Page 61 – IceCube

Learning from blazars, a long-term neutrino–gamma-ray partnership

Posted on January 31, 2019 by Silvia Bravo

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In a new paper by the IceCube Collaboration in partnership with scientists from the Fermi-LAT collaboration and the ASAS-SN telescopes, researchers went back to eight years of archived IceCube.

The results of this long-term search of high-energy neutrino emission from blazars confirm that this type of active galaxy cannot account for the majority of the diffuse neutrino flux seen by IceCube and that the source of most of the high-energy neutrinos is still unknown. These results have recently been submitted to Astronomy and Astrophysics. […]

Week 2 at the Pole

Posted on January 25, 2019 by Jean DeMerit

Even though the end of the summer season feels like it’s fast approaching, things have still been busy at the South Pole. Work got underway for both the new surface radio antennas and the new IceAct telescopes. […]

Week 1 at the Pole

Posted on January 18, 2019 by Jean DeMerit

There were different groups of South Pole visitors last week—some human, and some not. The nonhuman visitor came from Japan—IceCube-san, seen here on the snow outside the IceCube Lab. The other visitors were adventure travelers, who were based at a campsite not far from the station. […]

Atmospheric tau neutrino appearance in IceCube

Posted on January 17, 2019 by Silvia Bravo

The IceCube Collaboration has just performed its first measurement of tau neutrino appearance in oscillations of atmospheric muon neutrinos, which excluded the absence of tau neutrino oscillations at a significance of 3.2σ, confirming previous observations by OPERA and Super-Kamiokande. These results have just been submitted to the journal Physical Review D. […]

Week 53 at the Pole

Posted on January 11, 2019 by Jean DeMerit

Last week at the Pole started in 2018 but ended in 2019. What better way to launch into the new year than by unveiling something shiny and bright? That’s the tradition at the South Pole, with a special ceremony held each January 1 to reset the marker at the geographic South Pole. […]

Week 52 at the Pole

Posted on January 4, 2019 by Jean DeMerit

There are so many different ways to celebrate the holidays around the world, but there’s only one special event that actually takes you around the world. It’s the occasion of the annual “Race Around the World” at the South Pole—a fun run that circles around the South Pole, traversing all of the world’s time zones. […]

Week 51 at the Pole

Posted on January 2, 2019 by Jean DeMerit

The second South Pole Overland Traverse (SPOT) arrived and toured the IceCube Lab last week. Defueling the SPOT bladders can be a rough job, especially if the weather’s bad. […]

Week 50 at the Pole

Posted on December 21, 2018 by Jean DeMerit

Another action-packed week at the Pole. IceCube was relatively quiet, but some amazing sun dogs garnered folks’ attention. The station celebrated the 107th anniversary of Roald Amundsen’s arrival at the South Pole, with the station manager dressed up as Amundsen for a photo shoot at the geographic South Pole. […]

Week 49 at the Pole

Posted on December 19, 2018 by Jean DeMerit

An action-packed week with summer activities in full swing. There was lots of work in the field—digging, measuring, installing equipment. […]

IceCube and HAWC unite efforts to dissect the cosmic-ray anisotropy

Posted on December 17, 2018 by Silvia Bravo

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In an attempt to better understand the anisotropy, the IceCube Neutrino Observatory and the HAWC gamma-ray observatory have united their efforts to study cosmic-ray arrival directions in both hemispheres at the same primary energy. The goal of this combined observation was to get a nearly full-sky coverage to study the propagation of cosmic rays with median energy of 10 TeV through our local interstellar medium as well as the interactions between interstellar and heliospheric magnetic fields. Results have just been accepted for publication in The Astrophysical Journal and include measurements on how the anisotropy modulations are distributed over different angular scales. […]