VS01d Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Matt Lister
Date Prepared: 14-04-1999
 

Summary
 
Observation code : VS01d    AIPS Version : 15APR99   
Date of Observation : 1997/346    Difmap Version : 2.3c 
Source Name : 3C454.3    vsop_difmap used : Yes 
Calibration Source(s) :          
Ground telescopes : SC, PT, NL, OV  Model Fitted to data : Yes 
Tracking Station(s) : NZ    Image made : Yes 
Correlator : Socorro         

 
Abstract
Raw data contained 4 polarizations, with only LL useable. Had to flag RR and CROS hands, then UVCOP to new file, discarding flagged data. ACCOR will not work properly otherwise. Flagged OV entirely, as data were bad, and antenna not needed. Flagged timerang 18h to 18h45m06 since only anten 8 present.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
6.02880 0.0278365 102.479 0.510130 0.710816 -80.0152 1.5905
(*) 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 douvcomp = 1
clint = 0.25
digicor = 1
delcorr = 1
 
 
 
 
  
INDXR cparm = 0, 0, 0.25
 
 
1 
 
  
OBTAB aparm = 1,0
 
 
 
 
  
UVFLG infil = 'uvflg.txt'
 
 
 
 
 Additional flagging done - see abstract 
ACCOR solint = 5
1 
 
2 
1 
  
ANTAB
 
 
 
 
 VLBA gain file and TSYS data from aspen used. 
APCAL
2 
 
3 
2 
  
CLCOR opcode 'cloc'
3 
 
3 
 
 Initial fringe found delay of -210 ns for NZ and +62.5 ns for PT. 
FRING docalib = 1
gainuse = 3
dofit = 0
solint = 5
dparm = 3,200,100,0
cparm = 2,0,0,0,0,1,4,0,1,0
3 
 
4 
3 
  
SPLIT aparm 2,0,1; gainuse 4
 
 
 
 
  
FITTP
 
 
 
 
 Data written out for analysis in Difmap 

AIPS Input Files
UVFLG.TXT
ANTAB.TXT		 Comments
- None -

Additional Files
NameDescription
radplot.psradplot from DIFMAP
tplot.pstplot from DIFMAP

AIPS Output Files
LISTR.LIS
DTSUM_1.LIS
PRTAN.LIS
SN_FRING1_DEL_1.PS
SN_APCAL_AMP_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
VPLOT_AP_1.PS
VPLOT_AP_2.PS		 SN_ACCOR_AMP_1.PS
SN_ACCOR_AMP_2.PS
SN_APCAL_AMP_2.PS
UVPLT_UV.PS
POSSM01_AP_1.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
A simple one-component model was fit to the self-calibrated data.

Image
Ampl, Phase vs (u,v) Distance
PS (32 kb)
JPEG (35 kb)
 Ampl, Phase vs Time
PS (102 kb)
JPEG 1, 2		 (u,v) Coverage
PS (18 kb)
JPEG (26 kb)
Closure Phase vs Time
PS (78 kb)
JPEG 1		 Clean Image
PS (70 kb)
JPEG (48 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (32 kb)
JPEG (35 kb)
 Ampl, Phase vs Time
PS (102 kb)
JPEG 1, 2		 (u,v) Coverage
PS (18 kb)
JPEG (26 kb)
Closure Phase vs Time
PS (78 kb)
JPEG 1		 Image with model components
PS (79 kb)
JPEG (49 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)
6.02880 0.0278365 102.479 0.510130 0.710816 -80.0152 1.5905
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Thu Nov 30 01:09:44 GMT 2000
by db_results.pl version 0.3.