BAT AGN Spectroscopic Survey-III. An observed link between AGN Eddington ratio and narrow emission line ratios
Kyuseok Oh, Kevin Schawinski, Michael Koss, Benny Trakhtenbrot, Isabella Lamperti, Claudio Ricci, Richard Mushotzky, Sylvain Veilleux, Simon Berney, Daniel Crenshaw, Neil Gehrels, Fiona Harrison, Nicola Masetti, Kurt Soto, Daniel Stern, Ezequiel Treister, Yoshihiro Ueda