South Pole Telescope
A 10-meter diameter sub-mm wavelength telescope observing the cosmic microwave background from the South Pole, Antarctica.
- Congrats to former SPT winterover Aman Chokshi for being recognized as one of Nature's top photos of 2025 for "scientific fieldwork"! www.nature.com/immersive/d4...
- SPT getting ready for observations last week. Weather has been great recently and entering the best part of the observing season. The #aurora are also picking up, with the #Sun still near solar maxima. Picture by SPT winterover Karia last week. #southpole @NSF @doescience
- Been clear skies and great observing weather the past week at the #southpole. SPT winterover Karia Dibert was able to get to a visit this nice picture at the RF communications dome, showing some impressive #aurora! @NSF @doescience
- New SPT-3G B-mode spectrum and r-constraint! "demonstrates a white noise level of 9.3 (6.7) µK-arcmin at ℓ∼500 for the 95GHz (150GHz) data, with a 1/ℓ noise knee at ℓ= 128 (182) with a statistical uncertainty on r of σ(r) = 0.067" arxiv.org/abs/2505.02827 @NSF @doescience
- New joint SPT, ACT, & Planck CMB lensing power spectrum & cosmology results! The CMB measurements are consistent, when combined place new leading constraints on cosmic structure, the Hubble constant, and the neutrino mass! @NSF @doescience #southpole arxiv.org/abs/2504.20038
- Now that we are past Sunset at the #southpole, and its actually dark in the Dark Sector, our winterovers Sim and Karia decided to stage an epic #starwars light saber battle in front of the South Pole Telescope! #NSF
- More #aurora lighting up the sky at the #southpole, again captured by SPT winterover Sim Bash! Technically we are still in nautical twilight, but we should still be in solar maximum this year, so should be a great winter for aurora! @noaa.gov @NSF.gov #NSF
- First aurora of the 2025 winter season! Picture by SPT winterover Sim Bash! @noaa.gov #NSFfunded
- Picture by @noaa.gov winterover Ian Crocker, of a drifting sastrugi wave, with the #sunset behind the ceremonial #southpole and the profile of the SPT and dark sector telescopes in the distance on the right.
- Two-weeks after #Sunset, the sky is getting darker at the #southpole. Pic of SPT winterover Karia Dibert by Sim Bash, outside doing the greasing of the SPT elevation gears of the telescope, that they still need to do every two weeks, even during the depths of winter. @NSF
- Picture of SPT winterover Karia Dibert cleaning the snow off the cabin roof of the telescope, a few days after #equinox #sunset at the South Pole! #Antarctica @NSF
- Unfortunately it was pretty cloud during #Sunset this year at the South Pole, but our winterover Sim managed to catch this picture just before the weather got bad, with the moon over SPT! #southpole #Antarctica
- SPT 2026 Winterover job advertisement is now live on the AAS Job Register! Circulate to any astronomer or physicist or engineer friends to whom 1-year in Antarctica might sound particularly appealing right now! aas.org/jobregister/...
- New @TheNRAO press release describing @almaobs measurements of SPT-discovered protocluster SPT2349-56, work led by SPT scientist Dazhi Zhou from U. of British Columbias! Hidden Cosmic Fuel Tank Found in Infant Galaxy Cluster public.nrao.edu/news/hidden-...
- We are looking for SPT 2026 winter overs — please encourage candidates to apply at the link below and to contact us directly. #Antarctica #southpole @NSF 2026 South Pole Telescope (SPT) position: uchicago.wd5.myworkdayjobs.com/External/job...
- Picture by SPT winterover Sim Bash, showing the sun shining behind SPT, taken near end of February! #sunset is only a couple weeks away, and the sun is about 4-degrees above the horizon. @NSF #Antarctica
- Nice aerial view of SPT and the Dark Sector Lab, from @BICEP_Keck scientist Matthew Petroff!
- Im guessing we will be closer to midnight
- About 20-days until the last flight of the Austral summer and start of winter operations. One last SPT team picture before people started leaving, pictured here: Adam, Amy, Jessica, Matt, Sim, Karia, Maclean, Pernic, and Sasha! #southpole #Antarctica
- Final SPTpol TE, EE power spectrum from full 4-year data set! "dataset is well-fit by the ΛCDM model, for which we find H0=70.48±2.16 km/s/Mpc and Ωm=0.271±0.026 using only the SPTpol data" Great PhD thesis work from Jody Chou! #southpole @NSF arxiv.org/abs/2501.06890
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