VS05s Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: William Scott
Date Prepared: 24-10-2000
 

Summary
 
Observation code : VS05s    AIPS Version : 15Apr99   
Date of Observation : 1997/351    Difmap Version : 2.3c 
Source Name : J1118+12    vsop_difmap used : Yes 
Calibration Source(s) :          
Ground telescopes : Nt, Mp, Se, Ud, Ka  Model Fitted to data : Yes 
Tracking Station(s) : TZ, NZ    Image made : Yes 
Correlator : Penticton         

 
Abstract
This experiment was originally analyzed May 28/98. Comments for the experiment come from a comments file I originally made, as well as what I could make out from a PRTHI. The zero spacing flux appears to be only approximately half of the zero spacing flux from the PLS survey. However, the PLS observation was approximately a year and a half earlier, and was the only observation at 5 GHz I could find that was near in time to the VSOP observation. Since there is always the possibility of source variability, and the PLS zero spacing flux was uncertain anyhow due to a lot of source structure, I decided not to apply any global amplitude corrections with CLCOR. However, there still were several large corrections applied to individual antennas with CLCOR.
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.201541 0.683787 148.913 4.45394 1.00000 -31.4768 0.0005
0.250900 0.0495774 -153.106 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 DIGICOR=DELCOR=-1
 
 
 
 
 Output file name = VS05S.FITLD 
MSORT
 
 
 
 
 Input file name = VS05S.FITLD, Output file name = VS05S.UVSRT 
FIXWT
 
 
 
 
  
INDXR CPARM(1)=3
CPARM(2)=60
CPARM(3)=0.25
 
 
 
 
 Created NX(1) 
ANTAB
 
 
 
 
 For Ka and Ud nominal values were used for the tsys/gain values. For Nt, a gain curve was available, but no Tsys info was supplied. For Se and Mp, both Tsys and gain curves were available. Halca had good calibration info. 
APCAL
 
1 
 
 
 Input: Ty(1) + GC(1) 
CLCAL OPCODE = CALI
INTERPOL = '2PT'
1 
1 
2 
 
  
IBLED
 
 
 
 
  
FRING DOCALIB 1
GAINUSE 2
TIMER 0 20 15 0 0 12 18 0
SOLINT 1
REFANT 5 (Usuda 64m)
APARM(1)=3
APARM(7)=3 (SNR=3)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=500 (500mHz rate
   window)
DPARM(4)=0
DPARM(5)=-1
2 
 
 
2 
 SN(2) removed after attempt. 
FRING DOCALIB 1
GAINUSE 2
TIMER 0 20 15 0 0 12 18 0
SOLINT 3
REFANT 5 (Usuda 64m)
APARM(1)=3
APARM(7)=3 (SNR=3)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=500 (500mHz rate
   window)
DPARM(4)=0
DPARM(5)=-1
2 
 
 
2 
 SN(2) removed after attempt. 
FRING DOCALIB 1
GAINUSE 2
TIMER 0 20 15 0 0 12 18 0
SOLINT 3
REFANT 5 (Usuda 64m)
APARM(1)=3
APARM(7)=3 (SNR=3)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=50 (50 mHz rate
   window)
DPARM(4)=0
DPARM(5)=-1
2 
 
 
2 
 SN(2) removed after attempt. 
FRING DOCALIB 1
GAINUSE 2
TIMER 0 20 15 0 0 12 18 0
SOLINT 5
REFANT 5 (Usuda 64m)
APARM(1)=3
APARM(7)=3 (SNR=3)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=50 (50 mHz rate
   window)
DPARM(4)=0
DPARM(5)=-1
2 
 
 
2 
 SN(2) removed after attempt. 
FRING DOCALIB 1
GAINUSE 2
TIMER 0 20 15 0 0 12 18 0
SOLINT 2
REFANT 5 (Usuda 64m)
APARM(1)=3
APARM(7)=3 (SNR=3)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=50 (50 mHz rate
   window)
DPARM(4)=0
DPARM(5)=-1
2 
 
 
2 
  
TACOP
 
2 
 
3 
  
TBOUT INEXT = 'SN'
INVER=3
 
3 
 
 
 Editted the manual phase-cal solution??? 
TBIN
 
 
 
3 
  
CLCAL INTERPOL=2PT
OPTYPE=CALI
2 
3 
3 
 
  
FRING DOCALIB 1
GAINUSE 3
TIMER 0 17 0 0 0 17 5 0
SOLINT 3
REFANT 5 (Usuda 64m)
APARM(1)=2
APARM(7)=3 (SNR=3)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=100 (100 mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=-1
3 
 
 
4 
 Removed SN(4) after attempt. 
FRING DOCALIB 1
GAINUSE 3
TIMER 0 17 0 0 0 17 2 0
SOLINT 3
REFANT 5 (Usuda 64m)
APARM(1)=2
APARM(7)=3 (SNR=3)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=100 (100 mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=-1
3 
 
 
4 
 Removed SN(4) after attempt. 
FRING DOCALIB 1
GAINUSE 3
TIMER 0
SOLINT 3
REFANT 5 (Usuda 64m)
APARM(1)=2
APARM(7)=3 (SNR=3)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=100 (100 mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=-1
3 
 
