Image of the day

Captured by
Ron Masters

Messier 87

My Account

New to Astromart?

Register an account...

Need Help?

Veil Nebula in Ha and OIII light

Started by rwodaski, 09/27/2002 01:18AM
Posted 09/27/2002 01:18AM Opening Post
Here is a quick processing of the data for the portion of the Veil I've been imaging the last two nights. I collected 3x20 minutes in H-alpha last night, and 3x20 minutes in OIII and H-beta tonight. While the H-beta was downloading, I did a quick average and combine of the Ha and OIII data, and color combined them using Ha-OIII-OIII (what I call AOO) for color. That's what I've posted here in a reduced-size version. The full size version is also worth a look:

I'm pretty darn happy with the result. I don't have flats yet (and really need them; I'm imaging into the really crappy western sky that is limiting visual mag 2.5!), so this will only get better. The above is a deliberately restrained version with respect to contrast; I like the feathery look. I also did a version that is more typical of what you see, that shows more detail but lacks the semi-transparent appearance:

What's making me the happiest is that I can finally image to my west. Using luminance and RGB filter, the west was just horrid because of the severe light pollution (I'm imaging right over Bellevue, WA, a large city with skyscrapers and all the trimmings). Narrow band really does cut through the light pollution effectively. With these long total exposures, there is some bleed-through, but it's mild and I expect flats to handle it. Even just doing gradient removal in Photoshop, the results are quite good.

Takahashi FCT-150, Finger Lakes CM-10E, Paramount ME, Custom Scientific 3nm filters.

Ron Wodaski
author of "The New CCD Astronomy"

Attached Image:

rwodaski's attachment for post 1738

Ron Wodaski
New Astronomy Press
Posted 09/27/2002 07:22AM #1
Fantastic Ron. One of the best images of a portion of the Veil I have ever seen.

Don Spencer
Posted 09/28/2002 06:08PM #2
Pretty cool, Ron. What I like about narrow-band filters is not only their ability to kill light pollution--from the moon and otherwise--but the nice improvement one sees in FWHM.

Jeff Hapeman

Jeff 8O