Data Releases

I heard some new Rubin data just got released. What’s the significance?

It’s true, Rubin Observatory recently placed an exciting new dataset in the hands of eager scientists around the world! This is the first large collection of science-ready data from the LSST Camera. It includes tens of thousands of images as well as catalogs of objects built from observations taken before the Legacy Survey of Space and Time (LSST) officially began. For scientists who have spent years preparing for Rubin, this is the moment they can finally dig into Rubin data on a large scale.

How was this data set created?

Creating a data release like this is no small task. After this set of observations was collected (April 20, 2025 - January 1, 2026) Rubin’s data management team spent months processing the data into science-ready products. Individual exposures were carefully calibrated and combined into deep, coadded images, while catalogs of detected astronomical objects were generated to support a wide range of scientific investigations.

Who can use the data?

This data set is now available to professional researchers in the United States and Chile, as well as scientists at institutions around the world who are part of Rubin’s international in-kind program. Scientists access the data via the cloud-based Rubin Science Platform, where they can analyze data without having to download it.

Are data releases the only way Rubin serves data to scientists?

No — although this data release offers scientists a powerful new resource, it’s not the only data researchers can access. Every night, Rubin continues to produce alerts as it scans the sky, rapidly identifying changes like moving asteroids, flickering stars, supernovae, feeding black holes, and more. These alerts require a different type of processing than the deep image and catalog products of a data release. Speed matters for detecting changes in the cosmos, so the alerts are generated in near-real-time and served to the science community by Rubin’s alert brokers within just a few minutes.

Throughout the 10-year Legacy Survey of Space and Time, Rubin will continue producing these two complementary types of data: rapid alerts for events that need quick attention and possible follow-up activities, and periodic data releases that provide deeper and deeper views of the sky. Together they enable scientists to investigate a broad range of science questions, from the movement of nearby objects in our Solar System to the evolution of galaxies across cosmic time. By serving several kinds of science at the same time, Rubin will enable countless discoveries over the next decade, all from a single survey of the sky.

Explore more:

• Check out Rubin’s COSMOS web page

• Explore another image from the recently released data: Ocean of Stars

• Learn more about how Rubin collects, processes, and distributes data

• Find out more about Rubin alerts