Superhumps and post-outburst rebrightening episodes in the AM CVn star SDSS J012940.05+384210.4

Superhumps and post-outburst rebrightening episodes in the AM CVn star SDSS J012940.05+384210.4

We report unfiltered photometry of the first confirmed outburst of the AM CVn system SDSS J0I2940.05+3842I0.4 during 2009 December. At its brightest the star was magnitude 14.5, 5.4 magnitudes above mean quiescence. Although the first part of the outburst was not observed, six remarkable rebrighteni...

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Veröffentlicht in:Journal of the British Astronomical Association 2012-02, Vol.122 (1), p.49
Hauptverfasser: Shears, Jeremy, Brady, Steve, Koff, Robert, Goff, William, Boyd, David
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Astronomical research
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Stars, Variable
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creator Shears, Jeremy
Brady, Steve
Koff, Robert
Goff, William
Boyd, David
description We report unfiltered photometry of the first confirmed outburst of the AM CVn system SDSS J0I2940.05+3842I0.4 during 2009 December. At its brightest the star was magnitude 14.5, 5.4 magnitudes above mean quiescence. Although the first part of the outburst was not observed, six remarkable rebrightening events were observed during the course of the outburst. Forty-one days after the outburst was detected, the star was still 1.7 magnitudes above quiescence. Superhumps were observed during the outburst with a peak-to-peak amplitude of 0.06 mag and Psh = 37.9(2) min. We also used archival data to show that another AM CVn system, SDSS JI24058.03-015919.2, has also undergone at least one outburst, with an amplitude of ~4.6 magnitudes.
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subjects Astronomical research
Methods
Observations
Photometry
Stars, Variable
title Superhumps and post-outburst rebrightening episodes in the AM CVn star SDSS J012940.05+384210.4
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