Spectrophotometry of Very Bright Stars in the Southern Sky

Abstract

We obtained spectra of 26 bright stars in the southern sky, including Sirius, Canopus, Betelgeuse, Rigel, Bellatrix, and Procyon, using the 1.5-m telescope at Cerro Tololo Inter-American Observatory and its grating spectrograph RCSPEC. A 7.5 magnitude neutral density filter was used to keep from saturating the CCD. Our spectra are tied to a Kurucz model of Sirius with T = 9850 K, log g = 4.30, and [Fe/H] =+0.4. Since Sirius is much less problematic than using Vega as a fundamental calibrator, the synthetic photometry of our stars constitutes a Sirius-based system that could be used as a new anchor for stellar and extragalactic photometric measurements.

arXiv comment29 pages, 11 figures, to be published in the Publications of the Astronomical Society of the Pacific

References in corpus (6)

• The Galactic O-Star Spectroscopic Survey. I. Classification System and Bright Northern Stars in the Blue-Violet at R~2500
• Spectrophotometric Libraries, Revised Photonic Passbands and Zero-points for UBVRI, Hipparcos and Tycho Photometry
• Asteroid Belts in Debris Disk Twins: VEGA and FOMALHAUT
• The Vega Debris Disk -- A Surprise from Spitzer
• An Atlas of Spectrophotometric Landolt Standard Stars
• The CALSPEC Stars P177D and P330E

Cited by in corpus (4)

• Infrared Absolute Calibration I: Comparison of Sirius with Fainter Calibration Stars
• Angular Sizes and Effective Temperatures of O-type Stars from Optical Interferometry with the CHARA Array
• Refined fundamental parameters of Canopus from combined near-IR interferometry and spectral energy distribution
• Inversion of stellar spectral radiative properties based on multiple star catalogues