Supernova Remnant Simeis 147 on Auriga/Taurus Border

Imaged in HaRGB and Ha from Nova Scotia in fall, 2012 through a Canon EF135mm f2.0L telephoto lens and a SBIG ST-8300M camera with Astrodon 3nm Ha and RGB Series E filters

The filaments are very faint and tend to be overwhelmed in the thick starfield. The lower image shows the remnant mainly in the light of hydrogen alpha emission which de-empahsizes the foreground field stars.

Simeis 147

Data
Taking Camera SBIG ST-8300M	Nova Scotia, November, 2012, mag 6.4 - Sensor @-25C
Imaging OTA	Canon EF 135mm f2.0L
Equivalent focal length and ratio	135mm @f/2.8 and f/4.0
Mount	Losmandy G11 Gemini 2
Guiding	PHD with SBIG STi and 100mm FL f/2.8 Guidescope
16hr35min total integration time at f/4.0 and f/2.8	R 11X10'@f/2.8, G 11X10'@f/2.8, B 11X10'@f/2.8 Astrodon Series E filters	Ha 29X5'@f/2.8 and 21X5'@f/4.0, plus 6X20' at f/4.0 and 14X20" @ f/2.8 3nm Astrodon Filter-unbinned
Calibration and Stacking	Darks, Bias and Flat Frames - PinInsight
Processed	PixInsight,Adobe Photoshop CS4