M83 in Ha

[Ric]

Hi all, heres one I took befor all the cloud settled in. It started of as a test of some different settings but actually turned out quite well in the end.

This one is a stack of 75 x 21 second images taken with the DSI II Pro using Envisage, stacked in DSS and tweaked in MaximDL.

Cheers

[Tamtarn]

Picked up some nice data there Ric with the DSI II a lift in curves will bring out some more detail

[Alchemy (Clive)]

geez thats got some detail ric. very nice....... your post says Ha ...... and only 21 secs.......incredible:thu mbsup:

[Dennis]

Hi Ric

That is a remarkably detailed and deep image of M83 for H alpha and those capture settings, very impressive indeed.

Cheers

Dennis

[theodog (Jeff)]

Good one Ric.
It seems a little dark, can more detail be seen if it was lightened up a little?
Well done.

[seeker372011 (Narayan)]

a galaxy in H alpha -well i never..I would have thought you wouldnt get much detail ..very interesting

[winensky]

This is really interesting. I took a similar series, longer exposures but equivalent stack time a couple of months ago on my DSI II pro in Luminance only. I had no where near the detail you captured in the spirals however my field stars had less of the distinctive DSI 'blotching'. I must try some Ha on a few galaxy shots. Very nicely done!

[Ric]

Originally Posted by Tamtarn

Picked up some nice data there Ric with the DSI II a lift in curves will bring out some more detail

Thanks guys, I'll have a look at the curves

Originally Posted by Alchemy

geez thats got some detail ric. very nice....... your post says Ha ...... and only 21 secs.......incredible:thu mbsup:

Thanks Clive, I'm glad you liked it.

Originally Posted by Dennis

Hi Ric

That is a remarkably detailed and deep image of M83 for H alpha and those capture settings, very impressive indeed.

Cheers

Dennis

Hi Dennis, thanks for your comments. As I was imaging in Alt/Az I have to stay below 30 seconds to avoid star trailing. I am looking forward to reimaging this one with longer exposures in polar mode and seeing what the little DSI can really do.

Originally Posted by theodog

Good one Ric.
It seems a little dark, can more detail be seen if it was lightened up a little?
Well done.

I tried to lighten it a bit more but it seemed to wash it out.

Originally Posted by winensky

This is really interesting. I took a similar series, longer exposures but equivalent stack time a couple of months ago on my DSI II pro in Luminance only. I had no where near the detail you captured in the spirals however my field stars had less of the distinctive DSI 'blotching'. I must try some Ha on a few galaxy shots. Very nicely done!

Hi winensky, I find imaging in Ha reduces the DSI blotching significantly.
Thankyou for your comments.

[Ric]

Originally Posted by seeker372011

a galaxy in H alpha -well i never..I would have thought you wouldnt get much detail ..very interesting

Hi Narayan, I have read that it is difficult to image galaxies in Ha but it didn't seem a real problem. I haven't tried fainter galaxies as I suspect their may be difficulties there with short exposures in Alt/Az as well as their surface brightness.
I think with the brighter galaxies there shouldn't be a problem.

Cheers

[jase (Jason)]

A bit of Ha galaxy work on offer...excellentae Ric! The details are plentiful for such short exposures too. Well done.

[Ric]

Many thanks Jase, I look forward to the time in the not too distant future when the Obs is completed and the wedge is permanently set up. I'll be able to image a lot deeper then.

Cheers

[Robert_T]

Looks great Ric, really brings out the knotty bits of the arms. Just out of interest can you run a couple of other filters and combine as a pseudo (narrow band) RGB colour view?

[Ric]

I'll have to give it a try Robert, not sure how it will turn out though.

Cheers

[skeltz (Rob)]

Nice detail in the galaxy,and for such short exposures,i always like HA..good stuff

[Garyh]

nice work Ric! ....all those Ha knots in the spiral arms really stand out.
You must add this to some color data..
cheers

[Ric]

Originally Posted by rpsastronomy

Nice detail in the galaxy,and for such short exposures,i always like HA..good stuff

Originally Posted by Garyh

nice work Ric! ....all those Ha knots in the spiral arms really stand out.
You must add this to some color data..
cheers

Thanks guys, next time I get a chance I shall revisit M83 and do the full narrowband and luminescence on this one. I am quite interested to see how it will turn out. Probably in the next moonless period.

Cheers