Mostly this is a note to myself to remind me to track this down, but if DetChar has a chance to jump in and help identify where this is coming from, that would be great.

Flipping through the summary pages, it looks like we have historically had a bit of noise show up in DARM as a broad lump around 480 Hz (it's in light red on the summary pages, so it's there sometimes but not constantly).  However, the last 2 days look like it's there much more consistently.  I feel like this is something that we had found and resolved a few months ago, but we need to look into it again with the new IFO alignment.