VS06h Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: William Scott
Date Prepared: 23-10-2001
 

Summary
 
Observation code : VS06h    AIPS Version : 31DEC00   
Date of Observation : 2001/196    Difmap Version : 2.3c 
Source Name : J0116-11    vsop_difmap used : Yes 
Calibration Source(s) : J0204+15, J0106-40         
Ground telescopes : Se, Ho, Hh, Cd  Model Fitted to data : Yes 
Tracking Station(s) : UZ    Image made : Yes 
Correlator : Penticton         

 
Abstract
PLS radplot of source (J0116-11) showed lots of structure, with 140 Mlambda flux between about 0.3 and 0.5 Jy. AT light curve showed slow variability with zero-spacing flux in 1999 about 0.9Jy. Uncorrected (using only ANTAB values) amplitudes had a flux at 160Mlambda of about 0.5Jy (Hh-Se baseline). Shortest Halca baseline (Cd-Halca) almost overlapped the Se-Hh baseline, however no Halca fringes were found at all. Fringes were also not found to Ho, but all other GRT fringes were found. Flux for calibrators seemed low by between about a factor of 1.25 to 1.5. Since there appears to be enough power on the long baselines (at least around the Se-Hh track) (even taking into account that the flux may be too low by about 1.25 to 1.5, but no Halca fringes were found, I suggest re-scheduling this experiment.

EBF:09-OCT-2005: I think this experiment is okay. The lack of fringes on VSOP baselines is not unexpected.

Did some remodeling to be consistent with VLBApls
Model
Flux (Jy)
Radius (mas)
Theta (deg)
Major (mas)
Axial ratio
Phi (deg)
TB (10^12 K)
0.0455039 0.987828 -41.2959 0.552806 1.00000 135.385 0.0073
0.585174 0.0143310 66.7150 0.912368 0.345393 -30.8776 0.0993
(*) 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 = VS06H.FITLD 
MSORT
 
 
 
 
 Input file name = VS06H.FITLD, Output file name = VS06H.UVSRT 
FIXWT
 
 
 
 
 Not done. 
INDXR CPARM(1)=3
CPARM(2)=60
CPARM(3)=0.25
 
 
 
 
 Created NX(1) 
ANTAB
 
 
 
 
 Used nominal DPFUs for Ho and Halca. For Halca used a Tsys of 88K, 92K. For Se used a nominal Tsys of 88.8K. For all other GRTs (Ho, Cd, Hh) had non-nominal Tsys values. 
APCAL
 
1 
 
 
 Input: Ty(1) + GC(1) 
CLCAL OPCODE = CALP
INTERPOL = 'AMBG'
REFANT 1 (Cd)
1 
1 
2 
 
  
TBOUT INEXT = 'AN'
 
 
 
 
  
TBIN
 
 
 
 
 Changed MNTSTA entries in the AN table. Changed Halca from 3 to 2, and changed Hh and Ho to 0. 
TBIN
 
 
 
2 
 Read in DQA1 delay and rate solutions. Cd was used as the refant. 
TAFLG OPTYPE '= '
APARM 4,0 (column 4 = antenna
   column)
BPARM 1,3 (Ho = antenna 3)
CPARM 0
 
2 
 
3 
 Flagged out Ho solutions as they were all over the place in the DQA1 report (although the DQA1 report classified them as good!). 
TAFLG OPTYPE '= '
APARM 4,0 (column 4 = antenna
   column)
BPARM 1,5 (Halca = antenna 5)
CPARM 0
 
3 
 
4 
 Flagged out Halca solutions as they were all over the place in the DQA1 report (although the DQA1 report classified them as good!). 
CLCAL OPCODE = CALP
INTERPOL = 'AMBG'
REFANT 1 (Cd)
2 
4 
3 
 
  
FRING DOCALIB 1
GAINUSE 3
TIMER 0
ANTENNAS -3 (Don't do Ho
   for now since no fringes
in the DQA1 report. Just
   look for
Halca fringes)
SOLINT 10
REFANT 1
APARM(1)=2
APARM(7)=3 (SNR=3)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=2000 (2000 ns delay
   window)
DPARM(3)=100 (100mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=0
DPARM(6)=1
3 
 
 
5 
 Look for Halca solutions with a large window and long solint. None found. 
FRING DOCALIB 1
GAINUSE 3
TIMER 0
ANTENNAS -3
SOLINT 2
REFANT 1
APARM(1)=2
APARM(7)=3 (SNR=3)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=2000 (2000 ns delay
   window)
DPARM(3)=100 (100mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=0
DPARM(6)=1
3 
 
 
6 
 Look for Halca solutions with a large window and short solint. None found. 
FRING DOCALIB 1
GAINUSE 3
TIMER 0
ANTENNAS -3
SOLINT 2
REFANT 4
APARM(1)=2
APARM(7)=3 (SNR=3)
DPARM(1)=3 (include baseline
   stacking)
DPARM(2)=2000 (2000 ns delay
   window)
DPARM(3)=100 (100mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=0
DPARM(6)=1
3 
 
