Print Page - 1st draft of M74

Title: 1st draft of M74
Post by: Rocket Pooch on Sep 20, 2004, 21:42:00

I had a go at M74 but I haven't spent much time processing it, I will do this week, but here's the draft.

(http://www.jumpers4goalposts.org.uk/images/Astronomy/Messier/m74.bmp)

Title: 1st draft of M74
Post by: Rick on Sep 20, 2004, 22:51:00

Did you mean to link to a .bmp file?

Title: 1st draft of M74
Post by: Mike on Sep 21, 2004, 00:37:00

What are those wiggly things? Astro-worms??!!

Title: 1st draft of M74
Post by: Rocket Pooch on Sep 21, 2004, 00:48:00

yes worms caused by the hot pixel and lack of dark and flats :smile:

Title: 1st draft of M74
Post by: Mike on Sep 21, 2004, 05:02:00

I'm confused - how would that make things that look like worms?

Title: 1st draft of M74
Post by: Rocket Pooch on Sep 21, 2004, 06:30:00

Because there's 80 of them connected together and there showing the PE of the mount, the reason why they go wiggly is because its in ALT/AZ config (no wedge yet). If it was a GE mount they should be in a line, well nearly.

Title: 1st draft of M74
Post by: Whitters on Sep 21, 2004, 06:54:00

Nice pic, I've got worms too! The option is either darks and flats as Chris suggested, or a soothing cream :wink:

Title: 1st draft of M74
Post by: Rocket Pooch on Sep 21, 2004, 07:33:00

Ah ha,

Interesting this, after using flats and darks it seems there's ramdon noise from the gain setting on the SAC8, So I've tried a cople of options on M33 and M74 taken at the same time, I've also included a raw frams for John, he's allways surprised at the raw images.

M33 80 8sec
(http://www.jumpers4goalposts.org.uk/images/Astronomy/Messier/m33-v2-20040919a.jpg)

M74 76 8sec
(http://www.jumpers4goalposts.org.uk/images/Astronomy/Messier/m74-20040919.jpg)

M74 1x8 sec
(http://www.jumpers4goalposts.org.uk/images/Astronomy/Messier/m74raw.jpg)

Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: Rocket Pooch on Sep 20, 2004, 21:42:00