English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Sco X-1 is the archetypal low mass X-ray binary (LMXB) and the brightestpersistent extra-solar X-ray source in the sky. It was included in the K2Campaign 2 field and was observed continuously for 71 days with 1 minute timeresolution. In this paper we report these results and underline the potentialof K2 for similar observations of other accreting compact binaries. Wereconfirm that Sco X-1 shows a bimodal distribution of optical "high" and "low"states and rapid transitions between them on timescales less than 3 hours (or0.15 orbits). We also find evidence that this behaviour has a typical systemictimescale of 4.8 days, which we interpret as a possible disc precession periodin the system. Finally, we confirm the complex optical vs. X-raycorrelation/anticorrelation behaviour for "high" and "low" optical statesrespectively.

K2 and MAXI observations of Sco X-1 - Evidence for disc precession?