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The ROSAT X-ray source 1RXS J141256.0+792204 has recently been identified asa likely compact object whose properties suggest it could be a very nearbyradio millisecond pulsar at d = 80 - 260pc. We investigated this hypothesis bysearching for radio pulsations using the Westerbork Synthesis Radio Telescope.We observed 1RXS J141256.0+792204 at 385 and 1380MHz, recording at high timeand frequency resolution in order to maintain sensitivity to millisecondpulsations. These data were searched both for dispersed single pulses and usingFourier techniques sensitive to constant and orbitally modulated periodicities.No radio pulsations were detected in these observations, resulting in pulsedradio luminosity limits of L_400 ~ 0.3 (d/250pc)^2 mJy kpc^2 and L_1400 ~ 0.03(d/250pc)^2 mJy kpc^2 at 400 and 1400MHz respectively. The lack of detectableradio pulsations from 1RXS J141256.0+792204 brings into question itsidentification as a nearby radio pulsar, though, because the pulsar could bebeamed away from us, this hypothesis cannot be strictly ruled out.

A Strong Upper Limit on the Pulsed Radio Luminosity of the Compact Object 1RXS J141256.0+792204