public:meetings:glowbi2008:tutorial_wednesday

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public:meetings:glowbi2008:tutorial_wednesday [2010-11-16 20:42] – James M Andersonpublic:meetings:glowbi2008:tutorial_wednesday [2017-03-08 15:27] (current) – external edit 127.0.0.1
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 ===== Web Image of 3C129 ===== ===== Web Image of 3C129 =====
  
-{{http://rsd-www.nrl.navy.mil/7210/7213/backgrnd/3c129_pub.jpg}}+{{https://www.nrl.navy.mil/rsd/sites/www.nrl.navy.mil.rsd/files/Images/radiogalaxy.jpg}}
  
 Wide-field 90 cm image of the large head-tail radio galaxy 3C129 (right). The bright source at the left is 3C129.1. From Lane et al., AJ, 123, 2985, 2002. Wide-field 90 cm image of the large head-tail radio galaxy 3C129 (right). The bright source at the left is 3C129.1. From Lane et al., AJ, 123, 2985, 2002.
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 minphser 10\\ minphser 10\\
 weightit 1\\ weightit 1\\
-get2n 6\\+get2n 10\\
 ncomp 0\\ ncomp 0\\
 solmode 'A&P'\\ solmode 'A&P'\\
 aparm(6) 2\\ aparm(6) 2\\
-solint 2\\+solint 1\\
 solsub 2\\ solsub 2\\
 cparm(3) 10\\ cparm(3) 10\\
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 clrmsg\\ clrmsg\\
 '' ''
 +
 +==== Calibrate 3C48 ====
 +
 +''
 +get2n 11\\
 +calsour '0134+329',' '\\
 +solint 1\\
 +uvrange 0\\
 +go\\
 +clrmsg\\
 +''
 +
  
 ==== Calibrate the phase calibrator ==== ==== Calibrate the phase calibrator ====
 +
 +In this step we will try to get an amplitude calibration of the phase calibrator.  Only the first scan seems to be good in amplitude, so set the time range for just it.
 +
  
 '' ''
 clr2n\\ clr2n\\
 calsour '0420+417', ' '\\ calsour '0420+417', ' '\\
-solint 0\\+solint 40./60\\
 uvrange 0\\ uvrange 0\\
 +timer 101 0 0 0 101 8 0 0\\
 go\\ go\\
 clrmsg\\ clrmsg\\
 '' ''
 +
 ==== Check the results ==== ==== Check the results ====
  
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 go\\ go\\
 inver 2\\ inver 2\\
 +optype 'amp'\\
 +go\\
 +optype 'phas'\\
 +go\\
 +inver 3\\
 optype 'amp'\\ optype 'amp'\\
 go\\ go\\
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 task 'getjy'\\ task 'getjy'\\
 sources '0420+417', ' '\\ sources '0420+417', ' '\\
-calsour '0518+165',' '\\+calsour '0518+165','0134+329',' '\\
 calcode ' '\\ calcode ' '\\
 bif 0\\ bif 0\\
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 <file> <file>
-vlb054> GETJY1: Task GETJY  (release of 31DEC08) begins\\+vlb054> GETJY1: Task GETJY  (release of 31DEC10) begins 
 +vlb054> GETJY1: Calibrator robust averaging used    818 of    818 gain samples
 vlb054> GETJY1:    Source:Qual      CALCODE IF  Flux (Jy) vlb054> GETJY1:    Source:Qual      CALCODE IF  Flux (Jy)
-vlb054> GETJY1: 0420+417        :  3   B     1    1.33893 +/-   0.00641 +vlb054> GETJY1: 0420+417        :  2   B     1    1.50919 +/-   0.00369  0.00369 
-vlb054> GETJY1:                              2    1.34714 +/-   0.00525+vlb054> GETJY1:                              2    1.50224 +/-   0.00401  0.00401 
 +vlb054> GETJY1:    Source:Qual    CALCODE    used   total     bad used  tot  bad 
 +vlb054> GETJY1: 0420+417        :  2 B        416     416       0  104  104    0
 vlb054> GETJY1: Appears to have ended successfully vlb054> GETJY1: Appears to have ended successfully
-vlb054> GETJY1: vlb054       31DEC08 TST: Cpu=       0.0  Real=       0+vlb054> GETJY1: vlb054       31DEC10 TST: Cpu=       0.0  Real=       0
 </file> </file>
  
