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To whom it may concern:<div><br class="webkit-block-placeholder"></div><div>I've uncovered a possible bug in LISTR when using OPTYPE='MATX' and STOKES='POLC' with multiple IFs. I'm currently calibrating some 13cm WSRT data in AIPS. (The 13cm feed at WSRT is the only circularly polarized feed at WSRT so you don't need to do anything special in AIPS to calibrate this data). This data has 8 IFs. When I run LISTR on polarization calibrated data with bif=1;eif=8, I get a consistent R-L angle for all antennas for IF 1, but not for IFs 2 through 8. However, when I run each IF separately through LISTR (e.g. bif=2;eif=2), I get a consistent R-L angle for all antennas in each IF.</div><div><br class="webkit-block-placeholder"></div><div>See below for some example code. I'm using AIPS version 31DEC07.</div><div><br class="webkit-block-placeholder"></div><div>Cheers,</div><div><br class="webkit-block-placeholder"></div><div>Amanda<br><br></div><div>-------------------------------------------------------------------------------------------------------</div><div><br class="webkit-block-placeholder"></div><div>Doing LISTR on all IFs at once:</div><div><br class="webkit-block-placeholder"></div><div><div>AIPS 1: LISTR: Task to print UV data and calibration tables.</div><div>AIPS 1: Adverbs Values Comments</div><div>AIPS 1: ----------------------------------------------------------------</div><div>AIPS 1: USERID 333 User number.</div><div>AIPS 1: INNAME 'N1569' UV data (name).</div><div>AIPS 1: INCLASS 'DAY1C' UV data (class).</div><div>AIPS 1: INSEQ 1 UV data (seq. #). 0 => high</div><div>AIPS 1: INDISK 4 Disk unit #. 0 => any</div><div>AIPS 1: OPTYPE 'MATX' List type:</div><div>AIPS 1: 'MATX','LIST','GAIN','SCAN'</div><div>AIPS 1: INEXT 'CL' CL, SN or TY table for 'GAIN'</div><div>AIPS 1: INVER 0 CL, Sn or TY table version</div><div>AIPS 1: SOURCES '3C286' Source list</div><div>AIPS 1: *rest ' '</div><div>AIPS 1: CALCODE ' ' Calibrator code ' '=>all</div><div>AIPS 1: TIMERANG *all 0 Time range to list</div><div>AIPS 1: STOKES 'POLC' Stokes type to list.</div><div>AIPS 1: SELBAND -1 Bandwidth to select (kHz)</div><div>AIPS 1: SELFREQ -1 Frequency to select (MHz)</div><div>AIPS 1: FREQID -1 Freq. ID to select.</div><div>AIPS 1: None selected => 1.</div><div>AIPS 1: BIF 0 Lowest IF number 0=1</div><div>AIPS 1: EIF 0 Highest IF number</div><div>AIPS 1: BCHAN 1 Low channel number 0=>1</div><div>AIPS 1: ECHAN 0 High channel number</div><div>AIPS 1: ANTENNAS *all 0 Antennas to list</div><div>AIPS 1: BASELINE *all 0 Baselines with ANTENNAS</div><div>AIPS 1: UVRANGE 0 0 UV range in kilolambda</div><div>AIPS 1: SUBARRAY 0 Subarray, 0=>1</div><div>AIPS 1: Cal. info for input:</div><div>AIPS 1: DOCALIB 1 > 0 calibrate data & weights</div><div>AIPS 1: > 99 do NOT calibrate weights</div><div>AIPS 1: GAINUSE 0 CAL (CL or SN) table to apply</div><div>AIPS 1: DOPOL 1 If >0 correct polarization.</div><div><div>AIPS 1: BLVER -1 BL table to apply.</div><div>AIPS 1: FLAGVER 0 Flag table version</div><div>AIPS 1: DOBAND -1 If >0 apply bandpass cal.</div><div>AIPS 1: Method used depends on value</div><div>AIPS 1: of DOBAND (see HELP file).</div><div>AIPS 1: BPVER 0 Bandpass table version</div><div>AIPS 1: SMOOTH *all 0 Smoothing function. See</div><div>AIPS 1: HELP SMOOTH for details.</div><div>AIPS 1: DPARM 1 *rest 0 Control info:</div><div>AIPS 1: DOACOR -1 > 0 include autocorrelations</div><div>AIPS 1: FACTOR 0 When DPARM(5)=0 Multiply</div><div>AIPS 1: gain listings by FACTOR,</div><div>AIPS 1: 0=> use scale factor from</div><div>AIPS 1: first record printed.