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Paul, Erik -<BR>
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It would seem that you have a real "sticky wicket." The dashed circle idea has promise for display purposes only just to show "its in here somewhere"; however, for those who do Surface Brightness (SB) measurements, mag/'^2 or mag/"^2, or better yet, Surface Brightness, l/theta^2, ergs cm^-2 s^-1 deg^-2, these calculations would contain significant error. There is a whole host of NGC and IC Objects (GXs) out there that do not have observed brightnesses (mag) tabulated , much less their angular diameters (size). "It's been that kind of day."<BR>
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David H. -<BR> <BR>> Date: Sat, 21 Nov 2009 22:02:02 -0500<BR>> From: emf1123@gmail.com<BR>> To: apbeta@lists.astroplanner.net<BR>> Subject: Re: [APBeta] Galaxy position angle<BR>> <BR>> Erik Fichtner wrote:<BR>> > Paul Rodman wrote:<BR>> >> If a catalogue has a defined position angle for a galaxy then it is drawn oriented at that position angle in the FoV. If it doesn't have a position angle defined, it is shown with position angle = 0. It would seem that (a) this causes confusion, and (b) a method of indicating that a galaxy does not have a position angle defined should be introduced. <BR>> >><BR>> >> Any ideas?<BR>> > <BR>> > -1 ?<BR>> <BR>> Heh.. I just realized you meant for display. (It's been that kind of day)<BR>> <BR>> I suppose I'd expect something like a dashed circle of the size of the semimajor axis to indicate<BR>> "it's in here somewhere", as is done for nebulae.<BR>> <BR>> <BR> <br /><hr />Windows 7: I wanted simpler, now it's simpler. <a href='http://www.microsoft.com/Windows/windows-7/default.aspx?h=myidea?ocid=PID24727::T:WLMTAGL:ON:WL:en-US:WWL_WIN_myidea:112009' target='_new'>I'm a rock star.</a></body>
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