LBN 576 aka CTB1 - Supernova Remanant in Cassiopeia - RBG enhanced with Ha and OIII

Here's just the H-Alpha data:




LBN 576 aka CTB1 - Supernova Remnant in Cassiopeia
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From Wikipedia https://en.wikipedia.org/wiki/CTB_1

CTB 1, also known as G116.9+00.1 and AJG 110, is a supernova remnant located in the constellation Cassiopeia. It was discovered as a radio source in 1960 in a study of galactic radiation carried out at a frequency of 960 MHz.
Morphology: CTB 1 is an oxygen-rich supernova remnant of mixed morphology, that is, in the radio band it is similar to a hollow shell while in X-rays its structure is compact and centralized. Thus, it shows a complete envelope in both the visible spectrum and the radio band. The radio emission is brightest along the western edge, with a prominent gap existing along the northern and northeastern sectors. The uniform envelope—in both wavelength ranges—indicates that the shock wave extends in a relatively homogeneous interstellar medium.
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Camera: Apogee U16M (16803 ccd) w Astrodon Gen II LRGB filters
Scope: Planewave 12.5" CDK
Mount: SB Paramount ME
Guiding: SBIG ST402ME / Astrodon MMOAG
10/9/8 x 10min each for RGB
41 x 20min H-Alpha; 10x20min OIII
Lucknow, Ontario, Canada
July 2024
Images captured with TheSkyX
Session orchestrated by CCD-Commander
Calibration and processing of the RGB and Ha and OIII in PixInsight as follows:
RGB: SPCC, BlurX, NoiseX, Gradient, Curves, HistogramTransform
Ha and OIII: BlurX, NoiseX, StarX, Curves and HT and LHE x 2 on the starless component, stars back in via PixelMath

Photoshop processing:
Split channels: Added the Ha to Red at 100% and Blue at 20% using Lighten Blend mode. Added OIII to Green and Blue using Lighten at 33%
Small tweaks and small noise reduction then Save-for-Web

Click on the images to see it enlarged.

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