Cg4 (ngc 2427)

[gregbradley]

Here is my version of CG4.

Taken a couple of weeks ago at my dark site using the Tak BRC 250 and
Apogee U16M camera.

Good seeing.

LRGB 105 45 45 30

A hard object to process as it is again another dim object. I processed this one from scratch about 3 times.

http://www.pbase.com/gregbradley/image/108067018

Greg.

[astroron]

I get lots of square stars and pixles.
Are you sure that is Ngc 2427?

[gregbradley]

Hi Ron,

I am not sure what you mean. It is a largish image -2mb.
The BRC does give diffraction spikes on brighter stars. They can look
a bit squarish. Like an ASA Newtonian scope that way. I don't mind them myself.

Not sure what you mean about pixels.

Yes you are right, NGC 2427 is one of the galaxies in the image not another designation for CG4.

Greg.

[spearo]

Cool dont get to see that target very often!
frank

[astroron]

Greg,My screen only shows the top half of the picture clear and the and the bottom all pixleated or all unresolved.
It is probably my computer as Spearo can see the image OK.
It Seems the original image is to big?
The image comes comes out alright in the large format.

[multiweb]

Wow. Very cool ... :eyepop: Love the dark cloud (v shape). Deep shot. There's a couple of galaxies fully resolved around too. Top work. :thumbsup:

[gregbradley]

Hi Ron,

I was wondering if I should compress the image a bit more. I reduced the image size to 1200 by 1200 like I normally do yet the image was still over 2mb.

These large chip cameras have large image files. A 1x1 binned subexposure is 32.8mb. I can only process 4 or 5 subexposures at a time before I get memory warnings in CCDstack.

Greg.

[gregbradley]

Thanks Marc.

I was happy about the depth as well. I had to drop out one of the blue subexposures as it was taken at about 4:20am and thats when dawn starts and the image had too much daylight in it.

In summer the usable imaging time seems to be about 9:45pm to 4:30am at the latest or less than 7 hours.

Greg.

[astroron]

Thanks Greg, I am not an astroimager, so don't understand much about the intracasies of digital imaging.
You do a good job anyway.
Cheers

[beren]

:thumbsup: another beauty Greg congrats

[Octane]

Greg,

Awesome.

Regards,
Humayun

[KenGee]

Looks good Greg, I get the feeling though your going to play with this one. To me the data looks good, but the colours look a little forced. It could be you often see this coloured greener.
That Tak is a bute.