@@ -28,9 +28,8 @@ Because neutrinos travel with nearly the speed of the light, a real-time or near
### KM3NeT Multi-Messenger Neutrino Alerts
KM3NeT is a multi-purpose cubic-kilometer neutrino observatory currently being deployed at the bottom of the Mediterranean Sea. The detector is 3D arrays of light sensors called digital optical modules (DOMs), each DOM consist of 31 photomultiplier tubes (PMTs) that can register light signals. KM3NeT detects neutrinos via the Cherenkov technique: neutrinos have weak interactions in the seawater and produce secondary particles that emit Cherenkov light while traveling in the seawater with a speed larger than the light phase speed in seawater. So even though neutrinos are not directly observed, the spatial and temporal distributions of the light and the amount of light observed by the DOMs can be used to reconstruct the incoming neutrinos' direction and energy.
With the Southern sky including the Galactic Center in view and a great angular resolution, KM3NeT will contribute greatly to the multi-messenger community. For a detailed description of the detector, see [the detector page](Detector.md).
KM3NeT consists of two detectors: ORCA (Oscillation Research with Cosmics in the Abyss) and ARCA (Astroparticle Research with Cosmics in the Abyss). ARCA's 3D arrays will instrument 1 Gton of seawater, with the primary goal of detecting cosmic neutrinos with energies between several tens of GeV and PeV. Due to its position in the Northern Hemisphere, ARCA will provide an optimal view of the Southern sky including the Galactic Center. ORCA arrays are denser and its volume is smaller ( ~ few Mtons), optimized for the detection of atmospheric neutrinos in the 1 - 100 GeV. KM3NeT can also study low-energy neutrino astronomy, such as the MeV-scale core-collapse supernova, where each KM3NeT DOM acts as also as a detector.
* For the search of neutrinos via event reconstructions based on (causally coincident) lit-up DOMs, focusing on high energy neutrinos, such as astrophysical neutrinos, KM3NeT will be able to send/receive alerts from/to the multi-messenger community:
