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First hard X-ray detection of the non-thermal emission around the Arches cluster: morphology and spectral studies with NuSTAR
Roman A. Krivonos, John A. Tomsick, Franz E. Bauer +15
The Arches cluster is a young, densely packed massive star cluster in our Galaxy that shows a high level of star formation activity. The nature of the extended non-thermal X-ray em…
Developing a method for soft gamma-ray Laue lens assembly and calibration
Nicolas M. Barrière, John A. Tomsick, Steven E. Boggs +6
Laue lenses constitute a promising option for concentrating soft gamma rays with a large collection area and reasonable focal lengths. In astronomy they could lead to increased tel…
The 3 Ms Chandra Campaign on Sgr A*: A Census of X-ray Flaring Activity from the Galactic Center
J. Neilsen, M. A. Nowak, C. Gammie +14
Over the last decade, X-ray observations of Sgr A* have revealed a black hole in a deep sleep, punctuated roughly once per day by brief flares. The extreme X-ray faintness of this…
NuSTAR discovery of a luminosity dependent cyclotron line energy in Vela X-1
Felix Fuerst, Katja Pottschmidt, Joern Wilms +13
We present NuSTAR observations of Vela X-1, a persistent, yet highly variable, neutron star high-mass X-ray binary (HMXB). Two observations were taken at similar orbital phases but…
NuSTAR and INTEGRAL observations of a low/hard state of 1E1740.7-2942
Lorenzo Natalucci, John A. Tomsick, Angela Bazzano +19
The microquasar 1E1740.7-2942, also known as the "Great Annihilator", was observed by NuSTAR in the Summer of 2012. We have analyzed in detail two observations taken ~2 weeks apart…
Constraints on the Neutron Star and Inner Accretion Flow in Serpens X-1 Using NuSTAR
J. M. Miller, M. L. Parker, F. Fuerst +17
We report on an observation of the neutron star low-mass X-ray binary Serpens X-1, made with NuSTAR. The extraordinary sensitivity afforded by NuSTAR facilitated the detection of a…
Complete Multiwavelength Evolution of Galactic Black Hole Transients During Outburst Decay I: Conditions for "Compact" Jet Formation
Emrah Kalemci, Tolga Dincer, John A. Tomsick +3
Compact, steady jets are observed in the near infrared and radio bands in the hard state of Galactic black hole transients as their luminosity decreases and the source moves toward…
The Reflection Component from Cygnus X-1 in the Soft State Measured by NuSTAR and Suzaku
John A. Tomsick, Michael A. Nowak, Michael Parker +21
The black hole binary Cygnus X-1 was observed in late-2012 with the Nuclear Spectroscopic Telescope Array (NuSTAR) and Suzaku, providing spectral coverage over the ~1-300 keV range…
Infrared identification of high-mass X-ray binaries discovered by INTEGRAL
Alexis Coleiro, Sylvain Chaty, Juan A. Zurita Heras +2
Since it started observing the sky, the INTEGRAL satellite has discovered new categories of high mass X-ray binaries (HMXB) in our Galaxy. These observations raise important questi…
The smooth cyclotron line in Her X-1 as seen with NuSTAR
Felix Fuerst, Brian W. Grefenstette, Ruediger Staubert +17
Her X-1, one of the brightest and best studied X-ray binaries, shows a cyclotron resonant scattering feature (CRSF) near 37 keV. This makes it an ideal target for detailed study wi…
NuSTAR Spectroscopy of GRS 1915+105: Disk Reflection, Spin, and Connections to Jets
J. M. Miller, M. L. Parker, F. Fuerst +15
We report on the results of spectral fits made to a NuSTAR observation of the black hole GRS 1915+105 in a "plateau" state. This state is of special interest because it is similar…
NuSTAR detection of hard X-ray phase lags from the accreting pulsar GS 0834-430
Hiromasa Miyasaka, Matteo Bachetti, Fiona A. Harrison +18
The NuSTAR hard X-ray telescope observed the transient Be/X-ray binary GS 0834-430 during its 2012 outburst - the first active state of this system observed in the past 19 years. W…
Gamma-ray observations of the microquasars Cygnus X-1, Cygnus X-3, GRS 1915+105, and GX 339-4 with the Fermi Large Area Telescope
Arash Bodaghee, John A. Tomsick, Katja Pottschmidt +3
Detecting gamma-rays from microquasars is a challenging but worthwhile endeavor for understanding particle acceleration, the jet mechanism, and for constraining leptonic/hadronic e…
A Chandra/HETGS Census of X-ray Variability From Sgr A* During 2012
J. Neilsen, M. A. Nowak, C. Gammie +13
We present the first systematic analysis of the X-ray variability of Sgr A* during the Chandra X-ray Observatory's 2012 Sgr A* X-ray Visionary Project (XVP). With 38 High Energy Tr…
Swift and RXTE observations of the black hole transient GX 339-4 in the hard state between outbursts
Ryan Allured, John A. Tomsick, Philip Kaaret +1
We use simultaneous Swift and RXTE observations of the black hole binary GX 339-4 to measure the inner radius of its accretion disk in the hard state down to 0.4% L_{Edd} via model…
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…
Multiwavelength observations of the black hole transient XTE J1752-223 during its 2010 outburst decay
Y. Y. Chun, T. Dinçer, E. Kalemci +6
Galactic black hole transients show many interesting phenomena during outburst decays. We present simultaneous X-ray (RXTE, Swift, and INTEGRAL), and optical/near-infrared (O/NIR)…
Cygnus X-1: shedding light on the spectral variability of a black hole
V. Grinberg, N. Hell, J. Wilms +17
The knowledge of the spectral state of a black hole is essential for the interpretation of data from black holes in terms of their emission models. Based on pointed observations of…
Formation of the compact jets in the black hole GX 339-4
S. Corbel, H. Aussel, J. W. Broderick +14
Galactic black hole binaries produce powerful outflows with emit over almost the entire electromagnetic spectrum. Here, we report the first detection with the Herschel observatory…
Long term variability of Cygnus X-1 V. State definitions with all sky monitors
V. Grinberg, N. Hell, K. Pottschmidt +14
We present a scheme to determine the spectral state of the canonical black hole Cyg X-1 using data from previous and current X-ray all sky monitors (RXTE-ASM, Swift-BAT, MAXI, and…
Identification of 12 High Mass X-Ray Binaries detected by INTEGRAL through NIR photometry and spectroscopy
A. Coleiro, S. Chaty, J. A. Zurita Heras +2
Since it started observing the sky, the INTEGRAL satellite has revealed new categories of High Mass X-ray binaries in our Galaxy. These observations raise important questions on th…
The Supergiant Fast X-ray Transient with the shortest orbital period: Suzaku observes one orbit in IGRJ16479-4514
L. Sidoli, P. Esposito, V. Sguera +6
The eclipsing hard X-ray source IGR J16479-4514 is the Supergiant Fast X-ray Transient (SFXT) with the shortest orbital period (3.32 days). This allowed us to perform a 250 ks long…
The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
Fiona A. Harrison, William W. Craig, Finn E. Christensen +77
The Nuclear Spectroscopic Telescope Array (NuSTAR) mission, launched on 13 June 2012, is the first focusing high-energy X-ray telescope in orbit. NuSTAR operates in the band from 3…