Deadline: 2026-09-15 23:59 CEST Open

CEFCA announces a Call for Legacy Surveys with the JST250 Telescope operating at the OAJ. Eligible projects must be conducted with the JST250 telescope and its large field of view imager JPCam.

Proposals shall include the Scientific Rationale, emphasizing the Legacy Value of the data, and an overall description of the Observing Strategy and Filter System. A summary of the main aspects of the call follows:

• 240 hours per year are offered during 5 years (for a total of 1200 hours) to perform Legacy Surveys with the JST250 telescope.
• 56 J-PAS and SDSS g,r,i filters integrated at JPCam are offered.
• The definition of new filters is also possible. In that case, a feasibility analysis shall be provided.
• The expected starting date for the observations of surveys using JPCam and existing filters is 2027A.

Full details of the call can be found in the document linked below.

The submission deadline for the Legacy Surveys Proposals is 15th September 2026, 23:59 CEST. A template of the application can be downloaded using the links below. Applications, CSV files containing pointings (and accompanying documentation if required) should be submitted in PDF and CSV formats to the following email: JST250Surveys@cefca.es. Should you have questions, contact us via the same e-mail address.

Notice that, besides the Legacy Surveys, other ways of applying for observing time are offered by CEFCA every semester for Target of Opportunity (ToO) and Director's Discretionary Time (DDT) programs. You can see the details here.