Search for the optical signatures of a pulsar in SN 1987 A

Details Search for the optical signatures of a pulsar in SN 1987 A Search for the optical signatures of a pulsar in SN 1987 A

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...237l...9o&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 237, no. 2, Oct. 1990, p. L9-L12.

Astronomy and Astrophysics

Astrophysics

8

Emission Spectra, Optical Properties, Pulsars, Supernova 1987A, Astronomical Photometry, Binary Stars, Fast Fourier Transformations, Stellar Luminosity, Stellar Models, Supernova Remnants

Scientific paper

Pulsed optical emission from the putative pulsar in SN 1987A has been searched for during the interval March 1988 to April 1990, using various ESO telescopes and a fast photometer. In none of the FFT outputs of individual nights has outstanding power in excess of the expected tail of the noise distribution been found. The lowest 2 sigma upper limits reached in March and April 1990 correspond to about 3, 4, and 10 microJy for frequencies above 0.1 Hz up to 50, 500, and 5000 Hz respectively. These limits imply that the pulsar either emits less optical power than the Crab pulsar and the 50-msec pulsar PSR 0540 - 69 in the LMC, or it has an unfavorable disposition. Combination of the power outputs of different nights further decrease these upper limits by about 0.3 magnitudes.

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