Limits on an optical pulsar in supernova 1987A

Details Limits on an optical pulsar in supernova 1987A Limits on an optical pulsar in supernova 1987A

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...340l..61p&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 340, May 15, 1989, p. L61-L64. Research supported by NSF and Rese

Astronomy and Astrophysics

Astrophysics

4

Light Emission, Pulsars, Pulsed Radiation, Supernova 1987A, Fourier Transformation, Light Curve, Stellar Luminosity

Scientific paper

Since March 1987 the optical flux from supernova 1987A for periodic pulsations has been sought. As of August 1988, after 38 separate observations, no pulsar has been detected. The typical upper limit placed on the pulsed fraction optical light from the supernova is 0.0002, for pulse frequencies in the range 0.03-5000 Hz. The best limit on the pulsed fraction of supernova light is 7 x 10 to the -6th, on January 22, 1988. On August 28, 1988 the faintest limit for the magnitude of the pulsar, dimmer than 20th mag is reached. These limits are based on Fourier transforms of up to 67 million points, covering a range of spindown rates.

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