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 ==== Redo the phase calibrator calibration ==== ==== Redo the phase calibrator calibration ====
  
-Now that we know the flux density of the phase calibrator, run through its calibration again, just to be sure AIPS doesn't have some information left around from calibrating before with an unknown flux density.+Now that we know the flux density of the phase calibrator, run through its calibration again, just to be sure AIPS doesn't have some information left around from calibrating before with an unknown flux density.  This time, run through the entire time range.
  
  
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 '' ''
 inext 'sn'\\ inext 'sn'\\
-inver 2\\+inver 3\\
 extdest\\ extdest\\
 inver 0\\ inver 0\\
 tget calib\\ tget calib\\
 +timer 0\\
 go\\ go\\
 clrmsg\\ clrmsg\\
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 '' ''
 task 'clcal'\\ task 'clcal'\\
-sources '0518+165','0420+417', '3C129', ' '\\ +sources '0518+165','0420+417', '0134+329','3C129', ' '\\ 
-calsour '0518+165','0420+417', ' '\\+calsour '0518+165','0420+417', '0134+329',' '\\
 opcode 'cali'\\ opcode 'cali'\\
 gainver 1\\ gainver 1\\
 gainuse 2\\ gainuse 2\\
-refant 4\\+refant 3\\
 interp '2pt'\\ interp '2pt'\\
 doblank 1\\ doblank 1\\
 go\\ go\\
 '' ''
 +
 ===== Check the results ===== ===== Check the results =====
  
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 task 'tasav'\\ task 'tasav'\\
 clro\\ clro\\
 +outdi 1\\
 go\\ go\\
 '' ''
 +
 ==== Run the polarization calibration on the phase calibrator ==== ==== Run the polarization calibration on the phase calibrator ====
  
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 timer 0\\ timer 0\\
 antenna 0\\ antenna 0\\
-uvrange 0\\+uvrange 20,0\\
 bif 0\\ bif 0\\
 eif 0\\ eif 0\\
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 soltype 'appr'\\ soltype 'appr'\\
 prtlev 1\\ prtlev 1\\
-refant 4\\+refant 3\\
 bparm 0\\ bparm 0\\
 cparm 0\\ cparm 0\\
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 <file> <file>
-vlb054> PCAL 1: Calibration source   1 +vlb054> PCAL 1: Calibration source   1   0420+417 
-vlb054> PCAL 1:   Q+iU=(   0.00444,  -0.04706) +/- (  0.000273,  0.000273) Jy +vlb054> PCAL 1:   Q+iU=(  -0.01935,   0.08692) +/- (  0.000536,  0.000536) Jy 
-vlb054> PCAL 1:   Pol. inten. =   0.04727 +/-  0.000386 Jy, angle = -42.30 +/- +vlb054> PCAL 1:   Pol. inten. =   0.08905 +/-  0.000758 Jy 
-vlb054>         0.165 deg +vlb054> PCAL 1:   Pol. angle  =  51.28 +/-  0.172 deg 
-vlb054> PCAL 1: 0420+417         I,Q,U,V =   1.3389  0.00444 -0.04706  0.00000 J +vlb054> PCAL 1: 0420+417         I,Q,U,V=   1.5092 -0.01935  0.08692  0.00000 Jy 
-vlb054>         y +vlb054> PCAL 1: Calibration source   1   0420+417 
-vlb054> PCAL 1: Calibration source   1 +vlb054> PCAL 1:   Q+iU=(   0.08929,  -0.01579) +/- (  0.000699,  0.000699) Jy 
-vlb054> PCAL 1:   Q+iU=(   0.02002,   0.03901) +/- (  0.000277,  0.000277) Jy +vlb054> PCAL 1:   Pol. inten. =   0.09068 +/-  0.000988 Jy 
-vlb054> PCAL 1:   Pol. inten. =   0.04385 +/-  0.000392 Jy, angle =  31.42 +/- +vlb054> PCAL 1:   Pol. angle  =  -5.02 +/-  0.221 deg 
-vlb054>         0.181 deg +vlb054> PCAL 1: 0420+417         I,Q,U,V=   1.5022  0.08929 -0.01579  0.00000 Jy
-vlb054> PCAL 1: 0420+417         I,Q,U,V =   1.3471  0.02002  0.03901  0.00000 J +
-vlb054>         y+
 </file> </file>
  
