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Third Public Data Release by the Hyper Suprime-Cam Subaru Strategic Program

September 30, 2021
Last updated: October 22, 2021

The Subaru Telescope’s largest observing program, the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP), has made its third dataset available to the world-wide community. HSC-SSP is a 330-night program to survey a large area of the sky down to unprecedented depths in order to address the nature of dark matter and dark energy. This release covers 670 square degrees of the sky from the wide-area component of the survey as well as 30 square degrees for a deeper survey of distant objects. In total, the release includes over 500 million objects collected over 278 nights of observing time. The precise positions, brightnesses, and shapes of all these objects are carefully measured, allowing astronomers from all over the world to make new discoveries.

HSC-SSP is in the final phase; the remaining observing time is only about 20 nights and is expected to finish within 2021. The fourth release will be the last data release. The entire Japanese community is going to make a final push to make major contributions to many areas of astronomy using the entire dataset from HSC-SSP.

Third Public Data Release by the Hyper Suprime-Cam Subaru Strategic Program Figure

Figure 1: A massive cluster of galaxies at 4 billion years ago. Galaxy clusters make ideal laboratories to study galaxy evolution and the nature of dark matter. (Credit: NAOJ/HSC-SSP)

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