Effect of Sniper Scopes on Aim Assist Value

While perusing the planetdestiny database I found something weird about the aim assist value of snipers. Particularly the longbow synthesis.
In the image you can see that there is a range of values for aim assist (43-83), this leads me to believe that scopes affect the aim assist value. The base aim assist value is 53.

I knew there was a post on here about weapon mods.
So I checked it out and saw that it did not include change in aim assist on the sniper scopes. Only stability, range, etc.

Does anyone have insight on each scopes numerical effect on aim assist?

Update: On Eye of Sol you can see that base is 61 AA with a range of 61-71 AA. Leading me to believe that the 3 available scopes have a value of either 0 or 10 AA. I would guess, actually, that they all have 10 AA, because the tooltip on all 3 scopes indicates each affects aim assistance, like you can see in the first image above.