767 citations · 5k across the 55 of their papers we have counts for
55 papers
NuSTAR observations of Mrk 766: distinguishing reflection from absorption
D. J. K. Buisson, M. L. Parker, E. Kara +14
We present two new NuSTAR observations of the narrow line Seyfert 1 (NLS1) galaxy Mrk 766 and give constraints on the two scenarios previously proposed to explain its spectrum and…
A Long Look At MCG-5-23-16 With NuSTAR: I- Relativistic Reflection And Coronal Properties
Abderahmen Zoghbi, G. Matt, J. M. Miller +13
MCG-5-23-16 was targeted in early 2015 with a half mega-seconds observing campaign using NuSTAR. Here we present the spectral analysis of these datasets along with an earlier obser…
The NuSTAR Serendipitous Survey: The 40 month Catalog and the Properties of the Distant High Energy X-ray Source Population
G. B. Lansbury, D. Stern, J. Aird +35
We present the first full catalog and science results for the NuSTAR serendipitous survey. The catalog incorporates data taken during the first 40 months of NuSTAR operation, which…
IC 3639 - A new bona fide Compton thick AGN unveiled by NuSTAR
Peter G. Boorman, P. Gandhi, D. Alexander +19
We analyse high-quality NuSTAR observations of the local (z = 0.011) Seyfert 2 active galactic nucleus (AGN) IC 3639, in conjunction with archival Suzaku and Chandra data. This pro…
NuSTAR observations of WISE J1036+0449, a Galaxy at z obscured by hot dust
C. Ricci, R. J. Assef, D. Stern +34
Hot, Dust-Obscured Galaxies (Hot DOGs), selected from the WISE all sky infrared survey, host some of the most powerful Active Galactic Nuclei (AGN) known, and might represent an im…
The Phoenix galaxy as seen by NuSTAR
A. Masini, A. Comastri, S. Puccetti +18
Aims. We study the long-term variability of the well-known Seyfert 2 galaxy Mrk 1210 (a.k.a. UGC 4203, or the Phoenix galaxy). Methods. The source was observed by many X-ray facili…
Hard X-ray Emission from Sh2-104: A NuSTAR search for Gamma-ray Counterparts
E. V. Gotthelf, K. Mori, E. Aliu +11
We present NuSTAR hard X-ray observations of Sh 2-104, a compact HII region containing several young massive stellar clusters (YMSCs). We have detected distinct hard X-ray sources…
The weak neutral Fe fluorescence line and long-term X-ray evolution of the Compton-thick AGN in NGC 7674
P. Gandhi, A. Annuar, G. B. Lansbury +26
We present X-ray observations of the active galactic nucleus (AGN) in NGC 7674. The source shows a flat X-ray spectrum, suggesting that it is obscured by Compton-thick gas…
Spectro-timing study of GX 339-4 in a hard intermediate state
F. Fuerst, V. Grinberg, J. A. Tomsick +16
We present an analysis of NuSTAR observations of a hard intermediate state of the transient black hole GX 339-4 taken in January 2015. As the source softened significantly over the…
NuSTAR, Swift, and GROND observations of the flaring MeV blazar: PMN J06410320
M. Ajello, G. Ghisellini, V. S. Paliya +19
MeV blazars are a sub--population of the blazar family, exhibiting larger--than--average jet powers, accretion luminosities and black hole masses. Because of their extremely hard X…
NuSTAR observations of water megamaser AGN
A. Masini, A. Comastri, M. Baloković +18
Aims. Study the connection between the masing disk and obscuring torus in Seyfert 2 galaxies. Methods. We present a uniform X-ray spectral analysis of the high energy properties of…
Multiwavelength Study of Quiescent States of Mrk 421 with Unprecedented Hard X-Ray Coverage Provided by NuSTAR in 2013
M. Baloković, D. Paneque, G. Madejski +305
We present coordinated multiwavelength observations of the bright, nearby BL Lac object Mrk 421 taken in 2013 January-March, involving GASP-WEBT, Swift, NuSTAR, Fermi-LAT, MAGIC, V…
