macronova
A macronova is a hypothetical type of stellar explosion that is significantly more energetic than a typical nova but less energetic than a supernova. The term "macronova" has been used in astronomical literature to describe events that fall between these two well-established classes of stellar explosions. These events are theorized to occur in specific astrophysical scenarios, such as the merger of neutron stars or white dwarfs, or the collapse of very massive stars under unusual circumstances.
The energy released during a macronova would be intermediate, meaning it would be detectable by its luminosity
While the concept of a macronova is theoretically plausible, definitive observational evidence for such an event