May 30th, in the night, the last 2 Antares lines have been powered on, thus bringing the total number of detection lines to 12 (*) and marking the completion of the largest undersea neutrino telescope to date.
Data taking has resumed, looking for cosmic neutrino sources.
(*) The detector comprises 13 lines in total: 12 detection lines plus one instrumentation line.
30 mai 2008 ANTARES : le détecteur au complet
Dans la nuit du 30 mai 2008, les 2 dernières lignes de l’expérience ont été mises sous tension, portant à 12 le nombre total de lignes de détection en fonctionnement, et marquant ainsi la fin de la construction du plus grand télescope sous-marin à neutrinos.
La prise de données a repris, à la recherche de sources de neutrinos cosmiques.
An event recorded a few hours only after the 2 new lines were powered on, on May 30th, 2008. The picture shows the optical modules that were fired by one downgoing event, for each of the 12 lines. The curves show the result of the reconstruction of this event, once projected on each of the line used for the fit (fast reconstruction used in the control room).
The abscissa is the time of the hit on the optical module, and the ordinate represents the altitude (zero is the sea bottom).
The various colors show the eamplitude of the hit recorder (number of photoelectrons).
Circles are hits used in the software onshore trigger, boxes are used for the reconstruction, crosses are hits that are not used.
Un événement enregistré quelques heures seulement après la mise en opération des 2 nouvelles lignes du détecteur, le 30 mai 2008. L’image montre les modules optiques qui furent touchés par l’événement descendant pour chacune des 12 lignes. Les courbes représentent le résultat de la reconstruction de cet événement, projeté sur chacune des lignes (reconstruction rapide utilisée en salle de contrôle).
Les abscisses représentent le temps du coup sur le photodétecteur et les ordonnées représentent son altitude (zéro au fond de la mer)
Les différentes couleurs précisent l’amplitude du signal reçu (nombre de photoélectrons).
Les cercles représentent les coups utilisées pour identifier la présence d’un événement, les carrés les coups utilisés par la reconstruction; Les croix sont des signaux non utilisés.
The Fermi Large Area Telescope (Fermi-LAT) has detected a diffuse emission of high-energy gamma-ray photons (up to several TeV) from the inner […]
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