Using observations made with the XMM-Newton Observatory , we report the probable X-ray detection of the high-magnetic-field radio pulsar PSR J1734–3333 .
This pulsar has an inferred surface dipole magnetic field of B = 5.2 \times 10 ^ { 13 } \mathrm { G } , just below that of one anomalous X-ray pulsar ( AXP ) .
We find that the pulsar has an absorbed 0.5–2.0 keV flux of \left ( 5 \textrm { - - } 15 \right ) \times 10 ^ { -15 } \mathrm { erg s ^ { -1 } cm ^ { -2 } } and that its X-ray luminosity L _ { \mathrm { X } } is well below its spin down luminosity \dot { E } , with L _ { \mathrm { X } } < 0.1 \dot { E } .
No pulsations were detected in these data although our derived upper limit is unconstraining .
Like most of the other high- B pulsars , PSR J1734–3333 is X-ray faint with no sign of magnetar activity .
We tabulate the properties of this and all other known high- B radio pulsars with measured thermal X-ray luminosities or luminosity upper limits , and speculate on a possible correlation between L _ { \mathrm { X } } and B .