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IceCube Neutrino Observatory
@icecubeneutrino.bsky.social
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The IceCube Neutrino Observatory is an array of optical sensors buried in Antarctic ice that detects the presence of neutrinos.

https://icecube.wisc.edu/
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icecubeneutrino.bsky.social
Our 2026 physics laureate, Francis Halzen, had a chance to chat with IceCubers from around the world!

Congratulations, Francis! 👏 🎉

#NobelPrizeInPhysics2026 #NobelLaureate #NobelPrizeWinner #award #physics
October 6, 2026 at 7:26 PM
icecubeneutrino.bsky.social
IceCube Principal Investigator and @UWMadison.bsky.social Prof. Francis Halzen has been awarded the 2026 Nobel Prize in Physics "for decisive contributions to the IceCube Neutrino Observatory and the discovery of high-energy neutrinos of astrophysical origin.” 🎉🏅

#NobelPrizeInPhysics2026
Nobel Prize in Physics 2026 Francis Halzen graphic with a headshot of Francis crossing his arms.
October 6, 2026 at 10:18 AM
icecubeneutrino.bsky.social
📍What do you do when the sun rises for the first time in six months? Play golf, of course!

Read more about week 39 at the Pole ➡️ icecube.wisc.edu/news/life-at...

📸: Camille Parisel, IceCube/NSF

#WeekAtThePole #IceCubeNeutrinoObservatory
In the snowy Antarctic, at the South Pole marker, which is surrounded by flags of different nations, people in red coats stand while one person prepares to put with a golf club. The sky glows from a newly risen sun.
October 2, 2026 at 3:25 PM
icecubeneutrino.bsky.social
🔔📜 IceCube paper submitted to ApJL!

In a joint analysis with the HAWC Collaboration, we investigated the Galactic Center and searched for coincident neutrino emission. We found no significant signal and set a new constraint on neutrino emission.

icecube.wisc.edu/news/researc...
Using IceCube and HAWC data to investigate the center of our galaxy
The center of our galaxy offers a unique window into how cosmic rays are accelerated to extremely high energies. This region contains a large amount of dense gas and potential accelerators, including…
icecube.wisc.edu
September 30, 2026 at 5:36 PM
icecubeneutrino.bsky.social
📍The sun is almost here! ☀️ Our winterovers stayed busy with detector and seasonal station activities.

Read more about week 38 at the Pole ➡️ icecube.wisc.edu/news/life-at...

📸: Alicia Fattorini, IceCube/NSF

#WeekAtThePole #IceCubeNeutrinoObservatory
Sastrugi in front of a row of flags at the South Pole.
September 24, 2026 at 5:00 PM
icecubeneutrino.bsky.social
🔔📜 IceCube paper submitted to PRL!

We searched for high-energy neutrinos in the direction of KM3NeT’s ultra-high-energy event. No evidence for neutrino emission was found in IceCube for any of the studies performed and upper limits were set.

Story ➡️ icecube.wisc.edu/news/researc...
IceCube search for the source of KM3NeT’s record-breaking event
The IceCube Neutrino Observatory and the KM3NeT Astroparticle Research with Cosmics in the Abyss (ARCA) telescope are neutrino telescopes that search for the sources of astrophysical neutrinos,…
icecube.wisc.edu
September 23, 2026 at 6:17 PM
icecubeneutrino.bsky.social
Happy National Postdoc Appreciation Week! We're proud to work with a team of truly brilliant minds.

Thank you for all of your hard work and contributions!🧑‍🔬👩‍🔬🎊

#NPAW2026
A graphic of an illustrated figure holding an optical module superimposed of an image of the IceCube Lab and the words "Happy Postdoc Appreciation Week, September 21-25."
September 23, 2026 at 1:01 PM
icecubeneutrino.bsky.social
This month's Voices of IceCube feature is Lilly Pyras, a postdoctoral researcher at @utah.edu!📣

Read the interview ➡️ icecube.wisc.edu/voices-of-ic...

#VoicesofIceCube #IceCubeNeutrinoObservatory #SouthPole
A woman with blonde hair, wearing clear-framed glasses fills the frame, smiling slightly.
September 21, 2026 at 2:01 PM
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📍Last week, on a continent far, far away, a winterover snapped a familiar looking picture...

