VS06q Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Zhi-Qiang Shen
Date Prepared: 31-01-2000
 

Summary
 
Observation code : VS06q    AIPS Version : 15APR99   
Date of Observation : 1999/257    Difmap Version : 2.3c 
Source Name : J0407-12    vsop_difmap used : Yes 
Calibration Source(s) : 0420-014         
Ground telescopes : Kashima, Mop  Model Fitted to data : Yes 
Tracking Station(s) : NZ,TZ    Image made : No 
Correlator : Penticton         

 
Abstract
No space fringes can be detected. As a result, there was only one ground-baseline (Kashima-Mop) data for both survey source (J0407-12) and calibrator (0420-014). J0407-12 could be weak during the observations. However, the radio light curve data are not available.

A re-observation is recommended.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.0323963 0.00000 0.00000 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 douvcomp=1;dotable=1
 
 
 
 
 load the uv FITS data into AIPS (it is big ~0.62 GB). 
MSORT sort='TB'
 
 
 
 
 sort the data to 'TB' order 
INDXR cparm(3)=0.25
 
 
1 
 
 index uv data with 0.25 min CL entry interval 
TACOP
1 
 
2 
 
 protect original CL1 
ANTAB
 
 
 
 
 determine the Tsys and gain curve (see ANTAB.TXT file). Nominal values are used for both 2 GRTs and Halca. 
APCAL opcode=' '
 
 
 
1 
 generate an amplitude calibration solution table 
CLCAL opcode='CALI'
smotype='ampl '
refant=0
2 
1 
3 
 
 apply amplitude calibration solution 
TACOP
3 
 
4 
 
 save calibration table CL3 
CLCOR antenna=2,0;opcode='sbdl';clcorprm=-700,-700,0
4 
 
4 
 
 delay offset to Mop (antenna 2) 
FRING docalib=1;flagv=1
solint=4;refant=1;search=2,3,0
aparm=2,0,0,0,0,1,3,0,1,0
dparm=1,500,200,0;antwt=1,1,30
4 
 
 
10 
 Having been failed to find any fringes to Halca with large searching windows, do this only to identify the ground fringes with narrow windows. 
SNEDT dodelay=1
 
10 
 
11 
 Edit out some bad points 
CLCAL opcode='CALP';interpol='AMBG';smotype='VLBI'
refant=1
cals=sour='J0407-12'
(cals=sour='0420-014')
4 
11 
5 
 
 apply fringe fitting solutions (2 times) 
TASAV
 
 
 
 
 copy all extension tables to a dummy file 
SPLIT docalib=1;douvcomp=1;aparm=2,0
5 
 
 
 
 make calibrated single-source data files: J0407-12.SPLIT and 0420-014.SPLIT 
FITTP
 
 
 
 
 export each single-source file in FITS format to disk file for further analysis 

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

AIPS Output Files
PRTAN.LIS
LISTR.LIS
DTSUM_0.LIS
DTSUM_1.LIS
UVPLT_UV.PS
UVPLT_UVD.PS		 UVPLT_UVPA.PS
SN_APCAL_AMP_2.PS
SN_APCAL_AMP_1.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? No
Comments on Difmap processing
RGD: Out of interest I created the difmap model. A point source of 0.03 Jy which would not be expected to produce space fringes.

Modelfit
Ampl, Phase vs (u,v) Distance
PS (21 kb)
JPEG (40 kb)
 Ampl, Phase vs Time
PS (41 kb)
JPEG 1		 (u,v) Coverage
PS (13 kb)
JPEG (25 kb)
Closure Phase vs Time
PS (1 kb)
JPEG 1		 Image with model components
PS (44 kb)
JPEG (43 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)
0.0323963 0.00000 0.00000 0 0 0 0.0000
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Thu Sep 22 08:45:28 UTC 2005
by db_results.pl version 0.3.