Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.2210h&link_type=abstract
American Astronomical Society Meeting 205, #22.10; Bulletin of the American Astronomical Society, Vol. 36, p.1379
Astronomy and Astrophysics
Astrophysics
Scientific paper
The Ca II K line and the blend of the Ca II H line with Hɛ are strong indicators of spectral type and are useful in the study of open clusters. Two narrow filters have been fabricated to image separately in the regions of these two lines. The filters are centered at 393.4 nm and 396.9 nm respectively, with each being 3.0 nm wide. We will present two sets of observations; 1) spectroscopic data in the region of Calcium HK over a range of spectral types, and 2) the first photometric images through the new filters.
The spectroscopic observations were taken with the 1.2-m telescope of the Dominion Astrophysical Observatory. While the photometric observations were obtained with the 0.4-m David Derrick telescope of the Orson Pratt Observatory.
The authors would like to acknowledge the support of an AAS Small Research Grant for the purchase of the filters and for travel to DAO. The authors would also like to thank DAO for the use of the 1.2-m telescope.
Hintz Eric G.
Rose Michael B.
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