Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...263..823s&link_type=abstract
Astrophysical Journal, Part 1, vol. 263, Dec. 15, 1982, p. 823-827. Research supported by the Abramson Foundation.
Astronomy and Astrophysics
Astronomy
3
Heao 1, Light Curve, Pulsars, Spaceborne Astronomy, X Ray Sources, Neutron Stars, Statistical Analysis, Stellar Magnetic Fields, Stellar Rotation
Scientific paper
On November 18 and 19, 1977, the large area detector on the HEAO satellite pointed for 96 minutes toward one direction. At that time the 5-ms mode was employed, and 5-ms data accumulations were transmitted. Some 753,000 data points were epoch-folded to search for periods between 10 ms and 100 ms, and one period showed a very low expectation for random occurrences. This point was persistent for a long enough time to permit the epoch-folding of a large body of data, its precise determination to 0.1 microsec, and the sighting of its light curve. All the tests performed indicate the existence of a pulsar in this place. The period of this pulsar is 67.5492 ms, corrected for heliocentric coordinates (its local period is 67.55328 ms). Its expectation for random occurrence is lower than 5 x 10 to the -9th.
Livio Mario
Sadeh Dror
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