The image data is from the Royal Astronomical Society of Canada Robotic Telescope, Sierra Remote Observatories and was taken in September and October 2019. For comparison, you can see my own
version with my smaller 9.25" vs. the 16" here , after 4.5 hrs RGB using a modified Canon T3i vs. 21 hrs Ha and OIII with an SBIG CCD camera here, and from an urban setting compared to a dark sky site shown here.
Exposures:
21 narrowband Bi-Color Ha, OIII, images of 30 minutes each, for a total of 21 hours
5 each of 3 minutes RGB, totaling 15 minutes of each color.
There were 5 flats for each set, as well as 16 bias and 20 dark frames.
Location: Sierra Remote Observatories, Auberry, California
Telescope: RCOS 16" f/8.9 (3550mm focal length)
Mount: Paramount ME
CCD Camera: SBIG STX16803 16MP (4096 x 4096)
Filters SBIG RGB; SBIG Ha (7nm), OIII (8.5nm)
I did the calibration, registration and stacking using DSS for both image sets, a crop, stretching and other image processing in Startools in BiColor and RGB for the stars. The starless image was created manually. The stars were added as a top screen layer in Photoshop.
Comments