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A Pulsar Hunter: Tests on NP 0532

1970; Institute of Physics; Volume: 82; Linguagem: Inglês

10.1086/128943

1538-3873

Hong‐Yee Chiu, Roger Lynds, S. P. Maran,

Inertial Sensor and Navigation

Photoelectric photometiy has been employed in many attempts to discover optical counterparts for radio pulsars. The techniques generally involve a searchby means of some form of data manipulation-for a component of optical variability that is harmonically related to the radio pulsation. Although the general method has found spectacular success in the case of NP 0532 (Cocke, Disney, and Taylor 1969), it requires a reasonably accurate position for the radio pulsar for, otherwise, the photometer field aperture must be so large that the admitted sky light interferes to an undesirable extent with the sensitivity of the system to the sought-after signal. Thus, for a pulsar having only a poorly known position, direct photography may offer some advantages owing to the fact that the photographic plate is a panoramic device with the result that the interference contributed by the sky is limited approximately to the flux in a solid angle subtended by the actual recorded star image. To see that this is true, consider the photographic limiting magnitude for the Kitt Peak National Observatory 84-inch telescope