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

We describe a new microlensing-event alert algorithm that is tailored to theKorea Microlensing Telescope Network (KMTNet) multi-observatory system. Thealgorithm focuses on detecting "rising" events, i.e., events whose brightnessis increasing as a function of time. The algorithm proceeds in three steps. Itfirst identifies light curves with at least $N_{\rm high}$ points that are atleast $3\sigma$ above the median and that had been taken since shortly beforethe previous search for new events. It then demands that there are at least$N_{\rm high}$ $\textit{consecutive}$ high points when considering anycombination of light curves from one, two, or three observatories. Finally, itfits to a "rising microlensing model" consisting of a broken line, i.e., flatbefore some time $t_{\rm rise}$ and rising linearly afterward. If this fit isbetter than a flat line by $\Delta\chi^2>\Delta\chi^2_{\rm thresh}$, the lightcurve is sent for human review. Here, $(N_{\rm high},\Delta\chi^2_{\rmthresh})=(5,250)$ or $(10,400)$, depending on the field cadence. For 2018,KMTNet alerts will initially be restricted to a few northern bulge fields andmay gradually extend to the full northern bulge. Further expansion of coverageis expected in 2019.

The Korea Microlensing Telescope Network (KMTNet) Alert Algorithm and Alert System