(the following information provided by Dr. Pierre Chayer)
Jules Halpern, Chris Martin, and Herman Marshall obtained a light curve of the 5.75 millisecond pulsar J0437-4715 using the Deep Survey instrument on the EUVE satellite.
This is the first EUVE observation to make use of the full 0.5 millisecond time resolution of the spacecraft clock in WSZ mode. The single-peaked pulse profile contains approx 4200 photons, and is the result of correcting the photon arrival times from the satellite to the solar system barycenter, as well as from the pulsar to the center of mass of its 5.74 day binary orbit. It is not yet established whether the observed emission (from this or any recycled pulsar) is non-thermal from the magnetosphere, or surface thermal emission from a hot polar cap.
A combined analysis of the EUVE and ROSAT data, to appear in The Astrophysical Journal, is used to place limits on the temperature and surface area of thermally emitting regions that might be present.
Figure 1