SIMBAD references

Effective collision strengths for transitions among the lowest 97 fine-structure levels belonging to the (1s²2s²2p⁶) 3s²3p², 3s3p³, 3s²3p3d, 3p⁴, 3s3p²3d and 3s²3d² configurations of Fe XIII have been calculated using the fully relativistic Dirac Atomic R-matrix Code (DARC) of Norrington & Grant (2004, Comput. Phys. Commun. - in prep.). Resonances have been resolved in the threshold region, and results are reported over a wide electron temperature range up to logT_e=6.8K. Comparisons are made with the earlier available R-matrix results of Gupta & Tayal (1998ApJ...506..464G), and the accuracy of the data is assessed.