Southern spectrophotometric standards, 2

Details Southern spectrophotometric standards, 2 Southern spectrophotometric standards, 2

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasp..106..566h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 106, no. 700, p. 566-589

Statistics

Computation

361

Astronomical Photometry, Calibrating, Flux Density, Infrared Spectra, Southern Hemisphere, Spectrophotometry, Visible Spectrum, Charge Coupled Devices, Computational Grids, Data Reduction, Northern Hemisphere, Spectral Energy Distribution, Spectrographs, Stellar Magnitude, Telescopes, Ultraviolet Spectra

Scientific paper

We have obtained new observations of both secondary and tertiary spectrophotometric standards with the RC spectrographs and CCD cameras on the 1.5-m and 4-m telescopes at Cerro Tololo Inter-American Observatory (CTIO) in the wavelength range 6000-10,500 A. We use the secondary spectrophotometric standards in order to calculate new fluxes for the tertiary standards of Stone and Baldwin (1983), as well as for three stars of the Northern Hemisphere from Stone (1977). We find that the synthetic magnitudes calculated from our spectra through the IKC band agree extremely well with the observed photometry, to better than 1% on average. For the monochromatic fluxes, we find an internal precision better than 0.01 mag blueward of 9000 A, and increasingly larger for longer wavelengths. We present also a fine grid of averaged monochromatic fluxes (at continous steps of 16 A) for the ten secondary standards selected for our program, to be used in the flux calibration of high dispersion spectra. Finally, we provide combined fluxes for all secondary and tertiary standards in the range 3300-10,500 A resulting from the calibration presented here with the one published in Paper I (Hamuy et al. 1992).

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