I planned to image this emission nebula in H-a for three hours. Clouds conspired to limit me to 4 x 15 minutes. I software average-binned the images 2x2 in ImagesPlus. This produced an under-sampled image at 5.0 arc seconds per pixel but improved the SNR. Note that on-chip binning is normally better than post-acquisition software binning, but in the case of the low readout noise of SXV-H9 (~ 7 RMS electrons), the result was nonetheless satisfactory.
I usually bin 4x4 to take my initial centering shots. There is nothing like a factor of 16x in sensitivity to bring out faint nebulosity fast! I’ve put an example on my New Images page link below.
Image and matching SkyMap Pro 10 screen shot at
http://home.att.net/~dpersyk/new.htm
Clear skies,
Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL
New Images http://home.att.net/~dpersyk/new.htm
I usually bin 4x4 to take my initial centering shots. There is nothing like a factor of 16x in sensitivity to bring out faint nebulosity fast! I’ve put an example on my New Images page link below.
Image and matching SkyMap Pro 10 screen shot at
http://home.att.net/~dpersyk/new.htm
Clear skies,
Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL
New Images http://home.att.net/~dpersyk/new.htm
