This page describes the two-stage submission process for Joint JWST Proposals where the Partner Observatory (ALMA, Chandra, Hubble, NRAO, or XMM-Newton) is prime and JWST is secondary. 

The first step is the submission of the proposal through the Partner Observatory Call for Proposals. This step requires a scientific justification and high-level description of the JWST observations following the guidelines in the Partner Observatory Call for Proposals.

The second step is the submission via APT of the APT file and a PDF attachment consisting of an Extended JWST Scientific and Technical Justification for Joint Programs. Proposers must provide STScI with an APT file that provides a full description of the proposed JWST observations. This is to allow the requested JWST observations to be held to the same technical standards as for all General Observer JWST proposals during the technical reviews that all accepted proposals are subject to. This requirement applies to all Joint JWST programs approved by the ALMA, Chandra, Hubble, NRAO, and XMM-Newton TACs.  The APT file and associated technical information must be submitted via APT no later than four weeks after the Partner Observatory proposal deadline has passed. The required information is as follows:

• The APT file with the detailed observations. The proposal must have the same Title and Abstract as in the Partner Observatory proposal, adding the Partner Observatory ID to the Abstract so it can be matched to the Partner Observatory program. Proposers should make sure that they the mark the APT coversheet using the menu that expands out corresponding to "Coordinated telescopes", providing all the requested information including the Partner Observatory and Partner Observatory proposal ID. 
• A PDF attachment consisting of an Extended JWST Scientific and Technical Justification for Joint Programs, which must be prepared using this template. This text expands upon the information included in the Partner Observatory proposal and is required for the technical review. Proposers should not attach the entire Partner Observatory proposal to their submission, only the Extended JWST Scientific and Technical Justification for Joint Programs.