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Summary

TARSIS (Tetra-ARm Super-Ifu Spectrograph) is a new instrument proposed for the CAHA 3.5m

We propose the design and construction of TARSIS, a new wide-FoV, blue-optimized, intermediate-resolution Integral Field Spectrograph (IFS). This will be a unique instrument that is able to explore large areas of the sky in blind spectroscopy reaching relatively unexplored wavelengths as blue as 320 nm and until 810 nm.

TARSIS logo
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The Consortium

UCM, IAA-CSIC (co-PIs), INAOE, UGR, US, UAL, CAB, Fractal SLNE

TARSIS Institutions: Universidad Complutense de Madrid, Instituto de Astrofísica de Andalucía (CSIC), Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE, Mexico), Universidad de Granada, Universidad de Sevilla, Universidad de Almería, Centro de Astrobiología (INTA-CSIC), Fractal SLNE.

Opto-mechanical design
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The Instrument

TARSIS, a unique instrument and the niche for the Calar Alto Observatory 3.5m

The requirements for the TARSIS instrument are drawn from scientific top-level requirements. In order to achieve them, the TARSIS instrument relies on the replication of 3 high-efficiency, all-refractive, VPH-based, blue-optimized (320-520nm) spectrographs and 1 red-optimized one (510-810nm) based on that developed for MEGARA at GTC. Thus, TARSIS is composed by its focal-plane optics and 4 wavelength-optimized spectrographs & CCDs.

 

TARSIS at Cassegrain

CATARSIS will carry out a magnitude limited (mAB<22.0) spectroscopic survey over an area of 1.7 deg2 with a spectral resolution ranging from R~1000 and a wavelength coverage from 320-810 nm. The fields are chosen to target clusters of galaxies at z~0.15-0.23 up to the infall region and the filaments joining them. We aim at collecting galaxy spectra with high-enough S/N to undertake a detailed analysis of their star formation histories, stellar and nebular abundances, cluster dynamics, etc. The redshift has been chosen so the rest-frame spectra (~278-700 nm) includes the NUV region, essential for detailed analysis of stellar populations, as well as Hα and [NII], needed to cover our science goals. More information on the CATARSIS webpage.

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CATARSIS sample

CATARSIS (Calar Alto “Tetra-ARmed Super-Ifu spectrograph” Survey) sample of galaxy clusters. Click on the cluster name to download the layout of the TARSIS pointing on each specific pointing. This is the (master) sample as selected for the Feasibility Study and Conceptual Design phases.

CATARSIS clusters sample

Cluster Name Layout RA J2000 (deg) Dec J2000 (deg) z r200 (Mpc) 𝜎r200 (Mpc) M200 (1E14 M⨀) 𝜎M200 (1E14 M⨀) N pointings
1 CTRS01 6.136 33.207155 0.225 1.40 0.05 - - 61
2 CTRS02 10.961 20.66666 0.195 1.40 0.05 - - 89
3 CTRS03 234.909833 34.420325 0.229 1.42 0.08 4.11 0.72 61
4 CTRS04 130.73837 36.362939 0.281 1.61 0.32 6.31 4.58 53
5 CTRS05 119.263401 38.682673 0.217 1.26 0.01 2.83 0.07 60
6 CTRS06 120.237028 36.05125 0.287 1.84 0.13 9.51 2.12 69
7 CTRS07 126.7299 31.144267 0.209 1.83 0.04 8.62 0.55 105
8 CTRS08 114.334703 35.284689 0.211 1.42 0.08 4.00 0.75 69
9 CTRS09 135.155989 20.891245 0.234 1.27 0.03 2.96 0.21 61
10 CTRS10 139.47443 51.736714 0.217 1.99 0.01 11.15 0.16 125
11 CTRS11 154.280519 39.04335 0.204 1.60 0.01 5.71 0.09 85
12 CTRS12 130.720895 29.466074 0.194 1.43 0.04 4.02 0.37 85
13 CTRS13 148.216677 51.876974 0.216 1.22 0.13 2.57 0.92 61
14 CTRS14 129.352156 14.967205 0.279 1.13 0.02 2.19 0.14 33
15 CTRS15 168.218175 13.420219 0.167 1.41 0.01 3.76 0.16 97
16 CTRS16 168.321766 17.585679 0.171 1.05 0.05 1.55 0.24 53
17 CTRS17 207.272125 49.322728 0.168 1.02 0.02 1.43 0.06 53
18 CTRS18 179.322327 33.621622 0.214 1.55 0.01 5.22 0.11 81
19 CTRS19 351.609477 29.350852 0.227 1.53 0.03 5.13 0.27 81
20 CTRS20 196.697043 46.551045 0.227 1.82 0.01 8.67 0.07 105
21 CTRS21 111.777535 38.800759 0.208 1.33 0.01 3.32 0.07 61
22 CTRS22 215.51693 37.286547 0.162 1.35 0.06 3.28 0.47 89
23 CTRS23 344.95589 31.037353 0.194 1.38 0.01 3.65 0.05 81
24 CTRS24 224.338189 22.36535 0.257 1.89 0.01 9.90 0.19 81
25 CTRS25 117.815192 17.657242 0.186 1.21 0.03 2.42 0.17 61
26 CTRS26 127.691037 32.455997 0.255 0.94 0.08 1.23 0.33 33
27 CTRS27 17.079815 27.96756 0.239 1.15 0.01 2.21 0.04 33
28 CTRS28 12.762635 26.300367 0.245 1.43 0.01 4.24 0.11 61
29 CTRS29 203.155939 50.555504 0.276 1.28 0.22 3.16 1.95 33
30 CTRS30 246.066754 41.240013 0.183 1.09 0.06 1.77 0.30 61
31 CTRS31 260.613006 32.132505 0.224 1.37 0.22 3.69 2.07 53
32 CTRS32 128.760119 20.781122 0.177 1.33 0.20 3.16 0.03 77
33 CTRS33 357.659395 29.471517 0.154 1.01 0.05 1.38 0.19 61
Average numbers 0.216 1.39 0.06 4.29 0.57 69

