QZ Carinae Orbit of the Two Binary Pairs. (arXiv:2002.04266v1 [astro-ph.SR])

QZ Carinae Orbit of the Two Binary Pairs. (arXiv:2002.04266v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Blackford_M/0/1/0/all/0/1">Mark Blackford</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Walker_S/0/1/0/all/0/1">Stan Walker</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Budding_E/0/1/0/all/0/1">Edwin Budding</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bolt_G/0/1/0/all/0/1">Greg Bolt</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Blane_D/0/1/0/all/0/1">Dave Blane</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bohlsen_T/0/1/0/all/0/1">Terry Bohlsen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Moffat_A/0/1/0/all/0/1">Anthony Moffat</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pablo_H/0/1/0/all/0/1">Herbert Pablo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pigulski_A/0/1/0/all/0/1">Andrzej Pigulski</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Popowicz_A/0/1/0/all/0/1">Adam Popowicz</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wade_G/0/1/0/all/0/1">Gregg Wade</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zwintz_K/0/1/0/all/0/1">Konstanze Zwintz</a>

We present an updated O-C diagram of the light-time variations of the
eclipsing binary (component B) in the system QZ Carinae as it moves in the
long-period orbit around the non-eclipsing pair (component A). This includes
new Variable Stars South members’ measures from 2017 to 2019, BRITE satellite
observations in 2017 and 2018, and 100 previously unpublished measures made at
Auckland Observatory from 1974 to 1978. We conclude that QZ Carinae has not yet
completed one orbit of the two pairs since discovery in 1971. The duration of
totality of primary eclipses was measured to be 0.295 +/- 0.02 day (7.08
+/-0.48 hours), rather longer than earlier values from light curve models.
Other observational findings include the shape of primary and secondary
eclipses and small-scale short-term brightness changes.

We present an updated O-C diagram of the light-time variations of the
eclipsing binary (component B) in the system QZ Carinae as it moves in the
long-period orbit around the non-eclipsing pair (component A). This includes
new Variable Stars South members’ measures from 2017 to 2019, BRITE satellite
observations in 2017 and 2018, and 100 previously unpublished measures made at
Auckland Observatory from 1974 to 1978. We conclude that QZ Carinae has not yet
completed one orbit of the two pairs since discovery in 1971. The duration of
totality of primary eclipses was measured to be 0.295 +/- 0.02 day (7.08
+/-0.48 hours), rather longer than earlier values from light curve models.
Other observational findings include the shape of primary and secondary
eclipses and small-scale short-term brightness changes.

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