699 64.6368 2.78042 1.00000 59.9987 0.0018
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Sat Oct 8 04:32:49 UTC 2005
by db_results.pl version 0.3.