"Barnard's Star is "clean" (poor van de Kamp!)"

Well no....it is "Clean" of a high mass planet.

But any planet of 3 Earth masses or less at 1-AU is possible.

So - until we have better instruments one cannot assume Barnard's Star has no planetary companion.

BTW - whats with the 1989-94 "discoveries" (assumed that is what the table above implies). Pretty sure the Pulsar planets were the first ones discovered 95? 96?.