NGC 5128 good seeing, new RA gear

kinetic (Steve) · #1 25-02-2011, 01:42 AM

A quick 20 sec set with the DSI II cooling on tonight.
No PEC, no guiding. Worm gear Mk II

edit: 2nd image: some deconvolve and better levels/curves to
suit my LCD screen.

Steve

renormalised (Carl) · #2 25-02-2011, 12:35 PM

Nice shot for 20sec, Steve

jjjnettie (Jeanette) · #3 25-02-2011, 12:52 PM

Nice. Where's Omega Centauri?

strongmanmike (Michael) · #4 25-02-2011, 06:05 PM

Ok Steve, big bad Mike here...if it was good seeing, then that looks out of focus

Love you still

Mike

Bassnut (Fred) · #5 25-02-2011, 06:45 PM

And you can tell what about PE in 20 secs?.

Cool pic for 20secs BTW.

kinetic (Steve) · #6 25-02-2011, 07:08 PM

Quote:

Originally Posted by strongmanmike

Ok Steve, big bad Mike here...if it was good seeing, then that looks out of focus

Love you still

Mike

Quote:

Originally Posted by Bassnut

And you can tell what about PE in 20 secs?.

Cool pic for 20secs BTW.

Riiiiight! OK thanks guys...cheers.

gregbradley · #7 25-02-2011, 07:35 PM

You picked up a lot of detail for only 20 seconds. Nice round stars at very high mag does show promise.

Greg.

kinetic (Steve) · #8 26-02-2011, 11:12 AM

Thank you Greg, Carl, J,

Nettie the Omega Cent set was blown out by cloud just after
we chatted...this set was started after midnight.

Fred, Mike, : 20sec subs x 65 frames whatever that turns out to be
in total exposure time.
PE curve is generated by the align file in Nebulosity (as long as I
do no manual guiding adjustments).
As this represents about 4 turns of the worm it is a workable PE
measurment.
This set was done from teeth 65 to 70 on the worm gear.
PE was measured at +/- 6 arc sec at 1.14 arc sec per pixel.

Steve

strongmanmike (Michael) · #9 26-02-2011, 03:31 PM

Hi Steve

I wasn't questioning your PE, I just think the photo looks a little out of focus, that's all. It's close but given you said it was good seeing, a 12" 1500mm FL Newt should give better res than that, that's all.

A good test is that there is a faint double star just to the right of the main dust lane that should be at least indetifiable as a double (figure 8 shapped) if you have good resolution and clearly seperated if you have excellent resolution (Like say, when using an AO device on a longer FL 12.5" RC in good seeing).

The love refered to was a man love of course

Mike

kinetic (Steve) · #10 26-02-2011, 06:09 PM

Mike,
as usual, I owe you an apology because...damnit! you are right yet
again

The set isn't as good as my best result.
That was way back in Feb 2009 when I didn't use cooling on the DSI
and I didn't have the better PE gear made

I simply had better focus, more frames and better seeing.
That set was 219 fr x 5 sec = 18mins exposure.
This set was 34 fr x 20 sec = 11 mins exposure. (I was incorrect earlier
stating 65fr)

When I throw my better deconvolve routine and 1.6x resample routine at
the older set I get this (below)
And wouldn't you know it....you even suggested the same thing to
me two years ago about resolution.
http://www.iceinspace.com.au/forum/s...51&postcount=7
Sorry Mike....ya big teddy bear

(hugs)

Steve

Quote:

Originally Posted by strongmanmike

Hi Steve

I wasn't questioning your PE, I just think the photo looks a little out of focus, that's all. It's close but given you said it was good seeing, a 12" 1500mm FL Newt should give better res than that, that's all.

A good test is that there is a faint double star just to the right of the main dust lane that should be at least indetifiable as a double (figure 8 shapped) if you have good resolution and clearly seperated if you have excellent resolution (Like say, when using an AO device on a longer FL 12.5" RC in good seeing).

The love refered to was a man love of course

Mike

RobF (Rob) · #11 26-02-2011, 08:44 PM

Quote:

Originally Posted by strongmanmike

Hi Steve

I wasn't questioning your PE, I just think the photo looks a little out of focus, that's all. It's close but given you said it was good seeing, a 12" 1500mm FL Newt should give better res than that, that's all.

A good test is that there is a faint double star just to the right of the main dust lane that should be at least indetifiable as a double (figure 8 shapped) if you have good resolution and clearly seperated if you have excellent resolution (Like say, when using an AO device on a longer FL 12.5" RC in good seeing).

The love refered to was a man love of course

Mike

LOL - sounds like someone who has spent a LOT of time looking at Cent A subs!!!

Great work on the image Steve, even if is ever so slightly off. Was this taken using the worm/gear set you fabricated?

strongmanmike (Michael) · #12 27-02-2011, 10:57 PM

Quote:

Originally Posted by RobF

LOL - sounds like someone who has spent a LOT of time looking at Cent A subs!!!

......what ever could you mean

strongmanmike (Michael) · #13 27-02-2011, 11:00 PM

Quote:

Mike,...damnit! you are right yet again

Of course I am

Quote:

When I throw my better deconvolve routine and 1.6x resample routine at
the older set I get this (below)
And wouldn't you know it

See?!

Quote:

....you even suggested the same thing to
me two years ago about resolution.
http://www.iceinspace.com.au/forum/s...51&postcount=7

oh well you eventually got it

Quote:

Sorry Mike....ya big teddy bear

(hugs)

Steve

Right back at ya fella

Mike