The
striking
case of RX J1856.5-3754
Optical excess of ~6 over the Rayleigh-Jeans tail
of the X-ray best fitting bb
(Walter & Lattimer, 2002)
No X-ray pulsations:
upper limit on the pulsed
fraction
£
3%
(Ramson et al, 2002, Drake et al, 2002)
Þ
£
1%
Burwitz et al., 2002; Trumper , Cospar meeting
d ~120-140 pc
(Kaplan et al, 2001; Walter & Lattimer, 2002)
Þ
radiation radius of only 5-6 km!
(Drake et al, 200