$z$-bands are 24.5, 24.0, 23.3 and 22.0 (AB, 5$\sigma$ for a point-like object measured in a 2-arcsec aperture). Information about the optical morphology of the objects is included in the full published GS11 catalogue but is not in the SERVS Data Fusion catalogue. We therefore matched the full GS11 catalogue to the Data Fusion catalogue to include this information. A match radius of 1 arcsec was used and all of the objects with optical information in the Data Fusion catalogue have matches to the GS11 catalogue.

UKIDSS [@2007MNRAS.379.1599L] used the UKIRT Wide Field Camera (WFCAM) to map 7500 deg$^2$ in five different surveys in $J$, $H$ and $K$ bands. The Lockman Hole is part of the Deep Extragalactic Survey (DXS), which has a limiting $K$ magnitude of 21 (vega). The Data Fusion catalogue contains data from UKIDSS Data Release 9, which includes only $J$ and $K$ bands in the Lockman Hole.

SWIRE [@2003PASP..115..897L] is a wide-field high galactic latitude survey covering nearly 50 deg$^2$ in six different fields, one of which is the Lockman Hole. These fields have been surveyed by the *Spitzer Space Telescope* using both the Infrared Array Camera (IRAC) and the Multi-Band Imaging Photometer (MIPS) far-infrared camera. 