Narrowband M31

[Kai]

Tonight i tried out a new narrowband filter (Baader 7nm Hydrogen Alpha) that i got from FLO.

Conditions were not that good with what seemed like a high fog hanging in the air and toward the end of the 25 90 second subs alot of dew was forming.

I used the ED80 with a 0.5 Focal Reducer on the Atik 16.

(click to enlarge)

[jonifive]

I had the same problem with dew and there seemed to be a sort of fuzzy mist to the air!

I tried M31 and it was no where near as good as yours, it was very faint and bright orange because of the LP!!!

Nice pic BTW.

JV

[Ant]

Very Nice Steve, what purpose is the narrow band? I thought that narrow band filters were mostly used on nebulae.

You have some nice dust lanes coming through and I think that you have a cracking image from our Light polluted skies!

M31 is so HARD...

Ant

[Kai]

Very Nice Steve, what purpose is the narrow band? I thought that narrow band filters were mostly used on nebulae.

Owww i dont know Ant !!!

I got the filter to do the Horsehead later on this year and as the conditions were not all that i thought i would have a play to see what happens.I suppose it has cut out a lot of the Lp being only 7nm.

I suppose i could get another narrowband dataset and combine in a false colour image

[lunator]

Steve

The narrowband has given M31 a slightly different shape to the usual image.

It a very goo pic and you were just testing...

Cheers

ian

[shifter]

I like that Steve, I must put one of those filters on my Christmas wish list hehe

.....Brian.....

[MartinB]

Steve, the narrow band will certainly get rid of your LP but it will also take out 93% of the light from M31 Ha works best on emission nebulae when most of the light is exactly in the Ha band. Nearly all the light from the neb is grabbed but only a very small amount of moonlight/LP etc. An Ha layer is often added to galaxy images to help pick out the Ha regions within the galaxy.

[CELESCOPE]

Ah Yes , have to agree ther with Martin Steve , throw that Ha in the box , and pull out that CLS filter, lob that in and you will see the dust lanes appear on a 25 sec download, ,

Rog

[SteveL]

That reminds me Steve, you still after a 1.25" CLS filter?

[Kai]

. An Ha layer is often added to galaxy images to help pick out the Ha regions within the galaxy.

I thought i would grab the Ha layer first ( did i dig myself out of that )

[MartinB]

. An Ha layer is often added to galaxy images to help pick out the Ha regions within the galaxy.

I thought i would grab the Ha layer first ( did i dig myself out of that )

Makes sense to me!

[Kai]

Phew

Tonight i think i will capture some other random data