1997/05/01 by D. E. Osterbrock, Donald E. Osterbrock, J. P. Fulbright +1
Physics and Astronomy · #Astronomy and Astrophysical Research #Stellar, planetary, and galactic studies #Adaptive optics and wavefront sensing
paper · pdf · doi:10.1086/133920
ABSTRACT The potential of night-sky emission lines recorded on every long-exposure astronomical spectrum, for wavelength calibration, is reemphasized. The previously published high-resolution atlas, based on spectra obtained with the Keck 10-meter telescope on Mauna Kea and the HIRES high-resolution echelle spectrograph, is extended from 9000 Å to 10600 Å, the present effective long-wavelength limit for reasonable exposure times with current CCD's. The extension of the atlas shows many OH night-sky lines, and makes it possible to identify them easily on high-resolution spectra. Accurate wavelengths and references to their sources are given. Measured intensity ratios for the resolved, well measured lambda-type doublets are presented, and the probable errors in the listed wavelengths of the unresolved doublets, based on them, are discussed. Observations and identifications of a number of lines of weak satellite or intecombination bands of OH in the night-sky spectrum are discussed, and the "not proven" result of a search for OH lines in the (10 - 5) and (10 - 4) bands is mentione.