No processing was done to the image besides a dark subtract and
flat fielding. Of course I had to do a linear scale to back off
the intensity of M87. This was done from my backyard in San Jose.
http://www.gralak.com/Astro/M87-Jet.jpg
-Ray Gralak
> -----Original Message-----
> From: owner-sf-bay-tac@No-Spam [mailto:owner-sf-bay-tac@seds.org]On
> Behalf Of Jim & Mai Shields
> Sent: Friday, April 28, 1999 7:07 PM
> To: sf-bay-tac@No-Spam
> Subject: Imaging the M87 Jet
>
>
> Ray Gralak wrote:
>
> >I wonder if I can capture the jet from my backyard? I calculate I
> >would need 200 minutes of exposure at f/16 to get the same S/N. But
> >it looks like I won't need quite that much. Was this image taken
> >from a dark site Jim?
>
> Dave Healy took it from his observatory in a small town in southeastern
> Arizona, so: Yes, I think it's pretty dark there. You can learn more if you
> click the link from my webpage to the "Huachuca Astronomy Club." (The link
> is just below the image itself.)
>
> Jim Shields
>
>
>
>
>
