CCD observations of M67 stars useful as photometric standards

Details CCD observations of M67 stars useful as photometric standards CCD observations of M67 stars useful as photometric standards

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pasp...97..824s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 97, Sept. 1985, p. 824-826.

Other

15

Astronomical Photometry, Charge Coupled Devices, Standardization, Star Clusters, Red Giant Stars, Stellar Magnitude

Scientific paper

New CCD magnitudes at R and I bands on the Kron-Cousins system are presented for 15 stars in M67 to allow a comparison with R,I photometry of other authors. The new results show that previously published CCD photometry for stars in the dipper asterism calibration field of M67 is in agreement with other published photomultiplier photometry. The observations also serve as a test of the usefulness of the new filter sets sold by Kitt Peak National Observatory for UBVRI photometry. It is found that the V and R filters have excellent transmission and satisfactorily small transformation constants. However, the B filter used in conjunction with the thinned RCA CCD detector had a large transformation constant which mitigates against its use in spite of its higher throughput.

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