Detection of Hα emitters within the IPHAS field of view

I present a list of likely H$\alpha$ emitters among the sources in the INT Photometric H$\alpha$ Survey of the Northern Galactic Plane (IPHAS) field of view. Out of 7373236 objects, 17272 have been highlighted as emitters, in the H$\alpha$ narrow band. For each of these objects, I calculated a significance parameter which provides a quantitative degree of confidence that the given source is a true emitter, with reference to an associated group of similar objects. In this way, future users can choose between applying a more conservative cut rather then opting for completeness, or vice versa. In this study, I used a cross-matched catalog between Gaia DR2 and IPHAS DR2; this provided me with, besides the r, i and H$\alpha$ IPHAS bands, also the Gaia Bp, Rp and M$_G$ colors, along with the distances between the sources and us. I could then build the Bp-Rp VS M$_G$ Color-Magnitude Diagram, which allowed me to identify which population each source most likely belongs to.