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Proceedings Paper

San Pedro Martir Telescope: Mexican design endeavor
Author(s): Gengis K. Toledo-Ramirez; Vicente Bringas-Rico; Noe Reyes; Jorge Uribe; Aldo Lopez; Carlos Tovar; Xochitl Caballero; Luis Del-Llano; Cesar Martinez; Eduardo Macias; William Lee; Alberto Carramiñana; Michael Richer; Jesús González; Beatriz Sanchez; Diana Lucero; Rogelio Manuel; Jose Segura; Saul Rubio; German Gonzalez; Obed Hernandez; Mary García; Jose Lazaro; Fabian Rosales-Ortega; Joel Herrera; Gerardo Sierra; Hazael Serrano
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Paper Abstract

The Telescopio San Pedro Martir (TSPM) is a new ground-based optical telescope project, with a 6.5 meters honeycomb primary mirror, to be built in the Observatorio Astronomico Nacional on the Sierra San Pedro Martir (OAN-SPM) located in Baja California, Mexico. The OAN-SPM has an altitude of 2830 meters above sea level; it is among the best location for astronomical observation in the world. It is located 1830 m higher than the atmospheric inversion layer with 70% of photometric nights, 80% of spectroscopic nights and a sky brightness up to 22 mag/arcsec2.

The TSPM will be suitable for general science projects intended to improve the knowledge of the universe established on the Official Mexican Program for Science, Technology and Innovation 2014-2018. The telescope efforts are headed by two Mexican institutions in name of the Mexican astronomical community: the Universidad Nacional Autonoma de Mexico and the Instituto Nacional de Astrofisica, Optica y Electronica. The telescope has been financially supported mainly by the Consejo Nacional de Ciencia y Tecnologia (CONACYT). It is under development by Mexican scientists and engineers from the Center for Engineering and Industrial Development. This development is supported by a Mexican-American scientific cooperation, through a partnership with the University of Arizona (UA), and the Smithsonian Astrophysical Observatory (SAO). M3 Engineering and Technology Corporation in charge of enclosure and building design.

The TSPM will be designed to allow flexibility and possible upgrades in order to maximize resources. Its optical and mechanical designs are based upon those of the Magellan and MMT telescopes. The TSPM primary mirror and its cell will be provided by the INAOE and UA. The telescope will be optimized from the near ultraviolet to the near infrared wavelength range (0.35-2.5 m), but will allow observations up to 26μm. The TSPM will initially offer a f/5 Cassegrain focal station. Later, four folded Cassegrain and two Nasmyth focal stations are contemplated, nominally with focal ratios of f/5 and f/11. The concept will allow the use of existing instruments like MMIRS and MEGACAM. Available experience from currently working ground-based telescopes will be integrated with up-to-date technology specially for control and information management systems.

Its mount is the well-known azimuth-elevation configuration. The telescope total mass is estimated in about 245 metric tons, with a total azimuth load of 185 metric tons including around 110 metric tons as the total elevation load. A tracking error lower than 0.03 arcsec RMS is expected under steady wind up to 50 Km/h. An open-loop pointing accuracy between 10 and 2 arcsec is planned. The TSPM is in its design phase. It is the first large optical ground-based telescope to be designed and developed primarily by Mexican scientists and engineers. This endeavor will result in the improvement of the scientific and technical capabilities of Mexico including complex scientific instruments development, systems engineering and project management for large engineering projects. In this paper, which aims to gather the attention of the community for further discussions, we present the engineering preliminary design, the basic architecture and challenging technical endeavors of the TSPM project.

Paper Details

Date Published: 8 August 2016
PDF: 17 pages
Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99060S (8 August 2016); doi: 10.1117/12.2231732
Show Author Affiliations
Gengis K. Toledo-Ramirez, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Vicente Bringas-Rico, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Noe Reyes, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Jorge Uribe, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Aldo Lopez, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Carlos Tovar, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Xochitl Caballero, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Luis Del-Llano, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Cesar Martinez, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Eduardo Macias, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
William Lee, Univ. Nacional Autónoma de México (Mexico)
Alberto Carramiñana, Instituto Nacional de Astrofísica, Óptica, y Electrónica (Mexico)
Michael Richer, Univ. Nacional Autónoma de México (Mexico)
Jesús González, Univ. Nacional Autónoma de México (Mexico)
Beatriz Sanchez, Univ. Nacional Autónoma de México (Mexico)
Diana Lucero, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Rogelio Manuel, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Jose Segura, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Saul Rubio, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
German Gonzalez, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Obed Hernandez, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Mary García, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Jose Lazaro, Ctr. de Ingenieria y Desarrollo Industrial (Mexico)
Fabian Rosales-Ortega, Instituto Nacional de Astrofísica, Óptica, y Electrónica (Mexico)
Joel Herrera, Univ. Nacional Autónoma de México (Mexico)
Gerardo Sierra, Univ. Nacional Autónoma de México (Mexico)
Hazael Serrano, Univ. Nacional Autónoma de México (Mexico)


Published in SPIE Proceedings Vol. 9906:
Ground-based and Airborne Telescopes VI
Helen J. Hall; Roberto Gilmozzi; Heather K. Marshall, Editor(s)

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