nBraje and Romani, 2002
Þ Can rotation smear out spectral features? 
CREATOR: XV Version 3.10a  Rev: 12/29/94 (PNG patch 1.2)  Quality = 100, Smoothing = 0
dE/dt from the bow shock standoff gives:

       P = 4.6 (B/108 G) ½ ms 

So a low field star with a non-magnetic atmosphere should have a ~ms period
HRC-S limits preclude sensitivity searches below   ~10 ms