Testing the Sensitivity of the Galactic Center Excess to the Point Source Mask

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Article number231103
Journal / PublicationPhysical Review Letters
Volume124
Issue number23
Online published12 Jun 2020
Publication statusPublished - 12 Jun 2020
Externally publishedYes

Abstract

The Fermi Large Area Telescope (Fermi-LAT) Collaboration has an updated point source catalog, referred to as 4FGL. We perform the first template fit using a mask based on this new catalog and find that the excess in gamma rays detected at the Galactic Center in Fermi-LAT data persists. On the other hand, we find that a search for point sources is highly sensitive to the use of the 4FGL catalog: no sizable excess of bright pixels is apparent in the inner Galaxy when we mask out 4FGL point sources. Combining these observations restricts the ability of point sources to contribute to the Galactic Center excess. After identifying which bright sources have no known counterpart, we place strong constraints on any point source luminosity function capable of explaining the smooth emission identified in the template fit. © 2020 American Physical Society.

Citation Format(s)

Testing the Sensitivity of the Galactic Center Excess to the Point Source Mask. / Zhong, Yi-Ming; McDermott, Samuel D.; Cholis, Ilias et al.
In: Physical Review Letters, Vol. 124, No. 23, 231103, 12.06.2020.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review