Vera C. Rubin Observatory Archives

Simulated multiband light-curve populations in the Cchroma–Ccross diagnostic plane. Left: noise-dominated, natural, and coherent variability classes (N ≈ 167 each, 500 total); ellipses show population covariance, open circles mark centroid-nearest examples. Right: normalised Rubin/LSST g, r, i light curves for those examples; coherent case shows stable cross-band structure, natural case shows stochastic variability, noise case is dominated by incoherent fluctuations. -- astro-ph.IM

Astrochemistry, Astronomy & Telescopes, Biosignatures & Paleobiology, SETI & Technosignatures, Status Report

Prospects for Astrobiology And Technosignature Searches With The Vera C. Rubin Observatory Legacy Survey Of Space And Time

by Keith CowingJune 12, 2026June 12, 2026

The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will map sources in multiband colour–variability space.

The Vera C. Rubin Observatory sits on its mountain peak in Chile during observation activities in April 2025. The observatory will soon begin real-time nightly monitoring of the entire Southern Hemisphere sky. On Feb. 24 the observatory successfully sent out 800,000 public alerts of changes in the night sky. The alerting system is eventually expected to produce seven million alerts per night. Credit RubinObs/ NOIRLab/SLAC/NSF/DOE/AURA/P. Horálek (Institute of Physics in Opava)

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release, Stellar Cartography

Stellar Cartography: Rubin Observatory Launches Real-time Monitoring Of The Sky With Thousands Of Alerts

by Keith CowingMarch 2, 2026March 2, 2026

On Feb. 24, astronomers’ computers around the world lit up with a deluge of cosmic notifications — 800,000 alerts about new asteroids in our solar system, exploding stars across the […]

Minimum accreted masses inferred from the five most commonly detected elements

Astrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

The Future of Evolved Planetary Systems

by Keith CowingJanuary 4, 2026January 3, 2026

Understanding the formation, evolution, and chemical diversity of exoplanets are now central areas of astrophysics research. White dwarfs provide a uniquely sensitive laboratory for studying the end stages of planetary-system […]

This illustration shows a red dwarf star orbited by a hypothetical exoplanet. Red dwarfs tend to be magnetically active, displaying gigantic arcing prominences and a wealth of dark sunspots. Red dwarfs also erupt with intense flares that could strip a nearby planet’s atmosphere. -- NASA

AI - Data - Apps - Cybernetics, Astronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Press Release, Radiation, Space Weather & Heliophysics

The Largest Ground-based Catalogue Of M-dwarf Flares

by Keith CowingOctober 30, 2025October 30, 2025

We present the largest ground-based catalogue of M-dwarf flares to date, comprising 1,229 time-resolved events identified in Zwicky Transient Facility Data Release 17.

On the left is a cutout from a crowded field (visit id=2025070100200) centered on 3I/ATLAS. The red ring represents the LSST Science Pipeline’s aperture photometry radius (see Section 4.7). In the image, 3I/ATLAS is seen nestled between four sources (two to the left, two to the right). The brighter three (one to the left, and two to the right) have been detected as separate and deblended (marked with yellow plus symbols). The fourth source (just to the left of 3I/ATLAS, and inside the red ring) has not. The resulting footprint – a set of pixels deemed by the deblender to contain 3I/ATLAS’s flux – is shown on the right. The deblender successfully removed the flux belonging to the three detected stars, preventing major biases in photometry and astrometry. However, the flux due to the fainter undetected star is still present. This illustrates both the power and caveats in deblender applications: while the worst effects of crowding are mitigated, some low-level residual flux due to faint blended sources likely remains. -- astro-ph.EP

Astrochemistry, Astrogeology, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Comets and Asteroids, Icy Worlds, Imaging & Spectroscopy, Interstellar, Status Report

NSF-DOE Vera C. Rubin Observatory Observations of Interstellar Comet 3I/ATLAS (C/2025 N1)

by Keith CowingJuly 22, 2025July 22, 2025

We report on the observation and measurement of astrometry, photometry, morphology, and activity of the interstellar object 3I/ATLAS, also designated C/2025 N1 (ATLAS), with the NSF-DOE Vera C. Rubin Observatory.

