Luginbuhl has been working at the U. S. Naval Observatory Flagstaff Station (USNOFS) since 1981 on a variety of Station and personal research projects. One of the principle research projects carried out at USNOFS involves precise small-angle astrometry utilizing the 1.55-m astrometric reflector and various detectors, most recently CCD cameras. This work has produced the most precise and voluminous database of trigonometric parallaxes for faint stars available (for the most recent results of this program see Astron. J. 103:638, 1992). Recently the USNOFS has begun investigating the astrometric and photometric capabilities of infrared array technologies. In this area Luginbuhl has been involved in the evaluation of the USNOFS near-IR cameras IRCAM and ASTROCAM, cameras based respectively on a Rockwell NICMOS III HgCdTe 256x256 array and an ALADIN InSb 1024x1024 array developed jointly with NOAO and Santa Barbara Research Corporation. Luginbuhl was instrumental in developing a linearization technique for these arrays based on linear interpolation using a calibration datacube of a series of flat-field exposures, which accurately produces a linear response over the entire useful dynamic range for these devices. The technique, as applied to the IRCAM array, is described in the SPIE Proceedings 2475:88, 1995.
Luginbuhl is actively involved with issues related to dark sky preservation, and was instrumental in the adoption of the innovative Flagstaff and Coconino County (AZ) outdoor lighting codes in 1989. These codes are the first to restrict the amount of light permitted (per acre) in outdoor lighting installations, and are vital to the preservation of dark sky conditions at the Flagstaff observatories (including USNOFS and Lowell Observatory ).
Flagstaff Dark Skies Coalition |
To Celebrate, Promote and Protect
the Dark Skies of Flagstaff and Northern Arizona
Christian B. Luginbuhl / U.S. Naval Observatory Flagstaff Station /
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