<font face="Verdana, Arial, Helvetica" size="2">Eric Greisen updated #15417<br />
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<div style="margin-left: 40px;">Staff (Owner): Eric Greisen (was: -- Unassigned --)</div>
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Regarding the ZAMAN task<br />
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<div style="margin-left: 40px;">Ticket ID: 15417</div>
<div style="margin-left: 40px;">URL: <a href="https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/15417">https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/15417</a></div>
<div style="margin-left: 40px;">Name: Atanu Koley</div>
<div style="margin-left: 40px;">Email address: <a href="mailto:atanuphysics15@gmail.com">atanuphysics15@gmail.com</a></div>
<div style="margin-left: 40px;">Creator: User</div>
<div style="margin-left: 40px;">Department: AIPS Data Reduction</div>
<div style="margin-left: 40px;">Staff (Owner): Eric Greisen</div>
<div style="margin-left: 40px;">Type: Issue</div>
<div style="margin-left: 40px;">Status: Open</div>
<div style="margin-left: 40px;">Priority: Default</div>
<div style="margin-left: 40px;">SLA: NRAO E2E</div>
<div style="margin-left: 40px;">Template group: Default</div>
<div style="margin-left: 40px;">Created: 12 January 2020 12:33 PM</div>
<div style="margin-left: 40px;">Updated: 13 January 2020 11:33 AM</div>
<div style="margin-left: 40px;">Reply due: 14 January 2020 05:00 PM (1d 5h 27m)</div>
<div style="margin-left: 40px;">Resolution due: 07 October 2022 05:00 PM (998d 5h 27m)</div>
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<p>The task ZAMAN is meant to work with AGAUS for deep absorption line</p>
<p>images. Similarly, ZEMAN works with XGAUS for emission and weaker absorption</p>
<p>line experiments. You run XGAUS or AGAUS first to fit Gaussians to the</p>
<p>components of The Ipol image and then run ZEMAN or ZAMAN giving it the</p>
<p>Ipol Gaussian model. In this way, the Zeeman fitting works on the 2 components</p>
<p>properly, dealing with an S-curve merging that might occur. It has been found to</p>
<p>work well - finding splittings of merged components that had been measured by</p>
<p>traditional means with higher-spatial resolution images. It sometime reveals that</p>
<p>one of the components is Zeeman split while the other is not (at the current S/N).</p>
<p>You really should study AIPS Memos 118 and 122 before trying these tasks.</p>
<p>They are available from the web <a href="http://www.aips.nrao.edu">www.aips.nrao.edu</a>.</p>
<p>Eric Greisen</p>
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