Attached is a LCG showing two nice curves for V838 Mon, one visual, the other CCD. Both show good consistency in the overall trend (slightly downward over time) but offset by about a full magnitude!
I do realize that for objects such as ths one, extremely colored with emission lines, it can cause skewed results in different passbands.
Nevertheless, a full magnitude difference in two passbands which are supposed to be fairly close to each other by design is troubling.
Which should be considered more correct for this object, the visual or the V. Mainly in respect to reporting in general how bright this object is in this general passband ?