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Article: <[email protected]>
From: [email protected](Nancy)
Subject: Re: The MANY FACES of Hale-Bopp - SIZE
Date: 2 Apr 1997 14:48:15 GMT
In article: <[email protected]> David Tholen writes:
> I suggest you contemplate the guest astronomers who have
> reported the following [emissions], all since 1996 November 4:
> [email protected] (Dave Tholen)
Humm, about the time the REAL comet spied by the Hubble and/or NEAT programs lined up with the paper orbit drawn to met it from the nova of 1995. Just a couple months ahead of perihelion, NOT a year and a half ahead of perihelion when you were claiming it was a comet.
In article: <[email protected]> David Tholen writes:
>> You never answered my posting on why the images posted
>> on your web site for what is supposed to be Hale-Bopp on
>> September 1 have uneven stretch between the central area
>> where Hale-Bopp is supposedly found and all the peripheral
>> stars.
>> [email protected]
>
> the stretch forces everything below a threshold to be black,
> everything above a different threshold to be white (or vice versa
> if you invert the image, which is done rather often), and scales
> everything between the two threshold values. This same
> treatment is applied to all pixels, but the treatment a particular
> pixel gets depends on its value relative to the thresholds; some
> are scaled, some are forced black, and some are forced white.
> [email protected] (Dave Tholen)
But Dave, that's my point, they DON'T get an even stretch toward white. The ones in the middle pull
together as the stretch is applied from image 1 to image 2 to image 3. The ones on the periphery likewise
pull together but DO NOT BRIGHTEN AT THE SAME RATE. It's like they're undergoing two different
stretches! I even counted pixels to show that the brightening rate and DEGREE of brightening is about 3
times as fast for the center portion. Explain THAT. I'm talking about the red, green, and blue thumbnail
images of September 1, 1995 on your web site at
http://galileo.ifa.hawaii.edu/images/hale-bopp/tholen-sep1/hb_ufo_tholen.html