Introduction

The National Radio Astronomy Observatory (NRAO) invites scientists to participate in the Semester 2025A Call for Proposals for the Karl G. Jansky Very Large Array (VLA) and the Very Long Baseline Array (VLBA), High Sensitivity Array (HSA), and Global mm VLBI Array (GMVA).

The submission deadline for Semester 2025A proposals is Wednesday, 31 July 2024, at 17:00 EDT (21:00 UTC).

For the VLA, the D and C-configurations will be available. It is anticipated there will be around 2910 hours on the VLA and 570 hours on the VLBA available for science observing. Opportunities for Joint proposals will be available for ALMA, JWST, HST, Swift, Chandra, XMM-Newton, and NICER. Joint Proposals with ALMA or JWST need to be submitted to the facility requesting the larger amount of observing time.

The array configurations available for joint ALMA/VLA will be: ALMA C-1 to C-10 and VLA D and C configurations.

The NRAO 2025A Call for Proposals is for observations with the VLA and VLBA/HSA/GMVA; the corresponding call for the GBT can be found at the GBO Call for Proposals.  

A detailed timeline for the 25A Proposal Call is available here and summarized in the table below:

 
DateAction
26 June 2024 NRAO/GBO Call for Proposals
31 July 2024 NRAO/GBO Proposal Deadline @ 17:00 EDT
29 August 2024 Individual Science Reviews Completed
13 September 2024 Science Review Panel (SRP)  Meetings Completed
14-15 October 2024 Telescope time allocation committee (TAC) meeting
05 November 2024 Disposition Letters Sent

Connect with NRAO

The National Radio Astronomy Observatory and Green Bank Observatory are facilities of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.

Founded in 1956, the NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media.

The National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 "to promote the progress of science; to advance the national health, prosperity, and welfare; to secure the national defense..."

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