Does someone maintain a list of RCB stars and RCB candidates? If not, how would I query VSX for this information?
Go to VSX and hit the 'search' box
Look for the box which says 'Variability Type'. if you can't see it, at the bottom there is an option for 'more'. Click that and you will see it.
Type in RCB and hit the 'search' button. VSX will list 99 objects.
You will need to hit MORE twice. You can put in a magnitude limit as well eg if you want RCBs that are brighter than 12 at max, then put Max mag between say 1 and 12 and this will give all RCBs that are brighter than mag 12.
Then you can save as a CSV file and import into EXCEL. The SAVE facility is near the top left.
When you put in type ie RCB if you add the % sign, you will also get things like RCB: which are suspected RCBs and you would get 120 records.