 
7 
 As above, but change the refant. No luck. 
FRING DOCALIB 1
GAINUSE 3
TIMER 0
ANTENNAS -3
SOLINT 2
REFANT 1
APARM(1)=2
APARM(7)=1 (SNR=1)
DPARM(1)=1 (nuke baseline
   stacking)
DPARM(2)=2000 (2000 ns delay
   window)
DPARM(3)=100 (100mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=1 (No LS solution)
DPARM(6)=1
3 
 
 
8 
 As above, but change refant/SNR and nuke baseline stacking, and forget about LS solutions. Still no Halca fringes. 
FRING DOCALIB 1
GAINUSE 3
TIMER 0
ANTENNAS -3
SOLINT 2
REFANT 4
APARM(1)=2
APARM(7)=1 (SNR=1)
DPARM(1)=1 (nuke baseline
   stacking)
DPARM(2)=2000 (2000 ns delay
   window)
DPARM(3)=100 (100mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=1 (No LS solution)
DPARM(6)=1
3 
 
 
9 
 As above, but change refant to Se. Found some Halca solutions, but realized they were bogus...AIPS was just using Halca as the refant when Se had no data. Give up on finding fringes to Halca. When Halca was refant, delays were not zero however... don't understand this. 
FRING DOCALIB 1
GAINUSE 3
TIMER 0
ANTENNAS -5
SOLINT 2
REFANT 1
APARM(1)=2
APARM(7)=1 (SNR=1)
DPARM(1)=3 (baseline
   stacking)
DPARM(2)=2000 (2000 ns delay
   window)
DPARM(3)=100 (100mHz rate
   window)
DPARM(4)=0.5
DPARM(5)=0 (Do LS solution)
DPARM(6)=1
3 
 
 
10 
 Abandon Halca. Do one run of FRING to see if I can get some Ho fringes. No luck...won't bother to kill myself trying to find Ho fringes, since there was no Halca anyhow, and I suspect there was a problem with Ho, since it was bogus for three consecutive experiments. 
SPLIT DOCALIB 1, GAINUSE 3
3 
 
 
 
 Input file: VS06H.UVSRT, Output file: J0116-11.VS06H, J0204+15.VS06H, J0106-40.VS06H 
FITTP
 
 
 
 
 Input file: J0116-11.VS06H, J0204+15.VS06H, J0106-40.VS06H Output file: J0116-11.FITS, J0204+15.FITS, J0106-40.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
SN_APCAL_AMP_1.PS
POSSM02_AP_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
SN_FRING02_DEL_1.PS
SN_FRING02_DEL_2.PS
SN_FRING02_RAT_1.PS
SN_FRING02_RAT_2.PS
SN_FRING02_SNR_1.PS
SN_FRING02_SNR_2.PS
SN_FRING03_DEL_1.PS
SN_FRING03_DEL_2.PS
SN_FRING03_RAT_1.PS
SN_FRING03_RAT_2.PS
SN_FRING03_SNR_1.PS
SN_FRING03_SNR_2.PS
SN_FRING04_DEL_1.PS
SN_FRING04_DEL_2.PS
SN_FRING04_RAT_1.PS
SN_FRING04_RAT_2.PS
SN_FRING04_SNR_1.PS
SN_FRING04_SNR_2.PS		 SN_FRING05_DEL_1.PS
SN_FRING05_DEL_2.PS
SN_FRING05_RAT_1.PS
SN_FRING05_RAT_2.PS
SN_FRING05_SNR_1.PS
SN_FRING05_SNR_2.PS
SN_FRING6_DEL_1.PS
SN_FRING6_DEL_2.PS
SN_FRING6_RAT_1.PS
SN_FRING6_RAT_2.PS
SN_FRING6_SNR_1.PS
SN_FRING6_SNR_2.PS
UVPLT_UV.PS
UVPLT_UVD.PS
UVPLT_UVPA.PS
VPLOT_AP_1.PS
VPLOT_AP_2.PS
WEIGHTS.PS
IMAGE.FITS


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
Overall amplitudes seem low based upon the calibrator sources, however there is not a whole lot of information to go on to determine what the appropriate antenna correction factors are, so I did not scalant any of the antennas (image will only be a ground-only image anyhow).

EBF: 09-OCT-2005: Image is ground based only. Lack of VSOP fringes is probably okay. No apparent core. Smaller component is probably in the jet.

Image
Ampl, Phase vs (u,v) Distance
PS (42 kb)
JPEG (45 kb)
 Ampl, Phase vs Time
PS (203 kb)
JPEG 1, 2, 3		 (u,v) Coverage
PS (21 kb)
JPEG (26 kb)
Closure Phase vs Time
PS (265 kb)
JPEG 1, 2		 Clean Image
PS (30 kb)
JPEG (60 kb)
Modelfit
Ampl, Phase vs (u,v) Distance
PS (42 kb)
JPEG (45 kb)
 Ampl, Phase vs Time
PS (205 kb)
JPEG 1, 2, 3		 (u,v) Coverage
PS (21 kb)
JPEG (26 kb)
Closure Phase vs Time
PS (264 kb)
JPEG 1, 2		 Image with model components
PS (32 kb)
JPEG (38 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)
0.0455039 0.987828 -41.2959 0.552806 1.00000 135.385 0.0073
0.585174 0.0143310 66.7150 0.912368 0.345393 -30.8776 0.0993
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.


Last updated on Wed Oct 12 00:35:00 UTC 2005
by db_results.pl version 0.3.