M106, 30 Apr 2013 (David Dearden)

M106, 30 Apr 2013

M106 was fairly easy to find with the Telrad from the Big Dipper. It is visible at 1.5 sec in the guider and 1 sec in the imager; the core is quite bright. I've got the usual clouds drifting through; they always come whenever I set up my gear. The forecast is good so we'll keep going. No chiller tonight but I'm running the fan. CCD at 11.5 °C but it is supposed to get cold tonight. A bit of breeze as well. I had lots of weird guiding issues where things would track fine for a while, then abruptly take off, and this especially happened after I did a meridian flip. I think this may have been a combination of wind gusts and balance being to close to "on." After I moved my counterweight down to west-weight the mount (I know this goes against convention, but seems to be what works on my mount, probably because it is so overloaded with the AT8IN), the problem seemed to go away, but wind gusts continued throughout the session.

In the revision I used a few less subs and processed the color without messing with the hue. This got rid of the nasty gradient that was there previously.

Date: 30 Apr 2013

Subject: M106

Scope: AT8IN + High Point Scientific coma corrector

Filter: None

Mount: CG-5 (Synta motors)

Guiding: 9x50 Finder/Guider + DSI Ic + PHD 1.14.2

Camera: DSI IIc (no chiller, T = ~10 °C)

Acquisition: Nebulosity 3.1.5, no dither

Exposure: 34x300 s

Stacking: Neb 3, bad pixel map, bias included, normalize first, trans+rot align, 1.5 SD stack.

Processing: StarTools 1.3 Crop; Develop 93.74%; HDR:Reveal; Sharpen; Deconvolute: 3.0 pix; Track; Color:Bottom 1.00, Top 9.60, Sat 816%; Wipe:Color & Brightness; Develop 0.01%; De-noise; Life:Moderate. CS6+Astronomy Tools star color enhance; healing brush; space noise reduction; Gaussian blurred layer mask unsharp mask on dust lanes; less crunchy more fuzzy; AstroFrame.

Original
Final
B

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Status	Basic success
Started	...
Astrometry.net job	6982967
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