CATARSIS clusters (golden) sample

Cluster Name Layout RA J2000 (deg) Dec J2000 (deg) z r200 (Mpc) 𝜎r200 (Mpc) M200 (1E14 M⨀) 𝜎M200 (1E14 M⨀) N pointings
1 CTRS01 6.136 33.207155 0.225 1.40 0.05 - - 61
2 CTRS02 10.961 20.66666 0.195 1.40 0.05 - - 89
3 CTRS03 234.909833 34.420325 0.229 1.42 0.08 4.11 0.72 61
6 CTRS06 120.237028 36.05125 0.287 1.84 0.13 9.51 2.12 69
8 CTRS08 114.334703 35.284689 0.211 1.42 0.08 4.00 0.75 69
9 CTRS09 135.155989 20.891245 0.234 1.27 0.03 2.96 0.21 61
14 CTRS14 129.352156 14.967205 0.279 1.13 0.02 2.19 0.14 33
18 CTRS18 179.322327 33.621622 0.214 1.55 0.01 5.22 0.11 81
19 CTRS19 351.609477 29.350852 0.227 1.53 0.03 5.13 0.27 81
24 CTRS24 224.338189 22.36535 0.257 1.89 0.01 9.90 0.19 81
25 CTRS25 117.815192 17.657242 0.186 1.21 0.03 2.42 0.17 61
27 CTRS27 17.079815 27.96756 0.239 1.15 0.01 2.21 0.04 33
29 CTRS29 203.155939 50.555504 0.276 1.28 0.22 3.16 1.95 33
31 CTRS31 260.613006 32.132505 0.224 1.37 0.22 3.69 2.07 53
32 CTRS32 128.760119 20.781122 0.177 1.33 0.20 3.16 0.03 77
33 CTRS33 357.659395 29.471517 0.154 1.01 0.05 1.38 0.19 61
Average numbers 0.226 1.39 0.08 4.22 0.64 63

The list of CATARSIS clusters will be updated as part of the Preliminary Design phase.

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The Team

A project led by the TARSIS Consortium: UCM, IAA (CSIC), INAOE, CAB (INTA-CSIC), the Universities of Granada (UGR), Sevilla (US) and Almería, and Fractal company.

Science Team: The project Science Team includes scientists from all TARSIS Consortium institutions and from other Spanish and foreign research institutions and Universities, mainly members of the CATARSIS Survey team but also part of the “Galactic & Local-Group”, “Solar system” and “ToO” Advisory Groups (AGs). Our science team at-large is composed by Á. Álvarez-Candal (U. Alicante), Y. Ascasibar (UAM), N. Cardiel (UCM), A. Carramiñana (INAOE), E. Carrasco (INAOE), A. Castillo-Morales (UCM), C. Catalán Torrecilla (UCM), S, Duarte Puertas (UGR), R. Duffard (IAA), A. Ferré Mateu (UB), L. Galbany (UGR), J. Gallego (UCM), M. García (CAB), M. L. García Vargas (Fractal), A. Gil de Paz (UCM), M. A. Gómez-Flechoso (UCM), J. Gorgas (UCM), M. Guerrero (IAA), A. Herrero (IAC), J. Iglesias (IAA), A. Labiano (CAB), A. de Lorenzo-Cáceres (UCM), C. Kehrig (IAA), J. Maíz-Apellániz (CAB), M. Mas (CAB), D. Mayya (INAOE), J. Mendez Abreu (IAC), A. Montaña (INAOE), R. Mújica (INAOE), E. de Oña Wihelmi (ICE), J. Oñorbe (US), S. Pascual (UCM), P. G. Pérez-González (CAB), E. Pérez-Montero (IAA), J. Piqueras (CAB), M. Relaño (UGR), S. Roca-Fàbrega (UCM), D. Rosa (INAOE), S. Sánchez (UNAM), P. Sánchez-Blázquez (UCM), D. Sobral (Lancaster University), E. Terlevich (INAOE), R. Terlevich (INAOE), A. Vazdekis (IAC), J. M. Vílchez (IAA), E. Villaver (CAB), J. Zamorano (UCM), A. Zurita (UGR).

Instrument Team (roles): M. García Vargas (Project Manager), A. Pérez (System Engineer), E. Carrasco (Spectrographs optics leader), R. Izazaga (Optics lab manager), E. Sánchez (Optical Designer), M. Maldonado (Mechanical Engineer), J. Iglesias (Instrument Control System & Outreach and communication), J. Oñorbe (on-site UV tests), N. Cardiel (Scientific Software lead), A. Sánchez (Purchase manager). The ambitious goals of the Scientific Software work-package (WP) are distributed among the following sub-WP leaders: A. Labiano (Simulator), S. Pascual (Data Processing), A. Castillo (Post-Processing), C. Kehrig (Quality Control), V. González (HPC), J. Piqueras (Storage), M. Relaño (CATARSIS tools).

TARSIS management structure