Read more about week 37 at the Pole ➡️ icecube.wisc.edu/news/life-at...

📸: Alicia Fattorini, IceCube/NSF, Disney/Lucasfilm

#WeekAtThePole #IceCubeNeutrinoObservatory
Three large structures in the distance are silhouetted by the sunrise at the horizon line, while the rest of the snowy landscape is bathed in darkness. A still shot from Star Wars: a New Hope shows Luke Skywalker looking out at two suns setting over the desert of Tatooine, with the sky bathed in purple.
September 18, 2026 at 4:24 PM
icecubeneutrino.bsky.social
🔔📜 IceCube paper submitted to ApJL!

We looked for sources that emit lower-energy neutrinos using data taken from IceCube DeepCore. No evidence for neutrino emission was found and upper limits were set on the amount of emission from all of the sources.

Story ➡️ icecube.wisc.edu/news/researc...
Search for steady-state neutrino emission using IceCube DeepCore
Four years ago, the IceCube Neutrino Observatory announced evidence for high-energy neutrinos emanating from NGC 1068, an active galactic nucleus (AGN) with a central, supermassive black hole that…
icecube.wisc.edu
September 15, 2026 at 9:00 PM
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📍Here comes the sun!

Read more about week 36 at the Pole ➡️ icecube.wisc.edu/news/life-at...

📸: Alicia Fattorini, IceCube/NSF

#WeekAtThePole #IceCubeNeutrinoObservatory
A building with glowing orange lights sits atop a snow-covered landscape with the faint, blue glow of sunrise behind it, while the edges of the image remain dark. A building from the side sits amid the polar landscape, with the faint blue glow of sunrise lighting the sky in the distance. Smoke billows from a building covered in darkness, while behind it, a pale blue sunrise creates a sharp distinction between building and sky.
September 11, 2026 at 4:28 PM
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🔔📜 IceCube paper submitted to ApJL!

The nondetection of high-energy neutrino emission from tidal disruption events (TDEs) sets upper limits on the contribution from TDEs to the diffuse neutrino flux.

Story ➡️ icecube.wisc.edu/news/researc...
Search for neutrino emission from tidal disruption events
Ever since high-energy astrophysical neutrinos were first observed in 2013, the IceCube Neutrino Observatory at the South Pole has continued searching for their elusive sources. Thus far, IceCube has…
icecube.wisc.edu
September 9, 2026 at 1:52 PM
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📍A concert and a slowly brightening sky... Summer is coming to the South Pole!

Read more about week 35 at the Pole ➡️ icecube.wisc.edu/news/life-at...

📸: Camille Parisel, IceCube/NSF

#WeekAtThePole #IceCubeNeutrinoObservatory
Live band performing with guitars, drums and amps, bathed in multicolored laser-like dots and streaks from a long-exposure light show. Faint light glows on the horizon at the South Pole, while the rest of the sky is dark and starry, with faint auroras.
September 4, 2026 at 3:54 PM
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🔔📜 IceCube paper submitted to PRD!

The study looked at low-scale gravity scenarios using high-energy neutrinos. We did not find any evidence of such features, and limits were set on the models’ allowed parameter space.

Story ➡️ icecube.wisc.edu/news/researc...
Upper limits for the radius of the largest extra dimension in the Arkani–Hamed– Dimopoulos–Dvali model. Regions to the right of the lines are excluded at the 99% confidence levels, shown separately for normal (top) and inverted (bottom) mass ordering. The solid red lines indicate our observed limits, while the dotted red lines indicate our median expected sensitivity. The remaining lines compare with existing neutrino bounds. Credit: IceCube Collaboration
September 2, 2026 at 9:00 PM
icecubeneutrino.bsky.social
A group of IceCubers gathered for dinner last night at soraniwa CAFE & BBQ in Tendo, Japan, taking a break from a busy week at the TeVPA 2026 conference. 🍢🇯🇵

Nothing beats great food and even better company! ✨️

📸 Colton Hill

#IceCubeNeutrinoObservatory #TeVPA2026
A group of people posing outside.
September 2, 2026 at 3:42 PM
icecubeneutrino.bsky.social
Elliot Koziol is a 2nd year intern at the Physical Sciences Lab in Stoughton, Wisconsin. A current high school student, Elliot has been a lifelong IceCube enthusiast and recently won an award at the International Science and Engineering Fair for his work on the hot water drill!
September 1, 2026 at 4:13 PM
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The 2026 TeV Particle Astrophysics conference is now underway in Tendo, Japan! 🗾

This is a leading international conference focused on recent developments in astroparticle physics, where researchers can present their latest findings.

