VS07z Results
Submitted checklist.txt and checklist.tex is also available		   [Summary | AIPS | Difmap ]
Analyst: William Scott
Date Prepared: 26-06-2000
 

Summary
 
Observation code : VS07z    AIPS Version : 15Apr99 
Date of Observation : 1999/236    Difmap Version : 2.3c 
Source Name : J0424+00    vsop_difmap used : Yes 
Calibration Source(s) :          
Ground telescopes : Mp, Ho  Model Fitted to data : No 
Tracking Station(s) : gz    Image made : No 
Correlator : Penticton         

 
Abstract
No space fringes were found....recommend re-scheduling this experiment.


AIPS Data Reduction Notes
 
Task
Adverbs
CL
in
SN
in
CL
out
SN
out
Comments
FITLD DIGICOR=DELCOR=-1
 
 
 
 
 Output file name = VS07Z.FITLD 
MSORT
 
 
 
 
 Input file name = VS07Z.FITLD, Output file name = VS07Z.UVSRT 
INDXR
 
 
 
 
 Created NX(1) There was no CSEs. Try FRINGing next (before ANTAB etc., since I'm not sure if I can get any Halca fringes. 
TBIN
 
 
 
1 
 Read in DQA1 delay and rate solutions. SN table uses MP as the reference antenna. Zeroed the rates, since had only one good rate solution for Halca. Good DQA1 solutions existed for Mp-Ho, but not for Halca baselines (except for one solution at the end of the observation). Hopefully, if this one Halca solution is legit, it will enable me to use a small FRING window to find more FRING solutions. 
CLCAL OPCODE = CALP
INTERPOL = 'AMBG'
REFANT 1 (AT)
1 
1 
2 
 
  
FRING DOCALIB 1
GAINUSE 2
REFANT 3 (Mp)
SEARCH 2
SOLINT 5
APARM(1)=2
APARM(7)=2 (SNR=2)
APARM(9)=1
DPARM(0)=3 (no baseline
   stacking for now)
DPARM(2)=200 (200ns delay
   window!)
DPARM(3)=100 (100mHz rate
   window)
DPARM(4)=0.5 (0.5 sec integration
   time)
DPARM(5)=1 (No LS solution
   for now)
DPARM(6)=1 (don't average
   in frequency)
BCHAN 0, ECHAN 0
TIMER 0
2 
 
 
2 
 Only Ho-Mp solutions....try a smaller solint in case the coherence time is small. (and reduce timer to save time). 
FRING As above but with:
SOLINT=1
TIMER 0 21 0 0 0 25 0 0
2 
 
 
2 
 Nada...go back to original solint, and try a larger window 
FRING DPARM(2) 500
SOLINT=5
TIMER 0 21 0 0 0 25 0 0
2 
 
 
2 
 Nope....try a moderately small window, with only 2 antennas, and moderate solint 
FRING DPARM(2) 100
DPARM(3) 50
SOLINT=3
TIMER 0 21 0 0 0 25 0 0
ANTENNAS 1,2 then 1,3
2 
 
 
2 
 Nothing....try a really small window to up the SNR. 
FRING DPARM(2) 30
DPARM(3) 20
SOLINT=5
TIMER 0 21 0 0 0 25 0 0
2 
 
 
2 
 The worst yet, go back to moderate sized window, but will use baseline stacking and LS solutions. 
FRING DPARM(3)=3 (use baseline
   stacking)
DPARM(2)=200 (200ns delay
   window!)
DPARM(3)=100 (100mHz rate
   window)
DPARM(5)=0 (Try LS solution)
DPARM(6)=1 (don't average
   in frequency)
SOLINT=5
TIMER 0 21 0 0 0 25 0 0
2 
 
 
2 
 No good...perhap the one solution I thought was good in the DQA1 was actually bogus. Use a wide open window on the original CL table. 
FRING GAINUSE 1
DPARM(3)=0 (go back to
   just the FFT solution)
DPARM(2)=2000 (2000ns delay
   window)
DPARM(3)=100 (100mHz rate
   window)
DPARM(5)=0 (go back to just
   the FFT solution)
DPARM(6)=1 (don't average
   in frequency)
SOLINT=5
TIMER 0 (since am running
   this overnight)
2 
 
 
2 
 Nothing...try a really huge window and large solint. 
FRING GAINUSE 1
DPARM(3)=0 (go back to
   just the FFT solution)
DPARM(2)=10000 (10000ns delay
   window)
DPARM(3)=200 (200mHz rate
   window)
DPARM(5)=0 (go back to just
   the FFT solution)
DPARM(6)=1 (don't average
   in frequency)
SOLINT=10
TIMER 0 21 0 0 0 25 0 0
2 
 
 
2 
 Nothing...maybe a large window with a short solint??? (with only Halca and one GRT) 
FRING GAINUSE 1
DPARM(3)=0 (go back to
   just the FFT solution)
DPARM(2)=10000 (10000ns delay
   window)
DPARM(3)=200 (200mHz rate
   window)
DPARM(5)=0 (go back to just
   the FFT solution)
DPARM(6)=1 (don't average
   in frequency)
SOLINT=2
TIMER 0 21 0 0 0 25 0 0
ANTENNAS 1,3 then 1,2
2 
 
 
2 
 Nope...give up on Halca fringes. Fringe Mp, Ho to find the amplitude of visibilities on this baseline. 
FRING GAINUSE 1
DPARM(3)=0 (go back to
   just the FFT solution)
DPARM(2)=100 (100ns delay
   window)
DPARM(3)=40 (40mHz rate
   window)
DPARM(5)=0
DPARM(6)=1 (don't average
   in frequency)
SOLINT=2
TIMER 0 21 0 0 0 25 0 0
ANTENNAS 2,3
2 
 
 
2 
  
CLCAL OPCODE = CALP
INTERPOL = 'AMBG'
REFANT 1 (AT)
2 
2 
3 
 
 After applying CL table 3, SPLITTING, FITLDing, then DIFMAPing, flux on the short spacings is about half a Jy or so (mentally applying guestimated SEFDs). This is consistent with the PLS data. amplitude 

AIPS Input Files
Comments
No CSEs, so on INDXR file.

AIPS Output Files
DTSUM_0.LIS
DTSUM_1.LIS
LISTR.LIS		 PRTAN.LIS
UVPLT_UV.PS
UVPLT_UVD.PS		 UVPLT_UVPA.PS


Difmap Data Reduction Notes
Phase selfcal applied? No
Global amplitude selfcal (gscal) applied? No
Amplitude selfcal on non-global timescales used? No
Modelfit made and saved? No
Image Made and saved? No
Comments on Difmap processing
No space fringes and only 2 GRTs...Difmaping (other than to verify amp on the Ho-Mp baseline) done.



Last updated on Sun Aug 20 00:49:55 GMT 2000
by db_results.pl version 0.2.0.