Cosmology Large Angular Scale Surveyor
@classtelescope.org
Cosmology Large Angular Scale Surveyor | Measuring the Cosmic Microwave Background Polarization | Discovering when the universe first lit up | https://sites.krieger.jhu.edu/class/ | #NSFfunded
Beautiful new reflective half-wave plate being made here. The copper sheen is about a kilometer's worth of 100 µm wire. Though admittedly with the handles and the color it looks like paella 🥘!
October 14, 2025 at 1:13 PM
Beautiful new reflective half-wave plate being made here. The copper sheen is about a kilometer's worth of 100 µm wire. Though admittedly with the handles and the color it looks like paella 🥘!
🚀 Science Fair day in San Pedro de Atacama, the main local community close to the telescopes 🇨🇱🫶 The CLASS site team Deniz and Jullianna created and hosted an interactive display about the telescopes and cosmology for students and other residents! 💫
October 9, 2025 at 4:54 PM
🚀 Science Fair day in San Pedro de Atacama, the main local community close to the telescopes 🇨🇱🫶 The CLASS site team Deniz and Jullianna created and hosted an interactive display about the telescopes and cosmology for students and other residents! 💫
!!! Congratulations to Rui Shi for successfully defending her PhD thesis: "Cosmology Large Angular Scale Surveyor: From Instrumentation to Beyond the Standard Model" !!!
July 9, 2025 at 4:18 AM
!!! Congratulations to Rui Shi for successfully defending her PhD thesis: "Cosmology Large Angular Scale Surveyor: From Instrumentation to Beyond the Standard Model" !!!
🐝🐝🐝 The CLASS site team has been busy! 🐝🐝🐝 Here is a video of them assembling the new receiver, which comes together as nested layers. When operating, all layers are under vacuum, and outer layers thermally shield colder layers underneath. The innermost is at 0.05 Kelvin!
June 18, 2025 at 9:20 PM
🐝🐝🐝 The CLASS site team has been busy! 🐝🐝🐝 Here is a video of them assembling the new receiver, which comes together as nested layers. When operating, all layers are under vacuum, and outer layers thermally shield colder layers underneath. The innermost is at 0.05 Kelvin!
New detectors are installed on the new 90 GHz receiver at our Chile site! Go team!!
June 14, 2025 at 10:21 PM
New detectors are installed on the new 90 GHz receiver at our Chile site! Go team!!
The new array of 90 GHz detector modules is assembled in Chile. Ready to go into the new telescope! #NSFfunded
June 13, 2025 at 9:15 PM
The new array of 90 GHz detector modules is assembled in Chile. Ready to go into the new telescope! #NSFfunded
🎉 Just published in ApJ! Our paper on the first measurement of the reionization optical depth with ground based data! 🎉 We already have twice as much data in the can, so hopefully we'll have an updated result soon! #NSFfunded iopscience.iop.org/article/10.3...
June 11, 2025 at 5:54 PM
🎉 Just published in ApJ! Our paper on the first measurement of the reionization optical depth with ground based data! 🎉 We already have twice as much data in the can, so hopefully we'll have an updated result soon! #NSFfunded iopscience.iop.org/article/10.3...
The new 90 GHz telescope receiver has arrived at the CLASS site! 📡✨ The team pictured will now assemble and test the receiver before putting it on the telescope! #NSFfunded
June 9, 2025 at 7:31 PM
The new 90 GHz telescope receiver has arrived at the CLASS site! 📡✨ The team pictured will now assemble and test the receiver before putting it on the telescope! #NSFfunded
Good morning!
June 5, 2025 at 11:49 AM
Good morning!
Update on the deployment of the second CLASS 90 GHz telescope: the telescope has passed through the Panama Canal on its way to Chile. And a team has started working on the polarization modulator already at the site.
May 26, 2025 at 5:51 PM
Update on the deployment of the second CLASS 90 GHz telescope: the telescope has passed through the Panama Canal on its way to Chile. And a team has started working on the polarization modulator already at the site.
Bluesky at the observing site! 😎
April 24, 2025 at 7:14 PM
Bluesky at the observing site! 😎
✨Awesome progress!✨ Our high-school intern Jerome and mentor Carol Chan with Jerome's device to measure the heat 🌡️ of radiation entering the telescope receiver! Great job Jerome and Carol! 🚀 #NSFfunded!
January 31, 2025 at 3:38 PM
✨Awesome progress!✨ Our high-school intern Jerome and mentor Carol Chan with Jerome's device to measure the heat 🌡️ of radiation entering the telescope receiver! Great job Jerome and Carol! 🚀 #NSFfunded!
Our latest big result! "A Measurement of the Largest-Scale CMB E-mode Polarization with CLASS" 🚀https://arxiv.org/abs/2501.11904
January 31, 2025 at 4:18 AM
Our latest big result! "A Measurement of the Largest-Scale CMB E-mode Polarization with CLASS" 🚀https://arxiv.org/abs/2501.11904
📡 Calling all astronomical instrumentation nerds! 🤓 Just posted today: here is the final word on our big 90 GHz telescope upgrade that nearly doubled our sensitivity in this important band! 🚀 arxiv.org/abs/2411.12705 #NSFFunded
November 20, 2024 at 8:45 PM
📡 Calling all astronomical instrumentation nerds! 🤓 Just posted today: here is the final word on our big 90 GHz telescope upgrade that nearly doubled our sensitivity in this important band! 🚀 arxiv.org/abs/2411.12705 #NSFFunded