lukepower Posted December 12, 2014 Report Share Posted December 12, 2014 NGC 2174 (also known as Monkey Head Nebula) is an H II[1] emission nebula located in the constellation Orion and is associated with the open star cluster NGC 2175.[1] It is thought to be located about 6,400 light-years away from Earth. This is a narrowband image, sum of 60 minutes exposures in Ha7, O3 and S2. Yeah I know, more data, but I wanted to try ... This is actually my first narrowband image, I am not satisfied with the colors and had some severe RBI issues with the images... Need to work on that... Link to comment Share on other sites More sharing options...
lukepower Posted December 21, 2014 Author Report Share Posted December 21, 2014 Okay, I went through all those images again, this time using FLI's RBI flooding in the camera. I had severe ghost images in my raw images, so I had to re-take them with RBI mitigation. Of course, I had to take new appropriate darks with the same exposure time. Also, I am now calibrating the flats with a "normal" method (scaled darks with no RBI flashing). The results are definitively improving, especially the oh-so uneven background (caused partially by RBI) is now better Link to comment Share on other sites More sharing options...
rbrecher Posted December 25, 2014 Report Share Posted December 25, 2014 Yes, I agree new results are better. Link to comment Share on other sites More sharing options...
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