News and documentation for next proposal deadline:
1 mm VLBI Call for Proposals
The ALMA Observatory and the Event Horizon Telescope Consortium (EHTC) jointly issue an annual Call for Propsals 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). Up to 5% of ALMA 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 the Call.
Proposals should be submitted only in response to an ALMA proposal call issued by the ALMA Regional Centers, typically in March of each year. There is no requirement to submit a separate proposal to the EHTC. Proposal preparation is therefore through the ALMA Observing Tool (OT), which requires registration through the ALMA Science Portal (North America, Europe, East Asia) beforehand. The ALMA OT Quickstart Guide provides more information on how to use OT. For each Cycle additional information on proposing to ALMA may be found in the dedicated Proposers' Guide (e.g. Cycle 7) and Technical Handbook (e.g. Cycle 7).
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.