Our current knowledge of the morphology of the extraplanar diffuse ionized gas (eDIG) in normal (non-starburst) edge-on spiral galaxies rests on a few investigations of small galaxy samples (Hoopes et al., 1999; Pildis et al., 1994; Rand, 1996; Rossa & Dettmar, 2000), as well as on some additional studies of individual galaxies (e.g., Dettmar, 1990; Domgörgen & Dettmar, 1997; Rand et al., 1992; Ferguson et al., 1996). There have been a few galaxies studied during the last decade, however, the question was raised, whether or not the presence of eDIG is a common phenomenon among all types of galaxies, or whether it is indeed a direct consequence of the strength of the star formation activity, both on local and global scales (Rand, 1996; Rossa & Dettmar, 2000). To answer this question a systematic investigation is obligatory. We have therefore conducted, for the first time, a large survey of nearby non-starburst edge-on spiral galaxies, aiming at a quantitative morphological study of gaseous halos, based on the broad coverage of the strength of SF activity in the underlying galaxy disks (i.e. broad coverage of LFIR) of these galaxies. We present the observed morphological results, based on the H imaging observations, and describe the derived DIG characteristics for each galaxy in this paper in greater detail. For information on the scientific background on eDIG and its detection in external galaxies we refer the reader to our previous works (Rossa & Dettmar, 2003, 2000), and references therein and to some older review articles (Dettmar, 1992; Dahlem, 1997) for a more detailed overview on this topic.
The current paper is structured as follows. In Sect. 2 we present some details on the observations and data reduction procedures. In Sect. 3 we show the actual results for the galaxies, while in Sect. 4 we discuss the extraplanar dust. Then the atlas is presented (available only electronically at EDP Sciences), where we display two galaxies on each page. Each of the two columns per page consists of the R-band (top), the unsharp-masked R-band (middle), and the continuum subtracted H image (bottom). Finally, in Sect. 5 we summarize briefly the results.