2 papers
astro-ph.HE2026
Optical Discovery of New and Candidate Galactic Supernova Remnants Plus Optical Imaging of the Monogem Supernova Remnant
Robert A. Fesen, Marcel Drechsler, Bray Falls +16
We report the discovery of new and candidate Galactic supernova remnants made through over 2000 hours of H and [O III] imaging using amateur class instrumentation. These nebulae…
astro-ph.GA2025
SDSO1 is a Shocked Ghost Planetary Nebula in Front of M 31
Patrick Ogle, Mark Petersen, R. Michael Rich +12
We present new, deep narrowband imagery and discuss the nature of SDSO 1, the large [O III]-emitting nebula centered 1.5 degrees SE of M 31. We find strong evidence to support the…