</div><div>AIPS 1: DOCRT 1 > 0 -> use the terminal,</div><div>AIPS 1: else use the line printer</div><div>AIPS 1: > 72 => terminal width</div><div>AIPS 1: OUTPRINT ' '</div><div>AIPS 1: Printer disk file to save</div><div>AIPS 1: BADDISK *all 0 Disk to avoid for scratch.</div><div><br class="webkit-block-placeholder"></div><div>LISTR OUTPUT:</div><div><br class="webkit-block-placeholder"></div></div></div><div><div>File = N1569 .DAY1C . 1 Vol = 4 Userid = 333 Chans= 1 - 1 IF = 1</div><div>Freq= 2.207656250 GHz Ncor= 4 No. vis= 3150</div><div>Stokes = FULL Subarray = 1</div><div>Applying calibration table 3</div><div>Applying polarization corrections</div><div>Applying flag table 1</div><div> </div><div> </div><div>Time = 1/05:20:40 to 1/05:49:40 Source = 3C286 : 0000</div><div>Flux = 11.7982 Jy, Calcode = , Freq = 2.207656250 GHz</div><div>Phase, 1000 = 1000.00 degrees, averaging type = Vector</div><div>RL in upper right, conjg(LR) in lower left</div><div> </div><div>Ant -- 1-- 2-- 3-- 4-- 5-- 6-- 7-- 8-- 9--10--11--12--13--14</div><div> 1| 55 55 55 54 55 55 55 55 54 54 55 54 53</div><div> 2| 55 55 55 55 55 56 55 54 55 55 55 54 53</div><div> 3| 55 55 55 55 56 55 55 55 55 55 55 54 54</div><div> 4| 55 55 55 55 55 55 55 55 54 55 55 54 54</div><div> 5| 56 55 55 55 55 55 55 55 55 55 55 55 54</div><div> 6| 55 55 55 56 55 56 55 55 54 55 55 54 54</div><div> 7| 56 55 55 55 55 55 55 55 55 55 55 54 54</div><div> 8| 56 55 55 55 55 56 56 55 55 55 55 54 54</div><div> 9| 55 55 56 55 55 55 56 55 55 55 55 55 54</div><div> 10| 56 55 56 56 55 56 56 56 56 56 55 55 54</div><div> 11| 56 56 56 55 55 55 56 56 55 55 56 55 54</div><div> 12| 56 55 56 55 55 56 56 55 55 55 55 55 54</div><div> 13| 56 55 55 55 55 56 56 55 55 55 55 55 55</div><div> 14| 55 55 55 55 55 56 56 56 55 55 55 55 55</div><div>Ampscalar average of matrix = 5.506E+01(2.327E-02) sigma = 3.130E-01</div><div>Vector average of upper data= 5.470E+01 sigma = 1.369E+00</div><div>Vector average of lower data= 5.541E+01 sigma = 1.332E+00</div><div><br class="webkit-block-placeholder"></div><div><div> mazama LISTR(31DEC07) 333 20-NOV-2007 14:10:18 Page 2</div><div>File = N1569 .DAY1C . 1 Vol = 4 Userid = 333 Chans= 1 - 1 IF = 2</div><div>Freq= 2.207656250 GHz Ncor= 4 No. vis= 3150</div><div>Stokes = FULL Subarray = 1</div><div>Applying calibration table 3</div><div>Applying polarization corrections</div><div>Applying flag table 1</div><div> </div><div> </div><div>Time = 1/05:20:40 to 1/05:49:40 Source = 3C286 : 0000</div><div>Flux = 11.7472 Jy, Calcode = , Freq = 2.225781250 GHz</div><div>Phase, 1000 = 1000.00 degrees, averaging type = Vector</div><div>RL in upper right, conjg(LR) in lower left</div><div> </div><div>Ant -- 1-- 2-- 3-- 4-- 5-- 6-- 7-- 8-- 9--10--11--12--13--14</div><div> 1| 104 -13 0 0 0 0 0 0 176 -90 -90 173</div><div> 2| 2 -48 0 0 -114-102 -99-105-101-111-113-102</div><div> 3| 3 -10 -86 -87 -101 -91 -85 -87 -88 -97 -98 -92</div><div> 4| 0 0 -84 -90 -103 -93 -88 -91 -91 -99-101 -94</div><div> 5| -90 0-125-163 -128-110-111-126-112-128-131-110</div><div> 6|</div><div> 7| 0-102 -73-128 -93 -97 -89 -96 -94-111-114 -98</div><div> 8| 0-120 -69 137 -99 -124 -93-111 -99-121-127-102</div><div> 9| 0-113 -97-136-101 -119-102 -108-101-116-120-103</div><div> 10| 139-111 -98-125-101 -117-102 -98 -101-114-117-102</div><div> 11| 123-136-133-174-115 -131-111-113-132 -131-135-111</div><div> 