LBTB Call for Proposals 2023B & 2024A

LBTB Call for Proposals 2023B and 2024A

AIP Observing Time at the LBT

The German partners in the Large Binocular Telescope are expected to be allocated a total of about 54 nights for the semesters 2023B and 2024A (Sep.2023-Jun.2024). The AIP share is about 8 nights which will be available for general observing programs.

Note that the call covers a full year and there will be no additional call in the fall but only in April 2024!

Please use the Phase I Tool named "pit"  (instructions and download available at the LBTO: pit help) for proposal preparation and submission.

Please check the instrumentation offered at this LBTO webpage. The information on the instruments and their use is available from LBTO Science Operations. Note that successful applicants might have to provide an observer for taking active part in executing the observing queue, either on-site or remotely.


8:00am (CEST), Friday, April 28, 2023


The ISC has been tasked with organizing the call for proposals and a Time Allocation Committee TAC has been charged by the institute management to rank the proposals according to scientific merit, but also judge their perspectives to generate visible scientific output on relatively short timescales.

Before passing the accepted programs to the observatory for implementation, there will be a phase-II where observing blocks for LBC, scripts and MOS masks for LUCI and MODS and README files for PEPSI will have to be prepared.

The assignment of observing time is intended to be completed by the end of June and successful applicants will be asked to submit their phase-II material for targets which can be observed during 2023B by July 14'th 2023 to (with a Cc to


We do not have a fixed format for the proposal but the scientific justification should not be longer than one page. Another two pages can be used for the technical justification, references and figures. Please make sure that you clearly state the objective of the project and give a justification for the amount of observing time requested and that you address explicitly the selection criteria listed below. Please use the new Phase-I Tool (pit) for preparing and submitting your proposal. Your three page justification can be attached as a pdf file from within the tool.

Selection criteria for the present call:

  • Scientific merit as assessed by the TAC. Be aware that the TAC members will be from various scientific areas. Proposals avoiding jargon and expressing their cases in simple terms may find it easier to convince the TAC. The concrete criteria which will be applied and which should be specifically addressed in the proposal include:
    • The relevance and importance of the proposal within the area of specialization
    • The scientific merit in the larger context of astronomical research
    • The suitability of the experimental design to achieve the scientific goals (technical feasibility/potential problems with the data)
    • The significance of the proposed observations for the completion of the project
    • The likelihood that the researchers will complete the project and publish their results (adequacy of available resources and foreseen visibility)
    • Status of previous LBT time allocations
  • Due to the low pressure factor for observations under marginal conditions there is a category of back-up programs. These programs will not be counted against our share of 'good' condition observations, so such programs are particularly welcomed! If you have such a proposal, please make it expressly clear that it belongs to this category.

Links with technical information about the LBT, the available instruments and their performance can be obtained from the LBTO Science Operations. We also have an LBT resource page with additional relevant information.


Phase-II material should be prepared using the LBT Observing Tool (OT) available in the Observing Tool Manual. In addition to the output from the OT an ASCII README file is required which should contain the relevant primary constraints (coordinates, seeing, cloudiness, time constraints, etc).  Note that MOS observations require MOS masks to be produced well in advance of the observing run, so all phase-II material including mask files should be made available by July 14'th, 2023. The phase-II material should be send to the e-mail address: as a gzipped tar-file with a Cc to

With the best regards on behalf of the ISC,

Jesper Storm (AIP LBT observing contact person)

Last update: 11. July 2023