The Facility Infrared Spectrapolarimeter (FIRS) for the Dunn Solar Telescope is an advanced imaging spectropolarimeter developed by the Institute for Astronomy - University of Hawai'i (P.I. Haosheng Lin) and the National Solar Observatory. This instrument provides simultaneous spectral coverage at visible and infrared wavelengths through the use of a unique dual-armed spectrograph design. The geometry of the spectrograph has been specially designed to capture the Fe I 6302 Å and 15648 Å lines with maximum efficiency. In addition, the spectrograph operates in a multiple slit mode. By using narrow band filters, the spectra from four consecutive slit positions can be imaged at once on the same detector. This feature greatly reduces the time necessary to scan across a large area on the sun, making it an ideal instrument for the study of quickly developing active regions.
This project is supported by the National Science Foundation Major Research Program, Award No. ATM-0421582.
A more detailed description of FIRS
Examples of data from FIRS
FIRS User's Manual
FIRS data reduction software archive
S. A. Jaeggli & H. Lin, FIRS: A New Instrument for Multi-Wavelength Spectropolarimetry, the First Vector Magnetogram Comparison Group Meeting, October 2009, NSO/Tucson
S. A. Jaeggli, H. Lin, D. L. Mickey, J. R. Kuhn, S. L. Hegwer, T. R. Rimmele, & M. J. Penn, FIRS: A New Instrument for Photospheric and Chromospheric Studies the the Dunn Solar Telescope, NSO Workshop #25, September 2009, Sacramento Peak
S. A. Jaeggli, H. Lin, D. L. Mickey, J. R. Kuhn, S. L. Hegwer, T. R. Rimmele, & M. J. Penn, The Facility Infrared Spectrometer for the Dunn Solar Telescope, AGU Summer 2008 Meeting, Ft. Lauderdale
S. Jaeggli, H. Lin, and H. Uitenbroek, Molecule Formation and Magnetic Field Evolution in Sunspots, The 6th Solar Polarization Workshop, Ka'anapali, June 2010
T. Schad, S. Jaeggli, H. Lin, and M. Penn, He I Triplet Spectropolarimetry: Observations of the Chromospheric Velocity and Magnetic Field Structure of Active Regions, The 6th Solar Polarization Workshop, Ka'anapali, June 2010
For more information please contact:
Haosheng Lin or Sarah Jaeggli