As mentioned in my last blog entry, "The Value of Darks", I was able to gather some more data on the Dragon Head, IC 1340 before clouds rolled in. All told, I added 3 more HA and OIII subs and was able to gather 3 SII subs as well. This brought the total to 9 HA subs of 10m each, 9 OIII subs of 20m each, and 3 SII subs. Getting the HA and OIII subs up to 9 a piece was good because it meant I was able to use Winsorized Sigma Clipping instead of Percentile Clipping. Unfortunately with only 3 subs of SII, I still needed to use Percentile Clipping for that Channel. Total integration time is now up to 5.5 hours.
I processed the data, this time using darks, bias, and flats for everything. I also used the Hubble Palette since I now had SII data. SII was assigned to red, Ha was assigned to green, and OIII was assigned to blue. The extra data and better calibration processing helped bring out some fainter nebulosity that was not visible in the Bi-Color image. I need to get more SII data but this is coming along quite nicely.
As before, tone mapping techniques were used.
I processed the data, this time using darks, bias, and flats for everything. I also used the Hubble Palette since I now had SII data. SII was assigned to red, Ha was assigned to green, and OIII was assigned to blue. The extra data and better calibration processing helped bring out some fainter nebulosity that was not visible in the Bi-Color image. I need to get more SII data but this is coming along quite nicely.
As before, tone mapping techniques were used.
The Dragon Head, IC 1340, in Hubble Palette, August 16th, 2014
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