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SVOM section updated #40

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46 changes: 27 additions & 19 deletions VOHE-Note.tex
Original file line number Diff line number Diff line change
Expand Up @@ -355,26 +355,34 @@ \subsubsection{SVOM}
is a Sino-French mission dedicated
to the study of the transient \gls{HE} sky, and in particular to the detection, localisation and
study of Gamma Ray Bursts (GRBs).
Gamma-ray bursts are sudden, intense flashes of X-ray and gamma-ray light.
They are associated with the cataclysmic formation of black holes, either by the merger of two compact stars
(neutron star or black hole) or by the sudden explosion of a massive star, twenty to one hundred times the mass of our Sun.
The birth of a black hole is accompanied by the ejection of jets of matter that reach speeds close to the speed of light.
These jets of matter then decelerate in the circumstellar medium, sweeping away everything in their path.
Gamma-ray bursts can be observed at the very edge of the universe, acting as lighthouses that illuminate
the dark ages of its creation. Although they have been studied extensively over the past fifteen years,
gamma-ray bursts are still poorly understood phenomena. To better understand them, China and France have decided
to join forces with the \gls{SVOM} satellite, which is specifically dedicated to the study of gamma-ray bursts.

The special feature of the \gls{SVOM} mission is that it combines ground-based and space-based observations,
providing a spectral bandwidth from the visible to the \gls{HE} range. By guaranteeing multi-wavelength
observations of about one hundred bursts of all types per year, the \gls{SVOM} mission will make a unique contribution
to two of the most fruitful areas of research in recent decades: the use of bursts in cosmology and the understanding
of the phenomenon. Looking further ahead, the \gls{SVOM} mission will work in close synergy with a new generation of
instruments dedicated to the search for neutrinos and gravitational waves of cosmic origin, in order to confirm
the astrophysical origin of the signals detected by these future instruments.

\gls{SVOM} has been successfully launched on June 22 2024 from Xichang lauchpad.

providing a spectral bandwidth from the visible to the \gls{HE} range.

The \gls{SVOM} spacecraft carries four multi-wavelength instruments: ECLAIRs(4-250keV),
GRM (15-5000 keV), MXT (0.3 - 10 keV) and VT (optical Blue and Red broadband filters).
ECLAIRs and GRM can detect gamma-ray transient sources in real-time with localisation
capabilities for ECLAIRs. An autonomous slew of the platform can be requested (only by
ECLAIRs) to perform X-ray and optical follow-up of the source with the smaller field
of view instruments: MXT and VT.
\gls{SVOM} also transfers alerts data of potential GRBs detection in near real-time to the ground
with a typical latency of less than 30 seconds.
The most valuable information (e.g. localisation, SNR, energy range and more) are then
automatically shared to the world-wide community within the form of Notices.
They will be broadcasted to the worldwide community using the NASA's General Coordinates
Network (GCN) system both in VOEvent and in JSON format. Public access to
the dedicated Kafka streams are planned to be opened at the beginning of 2025.

All data related to GRB detections will be public and can be
retrieved through the \gls{SVOM} portal (not deployed at the time of writing).
All these science products, in FITS format, do conform to a global data model based on JSON descriptors.
Pipeline modules are able to extend the data products they deliver with a list of
keywords that carry most of the Obscore quantities. This feature will facilitate
their publication in ObsTAP services.

\gls{SVOM} has been successfully launched on June 22 2024 from Xichang lauchpad.
As early as the commissionning phase, it has detected numerous
interesting GRBs and triggered follow-up campaigns with very different facilities such
as SWIFT, Einstein Probe or even the VLT.

\subsection{KM3Net and neutrino detection}

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