VS03c Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: Zhi-Qiang Shen
Date Prepared: 28-10-1999
 

Summary
 
Observation code : VS03c    AIPS Version : 15OCT98   
Date of Observation : 1997/329    Difmap Version : 2.3c 
Source Name : J2123+05    vsop_difmap used : Yes 
Calibration Source(s) :          
Ground telescopes : Mopra, ATCA, Usuda  Model Fitted to data : No 
Tracking Station(s) : TZ    Image made : Yes 
Correlator : Mitaka         

 
Abstract
Fringes were clearly detected on both ground-ground and ground-space baselines.

Image was made after both the phase self-cal (for whole 6-hr track) and a global amplitude self-cal (for 2-hr data when 4 antennas including Halca were available) were applied.

Modelfitting was not tried.


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 
MSORT sort='TB'
 
 
 
 
 sort the data to 'TB' order 
INDXR cparm(3)=1
 
 
1 
 
 index uv data with 1 min CL entry interval 
TACOP
1 
 
2 
 
 protect CL1 
ACCOR solint=0
 
 
 
1 
 correct amplitudes in cross correlation spectrum 
SNSMO smotype='ampl';bparm=0.05,0;refant=0
 
1 
 
2 
 smooth the amplitude correction SN1 
CLCAL opcode='CALI'
interpol=' '
2 
2 
3 
 
 apply smoothed ACCOR solution SN2 
ANTAB
 
 
 
 
 determine the Tsys and gain curve (45K for Mopra, 105K for Usuda and 45K for ATCA) 
APCAL opcode=' '
 
 
 
3 
 generate an amplitude calibration solution table 
CLCAL opcode='CALI';interpol=';refant=3
3 
3 
4 
 
 apply amplitude calibration solution 
FRING docalib=1;refant=3;solint=4
aparm=2,0,0,0,0,1,5,0
dparm=1, 0
4 
 
 
4 
 run FRING with an SNR cutoff=5 
CLCAL opcode='CALI';smotype='VLBI'
refant=3
4 
4 
5 
 
 apply FRING solutions 
TASAV
 
 
 
 
 copy all extension tables to a dummy file 
SPLIT docalib=1;douvcomp=1
aparm=2,0,0,1,0
5 
 
 
 
 make calibrated single-source data J2123+05.SPLIT 
FITTP
 
 
 
 
 export each single-source file in FITS format to disk file for further imaging analysis 

AIPS Input Files
ANTAB.TXT Comments
- None -

AIPS Output Files
DTSUM_0.LIS
DTSUM_1.LIS
LISTR.LIS
PRTAN.LIS
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
UVPLT_UV.PS		 SN_CALIB_RAT_2.PS
SN_CALIB_SNR_1.PS
SN_CALIB_SNR_2.PS
UVPLT_UVD.PS
UVPLT_UVPA.PS
IMAGE.FITS


Difmap Data Reduction Notes
Phase selfcal applied? Yes
Global amplitude selfcal (gscal) applied? Yes
Amplitude selfcal on non-global timescales used? No
Modelfit made and saved? No
Image Made and saved? Yes
Comments on Difmap processing
average data over 30 sec (uvaver 30,true)

keep non-closing data during self-cal (selfflag false,3,4)

clean and phase self-cal with uniform weighting (uvw 2,-1 ... etc)

switch to natural weighting to clean more flux (uvw 0,-1 ... etc)

try gscale (gscale true)

MOPRA 1.03 ATCA 1.04 USUDA 1.05 VSOP_TZ 0.97

MOPRA 1.11 ATCA 1.04 USUDA 1.06 VSOP_TZ 0.95

switch back to obtain a uniform weighting clean image.

Image
Ampl, Phase vs (u,v) Distance
PS (60 kb)
JPEG (40 kb)
 Ampl, Phase vs Time
PS (156 kb)
JPEG 1, 2		 (u,v) Coverage
PS (31 kb)
JPEG (25 kb)
Closure Phase vs Time
PS (105 kb)
JPEG 1		 Clean Image
PS (50 kb)
JPEG (44 kb)


Last updated on Tue May 6 06:18:51 GMT 2003
by db_results.pl version 0.3.