Ngc 7793

[SamD (Sam)]

Originally Posted by RickS

Model for magnitude limit for an extended source? I still like to think I captured jet R4 of NGC 1097 at 27.6 mag/arcsec^2. All that data was from very dark sites...

From say 22 mag/arcsec^2 dark skies at zenith, at F/9, with 9 micron pixels, and say 14hrs on Luminance, I reckon a 27.6 jet is believable ! (As well as an awesome effort !)

On my calculations, a 27.6 mag/arcsec^2 jet should have come out on the image with a SNR of 0.8. This isn't really enough for stellar sources, but, with only moderate stretching and noise reduction, is definitely discernible for something like an extended jet.

[RickS (Rick)]

Thanks very much for the model (and kind comments) Sam. I'll dig into this some more as it is very interesting to me. Shiraz/Ray has been doing some very interesting work in this area. I'll drop him a note...

Cheers,
Rick.

[gregbradley]

That's the best 7793 I've seen Rick. Very nicely done.

Greg.

[RickS (Rick)]

Thanks, Greg!

[Andre27 (Andre)]

One of the best I have seen , well done,love those background galaxies.

[RickS (Rick)]

Thanks, Andre.

[Leonardo70 (Leonardo Orazi)]

Very Nice Rick. Love the contrast.

All the best,
Leo

[RickS (Rick)]

Thanks, Leo.

[Geoff45 (Geoff)]

Nicely done Rick. Having done this one myself I know that it's quite a difficult one to process--getting right down to the small almost pointlike central core and still getting detail in the fainter outer regions doesn't come easy.
Geoff

[RickS (Rick)]

Thanks, Geoff. It was a difficult one and I'm sure that a repro will improve it one day. Perhaps with some more/better data too.

[SimmoW (SIMON)]

How did I miss this magically deep image?! Gorgeous Rick, sets us all in our place in the universe.

[RickS (Rick)]

Thanks, Simon!