Gamma radiation from PSR B1055-52

The telescopes on the Compton Gamma Ray Observatory (CGRO) have observed PS R B1055-52 a number of times between 1991 and 1998. From these data a more detailed picture of the gamma radiation from this source has been developed , showing several characteristics that distinguish this pulsar: the light c urve is complex; there is no detectable unpulsed emission; the energy spect rum is hat, with no evidence of a sharp high-energy cutoff up to greater th an 4 GeV. Comparisons of the gamma-ray data with observations at longer wav elengths show that no two of the known gamma-ray pulsars have quite the sam e characteristics; this diversity males interpretation in terms of theoreti cal models difficult.