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Hi Charlotte, <br>
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Have you perhaps had a chance to consider my email?<br>
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Cheers <br>
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Aris<span id="ms-outlook-android-cursor"></span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> lofarpwg <lofarpwg-bounces@astron.nl> on behalf of Aris Karastergiou <aris.karastergiou@physics.ox.ac.uk><br>
<b>Sent:</b> Friday, October 29, 2021 10:57:24 AM<br>
<b>To:</b> Sobey, Charlotte (S&A, Kensington WA) <Charlotte.Sobey@csiro.au>; lofarpwg@astron.nl <lofarpwg@astron.nl>; Evan Keane <evan.keane@nuigalway.ie>; e.vanderwateren@science.ru.nl <e.vanderwateren@science.ru.nl><br>
<b>Subject:</b> Re: [Lofarpwg] TULIPP paper draft for final review</font>
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Hi Charlotte,</div>
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That's a nice paper. I wish I had the time and energy this past year and a half to follow this work closer, but I didn't. I was reading through it now and had a comment that you might want to consider. Simply put, I think you are comparing two different quantities
when you compare the fractional linear polarization in the images to what is traditionally published in pulsar papers. In fact, I did not see the formulas you use to determine the average L/I in these two cases, but could they be the following?</div>
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<li>In imaging, L = sqrt( Sum(Q)^2 + Sum(U)^2 ), and I is just Sum(I), where the sums are over the entire integration time.<span></span></li><li>In time domain obs, L = Sum( sqrt(Q^2+U^2) ), and I is again Sum(I). Here the sums are across pulse phase. I think this is what is traditionally published in pulsar papers.</li></ol>
<div>I have ignored the L bias correction in both cases.</div>
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<div>If so (as per the norm), then the imaging L/I is always going to be less than the timing L/I, depending in fact on the PA swing and the shape of the profile. I think this is clear in your figure 2, where in the timing data the pulsar is very highly polarized. </div>
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<div>We are currently writing up a MeerKAT paper where we are highlighting this distinction in definitions, and I have been thinking about the impact this could have in identifying pulsars in images. You may want to consider this here, and even perhaps write
a few sentences along the lines mentioned above. If somehow I have missed relevant discussion that exists in the manuscript already, please ignore the above.</div>
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<div>Cheers,</div>
<div>Aris</div>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> lofarpwg <lofarpwg-bounces@astron.nl> on behalf of Sobey, Charlotte (S&A, Kensington WA) <Charlotte.Sobey@csiro.au><br>
<b>Sent:</b> 21 October 2021 15:19<br>
<b>To:</b> lofarpwg@astron.nl <lofarpwg@astron.nl>; Evan Keane <evan.keane@nuigalway.ie>; e.vanderwateren@science.ru.nl <e.vanderwateren@science.ru.nl><br>
<b>Subject:</b> [Lofarpwg] TULIPP paper draft for final review</font>
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<p class="x_x_MsoNormal">Dear All,</p>
<p class="x_x_MsoNormal"> </p>
<p class="x_x_MsoNormal">I hope this email finds you well.</p>
<p class="x_x_MsoNormal"> </p>
<p class="x_x_MsoNormal">It is a pleasure to share the initial ‘TULIPP’ paper with the PWG.
</p>
<p class="x_x_MsoNormal">The paper title is currently “<span style="">A pulsar survey of polarized point sources from the LOFAR imaging surveys: description and initial discoveries</span>”<span style=""></span></p>
<p class="x_x_MsoNormal">It can be viewed/downloaded from google drive here:</p>
<p class="x_x_MsoNormal"><a href="http://mailsweeper.astron.nl:32224/?dmVyPTEuMDAxJiYzY2UxZWU5MDY2ZTczMWFjZT02MTdCQzU4RV8yNTYyMF81NjI5XzEmJmUyODc4MDczYzNiYmE2NT0xMjMzJiZ1cmw9aHR0cHMlM0ElMkYlMkZkcml2ZSUyRWdvb2dsZSUyRWNvbSUyRmZpbGUlMkZkJTJGMXJkZkZoOG5qY0Y0NjM5c0J0UkVQOVpOSnlXdjlrWklj">https://drive.google.com/file/d/1rdfFh8njcF4639sBtREP9ZNJyWv9kZIc</a>
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<p class="x_x_MsoNormal">Please feel free to email me with any impressions/comments before your close of business on
<b>Friday 29 October</b>. </p>
<p class="x_x_MsoNormal">I hope to submit the final version of the paper shortly afterwards.</p>
<p class="x_x_MsoNormal"> </p>
<p class="x_x_MsoNormal"><span style="color:black">Many thanks and best wishes,</span></p>
<p class="x_x_MsoNormal"><span style="color:black">Charlotte</span></p>
<p class="x_x_MsoNormal"><span style="color:black">--</span></p>
<p class="x_x_MsoNormal"><b><span style="color:#00A9CE">Dr Charlotte Sobey</span></b><span style="font-size:13.5pt; font-family:"Times New Roman",serif">
</span><span style="font-size:9.0pt; color:black">(she/her/they/them) </span><span style="font-size:13.5pt; font-family:"Times New Roman",serif"></span></p>
<p class="x_x_MsoNormal"><span style="font-size:9.0pt; color:black">Postdoctoral Fellow
</span></p>
<p class="x_x_MsoNormal"><span style="font-size:9.0pt; color:black">Space & Astronomy </span><span style="font-size:9.0pt; color:#00A9CE">|</span><span style="font-size:9.0pt; color:black"> CSIRO </span><span style="font-size:13.5pt; font-family:"Times New Roman",serif; color:black"></span></p>
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