RT Conference Proceedings T1 TARSIS, the 8 arcmin2 IFU for the Calar Alto 3.5m telescope A1 Gil De Paz, Armando A1 Iglesias-Páramo, J. A1 Carrasco, E. A1 Gallego Maestro, Jesús A1 Varga, M. L. García A1 Hernández, L. A1 Garzón, G. E. Martín A1 Oñorbe, J. A1 López, J. Piqueras A1 Vílchez, J. M. A1 Sánchez Blázquez, Patricia A1 Kehrig, C. B. A1 Montaña, A. A1 Montenegro Montes, Francisco Miguel A1 Pérez-Calpena, A. A1 Tulloch, S. A1 Abril, M. A1 Pascual Ramírez, Sergio A1 Cardiel López, Nicolás A1 Castillo Morales, María África A1 Jiménez-Teja, Y. A1 Ruíz, V. González A1 Medialdea, D. Pérez A1 Calvo-Ortega, R. A1 Páez, G. AB TARSIS (Tetra-Armed Super-Ifu Spectrograph) is a wide-field IFU with an 8-arcmin2 FoV that has been already adopted by the Calar Alto Observatory (CAHA) for its 3.5m telescope and is currently under preliminary design phase. TARSIS makes use of image-slicers to cover its FoV than feed four spectrographs yielding a spectral resolution of R~1000 in the range between 320-520nm (three spectrographs/quadrants/arms) and 510-810nm (one spectrograph/quadrant/arms) with a spaxel size of ~2x2 arcsec2. The scientific objective of TARSIS is to carry out the CATARSIS survey, a blind-spectroscopic mapping of 16 galaxy clusters in the range 0.15 < z < 0.23 up to their virial radii that will make use of all available dark time at the CAHA 3.5m for six years. CATARSIS will start as soon as TARSIS is available at the telescope, which is estimated for 2028. YR 2024 FD 2024-06 LK https://hdl.handle.net/20.500.14352/118152 UL https://hdl.handle.net/20.500.14352/118152 LA eng NO Gil De Paz, A., Iglesias-Páramo, J., Carrasco Licea, E., Gallego Maestro, J., García-Vargas, M. L., Hernández, L., Martín Garzón, G. E., Oñorbe, J., Piqueras, J., Vílchez, J. M., Sánchez-Blázquez, P., Kehrig, C., Montaña, A., Montenegro-Montes, F. M., Pérez-Calpena, A., Tulloch, S., Abril, M., Pascual, S., Cardiel, N., et al., “TARSIS, the 8 arcmin^2 IFU for the Calar Alto 3.5m telescope,” Ground-based and Airborne Instrumentation for Astronomy X, J. R. Vernet, J. J. Bryant, and K. Motohara, Eds., 72, SPIE, Yokohama, Japan (2024). NO Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 1309620 (2024) https://doi.org/10.1117/12.3016123Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan"UCM María Zambrano program of the Spanish Ministerio de Universidades supported by Next Generation European funds." NO Observatorio de Calar Alto (Almería) NO Ministerio de Ciencia, Innovación y Universidades (España) NO European Commission NO Universidad Complutense de Madrid DS Docta Complutense RD 7 abr 2025