ExoMol molecular line lists -- XLII: Rovibronic molecular line list for the low-lying states of NO

An accurate line list, called XABC, is computed for nitric oxide which covers its pure rotational, vibrational and rovibronic spectra. A mixture of empirical and theoretical electronic transition dipole moments are used for the final calculation of $^{14}mathrm{N}^{16}mathrm{O}$ rovibronic $mathrm{A},^2Sigma^+$ -- $mathrm{X},^2Pi$, $mathrm{B},^2Pi$ -- $mathrm{X}^2Pi$ and $mathrm{C},^2Pi$ -- $mathrm{X},^2Pi$ which correspond to the $gamma$, $beta$ and $delta$ band systems, respectively, as well as minor improvements to transitions within the $mathrm{X},^2Pi$ ground state. The work is a major update of the ExoMol NOname line list. It provides a high-accuracy NO ultraviolet line list covering the complicated regions where the $mathrm{B},^2Pi$-$mathrm{C},^2Pi$ states interact. XABC provides comprehensive data for the lowest four doublet states of NO in the region of $lambda > 160 ~ mathrm{nm}$ ($tilde{ u} < 63~000~mathrm{cm}^{-1}$) for the analysis of atmospheric NO on Earth, Venus or Mars, other astronomical observations and applications. The data is available via www.exomol.com.