Imaging telescopes or lenses: Takahashi FSQ-106 ED
Imaging cameras: Starlight Xpress SX-814 Trius Monochrome CCD
Mounts: Sky-Watcher EZ-EQ6 GT
Guiding cameras: Starlight-XPress Lodestar Autoguider
Software: Sequence Generator Pro · Photoshop CS6 · PIXINSIGHT 1.8
Filters: Astrodon L-NIR · Sloan u' · Sloan i'
Accessory: Lakeside Astro Motor Focus System · Starlight Xpress SX 'Maxi wheel' · Starlight Instruments FTF3545B-A Focuser
Dates:Feb. 6, 2018
Frames:
Astrodon L-NIR: 8x1200" bin 1x1
Astrodon L-NIR: 1x1800" bin 1x1
Astrodon L-NIR: 31x60" bin 4x4
Sloan i': 20x1200" bin 1x1
Sloan i': 4x600" bin 1x1
Sloan i': 4x600" bin 2x2
Sloan u': 18x1800" bin 1x1
Sloan u': 5x600" bin 2x2
Sloan u': 9x600" bin 4x4
Sloan u': 5x900" bin 4x4
Integration: 24.3 hours
Avg. Moon age: 21.04 days
Avg. Moon phase: 61.64%
Astrometry.net job: 1974448
RA center: 12h 16' 41"
DEC center: +69° 25' 4"
Pixel scale: 1.435 arcsec/pixel
Orientation: 359.624 degrees
Field radius: 0.585 degrees
Resolution: 2024x2124
Locations: The Hills Observatory, Manchester, United Kingdom
Data source: Backyard
I have been experimenting with an Astrodon SLOAN U filter which passes Ultraviolet in the 320-385 nm wavelength. Long exposures are needed as well as lots of them as the amount of UV from Deepsky objects is rather low. I started with bin 4x4 images just to get some data to see what was there, but that meant I had a low resolution image. So further images at bin 2x2 were taken then even more at 1x1 to get more detail.
I have put this image together as a bi-colour image to highlight the UV against the Near Infrared to give the greatest contrast.
UV is given more from new stars, so this image is highlighting the areas in the galaxy where there is new star formation.
All the i’ and NIR-L subs were combined together and the resulting two images UV and NIR were made into a bi-colour image in PI with PixelMath;
Red = NIR
Green = (NIR*0.4)+(UV*0.6)
Blue = UV*1.1
I also have a full colour version of this galaxy here.
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