1 mm VLBI Call for Proposals
The ALMA Observatory and the Event Horizon Telescope Consortium (EHTC) invite proposals for 1 mm Very Long Baseline Interferometry (VLBI) using the phased output of the Atacama Large Millimeter/submillimeter Array (ALMA) and the Event Horizon Telescope (EHT) during ALMA Cycle 6. Up to 5% of ALMA Cycle 6 observing time is available for VLBI, shared between 1 mm and 3 mm. Note that the EHT without phased ALMA is not being offered as part of this Call.
Proposals should be submitted only in response to the ALMA Cycle 6 Proposal Call. There is no requirement to submit a separate proposal to the EHTC (as was the case in Cycle 4). Proposal preparation is therefore through the ALMA Observing Tool (OT), which requires registration through the ALMA Science Portal beforehand. The ALMA OT Quickstart Guide provides more information on how to use OT. Additional information on proposing to ALMA may be found in the ALMA Cycle 6 Proposer's Guide.
An overview of phased ALMA and the EHT, and further technical information to support proposal preparation is available below; click on a particular tab to expand it. Proposers who need assistance with proposal preparation or have questions regarding the Call should submit a ticket to the ALMA Helpdesk.