Horsehead Nebula (B33) in Hydrogen Alpha
This is 8h10m of exposures on the Horsehead nebula gathered from three different sessions in the Fall of 2011 and 2014 respectively. This image consists of 2h50m of ten minute exposures taken at -25*C in December 2011, and 5h20m of twenty minute exposures gathered in November and December 2014. The images were captured with a QSI 583c, through a Televue 127is guided on a Paramount ME. The 2011 data utilized a 12nm Hydrogen Alpha filter, while the 2014 data was captured at a more precise 3nm width. Both data sets were calibrated with bias, dark, and flat frames.
If you look at this image you will see the distinctive 'horsehead' dark nebula in the centre, and the flame nebula off to the far left near the O star Alnitak. This is a fairly deep image, and the 'raying' effect seen in this region above the horsehead. This is quite a dusty region, and below the nebula you will see subtle shifts in illumination. I am hoping that the addition of some full spectrum data will bring out more detail in these regions.