Physics – Optics
Scientific paper
May 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.8507v&link_type=abstract
American Astronomical Society, 188th AAS Meeting, #85.07; Bulletin of the American Astronomical Society, Vol. 28, p.962
Physics
Optics
Scientific paper
The SIRTF-Cornell Echelle spectrograph (SCORE) uses the large format (128x128) of modern mid-IR (5-40 mu m) focal plane arrays to dispense with moving parts and collect a spectrum at a resolution of 600 over an octave in wavelength in a single exposure. SCORE's optical bench was constructed to demonstrate the usefulness and reliability of such a spectrograph for SIRTF, operating over the 10 to 20 mu m range. With the addition of cold reimaging optics and the exchange of a grating and a filter, SCORE can operate on a ground-based telescope over the 7.5-14.5 mu m atmospheric window. While the instrument has a small field of view, 1 Airy dark ring diameter in width and 2 in length at 10 mu m, it is much faster at collecting a full spectrum of a point-like source than spectrographs with longer slits which must make many exposures to cover the octave. SCORE also guarantees that the entire spectrum refers to simultaneous conditions in the object observed, an important consideration in observing time-variable phenomena like comets or planetary atmospheres. We present laboratory test data, our plans to observe with SCORE at the Palomar 5 m in the fall, discuss operating conditions and sensitivities, and mention a few science projects for which SCORE is particularly well-suited such as observations of active galactic nuclei and Solar System objects.
Brown Robert J.
Gull George
Houck James R.
van Cleve Jeff
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