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Old 21-07-2010, 12:44 AM
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Octane (Humayun)
IIS Member #671

Octane is offline
 
Join Date: Dec 2005
Location: Canberra
Posts: 11,159
Nothing flashy; another test exposure through less than ideal conditions: NGC 6188

Hi all,

My second ever CCD image.

On Saturday night I headed out to John's place out at Cootamundra for some dark skies (thanks, again, John).

I set up a lot quicker this time, and spent my time drift aligning, all good.

The goal was to devote the night in 10-minute sub-exposures to this region, through Hα and OIII to do a HαOIIIHαOIII blend mapped to LRGB.

However, the weather had other ideas. I ended up managing to get just one hour of data, all shot through increasing fog. The halos around some of the brighter stars are a testament to this.

Target: NGC 6188 and NGC 6200 down the bottom
Scope: Takahashi FSQ-106N
Camera: SBIG STL-11000M (operating at -40 degrees; no sweat)
Mount: Losmandy G-11
Exposure: 6x600 seconds, self guided through a 12nm Astronomik hydrogen alpha filter. The only calibration I've done is subtract dark frames. I didn't bother with making flats as I didn't think anything would eventuate from the session.

Captured through CCDSoft and processed entirely in IRIS, with salt and pepper added in Photoshop CS4.

The image is here.

Bash away.

H
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