Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-09-16
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
To appear in 'Physics of Accreting Compact Binaries', the proceedings of the Kyoto conference in July 2010, 10 pages
Scientific paper
On 28 January 2010, the recurrent nova U Scorpii had its long predicted eruption; prior preparation allowed for this to become the all-time best observed nova event. The coverage included daily and hourly spectra in the X-ray, ultraviolet, optical, and infrared, plus daily and hourly photometry in the X-ray, ultraviolet, U, B, V, y, R, I, J, H, K, and middle infrared, including roughly 35,000 V-band magnitudes (an average of better than once every three minutes) throughout the entire 67 days of the eruption. This unprecedented coverage has allowed for the discovery of three new phenomena; the early fast optical flares (with no known explanation), ejecta velocities at 10,000 km/s (velocities that previously had only been seen in supernovae), and deep transient dips in optical and X-ray brightness lasting for hours (for which I point to X-ray dippers as having the same cause).
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