Summit Update

July 16, 2019 - This is a busy and exciting time on Cerro Pachón, as more large components of the telescope have now arrived at the summit. The LSST Primary/Tertiary (M1M3) mirror surrogate (the steel structure that will stand in for the glass mirror during testing) was transported from the port at Coquimbo to the summit in two pieces—it arrived at the LSST summit facility site on June 28th. The M1M3 mirror cell (the steel support structure for the mirror) stayed at the port in Coquimbo a few days longer, then followed the same route up the mountain, arriving on July 11. Both pieces of equipment were carried by Javier Cortez, SA transport vehicles.

Software Success

June 17, 2019 - The team working on the Auxiliary Telescope for LSST had a big reason to celebrate this week, after completing a series of exercises on Cerro Pachón that demonstrated the successful integration of the telescope's software and hardware systems. The AuxTel (as it's fondly known) is located on a hill about 100 meters (328 feet) from the main LSST telescope, and it will measure atmospheric transmission during LSST Operations.

Raise the Roof

The LSST Vertical Platform Lift Completes Load Testing on the Summit

June 4, 2019 - When it comes to moving enormous pieces of LSST equipment between floors of the summit facility building, an ordinary cargo elevator just won't do. Instead, a heavy-duty, vertical platform lift will carry the assembled mirror and camera subsystems 78-feet (23.8 meters) between the telescope and maintenance floors of the LSST observatory. The heaviest load to raise and lower will be the combined weight of the Primary Tertiary Mirror (M1M3), mirror cell, transport cart—close to 80 tons (72.5 metric tons)!

Data Rights and Funding for LSST Operations

May 22, 2019 - LSST's U.S. public funding agencies, the National Science Foundation (NSF) and the U.S. Department of Energy (DOE), have reached a final decision on the way data rights and data access will be handled during LSST Operations.

We are working with AURA, SLAC, and NSF/DOE to understand the new model and will be communicating to you in the next weeks on what this means for the project and operations teams and our LSST stakeholders. We plan to keep you closely informed.



May 11, 2019 – This morning, a unique astronomical mirror reached its new home in the Andes Mountains of Northern Chile. This incredible mirror will enable the Large Synoptic Survey Telescope (LSST) to catalog an estimated ~40 billion celestial objects—more objects than there are humans on earth. LSST will scan the entire visible sky every few nights, visiting each location approximately ~1000 times during its ten-year survey, which is scheduled to begin in 2022. With these fast, repeated observations LSST will open a new window to the changing Universe, providing countless new opportunities to do science with transient objects such as asteroids and supernovae. Additionally, with the wide field of view made possible by this mirror, LSST will advance the study of dark matter and dark energy.

Preparing for the LSST Data deluge - CC-IN2P3 Upgrades its Machine Room

Servers already installed in the new computer room

May 3, 2019 - CC-IN2P3 is one of the computing facilities that will be responsible for processing and storing data collected by LSST during Operations. The campaign to upgrade the center’s power and cooling infrastructure in preparation to host LSST data has entered its final phase. Located in Lyon, France, CC-IN2P3 has two computer rooms of 850 m2 each (9,150 ft2) hosting about 18,000 CPU cores, 28 PB of disk storage, and four automated tape libraries where 63 PB of data are stored. These resources are routinely used by several scientific projects, 24/7.

M1M3 Sails for Chile

April 9, 2019 - The 8.4-meter LSST Primary/Tertiary Mirror (M1M3) set sail from Houston, Texas, on Friday, April 5th! Along with some other LSST cargo, the M1M3 is securely stowed aboard the BBC Manitoba for an ocean voyage to Coquimbo, Chile; the trip is expected to take about five weeks. You can track the progress of the ship by entering the vessel's name in the search bar at this website.  


Bon Voyage (Buen Viaje) M1M3!

March 26, 2019 - UPDATE: The M1M3 has arrived in Houston and is now waiting for the ship that will take it to Chile. The trip from Tucson to Houston was uneventful for the mirror, but sparked a lot of curiosity from motorists who had to make way for this very oversized load! More photos, provided by transport company Precision Heavy Haul, Inc., are available in the LSST Gallery.

Reflecting on Calibration

March 5, 2019 - The object in this photo, called the calibration screen reflector, was manufactured in the National Optical Astronomy Observatory (NOAO) instrument shop, which is located in the same building as the LSST Project Office in Tucson, Arizona. Our talented instrumentation team has been working on this piece of equipment for many months, and it shows! The reflector will be an important component of the calibration system inside the dome of LSST; this system is designed to determine how real-world factors like dust, and evolution to the sensitivity of the equipment over time, affect the images taken by the LSST Camera.

Accounting for Atmosphere—DIMM Testing in Tucson

February 8, 2019 - The challenge to viewing and imaging celestial objects from the Earth’s surface is that the Earth’s atmosphere distorts light from space. When you look up at the stars and see them twinkle, you’re experiencing this phenomenon; light from stars is (generally) constant, but the light that reaches your eyes has been pushed around by turbulence in the Earth’s atmosphere. That turbulence is caused by the interaction of varying temperature and density layers between the Earth’s surface and space. Twinkling stars might be pretty to look at, but they’re pretty annoying for scientists who want a crisp, clear view of the objects they’re studying.


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 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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