We extend the wavelength coverage of 11 of the KPNO spectrophotometric standard stars out past 1 μm. The internal agreement is better than a few percent, while the external error at longer wavelengths appears to be 5% or better. We note that the well-known standard star BD +28°4211 has a faint red companion.
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science