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 timer 0\\ timer 0\\
 antenna 0\\ antenna 0\\
-uvrange 0,45\\+uvrange 0\\
 docalib 1\\ docalib 1\\
 gainuse 2\\ gainuse 2\\
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 AIPS 1: Adverbs     Values                 Comments AIPS 1: Adverbs     Values                 Comments
 AIPS 1: ---------------------------------------------------------------- AIPS 1: ----------------------------------------------------------------
-AIPS 1: CLCORPRM    132.6554    -74.984    R-L phase difference returned+AIPS 1: CLCORPRM    -55.2632   -171.0893   R-L phase difference returned
 AIPS 1:            *rest 0 AIPS 1:            *rest 0
 </file> </file>
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 task 'tasav'\\ task 'tasav'\\
 clro\\ clro\\
 +outdi 1\\
 go\\ go\\
 '' ''
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 http://www.vla.nrao.edu/astro/calib/polar/1999/ http://www.vla.nrao.edu/astro/calib/polar/1999/
  
-Correct number is -21.71+Correct number is -22.98
  
  
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 '' ''
-for i=1 to 2;clcorp(i) = -21.71 - clcorp(i);end+for i=1 to 2;clcorp(i) = -22.98 - clcorp(i);end
 '' ''
 +
 ==== Apply the corrections ==== ==== Apply the corrections ====
  
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 timer 0\\ timer 0\\
 antenna 0\\ antenna 0\\
-uvrange 0,45\\+uvrange 0\\
 docalib 1\\ docalib 1\\
 gainuse 3\\ gainuse 3\\
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 ########################## ##########################
 +
 ===== Work on just the target data now ===== ===== Work on just the target data now =====
  
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 '' ''
 task 'split'\\ task 'split'\\
-getn 4\\ +getn 12\\ 
-source '3C129', ' '\\+source '0518+165','0134+329','0420+417','3C129', ' '\\
 timer 0\\ timer 0\\
 bif 0\\ bif 0\\
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 aparm 0\\ aparm 0\\
 go\\ go\\
-getn 13\\+getn 16\\
 go\\ go\\
 clrmsg\\ clrmsg\\
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 '' ''
 task 'dbcon'\\ task 'dbcon'\\
-getn 16\\ +getn 20\\ 
-get2n 17\\+get2n 26\\
 go\\ go\\
 pcat\\ pcat\\
Line 1978: Line 2008:
  
 <file> <file>
-AIPS 1:   18  101 3C129       .DBCON .    1 UV 13-NOV-2008 18:28:31+AIPS 1:   27  100 3C129       .DBCON .    1 UV 16-NOV-2010 22:13:56
 </file> </file>
 +
 ===== Imaging ===== ===== Imaging =====
  
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 '' ''
 task 'imagr'\\ task 'imagr'\\
-getn 18\\+default\\ 
 +getn 27\\
 stokes 'i'\\ stokes 'i'\\
 dopol 0\\ dopol 0\\
-cellsize 0.25,0.25\\+cellsize 0.15,0.15\\
 imsize 2048,2048\\ imsize 2048,2048\\
 clr2n\\ clr2n\\
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 niter 20000\\ niter 20000\\
 overlap 1\\ overlap 1\\
 +dotv 1\\
 go\\ go\\
 clrmsg\\ clrmsg\\
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 clrmsg\\ clrmsg\\
 '' ''
 +
 +
  
 ==== Check where the files went ==== ==== Check where the files went ====
  • Last modified: 2010-11-16 20:42
  • by James M Anderson