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Sagittarius A* High Energy X-ray Flare Properties During NuSTAR Monitoring of the Galactic Center from 2012 to 2015
Shuo Zhang, Frederick K. Baganoff, Gabriele Ponti +17
Understanding the origin of the flaring activity from the Galactic center supermassive black hole, Sagittarius A*, is a major scientific goal of the NuSTAR Galactic plane survey ca…
NuSTAR Hard X-ray Survey of the Galactic Center Region II: X-ray Point Sources
JaeSub Hong, Kaya Mori, Charles J. Hailey +41
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…
NuSTAR Hard X-ray Survey of the Galactic Center Region I: Hard X-ray Morphology and Spectroscopy of the Diffuse Emission
Kaya Mori, Charles J. Hailey, Roman Krivonos +35
We present the first sub-arcminute images of the Galactic Center above 10 keV, obtained with NuSTAR. NuSTAR resolves the hard X-ray source IGR J17456-2901 into non-thermal X-ray fi…
Exploring plasma evolution during Sagittarius A* flares
Salome Dibi, Sera Markoff, Renaud Belmont +3
We present a new way of describing the flares from Sgr A* with a self-consistent calculation of the particle distribution. All relevant radiative processes are taken into account i…
Chandra Identification of Two AGN Discovered by INTEGRAL
John A. Tomsick, Roman Krivonos, Farid Rahoui +5
Here, we report on observations of two hard X-ray sources that were originally discovered with the INTEGRAL satellite: IGR J04059+5416 and IGR J08297-4250. We use the Chandra X-ray…
The X-ray Flux Distribution of Sagittarius A* as Seen by Chandra
J. Neilsen, S. Markoff, M. A. Nowak +11
We present a statistical analysis of the X-ray flux distribution of Sgr A* from the Chandra X-ray Observatory's 3 Ms Sgr A* X-ray Visionary Project (XVP) in 2012. Our analysis indi…
NuSTAR observation of a Type I X-ray burst from GRS 1741.9-2853
Nicolas M. Barrière, Roman Krivonos, John A. Tomsick +11
We report on two NuSTAR observations of GRS 1741.9-2853, a faint neutron star low mass X-ray binary burster located 10' away from the Galactic center. NuSTAR detected the source se…
Source identification in the IGR J17448-3232 field: discovery of the Scorpius galaxy cluster
Nicolas M. Barrière, John A. Tomsick, Daniel R. Wik +2
We use a 43-ks XMM-Newton observation to investigate the nature of sources first distinguished by a follow-up Chandra observation of the field surrounding INTEGRAL source IGR J1744…
Initial Results from NuSTAR Observations of the Norma Arm
Arash Bodaghee, John A. Tomsick, Roman Krivonos +12
Results are presented for an initial survey of the Norma Arm gathered with the focusing hard X-ray telescope NuSTAR. The survey covers 0.2 deg of sky area in the 3-79 keV range…
NuSTAR detection of high-energy X-ray emission and rapid variability from Sagittarius A* flares
Nicolas M. Barrière, John A. Tomsick, Frederick K. Baganoff +13
Sagittarius A* harbors the supermassive black hole that lies at the dynamical center of our Galaxy. Sagittarius A* spends most of its time in a low luminosity emission state but fl…
X-ray Spectral Components in the Afterglow of GRB 130925A
Eric C. Bellm, Nicolas M. Barriere, Varun Bhalerao +19
We have identified spectral features in the late-time X-ray afterglow of the unusually long, slow-decaying GRB 130925A using NuSTAR, Swift-XRT, and Chandra. A spectral component in…
SN 2010jl: Optical to hard X-ray observations reveal an explosion embedded in a ten solar mass cocoon
E. O. Ofek, A. Zoglauer, S. E. Boggs +24
(Abridged) Some supernovae (SNe) may be powered by the interaction of the SN ejecta with a large amount of circumstellar matter (CSM). Here we outline a method to measure the mass…
NuSTAR discovery of a 3.76-second transient magnetar near Sagittarius A*
Kaya Mori, Eric V. Gotthelf, Shuo Zhang +20
We report the discovery of 3.76-s pulsations from a new burst source near Sgr A* observed by the NuSTAR Observatory. The strong signal from SGR J1745-29 presents a complex pulse pr…