12| -8 -98 -77-103 -92 -112 -95 -87 -93 -92 -110 -96</div><div> 13| -51-101 -83-110 -94 -113 -97 -90 -97 -94-109 -98</div><div> 14| 130 159 51 93 -90 -130 -97 -74 142 -90-131-141</div><div>Ampscalar average of matrix =-9.888E+01(2.248E+00) sigma = 2.923E+01</div><div>Vector average of upper data= 9.159E-02 sigma = 1.587E+01</div><div>Vector average of lower data=-9.007E+01 sigma = 1.213E+01</div><div><br class="webkit-block-placeholder"></div><div>and so on for IFs 3-8. The R-L phases here are polarization calibrated so they should all be more or less the same value, but they don't for IFs 2-8.</div><div><br></div><div>However, when I do the IFs one at a time (here bif=2;eif=2), the R-L phases are consistent with each other, which is what should be happening above.</div><div><br class="webkit-block-placeholder"></div><div><div> mazama LISTR(31DEC07) 333 20-NOV-2007 14:19:18 Page 1</div><div>File = N1569 .DAY1C . 1 Vol = 4 Userid = 333 Chans= 1 - 1 IF =</div><div> 2</div><div>Freq= 2.207656250 GHz Ncor= 4 No. vis= 3150</div><div>Stokes = FULL Subarray = 1</div><div>Applying calibration table 3</div><div>Applying polarization corrections</div><div>Applying flag table 1</div><div> </div><div> </div><div>Time = 1/05:20:40 to 1/05:49:40 Source = 3C286 : 0000</div><div>Flux = 11.7472 Jy, Calcode = , Freq = 2.225781250 GHz</div><div>Phase, 1000 = 1000.00 degrees, averaging type = Vector</div><div>RL in upper right, conjg(LR) in lower left</div><div> </div><div>Ant -- 1-- 2-- 3-- 4-- 5-- 6-- 7-- 8-- 9--10--11--12--13--14</div><div> 1| -113-113-112-113 -113-113-113-113-113-113-114-114</div><div> 2|-112 -112-113-112 -112-113-113-113-113-113-113-114</div><div> 3|-112-112 -112-112 -112-113-113-113-113-113-113-114</div><div> 4|-112-112-112 -113 -112-113-112-113-112-113-113-114</div><div> 5|-112-112-112-112 -112-112-112-112-112-112-113-113</div><div> 6|</div><div> 7|-112-112-112-112-112 -113-112-113-113-113-113-113</div><div> 8|-112-112-112-112-112 -112 -113-113-112-112-113-113</div><div> 9|-112-112-112-112-112 -112-112 -112-112-112-112-113</div><div> 10|-111-112-112-112-112 -111-112-112 -112-112-112-113</div><div> 11|-111-112-112-112-112 -111-112-112-112 -112-112-112</div><div> 12|-112-112-112-112-112 -112-112-112-112-112 -113-113</div><div> 13|-111-112-112-112-112 -111-112-112-112-112-112 -112</div><div> 14|-112-112-112-112-112 -112-112-112-112-112-112-112</div><div>Ampscalar average of matrix =-1.123E+02(1.654E-02) sigma = 2.059E-01</div><div>Vector average of upper data=-1.127E+02 sigma = 1.527E+00</div><div>Vector average of lower data=-1.119E+02 sigma = 1.519E+00</div><div><br class="webkit-block-placeholder"></div></div><div><br></div><div><br class="webkit-block-placeholder"></div></div></div><div><br class="webkit-block-placeholder"></div><div><br class="webkit-block-placeholder"></div><div><br><div> <span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>----------------------------------------------------------------------------------------------------</div><div>Amanda Kepley </div><div>University of Wisconsin-Madison</div><div>Department of Astronomy</div><div>Tel: (608) 263-1460 </div><div><a href="http://www.astro.wisc.edu/~kepley">http://www.astro.wisc.edu/~kepley</a> </div><div>----------------------------------------------------------------------------------------------------</div><div><br></div><div><br></div><div><br></div><div><br></div><br class="Apple-interchange-newline"></span></span></span> </div><br></div></body></html>