In summary, the conversation is about an amateur astronomer who was working on imaging the M101 Pinwheel Galaxy and was hoping to discover a supernova. They were experimenting with their equipment and had some issues with color balance and exposures. The astronomer realized that they may have unknowingly captured the supernova in their photos. The conversation also mentions a clip of a single subframe taken with a different scope showing the supernova. The topic of measuring the light curve is also brought up. The conversation ends with a reference to an amateur astronomer who unknowingly captured a rare supernova and a link to an article about it.
Holy cow, I've been working on imaging that galaxy while experimenting with my equipment. Weather didn't cooperate last night, bit I was planning to try again tonight. Discovering a supernova would be awesome, but I'm not sure I would notice, lol.
On second thought, there's a decent chance I would have noticed. One of the issues I was working on/experimenting with is color balance/exposures. My result is below (similar orientation as the discovery photo), which has some weird color artifacts in overexposed stars. Since I was working on that and since I shot different colors on different days, I likely would have noticed an oddly colored star, showing up in red and green but not blue, for example.
And here's a clip of a single subframe I just took with a different scope, with the supernova still visible/circled: