M82, Cigar Galaxy, UHC-S, 17 Feb 2015 (David Dearden)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: Bode's nebulae · Cigar galaxy · M 82 · NGC 3034

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M82, Cigar Galaxy, UHC-S, 17 Feb 2015

Since I was already in the neighborhood the night before (imaging M81), I decided to try and get a better image of M82 by using similar tactics. Began by synching on α UMa with a PicGoto slew to the target; it was in the field of view. Used the UHC-S filter because I'm looking north toward the Provo light dome, and used 600-sec subframes again to try and go as deep as possible. Started imaging, refocused a couple of times, and took a nap, with an alarm set for transit time. Got up and did the meridian flip and refocused, then went to bed.

Date: 17 Feb 2015

Subject: M82, Cigar Galaxy

Scope: Astrotech AT8IN+High Point Scientific Coma Corrector

Filter: Baader UHC-S

Mount: CG-5 (Synta motors, PicGoto Simplificado)

Guiding: 9x50 Finder/Guider + DSI Ic + PHD 2.4.1 (Win 7 ASCOM)

Camera: DSI IIc no cooling (about 0 °C)

Acquisition: Nebulosity 3.3.2, no dither

Exposure: 43x600 s

Stacking: Neb 3.3.2, bad pixel map, bias included, 33 flats, histogram match, deBayer & square, trans+rot align, 40-60% median combine.

Processing: StarTools 1.3.5.289 Crop; Wipe; Develop 87.49%; HDR:Reveal core; Color: Scientific, 230%; Deconvolute 2.5 pix; Life:Moderate; Track 4.0 pix; Magic: 1 pix. Photoshop CC 2014 + Carboni Astronomy Tools Deep space noise reduction; Increase star color; Layer masked unsharp mask for dust lane enhancement; Astroframe.

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Status	Advanced success
Started	...
Astrometry.net job	551931
PixInsight job	KFTALN9AI37GPD9DPBNZVNXUXRJ7IOWA
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	09h55m40s.46
RA (top/left)	09h58m13s.54
RA (top/right)	09h58m36s.90
RA (bottom/right)	09h53m01s.29
RA (bottom/left)	09h52m48s.59

Dec (center)	+69°41′00″.1
Dec (top/left)	+69°21′37″.1
Dec (top/right)	+69°59′27″.4
Dec (bottom/right)	+70°00′31″.4
Dec (bottom/left)	+69°22′20″.3

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M82, Cigar Galaxy, UHC-S, 17 Feb 2015

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M82, Cigar Galaxy, UHC-S, 17 Feb 2015

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