NGC 2237, Rosette Nebula, software field flatten, 12 Mar 2013 (David Dearden)

Celestial hemisphere: Northern · Constellation: Monoceros (Mon) · Contains: NGC 2237 · NGC 2238 · NGC 2239 · NGC 2246 · Rosette A · Rosette B · Rosette Nebula · The star 12 Mon

NGC 2237, Rosette Nebula, software field flatten, 12 Mar 2013, David Dearden

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NGC 2237, Rosette Nebula, software field flatten, 12 Mar 2013

Found the Rosette easily on the first try; the open cluster in it is just barely visible under my sky conditions and was in my imager after lining up with the Telrad. There is a distinctive Pleiades-like pattern right in the "hole" of the nebula. It is pretty warm tonight; the imager is at 12 °C. Guiding is pretty good, certainly better than for M42 in my last session. Unfortunately I started this image pretty late so I'm already getting down into the Spanish Fork light dome, but maybe the filter will help. I’ve applied a lens correction in StarTools to try to correct for field curvature from the ST80; I want to see how well plate solving works after doing this. (It worked fine)

Reprocessed with star average white balance in the C revision.

Date: 12 Mar 2013

Subject: NGC 2237, Rosette Nebula

Scope: ST80+Antares 0.5x telereducer

Filter: Baader Planetarium UHC-S

Mount: CG-5 (Synta motors)

Guiding: 9x50 Finder/Guider + DSI Ic + PHD 1.14.01

Camera: DSI IIc (no chiller, T = 3 °C)

Acquisition: Nebulosity 3.1.4, no dither

Exposure: 28x300 s

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

Processing: StarTools 1.3 Crop, Develop, Contrast, Sharp, Deconvolute, Wipe, Develop, Track (no noise reduction), Denoise (3 pixels), Magic:Shrink, Magic:Tighten, Life:Moderate, Lens, CS6 Astronomy Tools increase star color, AstroFrame.

Original
B
Final
C

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Status	Basic success
Started	...
Astrometry.net job	6653054
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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