The NuSTAR view of reflection and absorption in NGC 7582
E. Rivers, M. Baloković, P. Arévalo +14
NGC 7582 is a well-studied X-ray bright Seyfert 2 with moderately heavy (~cm), highly variable absorption and strong reflection spectral fea…
The NuSTAR Extragalactic Surveys: The Number Counts of Active Galactic Nuclei and the Resolved Fraction of the Cosmic X-ray Background
F. A. Harrison, J. Aird, F. Civano +41
We present the 3-8 keV and 8-24 keV number counts of active galactic nuclei (AGN) identified in the NuSTAR extragalactic surveys. NuSTAR has now resolved 33-39% of the X-ray backgr…
Extremes of the jet-accretion power relation of blazars, as explored by NuSTAR
T. Sbarrato, G. Ghisellini, G. Tagliaferri +9
Hard X-ray observations are crucial to study the non-thermal jet emission from high-redshift, powerful blazars. We observed two bright z>2 flat spectrum radio quasars (FSRQs) in ha…
A Soft X-Ray Spectral Episode for the Clocked Burster, GS 1826-24 as Measured by Swift and NuSTAR
J. Chenevez, D. K. Galloway, J. J. M. in 't Zand +12
We report on NuSTAR and Swift observations of a soft state of the neutron star low-mass X-ray binary GS 1826-24, commonly known as the "clocked" burster. The transition to the soft…
Dark matter line emission constraints from NuSTAR observations of the Bullet Cluster
S. Riemer-Sørensen, D. Wik, G. Madejski +10
Line emission from dark matter is well motivated for some candidates e.g. sterile neutrinos. We present the first search for dark matter line emission in the 3-80keV range in a poi…
NuSTAR and Suzaku observations of the hard state in Cygnus X-1: locating the inner accretion disk
M. L. Parker, J. A. Tomsick, J. M. Miller +20
We present simultaneous Nuclear Spectroscopic Telescope Array (NuSTAR ) and Suzaku observations of the X-ray binary Cygnus X-1 in the hard state. This is the first time this state…
Coronal Properties of the Seyfert 1.9 Galaxy MCG -05-23-016 Determined from Hard X-ray Spectroscopy with NuSTAR
M. Baloković, G. Matt, F. A. Harrison +15
Measurements of the high-energy cut-off in the coronal continuum of active galactic nuclei have long been elusive for all but a small number of the brightest examples. We present a…
The hard X-ray spectrum of NGC 5506 as seen by NuSTAR
G. Matt, M. Balokovic, A. Marinucci +12
NuSTAR observed the bright Compton-thin, narrow line Seyfert 1 galaxy, NGC 5506, for about 56 ks. In agreement with past observations, the spectrum is well fit by a power law with…
A Focused, Hard X-ray Look at Arp 299 with NuSTAR
A. Ptak, A. Hornschemeier, A. Zezas +19
We report on simultaneous observations of the local starburst system Arp 299 with NuSTAR and Chandra, which provides the first resolved images of this galaxy up to energies of ~ 45…
New Constraints on the Black Hole Low/Hard State Inner Accretion Flow with NuSTAR
J. M. Miller, J. A. Tomsick, M. Bachetti +12
We report on an observation of the Galactic black hole candidate GRS 1739-278 during its 2014 outburst, obtained with NuSTAR. The source was captured at the peak of a rising "low/h…
Spatially Resolving a Starburst Galaxy at Hard X-ray Energies: NuSTAR, Chandra, AND VLBA Observations of NGC 253
Daniel R. Wik, Bret D. Lehmer, Ann E. Hornschemeier +16
Prior to the launch of NuSTAR, it was not feasible to spatially resolve the hard (E > 10 keV) emission from galaxies beyond the Local Group. The combined NuSTAR dataset, comprised…
A NuSTAR observation of the center of the Coma Cluster
F. Gastaldello, D. R. Wik, S. Molendi +13
We present the results of a 55ks NuSTAR observation of the core of the Coma Cluster. The global spectrum can be explained by thermal gas emission, with a conservative 90% upper lim…