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Dark Energy

Credit: X-ray: NASA/CXC/M.Markevitch et al.
Optical: NASA/STScI; Magellan/U.Arizona/D.Clowe et al.
Lensing Map: NASA/STScI; ESO WFI; Magellan/U.Arizona/D.Clowe et al.

About 90% of the Universe is dark—we can't see it except through its gravitational pull. Although this was suspected more than 60 years ago, we are just now in a position to explore the dark matter in large areas of the Universe through a technique called weak gravitational lensing.

Dark Matter - in depth

Illustration of strong gravitaional lensing.

Learn More about Formal Education

What makes Rubin Observatory EPO’s formal education program valuable for teachers?

  • Investigations only require accessing a webpage. No special software is needed.
  • Investigations will be available in English and Spanish.
  • User-friendly data exploration tools within the investigations eliminate the need to download data and export it to other programs.

Learn

In its first month of operation, the LSST will see more of the Universe than all previous telescopes combined. Its rapid-fire, 3-billion pixel digital camera will open a movie-like window on objects that change or move; its superb images will enable mapping the cosmos in 3D as never before. Surveying the entire sky every few days, LSST will provide data in real time to both astronomers and the public. For the first time, everyone can directly participate in our journey of cosmic discovery.

Survey Images

The image below, which comes from a pilot project called the Deep Lens Survey (DLS), gives a taste of what the sky will look like with LSST. This image covers the area of the full moon, or half a degree. The DLS images are deep, showing roughly ten times as many galaxies per unit area than the Sloan Digital Sky Survey (SDSS), but the LSST data will actually go deeper still. LSST will also have better resolution than the SDSS as it has been designed from the ground up to minimize blurring, unlike many of today's telescopes.

Technical Details

Focal Plane Requirements

  • High QE to 1000nm
  • Thick silicon (> 100 µm)
  • PSF << 0.7 arcseconds
    • High internal field in the sensor
    • High resistivity silicon substrate (> 5 kohm/cm)
    • High applied voltages (40 - 50 Volts)
    • Small pixel size (0.2 arcseconds = 10 µm)
  • Fast f/1.2 focal ratio
    • Sensor flatness < 5µm p-v
    • Package with piston, tip, tilt adj.

Detector Design - Rafts and Towers

The charge-coupled device (CCD) sensors that make up the LSST Camera's focal plane are mounted on 21 platforms called rafts, with each raft comprising a 3x3 square of sensors, for a total of 189 CCDs. Each CCD is built up of 4096 horizontal and 4097 vertical (4K x 4K) imaging elements, and has 16 outputs, adding up to a total of 144 channels per raft and 3024 channels across the entire focal plane array.

LSST Camera Focal Plane

The LSST Camera's focal plane is the area across which light from the telescope's mirrors, further corrected by the telescope's lenses, comes to a focus. As such the focal plane is the heart of the camera, responsible for capturing the light from billions of distant galaxies in a form that can be preserved.

Petascale R&D Challenges

Achieving scalability and reliability in Rubin Observatory computing, storage, and network resources

The design of the data management system (DMS) architecture is influenced by the technology that we expect to be available to implement it, starting with construction and commissioning and continuing through the principal 10-year survey period. This technology includes not only more powerful components, but completely new system architectures and potentially disruptive technologies. 

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Financial support for Rubin Observatory comes from the National Science Foundation (NSF) through Cooperative Agreement No. 1258333, the Department of Energy (DOE) Office of Science under Contract No. DE-AC02-76SF00515, and private funding raised by the LSST Corporation. The NSF-funded Rubin Observatory Project Office for construction was established as an operating center under management of the Association of Universities for Research in Astronomy (AURA).  The DOE-funded effort to build the Rubin Observatory LSST Camera (LSSTCam) is managed by the SLAC National Accelerator Laboratory (SLAC).
The National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 to promote the progress of science. NSF supports basic research and people to create knowledge that transforms the future.
NSF and DOE will continue to support Rubin Observatory in its Operations phase. They will also provide support for scientific research with LSST data.   




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