public:meetings:glowbi2008:tutorial_wednesday

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public:meetings:glowbi2008:tutorial_wednesday [2010-11-16 20:55] – 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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 ==== 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\\
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 <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 20:55
  • by James M Anderson