\def \apjl{Astrophysical Journal Letters }
\def \apjs{Astrophysical Journal Supplement Series }
\def \apj{Astrophysical Journal }
\def \aaps{Astronomy and Astrophysics Supplement }
\def \apss{Astrophysics and Space Science }
\def \mnras{Monthly Notices of the Royal Astronomical Society }
\def \aap{Astronomy and Astrophysics }
\def \aj{Astronomical Journal }
\def \pasp{Publications of the Astronomical Society of the Pacific }
\def \pasj{Publications of the Astronomical Society of Japan }
\def \ao{Applied Optics }
