NuSTAR Hard X-ray Survey of the Galactic Center Region II: X-ray Point Sources

Understand

We present the first survey results of hard X-ray point sources in the Galactic Center (GC) region by NuSTAR.

• We have discovered 70 hard (3-79 keV) X-ray point sources in a 0.6 deg^2 region around Sgr A* with a total exposure of 1.7 Ms, and 7 sources in the Sgr B2 field with 300 ks.
• We identify clear Chandra counterparts for 58 NuSTAR sources and assign candidate counterparts for the remaining 19.
• The NuSTAR survey reaches X-ray luminosities of ~4 x and ~8 x 10^32 erg s^-1 at the GC (8 kpc) in the 3-10 and 10-40 keV bands, respectively.