A large but very dim target. This one has been kicking my processing butt for a few months but I think I've finally made something of the 70 hours of data. Thanks to Sakib Rasool for suggesting it as a target... maybe I did something to upset him and this was his revenge
There's a bright planetary, NGC 40, at approximately 8 o'clock that's unrelated to the SNR. CTA 1 also contains the the first ever high magnetic field pulsar to be discovered through its gamma-ray pulsations, PSR J0007+7303, but sadly it didn't appear to be visible in this image.
Captured at SRO, Apr-Dec, 2017
Objects in image:
CTA 1, NGC 40, PSR J0007+7303?
Scope: Ceravolo C300 @ f/4.9 = 1470mm FL
Mount: AP1100
Camera: FLI PL16803
Focuser: Atlas
Filters: Astrodon
Guiding: Lodestar II / Tak guide scope
Image scale: 1.26 arcsec/pixel (Drizzled to double res)
Exposures: 12x300s R, 9x300s G, 12x300s B, 64x1800s Ha, 70x1800 Oiii (69.75 hours NB)
Processing: PixInsight 1.8.5
Acquisition credit: Scott Johnson, Augusto Hernandez, John Kasianowicz, Daniele Malleo, Jose Mtanous and Rick Stevenson
Processing credit: Rick Stevenson
High res version on Astrobin:
https://www.astrobin.com/full/328713/0/