7.5 TO 13.5 MICRONS Spectral Imaging with an Array Spectrometer
PHILLIPS LAB HANSCOM AFB MA
Pagination or Media Count:
GLADYS is an array slit spectrometer that has been used extensively on the Wyoming IR Observatory 2.3 m telescope. The emphasis has previously been on obtaining spectra of point sources having unusual spectral counterparts in the IRAS Atlas of Low Resolution Spectra. More recently, the replacement of a section of the digital electronics with higher quality, printed circuitry has eliminated low-level glitching, making possible calibrated, extended source observations. The revised electronics also makes for improvements in the quality of extracted one-dimensional spectra. The Red Rectangle HD 44179 is just one example of object for which GLADYS is now particularly well suited. The spectrometers spectral coverage, which extends from wavelengths shortward of 7. 5 microns to wavelengths longward of 13.5 microns, is compatible with the range of useful transmission from the Jelm Mountain site. This spectral region encompasses the peak of the 7.7 microns unidentified emission feature and the continuum longward of the 13 microns emission features seen in the spectra of several long period variable stars e.g., S Draconis, RX Bootis.
- Atomic and Molecular Physics and Spectroscopy