ALMA Cycle 5 Pre-announcement

Published: 16 Dec 2016
ALMA antenna

The Joint ALMA Observatory (JAO) will start the next cycle of observing (Cycle 5) in October 2017. A Call for Proposals with detailed information on Cycle 5 will be issued in March 2017, with a deadline for proposal submission in April 2017. This pre-­announcement highlights aspects of the Cycle 5 proposal call that are needed to plan proposals.

Details about the Cycle 5 Pre-annoucnement can be found in the ALMA Science Portal.

ALMA Cycle 5 will start in early October 2017 and span 12 months. It is anticipated that 4000 hours of 12-­m Array time will be available for successful observations of approved projects, and 3000 hours will be available on the Atacama Compact Array (ACA), also known as the Morita Array.

The key dates for Cycle 5 are given below.

  • 21 March 2017 Release of the ALMA Cycle 5 Call for Proposals and Observing Tool, and opening of archive for proposal submission
  • 20 April 2017 Proposal deadline
  • End of July 2017 Result of the proposal review sent to Proposers
  • 15 September 2017 Submission of Phase 2 by Proposers
  • October 2017 Start of ALMA Cycle 5 observations
  • September 2018 End of Cycle 5 observations


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Antennas of the Atacama Large Millimeter/submillimeter Array (ALMA), on the Chajnantor Plateau in the Chilean Andes. The Large and Small Magellanic Clouds, two companion galaxies to our own Milky Way galaxy, can be seen as bright smudges in the night sky, in the centre of the photograph. Credit: ESO/C. Malin