13 September 2012 Design of the J-PAS and J-PLUS filter systems
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Abstract
J-PAS (Javalambre-PAU Astrophysical Survey) is a Spanish-Brazilian collaboration to conduct an innovative photometric survey of more than 8000 square degrees of northern sky using a system of 57 filters, 54 narrow-band (FWHM=13.8 nm) filters continuously populating the spectrum between 370 to 920 nm with 10.0 nm steps, plus 3 broad-band filters. Together with the main J-PAS survey, the collaboration is carrying out J-PLUS (the Javalambre Photometric Local Universe Survey), an all-sky survey using a set of 12 carefully optimized broad- and narrow-band filters that will be used to perform the calibration tasks for the main survey. The J-PAS survey will be carried out using JPCam, a 14-CCD mosaic camera using the new e2v 9.2k-by-9.2k, 10μm pixel detectors, mounted on the JST/T250, a dedicated 2.55-m wide-field telescope at the Observatorio Astrofísico de Javalambre (OAJ) in Teruel, Spain. J-PLUS, on the other hand, will be carried out using a wide field CCD camera (the T80Cam) equipped with a large format STA 1600 CCD (10.5k-by-10.5k, 9μm pixel) and mounted on the JAST/T80, a dedicated 0.83-m wide-field telescope at the OAJ. In both cases, the filters will operate close to, but up-stream from the dewar window in a fast converging optical beam. This optical configuration imposes challenging requirements for the J-PLUS and J-PAS filters, some of them requiring the development of new filter design solutions. This paper describes the main requirements and design strategies for these two sets of filters.
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A. Marín-Franch, S. Chueca, M. Moles, N. Benitez, K. Taylor, J. Cepa, A. J. Cenarro, D. Cristobal-Hornillos, A. Ederoclite, N. Gruel, J. Hernández-Fuertes, A. López-Sainz, R. Luis-Simoes, F. Rueda-Teruel, S. Rueda-Teruel, J. Varela, A. Yanes-Díaz, U. Brauneck, A. Danielou, R. Dupke, A. Fernández-Soto, C. Mendes de Oliveira, L. Sodré, "Design of the J-PAS and J-PLUS filter systems", Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 84503S (13 September 2012); doi: 10.1117/12.925430; https://doi.org/10.1117/12.925430
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