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HST revisits the proper motion of PSR B0656+14 1

By R. P. Mignani, Karl Schwarzschild Str, Do Garching B. Munchen, A. De Luca, P. A. Caraveo Ifc-cnr, Via Bassini and I- Milan


We report the first successful measurement (with HST/WFPC2) of a significant proper motion for a mV ∼ 25 object which we had proposed as the optical counterpart of the radio pulsar PSR B0656+14. The yearly displacement of 43±2 mas is highly significant and, while in agreement with early, rougher, radio measurements, stands out for its vastly improved accuracy. Together with the report of a possible optical pulsation (Shearer et al. 1998), we regard this result as the final proof of the optical identification of PSR B0656+14. Subject headings: Astrometry — pulsars: individual (PSR B0656+14) 1

Year: 2000
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