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Which are the OPC Categories? - Knowledgebase / ESO Proposal (Phase 1) - ESO Operations Helpdesk

Which are the OPC Categories?

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Which are the OPC Categories?

The Observing Programmes Committee (OPC) is the body in charge of reviewing, evaluating on scientific merit, and ranking the proposals submitted in response to a call for the use of ESO observing facilities of the La Silla Paranal Observatory and thereby advise the Director General on the distribution of observing time, taking account of ESO's scientific policy. The OPC is assisted in its task by Expert Panels covering specific scientific areas, called Categories. The OPC Categories are listed below. When submitting a proposal, the Principal Investigator and Co-investigators are requested to choose the appropriate OPC category for their proposal.


A1Galaxies in their environment (e.g. galaxies in groups and clusters, merging galaxies,
galaxy interactions, ram-pressure stripping of galaxies in groups and clusters)
A2Global properties of galaxy groups, clusters and proto-structures including the intracluster
A3Dark matter and gravitational lensing
A4Intergalactic medium, circumgalactic medium and intervening absorption systems
(e.g. Lyman alpha clouds, damped Lyman alpha systems and associated galaxies)
A5Discovery surveys and the statistical study of galaxy properties (e.g. spectroscopic
and redshift surveys, identifications, large scale structure, galaxy luminosity function
and mass function, surveys for active galactic nuclei)
A6Reionization and cosmic dawn (probes of reionization, galaxies in the epoch of
A7Cosmological parameters (e.g. distance scale, dark energy, fundamental physics).


B1The Milky way and local group galaxies
B2Resolved and unresolved stellar populations in galaxies beyond the Local Group (e.g.
stellar metallicity, star formation histories)
B3Galaxy structure, dynamics and kinematics (e.g. bulges, disks, morphology,
in/outflows, dark matter inside galaxies, stellar orbits)
B4Dwarf galaxies, stellar clusters in galaxies and satellite galaxies
B5Galactic centre, galaxy nuclei and supermassive black holes
B6Physics of Active Galactic Nuclei
B7Interstellar medium and star formation in galaxies (e.g., in/outflows, starburst
galaxies, gas-phase metallicity, dust in galaxies)


C1Gas and dust, giant molecular clouds, cool and hot gas, diffuse and translucent clouds
C2Chemical processes in the interstellar medium
C3Star forming regions, globules, protostars, HII regions
C4Pre-main-sequence stars (massive PMS stars, Herbig Ae/Be stars and T Tauri stars)
C5Outflows, stellar jets, HH objects
C6Main-sequence stars with circumstellar matter, early evolution
C7Young binaries, brown dwarfs, exosolar planet searches
C8Solar system (planets, comets, small bodies)


D1Main-sequence stars
D2Post-main-sequence stars, giants, supergiants, AGB stars, post-AGB stars
D3Pulsating stars and stellar activity
D4Mass loss and winds
D5Supernovae, pulsars
D6Planetary nebulae, nova remnants and supernova remnants
D7Pre-white dwarfs and white dwarfs, neutron stars
D8Evolved binaries, black-hole candidates, novae, X-ray binaries, CVs
D9Gamma-ray and X-ray bursters
D10OB associations, open and globular clusters, extragalactic star clusters
D11Individual stars in external galaxies, resolved stellar populations
D12Distance Scale - stars


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