Vera C. Rubin Observatory Begins Commissioning LSSTCam for Dark Energy Research
The Vera C. Rubin Observatory started commissioning its camera (LSSTCam) in April 2025, with the Legacy Survey of Space and Time (LSST) scheduled to begin in 2026. The primary science goal is constraining Dark Energy through weak gravitational lensing measurements of cosmic structure. After one year of LSST data, these measurements are expected to provide precision comparable to the Dark Energy Spectroscopic Instrument (DESI) and test whether Dark Energy evolves over time.
The Vera C. Rubin Observatory has entered the commissioning phase of its camera system (LSSTCam) as of April 2025, with full survey operations expected to commence in 2026. A central objective of the Legacy Survey of Space and Time (LSST) is to constrain Dark Energy by measuring weak gravitational lensing effects on the large-scale structure of the universe, known as cosmic shear. The observatory's measurements are projected to achieve precision levels comparable to recent results from the Dark Energy Spectroscopic Instrument (DESI) within one year of operation, offering an independent method to test emerging evidence that Dark Energy may not be constant but could evolve over cosmic time. The commissioning process focuses on addressing instrumental systematics that are critical for the accuracy of cosmic shear measurements. This work represents a significant step forward in observational cosmology and the ongoing effort to understand the nature of Dark Energy.
What different sources said
- arXiv astro-phCenter
Commissioning of the Vera C. Rubin Observatory and Weak Gravitational Lensing
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