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Title:
Prospects for Terahertz Radio Astronomy from Northern Chile
Authors:
Blundell, R.; Barrett, J. W.; Gibson, H.; Gottleib, C.; Hunter, T. R.; Kimberk, R.; Leiker, S.; Marrone, D.; Meledin, D.; Paine, S.; Papa, D. C.; Plante, R. G.; Riddle, P.; Smith, M. J.; Sridharan, T. K.; Tong, C.-Y. E.; Wilson, R. W.; Diaz, M.; Bronfman, L.; May, J.; Otarola, A.; Radford, S. J. E.
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AB(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AC(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AD(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AE(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AF(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AG(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AH(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AI(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AJ(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AK(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AL(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AM(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AN(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AO(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AP(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AQ(Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA) AR(Universidad de Chile) AS(European Southern Observatory) AT(National Radio Astronomy Observatory)
Publication:
Thirteenth International Symposium on Space Terahertz Technology, p. 159-166
Publication Date:
03/2002
Origin:
AUTHOR
Bibliographic Code:
2002stt..conf..159B

Abstract

The terahertz (THz) frequency range (1-3 THz, or 100-300 μm wavelength) provides an important window on the far-infrared Universe. Recent studies of the transmission spectrum of Earth's atmosphere reveal that windows centered at 1.03 THz, 1.3 THz, and 1.5 THz become significantly transparent from high altitude (> 5000m) sites in northern Chile. We are currently building a small radio telescope antenna in order to assess the feasibility of ground-based THz astronomy. The antenna, an 800 mm diameter paraboloid, has a surface accuracy of 3 μm rms and a beam width of about 1 arcminute at 1.5 THz. It will be coupled to HEB receivers, also under development at SAO. Initial astronomical tests will be carried out in the 850 GHz and 1.03 THz atmospheric windows. Receivers for the two higher frequency bands are currently under development and are expected to be deployed towards the end of 2002.

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