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A Cross-Calibration between Tycho-2 Photometry and Hubble Space Telescope Spectrophotometry
Maíz-Apellániz, J.
By analyzing a well-calibrated sample of 256 stars observed with both Hipparcos and HST, I show that Tycho-2 photometry and HST spectrophotometry are accurate and stable enough to obtain a precise cross-calibration. Based on this analysis, I obtain the following photometric zero points with respect to Vega for Tycho-2: 0.020+/-0.001 (BT…
uvby FCAPT Photometry of the Magnetic Chemically Peculiar Stars 36 Aurigae, HR 2722, 13 Andromedae, and HD 220147
Adelman, Saul J.
Differential Strömgren uvby observations obtained with the Four College Automated Photoelectric Telescope (FCAPT) are presented for the magnetic chemically peculiar (mCP) stars 36 Aur, HR 2722, 13 And, and HD 220147. The new data help to better define the light curves. The period for 36 Aur was found to be 14.368 days, close to that for the previo…