Weird narrow-line seyfert 1s: A multi-epoch, broadband analysis to study the x-ray emission in mrk 1239 and wkk 4438

Abstract

X-ray emission from Seyfert 1 galaxies has a debated origin. The primary X-ray source is the compact corona, but the secondary X-ray emission is thought to originate from either a Comptonising layer or blurred reflection from the accretion disc. Finding objects that do not fit into this standard framework are important for understanding the class as a whole. We examine broadband, multi-epoch data of two atypical NLS1s, Mrk 1239 and WKK 4438. While both objects are defined as Seyfert 1s based on optical classification, their X-ray emission is poorly understood. We use broadband multi-epoch spectroscopy to model X-ray emission and examine the timing properties of both galaxies. In Mrk 1239 we determine that the spectra are consistent with high absorption and emission from a distant starburst component. In WKK 4438, we discover excess emission above 30 keV, that may point to a jet origin. Blurred reflection and Comptotnisation fail to describe either object indicating the standard paradigm for the X-ray emission cannot be applied universally.