Here’s my latest image of the IC1311 region in Cygnus.
This is a first light image with my new ASI6200MM that was intended more as a test, but evolved into a new project. I started this project with a QHY16200A on the same scope, and wanted more data with this, but in the end liked the wider field so much more that I went with this data. This is all taken in one night, and due to poor planning on my part (I didn’t expect the data to be that clean), I only have 3 Ha and 4 SII exposures. The OIII in this region is pretty faint, so that’s why I concentrated on that to get the noise down. I still have some spacing issues to resolve, which should be done when my new adapter comes in. In comparing the OIII channel from this camera, and the QHY16200A, it was a night and day difference.
It seems gain=100 will be a good test to do as well. Early indications show a lot of improvement at gain=100 vs. gain=0 for narrowband with only a minor impact on dynamic range. This was taken with Gain=0, Offset=0, but I had previously built my bias/dark library with offset=50. I had to get creative with the dark subtraction, but honestly this sensor is so clean I probably didn’t have to do that.
Each sub is about 120MB, so it takes quite a bit longer to process on my computer, but the end result is well worth the wait.
Details:
Scope: Astro-Physics 92mm Stowaway @f/5.3
Reducer: Astro-Physics 0.8x telecompressor
Camera: ASI6200MM Pro
Guide Camera: ASI174MM Mini
Mount: Mach1 GTO
Ha: 3x15min
SII: 4x15min
OIII: 11x15min
Software: Voyager, PHD2, APCC, Pixinsight
4.5 hrs total exposure
Astrobin link:
https://astrob.in/full/a0opb8/0/
Starless version:
https://astrob.in/full/a0opb8/B/