Swedish-ESO PI receiver for APEX

The Submillimetre APEX Bolometer Camera (SABOCA) was a bolometric receiver installed on the Atacama Pathfinder Experiment telescope (APEX), located at 5100 metres in altitude on Chile’s Chajnantor Plateau in the Atacama Desert. The pioneering APEX is the forerunner to the powerful Atacama Large Millimeter/Submillimeter Array, which operates at millimetre and submillimetre wavelengths of light. These wavelengths are key for observing the cold Universe, including gas, dust and other objects that are just a few degrees above absolute zero (-273.15° C).

SABOCA observes wavelengths of around 350µm (similar to ALMA Band 10) with its 37 superconducting bolometers. Bolometers are highly sensitive instruments that detect incoming light by registering the resulting rise in temperature. They do not measure temperature in the same way that thermometers do, but rather they measure the energy of the light received from sources in the sky.

The receiver was built by the Max-Planck Institute for Radio Astronomy in collaboration with the Institute of Photonic Technology. SABOCA complements the existing suite of submillimetre receivers available on APEX.

SABOCA is a versatile instrument that can observe a range of objects of great interest in the various different fields of today’s astrophysics: from our own Solar System to the debris discs around nearby young stars; from molecular clouds and star-forming regions in our Milky Way to cold dust in galaxies at various redshifts and evolutionary stages; all the way to the early epochs of the Universe, constraining the star formation rates in high-redshift starburst galaxies.

SABOCA was decommissioned in 2012.


The authoritative technical specifications as offered for astronomical observations are available from the Science Operation page.

Location: Chajnantor
Telescope: APEX
Focus: Cassegrain
Type: Submillimetre
Wavelength coverage: 352 μm
Spatial resolution: 7.5 arcseconds/beam with a field of view of approximately 2 arcminutes.
Spectral resolution:
First light: 2009
Science goal: Observing the cold Universe
Images taken with the instrument: Link
Images of the instrument: Link
Videos related to the instrument: Link


  • Max Planck Institute for Radio Astronomy (MPIfR) in Bonn
  • ESO
  • Institute of Photonic Technology (IPHT)