A faint UBVRI sequence in a field near 22 H -19 deg

Physics – Optics

Scientific paper

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Main Sequence Stars, Stellar Spectrophotometry, Ubv Spectra, Cassegrain Optics, Telescopes, Visual Photometry

Scientific paper

Results are reported of photoelectric UBVRI (Kron-Cousins system) stellar photometry in a field near right ascencion 22 hours and declination -19 degrees. The observations were carried out with a variety of telescopes and equipment during the years 1976-1982. This field has been the object of intensive study by a number of investigators, and the sequence has been used to calibrate these investigations. The results are also considered significant because of the lack of reliable faint sequences in uncrowded fields in the southern hemisphere. The range of magnitudes observed is from V = 9.8 to 19.1. A finding chart for the sequence stars and a table of coordinates are included.

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