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<p class="MsoNormal">Yes. The plot shows how Q and U varies with time for a variable source (Sgr A*) since DFTPL has the list of IQUV as a function of time. The plot is similar to FRPA in DFTPL.
<o:p></o:p></p>
<p class="MsoNormal">I have to check what DFTIM is! Never used it. <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Thanks, <o:p></o:p></p>
<p class="MsoNormal">Farhad<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Get <a href="https://aka.ms/GetOutlookForMac"><span style="color:blue">Outlook for Mac
</span></a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="color:black">From:
</span></b><span style="color:black">Eric Greisen <egreisen@nrao.edu><br>
<b>Date: </b>Tuesday, August 26, 2025 at 11:21</span><span style="font-family:"Arial",sans-serif;color:black"> </span><span style="color:black">AM<br>
<b>To: </b>Farhad Zadeh <zadeh@northwestern.edu><br>
<b>Cc: </b>daip <daip@nrao.edu><br>
<b>Subject: </b>Re: Fwd: UVfits {External}<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">DFTPL and DFTIM use time as one of the fundamental axes. What you are asking for seems to be a histogram image with Q and U amplitudes as the two axes. Is that right? The task UVHIM would be a place where that
could be inserted.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Eric<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"> Farhad Zadeh <zadeh@northwestern.edu><br>
<b>Sent:</b> Tuesday, August 26, 2025 8:18 AM<br>
<b>To:</b> Eric Greisen <egreisen@nrao.edu><br>
<b>Cc:</b> daip <daip@nrao.edu><br>
<b>Subject:</b> Re: Fwd: UVfits {External}</span> <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:11.0pt">Hi Eric, </span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt">I hope all is well with you. I have not bugged you for a long time. I still use aips. I like the way you included FPA in DFTPL, which is very useful.
</span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt">One other useful plot that many people use and model is a plot showing Q vs U which generally creates clockwise or counterclockwise patterns.
</span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt">Is it possible to consider this it in DFTPL? Perhaps you have a different task for this.
</span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt">Many thanks. </span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt">Cheers,</span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt">Farhad</span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="xmsonormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
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<p class="xmsonormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">egreisen <egreisen@nrao.edu><br>
<b>Date: </b>Monday, March 8, 2021 at 4:40</span><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black"> </span><span style="font-size:12.0pt;color:black">PM<br>
<b>To: </b>Farhad Yusef-Zadeh <zadeh@northwestern.edu><br>
<b>Cc: </b>daip@nrao.edu <daip@nrao.edu><br>
<b>Subject: </b>Re: Fwd: UVfits</span><o:p></o:p></p>
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<p class="xmsonormal"><span style="font-size:11.0pt">On 2021-03-08 15:23, Farhad Zadeh wrote:<br>
> Hi Eric,<br>
> <br>
> Here are the IMH files for the FITLD and UVLOD that Joe created. He <br>
> is really not known if there's a header-type file he could get<br>
> from the CASA data. He thinks the best bet would be the PRTTP file<br>
> that he sent yesterday since that contains all of the header<br>
> information anyway.<br>
<br>
The issue is whether CASA applies flags and calibration when doing <br>
exportuvfits. The BUNIT keyword suggests that it does not. AIPS will <br>
not be able to process these data correctly unless they are calibrated <br>
either by CASA or by AIPS.<br>
<br>
Eric</span><o:p></o:p></p>
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