M81 in Hydrogen alpha

[malp]

With an almost full moon in the sky, and with PHD guiding now working again after a mysterious gremlin for several weeks, I decided to experiment with a galaxy, my first galaxy capture in 5 years. This is M81 from 12 subs, 6 at 600secs and 6 at 1200secs (3 hours total). Telescope is Takahashi 102 NSV fitted with tak reducer/flattener, a gerd neumann filter drawer with astronomik 12nm Ha filter, and SXVF H9 mono camera. Calibrated with Bias and Flats only in Maxim DL. Capture taken at 20.00 till 23.00, London suburbs. Still very noisy.

[ollypenrice]

Interesting! The strength and consistency of the Ha signal in the spiral arms comes as something of a surpirse - but there it is.

Olly

[Zadoq]

Pretty impressive. I didn't expect that much detail or so much coverage from a Ha filter on a galaxy.

Well done

Nico & Carly