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quote:Originally posted by nemesis
I saw the U. of Iowa website photo, Joe. An arrow to specify Barbarossa may be helpful.
Thanks for taking a look, and for posting your comment! The median-stacked U. of Iowa image which I sent to Bob Turner, and which he posted here, is better than the unstacked photo on the U. of Iowa website. Barbarossa's image on the U. of I. website photo is, at best, a statistical pixel density, and not impressive to see.
Though the stacked image file had built-in coordinates, it might not be convenient, to put arrows near the positions of Barbarossa & Frey; arrows might cover important details. One can put an Aladin (through VizieR) photo in another window, and use it to find coordinates. Better, if you like I can email you the file: you can download a free FITS viewer quickly from the NRAO, and I can help with those details via private email (a FITS viewer preserves details of a FITS file which are lost in translation to other versions such as GIF). The quickest, is to follow the instructions below, to find Barbarossa & Frey on the "Liberator" processed version of the stacked U. of Iowa image, which Bob Turner posted above.
The benefit of the photo on the homepage of astro.physics.uiowa.edu, is social. When adminstrators of other government telescopes, see that the U. of Iowa pointed its telescope at "Barbarossa", they'll be more willing to point their own telescopes there. If someone says, "Ha ha, you took a photo of Barbarossa instead of the Big Bang; you lose your grants & tenure," my supporter can say, "The U. of Iowa took a photo too." My academic supporters now have "a bigger dog".
A dot, no matter how starlike, proves little unless one is satisfied that it does not appear on other photos, and that these "disappearing dots" define orbits to significant accuracy. Many wish they could resolve the issue by saying, "Oh, your dot's not very good." That never will resolve the issue. Near the limit of CCD detection, real bodies may appear fragmented or absent.
Even "not very good" dots, if enough of them conform to an orbit with enough accuracy, imply real bodies. If anyone wants to check my math and look at my dots, he may email me privately for all eight (4 Barbarossa & 4 Frey) positions and photos; so far no one has done that.