η Carinae: variability in a new light.

Details η Carinae: variability in a new light. η Carinae: variability in a new light.

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc...25c&link_type=abstract

International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 25 - 26

Astronomy and Astrophysics

Astrophysics

1

X-Ray Light Curves: Variables, Peculiar Stars: X Rays, Circumstellar Shells: X Rays

Scientific paper

ROSAT Position Sensitive Proportional Counter (PSPC) observations for the first time unequivocally reveal the presence of a compact source of hard X-ray emission centered on the peculiar star η Car. These observations also show a dramatic change in the hard-band (≥1.6 keV) counting rate by a factor of ≡2 in a 4-month interval. ROSAT High Resolution Imager (HRI) observations which span the PSPC observations also reveal a variable source of X-ray emission centered on η Car. Thus strong variability which is a characteristic of η Car in radio through IR and visible-band wavelengths is also observed at X-ray energies. The authors examine the X-ray lightcurve of η Car using available Einstein, ROSAT and ASCA data.

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