News – Page 76

IceCube confirms the astrophysical nature of high-energy neutrinos with an independent search in the Northern Hemisphere

Posted on August 20, 2015 by Staff

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Today, the IceCube Collaboration announces a new observation of high-energy neutrinos that originated beyond our solar system. This study, which looked for neutrinos coming from the Northern Hemisphere, confirms their cosmic origin as well as the presence of extragalactic neutrinos and the intensity of the neutrino rate. The first evidence for astrophysical neutrinos was announced by the collaboration in November 2013. The results published now in ”Physical Review Letters” are the first independent confirmation of this discovery. […]

Week 31 at the Pole

Posted on August 13, 2015 by Jean DeMerit

It’s still dark at the South Pole, with sunrise not for a while yet. So don’t be confused—that was the moon, not the sun, setting behind the South Pole Telescope. Once it had set, some bright and lively green auroras took over the sky. […]

Week 30 at the Pole

Posted on August 6, 2015 by Jean DeMerit

Last week at the Pole they had Christmas in July. Since the seasons in the Southern Hemisphere are the reverse of the Northern Hemisphere, many southern locales celebrate in July or August so that they can have a wintry feel to their festivities. The South Pole station had a tree, presents, and plenty of sweets on hand for theirs. […]

IceCube at ICRC 2015

Posted on August 4, 2015 by Megan Madsen

The IceCube Collaboration has a strong presence at the 34th International Cosmic Ray Conference (ICRC 2015) with over 50 presentations and posters. ICRC started on July 30 and runs through August 6 in The Hague, Netherlands. […]

AMON, the Astrophysical Multimessenger Observatory Network

Posted on July 31, 2015 by Staff

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The Astrophysical Multimessenger Observatory Network (AMON) will link existing and future high-energy astrophysical observatories into a single virtual system, enabling near real-time coincidence searches for multimessenger astrophysical transients and their electromagnetic counterparts and providing alerts to follow-up observatories. […]

Week 29 at the Pole

Posted on July 30, 2015 by Jean DeMerit

You might not know you’re at the South Pole from the photo of this watermelon. But there it is, growing in the greenhouse at the station, only a little bigger than a tennis ball at the moment. With it’s supportive, handmade hammock, hopefully it will reach a nice size and ripeness for the crew to enjoy. […]

Week 28 at the Pole

Posted on July 24, 2015 by Jean DeMerit

It’s dark at the Pole, and even a headlamp’s light only goes so far. Paths to outlying buildings are lined with flags before winter arrives, when there’s still sufficient light for the installation. On a moonless winter night, though, there’s no question that the flag line has a value much greater than the sum of its parts. It’s a real lifesaver. […]

Week 27 at the Pole

Posted on July 17, 2015 by Jean DeMerit

They’re watching something—but what? This is the communications (or “Comms”) office at the South Pole station. Not normally the site for recreational activities, but last week it played host to participants in an international darts tournament among the Antarctic stations. […]

A combined analysis of the astrophysical neutrino flux in IceCube

Posted on July 16, 2015 by Silvia Bravo

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The IceCube Collaboration is now revisiting these results in a combined analysis accepted for publication in The Astrophysical Journal. The analysis is based on the results of six individual studies and uses up to three observables—energy, zenith angle and event topology—to derive improved constraints on the energy spectrum and the composition of neutrino flavors of the astrophysical neutrino flux. […]

2015 GNN Dissertation Prize awarded to van Santen and Yáñez

Posted on July 15, 2015 by Staff

Jakob van Santen, a former graduate student working on IceCube at the Wisconsin IceCube Particle Astrophysics Center (WIPAC) and currently a postdoc at DESY (Deutsches Elektronen-Synchrotron) in Zeuthen, and Juan Pablo Yáñez, also working on IceCube at DESY in Zeuthen, were recently awarded a Dissertation Prize from the Global Neutrino Network. This is the first year that the GNN Dissertation Prize has been awarded. It recognizes young postdoctoral candidates who have written an outstanding thesis and contributed significantly to their projects. […]