M100 (Plus ID'ing fainter objects?)

[Macavity]

Don't hold the front page? Mostly experiments in scaling dark

frames and dealing with gradients! But M100 and friends...

It seems quite hard (for me! lol) to find data on fainter objects. 

There seem to be a lot of catalogues...  mostly of images? 

So, I was wondering:

Can I find online data on e.g. PGC40214 - magnitude, SB etc.

(Such things seem something of a hot topic of late here!) 

Hey, who let that WHITE STRIPE in... 

[f15p5]

Hi Chris,

Really like these deep shots, find it interesting how deep  small scopes can image. I find it hard to get good info on small faint objects where you don't know what it is you are seeing.

Richard

[Grogfish]

SkySafari Pro might be worth a shout, as it appears to claim galaxies down to mag 18 - though it's £30 to find out!

Nice pics BTW- using the Watec? I do like the negative in particular as it does seem easier to see detail on the deep stuff.

[f15p5]

How do you get the white negative?

[Macavity]

Yes, it's a Watec image. Though (naturally) the result of stacked frames!

After much procrastination, I am finally trying to "get my act together" re.

such things - A Website (Wordpress blog) and a Flikr is coming soon...

Mostly, I have to say, to aid a limited memory of what I DID re. exposures

and post processing. But I do intend to "document" current methods. 

Hmmm... Most graphics programs will furnish you with a Negative image?

I'm too "mean" to rent / buy Photoshop, so I use the GIMP program.

Under the "Colors" menu , there is an "Invert" option...

[Paul73]

Here are the relevant screen shots from Sky Safari Pro. Looks like you got PGC 40045 as well (mag 15.9 & roughly 1')!

Paul

[Macavity]

Thanks for that Paul.

I do actually have a (somewhat abbreviated) version of Sky Safari on my Phone... 

I'll have to check the possibilities of various databases for the various programs!

I suppose 16th magnitude is nothing special, but I claim the surface brightness is

certainly less than that. Not good seeing and I clobbered it in the processing?

Aside: Now that I've found something to do gradient subtraction (I figured out how

to use the IRIS software) a whole new world beckons. Hope springs eternal...