Impact on wide-field optical astr Impact on wide-field optical - PowerPoint PPT Presentation

Impact on wide-field optical astr Impact on wide-field optical astronom onomy Tony Tyson University of California, Davis Chief Scientist, Vera C. Rubin Observatory Space on the Hill March 11, 2020

Rubin Observatory will execute the Legacy Survey of Space and Time , producing the deepest, widest, view of our dynamic Universe:

Rubin Observatory will execute the Legacy Survey of Space and Time , producing the deepest, widest, view of our dynamic Universe:  27-ft (8.4-m) mirror  3200 megapixel camera  Each image the size of 40 full moons  Scans the sky with 2000 images per night  10 year survey of the sky 2022-2032  37 billion stars and galaxies  10 million alerts, 20 Terabytes of data .. every night!  Signific Significantly im y impac pacted b by brigh bright sat satellit llite trails trails

Every circle contains ten million galaxies. Will observe ~half of sky, ~1000 times over ten years. 20 TB per day; 15 PB database at end of survey. ~40 billion objects will be cataloged by survey end – More objects than humans on Earth. Credit: Y. AlSayyad, A. Connolly, ESO/Y. Beletsky 4

Every circle contains ten million galaxies. Will observe ~half of sky, ~1000 times over ten years. 20 TB per day; 15 PB database at end of survey. ~40 billion objects will be cataloged by survey end – More objects than humans on Earth. The enormity of the faint galaxy catalog will open a new window on our understanding of Dark Energy. Science Driver 1 – Dark Energy and Cosmology Credit: Y. AlSayyad, A. Connolly, ESO/Y. Beletsky 5

Repeated observations of the sky will open new windows into the changing Universe, including millions of alerts on changes each night. Science Driver 2 – Transient Universe Credit: Y. AlSayyad, A. Connolly, ESO/Y. Beletsky

Repeated observations will also open new windows into the past and future of our Solar System, including identifying Potentially Hazardous Asteroids. Science Driver 3 – Solar System Credit: Y. AlSayyad, A. Connolly, ESO/Y. Beletsky

Automated discovery and data exploration 8

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Rubin Observatory LSST survey 2022-2032 February 11, 2020

Very small Two S tarlink satellites telescope with in a 30 sec exposure wide field of view. John Tonry 2019-08-27 U Hawaii

Rubin Observatory 3200 Megapixel Camera 13

Rubin Observatory 3200 Megapixel Camera 14

Satellite trail near saturation in the Rubin Observatory camera induces image artifacts 15

• SpaceX is working with the astronomical community to reduce the light pollution effects on optical astronomy • tt • Making the spacecraft 10‐20 times darker may remove some satellite trail artifacts in the Rubin Observatory camera • We are working with SpaceX to measure the effect of darkening test satellites in future launches • However, even if that works , evidence of satellite trails will clearly be in the data – complicating data analysis, limiting discoveries

Full end‐to‐end simulations Full end‐to‐end simulations 17