Emission line galaxies behind the planetary nebula IC 5148: Potential for a serendipity survey with archival data

S. Kimeswenger, D. Barria, W. Kausch +1

During the start of a survey program using FORS2 long slit spectroscopy on planetary nebulae (PN) and their haloes, we serendipitously discovered six background emission line galax…