A search for thermal extreme ultraviolet radiation from nearby pulsars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Far Ultraviolet Radiation, Neutron Stars, Pulsars, Spaceborne Astronomy, Thermal Radiation, Apollo Soyuz Test Project, Radio Astronomy, Spaceborne Telescopes

Scientific paper

Results are presented for extreme ultraviolet (100-1000 A) observations of radio pulsars. Using an EUV telescope carried aboard the Apollo-Soyuz mission, data were acquired on the nearby pulsars PSR 1133 + 16, 1451 - 68, and 1929 + 10. None of the objects was detected, with typical upper limits of 6 by 10 to the -26th power erg/sq cm/sec per Hz in the 170-620-A band set on flux incident at earth. The data are interpreted to set limits on the effective temperatures of the neutron stars, yielding values of less than 160,000 K in the best cases, and the limits compared with theoretical predictions.

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