ALMA Cycle 9 Call for Proposals is now closed

ALMA Cycle 9 is scheduled for observations from October 2022 to September 2023. Users of any nationality or affiliation are invited to submit proposals before the deadline.The Cycle 9 proposal submission deadline was 15:00 UT on Thursday, 21 April 2022.

For Cycle 9, the JAO anticipates having 4300 hours of approved science time on each of the 12-m, 7-m, and the Total Power arrays. Together, the 7-m Array and Total Power Array form the Atacama Compact Array (ACA), also known as the Morita Array. Projects with observations in the highest-frequency Bands 8, 9, and 10 are strongly encouraged.

Cycle 9 will not include a Supplemental CfP for stand-alone ACA observations. The community is encouraged to submit ACA standalone projects, especially in the LST range of 20h to 10h, for the April 2022 deadline.

Find more details here.


Date Milestone
24 March 2022 Release of Cycle 9 CfP, Observing Tool, and supporting documents, and opening of the Archive for proposal submission
21 April 2022 (15:00 UT) Proposal submission deadline
August 2022 Announcement of the outcome of the proposal review process
October 2022 Start of Cycle 9 science observations
September 2023 End of ALMA Cycle 9

The proposal types in Cycle 9 will be the same as in Cycle 8 2021. Principal Investigators submitting a proposal to ALMA for Very Long Baseline Interferometry (VLBI) observations in ALMA Band 3 made in concert with the Global mm-VLBI Array (GMVA) at 3 mm must also submit a proposal to the GMVA by its 1 February 2022 deadline. 

In the main 12-m Array, antenna configurations C-1 to C-10, with maximum baselines between 0.16 and 16.2 km, will be offered. 

For Cycle 9 the JAO will only issue a Supplemental Call for the ACA in stand-alone mode if needed for scheduling purposes. Therefore, proposers are encouraged to submit ACA stand-alone proposals for the Main Call. In particular, proposers are encouraged to submit ACA stand-alone observations for targets that can be observed in the LST range of 20h to 10h.


New in Cycle 9

 The following technical capabilities will be available this Cycle for the first time:

The total time available for projects needing band-to-band phase transfer calibration is expected to be capped at approximately 45 hours.

Updates to the Proposal Review Process