because of the small redshift difference. Higher resolution images and spatially resolved spectra are required to clarify the nature of this source.

![Spectrum for MQS J050155.46$-$700210.1. It displays two sets of the same emission lines at two redshifts, $z=0.228$ and $z=0.341$. We did not mask the LMC’s ISM lines \[OI\] (6300Å), H$\alpha$ (6563Å), and HeI (6678Å).[]{data-label="fig:doubleAGN"}](MQS_fig6.eps){width="8cm"}

![Finding chart for MQS J050155.46$-$700210.1. The circle has a diameter of 2 arcsec, corresponding to the AAOmega fiber size. The plus symbol inside the fiber marks the targeted source, while the plus symbol outside the fiber marks the galaxy, most likely hosting an AGN. The image is $10 \times 10$ arcsec. North is up, east is to the left.[]{data-label="fig:doubleAGNchart"}](MQS_fig7.eps){width="8cm"}

Contaminants {#sec:contamination}
============

For the sources that were not quasars, we used our spectra of the known sources to build template YSO, PN, blue/Be, and red star spectra, respectively, and fit them to the individual spectra. Apart from the automatic fits, we also visually inspected each spectrum. Table 5 reports the object type for each of the sources and Figure \[fig:contamination\] shows examples of some of these sources. We briefly describe each type below.

[*Planetary nebulae.*]{} We classified sources as candidate PNe if they had 