 
4 
  
FRING DOCALIB 1
GAINUSE 3
TIMER 0
SOLINT 3
REFANT 5 (Usuda 64m)
APARM(1)=2
APARM(7)=5 (SNR=5)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=100 (100 mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=-1
3 
 
 
5 
  
FRING DOCALIB 1
GAINUSE 3
TIMER 0 17 30 0 0 18 0 0
SOLINT 3
REFANT 5 (Usuda 64m)
APARM(1)=2
APARM(7)=5 (SNR=5)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=100 (100 mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=-1
3 
 
 
6 
  
FRING DOCALIB 1
GAINUSE 3
TIMER 0
SOLINT 3
REFANT 5 (Usuda 64m)
APARM(1)=2
APARM(7)=5 (SNR=5)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=100 (100 mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=-1
3 
 
 
7 
  
FRING DOCALIB 1
GAINUSE 3
TIMER 0
SOLINT 3
REFANT 5 (Usuda 64m)
APARM(1)=2
APARM(7)=4 (SNR=4)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=100 (100 mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=-1
3 
 
 
8 
  
FRING DOCALIB 1
GAINUSE 3
TIMER 0 17 30 0 0 18 0 0
SOLINT 5
REFANT 5 (Usuda 64m)
APARM(1)=2
APARM(7)=4 (SNR=4)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=100 (100 mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=-1
3 
 
 
9 
  
FRING DOCALIB 1
GAINUSE 3
TIMER 0
SOLINT 5
REFANT 5 (Usuda 64m)
APARM(1)=2
APARM(7)=4 (SNR=4)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=16000 (16000 ns
   delay window)
DPARM(3)=100 (100 mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=-1
3 
 
 
10 
  
TACOP
 
10 
 
11 
  
TACOP
 
11 
 
4 
 ??? 
TACOP
 
11 
 
5 
 ??? 
CLCAL INTERPOL=AMBG
OPTYPE=CALI
3 
5 
4 
 
  
TBOUT INEXT = 'AN'
 
 
 
 
  
TBIN
 
 
 
 
 Changed MNTSTA entries in the AN table. Changed Halca from 3 to 2. 
TACOP
4 
 
5 
 
  
CLCOR OPCODE 'GAIN'
ANTENNAS 5 (Ud)
CLCORPRM 1.85
5 
 
5 
 
 Correction due to comparing crossing points. 
CLCOR OPCODE 'GAIN'
ANTENNAS 6 (Ka)
CLCORPRM 8.4
5 
 
5 
 
 Correction due to comparing crossing points. 
CLCOR OPCODE 'GAIN'
ANTENNAS 3 (Se)
CLCORPRM 10.05
5 
 
5 
 
 Correction for typo in ANTAB file. 
SPLIT SOURCES 'J1118+12'
DOCALIB 1, GAINUSE 5
BCHAN 20, ECHAN 230
5 
 
 
 
 Input file: VS05S.FIXWT, Output file: J1118+12.FITS 
FITTP
 
 
 
 
 Input file: J1118+12.FITS, Output file: J1118+12.FITS amplitude 

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

AIPS Output Files
DTSUM_0.LIS
DTSUM_1.LIS
LISTR.LIS
PRTAN.LIS
POSSM01_AP_1.PS
POSSM02_AP_1.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		 UVPLT_UV.PS
UVPLT_UVD.PS
UVPLT_UVPA.PS
VPLOT_AP_1.PS
VPLOT_AP_2.PS
WEIGHTS.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
Flagged out Sh and Ha, IF2 due to lack of phase coherence. All Ha-Ka data was also flagged due to lack of phase coherence and anomalously large visibility amplitudes. Ran amp+phase self-cal down to a 30 minute solution interval. All amplitude self-calibration was done using dofloat=false (the total flux was conserved). The final image was only slightly resolved (all clean components were aligned along the major axis of the beam). It was unfortunate that the major axis PA of the beam coincided with the PA of th extended emission in both the PLS image and USNO image. No evidence of the extended emission was found in the final image (not sensitive enough?). Additional images were made, applying a uvtaper to look for low-surface brightness extended emission, and with a larger mapsize (1024X1024)...but with essentially the same result.

Image
Ampl, Phase vs (u,v) Distance
PS (47 kb)
JPEG (42 kb)
 Ampl, Phase vs Time
PS (312 kb)
JPEG 1, 2, 3		 (u,v) Coverage
PS (25 kb)
JPEG (26 kb)
Closure Phase vs Time
PS (322 kb)
JPEG 1, 2		 Clean Image
PS (40 kb)
JPEG (46 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (47 kb)
JPEG (42 kb)
 Ampl, Phase vs Time
PS (310 kb)
JPEG 1, 2, 3		 (u,v) Coverage
PS (25 kb)
JPEG (26 kb)
Closure Phase vs Time
PS (321 kb)
JPEG 1, 2		 Image with model components
PS (43 kb)
JPEG (41 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)
0.201541 0.683787 148.913 4.45394 1.00000 -31.4768 0.0005
0.250900 0.0495774 -153.106 0 0 0 0.0000
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Thu May 17 05:59:50 GMT 2001
by db_results.pl version 0.3.