ALMA Cycle 8 2021 proposals now under review

ALMA Cycle 8 2021 is currently scheduled for observations from October 2021 to September 2022. Users of any nationality or affiliation were invited to submit proposals before the deadline of 15:00 UT on Wednesday 21 April 2021.

Find more details on the anticipated timeline here.


The key dates for Cycle 8 2021 are:

Date Milestone
17 March 2021 Release of the ALMA Cycle 8 2021 CfP and Observing Tool, and opening of archive for proposal submission
21 April 2021 (15:00 UT) Proposal submission deadline
August 2021 Announcement of the outcome of the proposal review process process
October 2021 Start of Cycle 8 2021 observations
September 2022 End of ALMA Cycle 8 2021

Proposal types in Cycle 8 2021 will include Regular, Very Long Baseline Interferometry (VLBI), Passive Phasing, Target of Opportunity, and Large Program.  VLBI proposals work in concert with the Global mm-VLBI Array (GMVA) or the Event Horizon Telescope (EHT).  GMVA programs must also submit a proposal to the GMVA by its 1 February 2021 deadline. Additional information about proposing with ALMA using the GMVA will be made available in the GMVA Call for Proposals in early January 2021. 

Antenna configurations for the main 12-m Array will be called C-1, C-2, and so on up to C-10, with C-1 having similar characteristics to the C43-1 configuration of Cycle 7, and likewise for the others.  Cycle 8 2021 will not include the two longest baseline 12-m Array configurations, C-9 and C-10.  Maximum baselines in Cycle 8 2021 will therefore be 8.5 km in configuration C-8. Configurations C-9 and C-10 with maximum baselines of 13.9 km and 16.2 km, respectively, will again be available in Cycle 9.

In addition to the main Cycle 8 2021 CfP, the JAO will issue a Supplemental Call for proposals to use the ACA in stand-alone mode.  More information on the Supplemental Call is given below.

New in Cycle 8 2021

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

Updates to the Proposal Review Process

 ALMA will adopt a distributed peer review process for scientific review of most proposals submitted to Cycle 8 2021. After a successful pilot run in the Cycle 7 Supplemental Call (see ALMA Memo 616), distributed peer review will be used for all proposals requesting less than 25 hours on the 12-m Array, and ACA stand-alone proposals requesting less than 150 hours on the 7-m Array. In this review system, for each submitted proposal the PI (or one of the delegated co-Is) will be responsible for reviewing up to 10 other submitted proposals, thus increasing the involvement of the ALMA community in the review process.

A FAQ on the proposal process is available here.


ALMA Cycle 8 Call for Proposals delayed!

On behalf of the ALMA Director, with support from all Executives and the ALMA Board, the recent decisions taken regarding the status of Cycle 7 and Cycle 8 are as follows:

  • The start of ALMA Cycle 8 has been postponed until 2021 October. It is anticipated that the Cycle 8 Call for Proposals will open again in 2021 March.
  • ALMA Cycle 7 will continue through 2021 September, with currently non-completed projects ranked A, B and C remaining in the observing queue.

There remain many questions outstanding regarding resuming observations and accepting future proposals during these uncertain times.  ALMA is working on these questions and will provide a next update to the community in the coming weeks.

The Regional ARCs continue to provide support to their communities. Please contact the ALMA Helpdesk at https://help.almascience.org if you have any questions, comments or concerns.

More information is provided in the following News Item