The Swift Deep Galactic Plane Survey (DGPS) Phase I Catalog
Mukai, K.; Troja, E.; Cenko, S. B.; Hailey, C.; Harrison, F.; Stern, D.; Kouveliotou, C.; Kaper, L.; Wijers, R. A. M. J.; Baring, M. G.; van der Horst, A. J.; Wadiasingh, Z.; Kennea, J. A.; Buckley, D. A. H.; Evans, P. A.; O'Connor, B.; Hartmann, D.; Kargaltsev, O.; Yang, H.; Bellm, E.; Woudt, P.; Younes, G.; Göğüş, E.; Beniamini, P.; Hare, J.; Granot, J.; Huppenkothen, D.; Brink, J.; Slane, P. O.; Gorgone, N.; van Kooten, A. J.; Gagnon, S.; Egbo, O. D.
United States, United Kingdom, Israel, South Africa, Turkey, Netherlands, Italy
Abstract
The Swift Deep Galactic Plane Survey (DGPS) is a Swift Key Project consisting of 380 tiled pointings covering ~40 deg2 of the Galactic plane between longitude 10 < ∣l∣ < 30 deg and latitude ∣b∣ < 0.5 deg. Each pointing has a 5 ks exposure, yielding a total of 1.9 Ms spread across the entire survey footprint. Phase I observations were carried out between 2017 March and 2021 May. The survey is complete to depth L X > 1034 erg s-1 to the edge of the Galaxy. The main survey goal is to produce a rich sample of new X-ray sources and transients, while also covering a broad discovery space. Here, we introduce the survey strategy and present a catalog of sources detected during Phase I observations. In total, we identify 928 X-ray sources, of which 348 are unique to our X-ray catalog. We report on the characteristics of sources in our catalog and highlight sources newly classified and published by the DGPS team.