📸: Ignacio Taboada, Colton Hill

#TeVPA2026
A Japanese temple stands atop a large stone outcropping amidst a foggy, wooded background. A "welcome TeVPA 2026" sign stands in a hotel lobby.
August 31, 2026 at 5:46 PM
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🔔📜 IceCube paper submitted to PRD!

Our projected sensitivities of the recently completed IceCube Upgrade show it will achieve an order-of-magnitude improvement in sensitivity at lower energies for transient sources across short timescales.

Story ➡️ icecube.wisc.edu/news/researc...
Comparison of projected sensitivities with (red) and without (blue) the IceCube Upgrade, along with published best-fit fluxes for NGC 1068 (black) and the Galactic plane (π0 template, orange). The Galactic plane flux is spatially integrated over the entire π0 template. The sensitivity values correspond to the performance after four years of IceCube Upgrade operation. Credit: IceCube Collaboration
August 31, 2026 at 2:05 PM
icecubeneutrino.bsky.social
📍Look at all that food! For community cook day, the science group prepared lunch for the station, giving the galley staff a much-needed break. 🥦 🍗 🍚

Read about week 34 ➡️ icecube.wisc.edu/news/life-at...

📸: Alicia Fattorini, IceCube/NSF

#WeekAtThePole #IceCubeNeutrinoObservatory
Lettuce, chicken, tempeh, and rice in serving trays.
August 27, 2026 at 8:18 PM
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The U.S. National Science Foundation has renewed IceCube's operation and maintenance contract. With NSF's generous funding, collaborators will improve the detector's performance and continue to make discoveries in the years to come.

Read more ➡️ icecube.wisc.edu/news/awards/...

#NSFfunded
The IceCube Neutrino Observatory sits prominently with bright auroras lighting a starry night sky in the background.
August 25, 2026 at 9:00 PM
icecubeneutrino.bsky.social
📍The auroras were quite spectacular last week at the Pole! ✨

Read more about week 33 ➡️ icecube.wisc.edu/news/life-at...

📸: Camille Parisel, IceCube/NSF

#WeekAtThePole #IceCubeNeutrinoObservatory
Bright green aurora lights illuminate the sky, while a red glowing light illuminates the snow at the South Pole.
August 21, 2026 at 6:48 PM
icecubeneutrino.bsky.social
This month's Voices of IceCube feature is Sarah Mancina, a postdoc at Università Degli Studi di Padova!📣

Read the interview ➡️ icecube.wisc.edu/voices-of-ic...

#VoicesofIceCube #IceCubeNeutrinoObservatory #SouthPole #Neutrinos #Astrophysics #Science
Sarah Mancina smiles in front of a background of trees and setting sun.
August 18, 2026 at 3:01 PM
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📍There are tunnels at the South Pole! Can you guess where they lead? 🕵️

Read more about week 32 ➡️ icecube.wisc.edu/news/life-at...

📸: Alicia Fattorini, IceCube/NSF

#WeekAtThePole #IceCubeNeutrinoObservatory
Pipes line a sparsely lit tunnel beneath the South Pole.
August 12, 2026 at 5:57 PM
icecubeneutrino.bsky.social
🔔📜 IceCube paper submitted to PRD!

We predict that statistically significant data from the Upgrade will rule out a uniform Earth density profile in favor of the standard layered-density profile.

Story ➡️ icecube.wisc.edu/news/researc...
Comparison of the sensitivity to the Earth's mass measurement between IceCube DeepCore and the IceCube Upgrade.
August 11, 2026 at 2:26 PM
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📍It will still be some time before the South Pole sees the sun, but the moon certainly brightened things up last week! 🌙

Read more about week 31 at the Pole ➡️ icecube.wisc.edu/news/life-at...

📸: Camille Parisel, IceCube/NSF

#WeekAtThePole #IceCubeNeutrinoObservatory
A bright moon shines on the horizon at the South Pole.
August 7, 2026 at 4:14 PM