X-ray spectroscopy of the Compton-thick Seyfert 2 ESO 138 − G1 E. Piconcelli, S. Bianchi, C. Vignali, E. Jiménez-Bailón and F. Fiore A&A, 534 (2011) A126 Published online: 19 October 2011 DOI: 10.1051/0004-6361/201117462