XMM-NEWTONX-RAY OBSERVATION OF THE HIGH-MAGNETIC-FIELD RADIO PULSAR PSR J1734–3333

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 × 10 13 G, just below that of one anomalous X-ray pulsar. We find that the pulsar has an absorbed 0.5–2.0 keV flux of (5–15) × 10 −15 erg s -1 cm −2 and that its X-ray luminosity L X is well below its spin-down luminosity , with . 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 X and B .