P2.040 — The Javalambre Survey Telescope (JST/T250): a multi-filter surveying machine for the Northern hemisphere

Date & Time

Aug 10th at 6:00 PM until 7:30 PM




Rating ( votes)

Author(s): Javier Cenarro1, Antonio Marin-Franch1, Mariano Moles1, David Cristobal-Hornillos1, Renato a Dupke4, Txitxo Benitez2, Keith Taylor3

Institution(s): 1. CEFCA, 2. IAA, 3. IAG/USP, 4. ON

The Javalambre Survey Telescope (JST/T250) is a 2.55m Richey-Chretien, alt-azimuthal telescope with a field of view of diameter 3 deg and an effective etendue of 26.5 m2deg2 operated by the Centro de Estudios de Física del Cosmos de Aragón (CEFCA) at the Observatorio Astrofísico de Javalambre (OAJ). JST/T250 is particularly conceived and defined for carrying out large sky multi-filter surveys, like J-PAS (http://j-pas.org), which will be the main survey to be conducted during the first years of operation. To guarantee a seeing limited image quality all over the ~0.5m diameter focal plane, JST/T250 hosts state-of-the-arte optics, including complex hyperbolic M1 and M2 mirrors and a challenging field corrector of three lenses with 4 aspherical surfaces and high slopes. The optical configuration ends up with the powered entrance window of JPCam, the panoramic camera for J-PAS, with ~1200Mpix in a mosaic of 14 large format CCDs of 9.2k x 9.2k, and a set of 56 narrow-band, contiguous, optical filters. In this poster we present a detailed view of the telescope configuration, its optical performance and the expected operation for the J-PAS survey execution.