Re: [APML] question on HorseHead shot

[Robert Reeves <reeves10@swbell.net>]

> http://www.koyote.com/users/bobm/horseheadBRC.htm
> This shot is pretty deep and the question I have concerns the nebulosity
on
> the right side of the image. I don't see this on most shots of this
region,
> but there are hints of it on one of my images. Is this nebulosity really
> here or has it been overly enhanced (even created?) from differential
> reciprocity failure of the green and blue layers of the E200 out at the
edge
> of the frame caused by light fall-off and vignetting? I often get some of

Bobby,

Its real.  It is on a 20-year old TP shot of the region I did with my
Schmidt.  Look at
http://www.robertreeves.com/horsbig.jpg and there are dim nebulae where you
refer to.  Sorry this is a compressed jpg and the detail isn't the greatest,
but it shows the faint nebulocity to the right.

Robert Reeves                      reeves10@swbell.net
520 Rittiman Rd.                   www.robertreeves.com
San Antonio, Texas 78209    210-828-9036
USA                                     29.484  98.440  200 meters


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