New telescopes for ground-based solar observations at submillimeter and mid-infrared

Pierre Kaufmann; Hugo Levato; Marta M. Cassiano; Emilia Correia; Joaquim E. R. Costa; C. Guillermo Giménez de Castro; Rodolfo Godoy; Robert K. Kingsley; Jeffrey S. Kingsley; Amauri S. Kudaka; Rogério Marcon; Robert Martin; Adolfo Marun; Arline M. Melo; Pablo Pereyra; Jean-Pierre Raulin; Thomas Rose; Adriana Silva Valio; Achim Walber; Patrick Wallace; Azriel Yakubovich; Maria Beny Zakia

doi:10.1117/12.788889

10 July 2008 New telescopes for ground-based solar observations at submillimeter and mid-infrared

Pierre Kaufmann, Hugo Levato, Marta M. Cassiano, Emilia Correia, Joaquim E. R. Costa, C. Guillermo Giménez de Castro, Rodolfo Godoy, Robert K. Kingsley, Jeffrey S. Kingsley, Amauri S. Kudaka, Rogério Marcon, Robert Martin, Adolfo Marun, Arline M. Melo, Pablo Pereyra, Jean-Pierre Raulin, Thomas Rose, Adriana Silva Valio, Achim Walber, Patrick Wallace, Azriel Yakubovich, Maria Beny Zakia

Author Affiliations +

Proceedings Volume 7012, Ground-based and Airborne Telescopes II; 70120L (2008) https://doi.org/10.1117/12.788889
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

The solar submillimeter-wave telescope (SST) is the only one of its kind dedicated to solar continuous observations. Two radiometers at 0.740 mm (405 GHz), and four at 1.415 mm (212 GHz) are placed in the Cassegrain focal plane of the 1.5-m dish at El Leoncito high altitude site, San Juan, Argentina. The aperture efficiencies are close to design predictions: 20% and 35% for 2 and 4 arcminutes beam sizes at 405 and 212 GHz, respectively. The positioner absolute pointing accuracy is 10 arcseconds. Spectral coverage is complemented by ground-based mid-infrared telescopes developed for high cadence observations in the continuum 10 micron band (30 THz), using small apertures and room-temperature microbolometer cameras. Using the system, a new solar burst spectral component was discovered, exhibiting fluxes increasing for smaller wavelengths, separated from the well known microwave component. Rapid sub-second pulsations are common for all bursts. The pulsations onset times of appear to be connected to the launch times of CMEs. Active regions are brighter for shorter submillimeter-waves. Mid-IR bright regions are found closely associated with calcium plages and magnetic structures near the solar photosphere. Intense and rapid 10 micron brightening was detected on active centers in association with weak flares. These results raise challenging difficulties for interpretation.

Citation Download Citation

Pierre Kaufmann, Hugo Levato, Marta M. Cassiano, Emilia Correia, Joaquim E. R. Costa, C. Guillermo Giménez de Castro, Rodolfo Godoy, Robert K. Kingsley, Jeffrey S. Kingsley, Amauri S. Kudaka, Rogério Marcon, Robert Martin, Adolfo Marun, Arline M. Melo, Pablo Pereyra, Jean-Pierre Raulin, Thomas Rose, Adriana Silva Valio, Achim Walber, Patrick Wallace, Azriel Yakubovich, and Maria Beny Zakia "New telescopes for ground-based solar observations at submillimeter and mid-infrared", Proc. SPIE 7012, Ground-based and Airborne Telescopes II, 70120L (10 July 2008); https://doi.org/10.1117/12.788889

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available