The circumstellar disk candidate in optical (left) from the Rubin Observatory “First Look” image and in infrared (right) from the Spitzer IRAC Healpix survey. Both images are 40″ on a side. North is up, east is left. -- AAS

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Possible Proplyd Disk Discovered In Rubin Observatory’s First-Look Image

by Keith CowingJuly 17, 2025

On 23 June 2025, the public got its first look at images from the NSF–DOE Vera C. Rubin Observatory — and the discoveries are already starting to roll in. Trifid […]

This image combines 678 separate images taken by NSF-DOE Vera C. Rubin Observatory in just over seven hours of observing time. Combining many images in this way clearly reveals otherwise faint or invisible details, such as the clouds of gas and dust that comprise the Trifid nebula (top right) and the Lagoon nebula, which are several thousand light-years away from Earth. Credit: NSF-DOE Vera C. Rubin Observatory Explore this image in full resolution on the NSF-DOE Rubin Observatory website.

Astronomy & Telescopes, Imaging & Spectroscopy, Press Release

First Imagery From The NSF-DOE Vera C. Rubin Observatory

by Keith CowingJune 23, 2025June 23, 2025

From distant stars and galaxies to asteroids whizzing through the solar system, this next-generation facility unveils its first imagery and brings the night sky to life like never before.

Transit zones for all solar system planets are plotted in heliocentric ecliptic coordinates (left) and in celestial coordinates (right). Each planet’s transit zone is shown as a colored sinusoidal band. Sensors located in the colored regions of sky could detect the corresponding planets as they transit the Sun. Overlaps between colored bands indicate regions where multiple planets could be detected. Note there are 28 regions of overlap between sets of two planet transit zones and 8 regions of overlap for sets of three planets. We adapt code from Wells et al. (2018) and use the updated transit zone geometry (Figure 1) to calculate and plot the full transit zone angles as ϕTZ = 2 arcsin((R⊙ − Rp)/r). -- astro-ph.IM

Astronomy & Telescopes, Biosignatures & Paleobiology, Imaging & Spectroscopy, Intelligence & Language, Press Release, SETI & Technosignatures

Technosignature Searches With Real-time Alert Brokers

by Keith CowingJune 18, 2025June 18, 2025

We present an exploration of technosignature research that is possible using real-time alert brokers from surveys such as the Zwicky Transient Facility (ZTF) and the upcoming Legacy Survey of Space […]

The Milky Way over Vera C. Rubin Observatory. Credit: Rubin Observatory/NSF/AURA/B. Quint.

Astronomy & Telescopes, Exoplanets, -moons, -comets, Status Report

Sorcha: Optimized Solar System Ephemeris Generation By Rubin Observatory

by Keith CowingJune 11, 2025September 18, 2025

Sorcha is a solar system survey simulator built for the Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) and future large-scale wide-field surveys.

The LSST throughput curves across the ugrizybands (colored lines) represent the combined effects of the Rubin Observatory system4, including mirrors, lenses, filters, detectors, and a fiducial atmosphere at 1.2 airmasses (black dash-dotted line). Overlaid is a scaled spectrum of a 2R⊕ exoplanet atmosphere (solid blue line), orbiting a 1R⊙ star, modeled using ExoTransmit(Kempton et al., 2017). The Vegetation Red Edge (thick maroon line), from RapidEye Multi-Spectral Imager data 5, shows the reflectance increase near 700 nm. If an Earth-like exoplanet orbiting a Sun-like star harbored vegetation with similar photosynthetic properties, a comparable red edge feature could manifest in the exoplanet’s phase curve, detectable as brightness variations in LSST’s iband. LSST’s repeated observations over 10 years could enable statistical reconstruction of such phase curves. Vertical dotted lines mark biosignature wavelengths. -- Frontiers

Astrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Multiscale Astrobiology With The Vera C. Rubin Observatory Legacy Survey Of Space and Time

by Keith CowingMay 24, 2025May 24, 2025

The Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) presents an unprecedented opportunity to advance the search for astrobiologically relevant data across diverse astronomical environments.