Dumbbell Nebula in O-III

[riklaunim]

SCT 8, reduktor f/6.3, Castell O-III, DSI III Pro - bin 2, guiding: Radial Guider/DMK/PHD and lame mount alignment :D
CCD temperature: 27C, darks, no flats :)

16 x 60 sec + 3 x 120 sec:
http://www.rkastrofoto.appspot.com/site_media/astro/orig/m27-01.07.2010/hantle-16-1m-3-2m.jpg

16 x 60 sec:
http://www.rkastrofoto.appspot.com/site_media/astro/orig/m27-01.07.2010/hantle-16-1m.jpg

40 x 15 sec:
http://www.rkastrofoto.appspot.com/site_media/astro/orig/m27-01.07.2010/hantle-40-15s.jpg

[jase]

Great work riklaunim. You've done very well to capture such detail with an OIII narrowband filter for such short exposures. The OIII jet is impressive.

The Dumbell nebula has such an interesting OIII characteristic which is vastly different to the other emission lines. Fascinated by this, I did a roll over image some time ago comparing Ha and OIII data I had acquired which can be seen here (http://cosmicphotos.com/reprocessed/M27HaOIII.php).

Thanks for sharing your efforts. Will you also be adding some SII and HA data?

[JD2439975]

Great capture for such short exposure times, nicely done riklaunim.

Now Mr Jennings, talk about stealing another mans thunder but I must say that's some very nice data you have there.
Have you thought of adding some SII to it?
Would look wicked in a Hubble palette I reckon.

[riklaunim]

Currently I have only cheap Castell O-III (which looks like Astronomik O-III clone). I'll probably try RGB with Baader UHC-S stacked in the weekend if the guiding won't loose stars and wind buffets won't attack the scope ;)

DSI III has ICX285, which is very sensitiv CCD, comparable or better than kodaks in cheaper SBIGs etc. ;) Bin 2 so 4 pixels merged to 1. Gain was about 87%... and working at 27C :D


Did someone tried helium narrowband imaging? ;) It has emission lines in blue and yellow (so 0% LP required),

[riklaunim]

Stack on two starts to remove the slight rotation:
http://www.rkastrofoto.appspot.com/site_media/astro/orig/m27-01.07.2010/hantle-16-1m-3-2m-2p.jpg


And 2x bigger version made by drizzle stacking :)
http://www.rkastrofoto.appspot.com/site_media/astro/orig/m27-01.07.2010/hantle-16-1m-3-2m-drizzle.jpg