This dataset captures the CTB-1 supernova remnant, also known as Abell 85 or the Garlic nebula, through 50.25 hours of narrowband imaging collected between April and October 2025. The data comprises 298 frames through an Antlia 3nm H-alpha filter and 305 frames through an Antlia 3nm OIII filter, all at 300-second exposures. Imaging was performed using two refractors, a TS-130 APO and a Sky-Watcher Esprit 120mm, paired with ASI294MM Pro and ZWO ASI2600MM Pro monochrome cameras on an AM5 mount. The dataset is available as a one-time purchase at approximately $24.90 under a CC BY-NC 4.0 license, permitting copying, modification and redistribution for non-commercial purposes. This substantial integration time across dual narrowband filters provides detailed emission data suitable for processing this faint supernova remnant in the constellation Cassiopeia.
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