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10 BILLION LIGHT YEARS
Gamma-Ray Bursts

Gamma-ray bursts are some of the most powerful events in the Universe and are
one of the many transient phenomena the CTAO will target in the hopes of
bringing further clarity to their physics and discovering entirely new objects.

Credit: NAOJ


1 BILLION LIGHT YEARS
Active Galactic Nuclei

Galaxies hosting an actively accreting supermassive black hole, called ‘active
galaxies,’ are among the most luminous objects in the extragalactic sky and emit
light across the entire electromagnetic spectrum. Feedback from their active
galactic nucleus (AGN) is believed to influence the evolution of the host galaxy
and even the galaxy cluster.

Credit: NASA/CXC/CfA


100 MILLION LIGHT YEARS
Star Forming Systems

Gamma rays are a powerful tool to study cosmic rays in star-forming
environments, and the CTAO observations of star-forming systems will help to
reveal the relationship between high-energy particles and the star-formation
process. This image of one of the CTAO’s targets, Messier 82, is a star forming
system in the constellation Ursa Major.

Credit: NASA, ESA, Hubble


10 MILLION LIGHT YEARS
1 MILLION LIGHT YEARS
Large Magellanic Cloud

The Large Magellanic Cloud (LMC) is a unique galaxy that hosts a wide range of
objects of interest to the CTAO. Observations of this star-forming galaxy will
address many CTAO science objectives: population studies of supernova remnants
and pulsar wind nebulae, transport of cosmic rays on large scales and the search
for dark matter.

Credit: Bucksnort Observatory


100,000 LIGHT YEARS
Galactic Plane

Surveys of our own Galaxy provide essential, large-scale data sets, which form
the foundation for galactic science at all photon energies. The region within a
few degrees of the Galactic Centre is rich with a wide variety of high-energy
emitters. This simulation of what we think the CTAO will see adds hundreds of
objects to existing findings.


10,000 LIGHT YEARS
Supernova Remnant

When certain stars reach the end of their natural lifetime they die in a
gigantic explosion called a supernova. The explosion causes a large part of the
star’s shell to be expelled at very high speeds creating shock fronts called
supernova remnants (SNRs). This image is of the Tycho’s supernova (SN 1572) as
seen by the Chandra X-ray Observatory.


1000 LIGHT YEARS
Pulsar

Pulsars are neutron stars that are highly magnetized and rotate at enormous
speeds. As its rotation slows, it creates a pulsar wind, and as the wind slows
it spreads into a “cloud” called a pulsar wind nebulae. A hot pulsar spinning 30
times per second powers the Crab Nebula and serves as a “standard candle” for
Cherenkov telescopes.

Credit: ASU, CXC, HST, NRAO, NSF, NASA


BILLIONS OF KILOMETERS
Local Cosmic Rays

Cosmic rays are accelerated to extremely high energies, traveling close to the
speed of light. Cosmic rays constantly bombard the Earth, but their sources are
still not clear. Some gamma rays are by-products of high-energy cosmic ray
interactions and can be studied to find their sources and the roles they play in
our Galaxy and beyond.

Credit: NSF/J.Yang


EARTH



CHERENKOV TELESCOPE ARRAY OBSERVATORY


EXPLORING THE UNIVERSE AT THE HIGHEST ENERGIES


FEATURED VIDEO



How will the CTAO explore the Universe at the highest energies? This science
animation takes you through the process — from the emission of gamma rays by
extreme sources and the collection of Cherenkov light by CTAO telescopes on
Earth to data analysis and discovery. Head to our YouTube channel to subscribe
and see more videos!

VIEW MORE


ABOUT



The Cherenkov Telescope Array Observatory (CTAO) is the next generation
ground-based instrument for gamma-ray astronomy at very-high energies. With 64
telescopes located in the northern and southern hemispheres, the CTAO will be
the first open ground-based gamma-ray observatory and the world’s largest and
most sensitive instrument to study high-energy phenomena in the Universe. 

READ MORE


SCIENCE



The CTAO’s unique capabilities will help to address some of the most perplexing
questions in astrophysics, seeking to understand the origin and role of
relativistic cosmic particles, probe extreme environments and explore physics
frontiers.

READ MORE


PROJECT



The project to build the CTAO is well advanced – working prototypes exist for
all the telescope designs and significant site preparations have been
undertaken. The CTAO will build on the technology of current ground-based
detectors, utilizing three classes of telescopes to cover CTAO’s broad energy
range.

READ MORE


LATEST NEWS

UNIVERSITY OF CALIFORNIA AWARDED $3.9 MILLION TO DEVELOP ALIGNMENT SYSTEM FOR
MEDIUM-SIZED TELESCOPES

2024-January-26



SEASON’S GREETINGS FROM THE CTAO DIRECTOR GENERAL, STUART MCMULDROCH

2023-December-28



LST-1 DISCOVERS THE MOST DISTANT AGN AT VERY HIGH ENERGIES

2023-December-26



MAJOR TELESCOPE OPERATIONS MILESTONE ACHIEVED WITH ACADA SOFTWARE INTEGRATION

2023-December-20



GO TO ARCHIVE


MST

The Medium-Sized Telescopes (MSTs) are the CTAO's "workhorse," optimized for
sensitivity within the core energy range of the CTAO, from about 150 GeV to 5
TeV. Its large field of view of 7-8 degrees will enable the MST to take rapid
surveys of the gamma-ray sky.
Read More

SST

The Small-Sized Telescopes (SSTs) will cover the high end of the CTAO energy
range, between a few TeV and 300 TeV. The SSTs will outnumber all the other
telescopes and will be spread out over several square kilometers in the southern
hemisphere array.
Read More

LST

The Large-Sized Telescopes (LSTs) cover the unique low-energy sensitivity of the
CTAO between 20 and 150 GeV. The entire structure weighs 100 tonnes but is
extremely nimble, with the ability to rapidly slew toward targets within 20
seconds.
Read More



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CONTACT


Cherenkov Telescope Array
Observatory gGmbH (CTAO gGmbH)
Saupfercheckweg 1
69117 Heidelberg
Germany
+49 (6221) 516 471
ctao-info@cta-observatory.org

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