Showing 2014 · astro-ph.HEShow all

70 papers · 2 filters

astro-ph.HE2014★ 59 cited

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…

astro-ph.HE2014★ 64 cited

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…

astro-ph.HE2014★ 192 cited

A spectral-timing model for ULXs in the super-critical regime

Matthew Middleton, Lucy Heil, Fabio Pintore +2

Ultraluminous X-ray sources (ULXs) with luminosities lying between ~3x10^{39} - 2x10^{40} erg/s represent a contentious sample of objects as their brightness, together with a lack…

astro-ph.HE2014★ 42 cited

On the Progenitor System of the Type Iax Supernova 2014dt in M61

Ryan J. Foley, Schuyler D. Van Dyk, Saurabh W. Jha +5

We present pre-explosion and post-explosion Hubble Space Telescope images of the Type Iax supernova (SN Iax) 2014dt in M61. After astrometrically aligning these images, we do not d…

astro-ph.HE2014★ 280 cited

A real-time fast radio burst: polarization detection and multiwavelength follow-up

E. Petroff, M. Bailes, E. D. Barr +32

Fast radio bursts (FRBs) are one of the most tantalizing mysteries of the radio sky; their progenitors and origins remain unknown and until now no rapid multiwavelength follow-up o…

astro-ph.HE2014★ 28 cited

The Hard X-Ray View of the Young Supernova Remnant G1.9+0.3

Andreas Zoglauer, Stephen P. Reynolds, Hongjun An +12

NuSTAR observed G1.9+0.3, the youngest known supernova remnant in the Milky Way, for 350 ks and detected emission up to 30 keV. The remnant's X-ray morphology does not change…

astro-ph.HE2014★ 55 cited

NuSTAR and XMM-Newton observations of the extreme ultraluminous X-ray source NGC 5907 ULX1: A Vanishing Act

D. J. Walton, F. A. Harrison, M. Bachetti +15

We present results obtained from two broadband X-ray observations of the extreme ultraluminous X-ray source (ULX) NGC5907 ULX1, known to have a peak X-ray luminosity of ~5e40 erg/s…

astro-ph.HE2014★ 35 cited

The Seyfert 2 galaxy NGC 2110: hard X-ray emission observed by NuSTAR and variability of the iron K line

A. Marinucci, G. Matt, S. Bianchi +16

We present NuSTAR observations of the bright Seyfert 2 galaxy NGC 2110 obtained in 2012, when the source was at the highest flux level ever observed, and in 2013, when the source w…

astro-ph.HE2014★ 38 cited

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…

astro-ph.HE2014★ 69 cited

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…

astro-ph.HE2014★ 58 cited

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…

astro-ph.HE2014★ 154 cited

NuSTAR Spectroscopy of Multi-Component X-ray Reflection from NGC 1068

Franz E. Bauer, Patricia Arevalo, Dominic J. Walton +26

We report on observations of NGC1068 with NuSTAR, which provide the best constraints to date on its ~keV spectral shape. We find no strong variability over the past two decade…

astro-ph.HE2014★ 39 cited

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…

astro-ph.HE2014★ 767 cited

An Ultraluminous X-ray Source Powered by An Accreting Neutron Star

M. Bachetti, F. A. Harrison, D. J. Walton +21

Ultraluminous X-ray sources (ULX) are off-nuclear point sources in nearby galaxies whose X-ray luminosity exceeds the theoretical maximum for spherical infall (the Eddington limit)…

astro-ph.HE2014★ 75 cited

Iron K and Compton hump reverberation in SWIFT J2127.4+5654 and NGC 1365 revealed by NuSTAR and XMM-Newton

E. Kara, A. Zoghbi, A. Marinucci +13

In the past five years, a flurry of X-ray reverberation lag measurements of accreting supermassive black holes have been made using the XMM-Newton telescope in the 0.3-10 keV energ…

astro-ph.HE2014★ 50 cited

First-Epoch VLBA Imaging of Twenty New TeV Blazars

B. Glenn Piner, Philip G. Edwards

We present Very Long Baseline Array (VLBA) images of 20 TeV blazars (HBLs) not previously well-studied on the parsec scale. Observations were made between August and December 2013,…

astro-ph.HE2014★ 113 cited

The hydrogen-poor superluminous supernova iPTF13ajg and its host galaxy in absorption and emission

Paul M. Vreeswijk, Sandra Savaglio, Avishay Gal-Yam +24

We present imaging and spectroscopy of a hydrogen-poor superluminous supernova (SLSN) discovered by the intermediate Palomar Transient Factory: iPTF13ajg. At a redshift of z=0.7403…

astro-ph.HE2014★ 17 cited

The Norma Arm Region Chandra Survey: X-ray Populations in the Spiral Arms

Francesca M. Fornasini, John A. Tomsick, Arash Bodaghee +6

We present a catalog of 1415 X-ray sources identified in the Norma arm region Chandra survey (NARCS), which covers a 2 deg x 0.8 deg region in the direction of the Norma spiral arm…

astro-ph.HE2014★ 36 cited

NuSTAR Discovery of a Cyclotron Line in the Be/X-ray Binary RX J0520.5-6932 During Outburst

Shriharsh P. Tendulkar, Felix Fürst, Katja Pottschmidt +11

We present spectral and timing analysis of NuSTAR observations of RX J0520.56932 in the 3-79 keV band collected during its outburst in January 2014. The target was observed on t…

astro-ph.HE2014★ 118 cited

No Time for Dead Time: Timing analysis of bright black hole binaries with NuSTAR

Matteo Bachetti, Fiona A. Harrison, Rick Cook +20

Timing of high-count rate sources with the NuSTAR Small Explorer Mission requires specialized analysis techniques. NuSTAR was primarily designed for spectroscopic observations of s…

astro-ph.HE2014★ 46 cited

Studies of the Jet in BL Lacertae. II. Superluminal Alfvén Waves

M. H. Cohen, D. L. Meier, T. G. Arshakian +8

We study the kinematics of ridge lines on the pc-scale jet of the active galactic nucleus BL Lac. We show that the ridge lines display transverse patterns that move superluminally…

astro-ph.HE2014★ 112 cited

The NuSTAR View of Nearby Compton-thick AGN: The Cases of NGC 424, NGC 1320 and IC 2560

M. Baloković, A. Comastri, F. A. Harrison +25

We present X-ray spectral analyses for three Seyfert 2 active galactic nuclei, NGC 424, NGC 1320, and IC 2560, observed by NuSTAR in the 3-79 keV band. The high quality hard X-ray…

astro-ph.HE2014★ 58 cited

NuSTAR Reveals the Comptonizing Corona of the Broad-Line Radio Galaxy 3C 382

D. R. Ballantyne, J. M. Bollenbacher, L. W. Brenneman +14

Broad-line radio galaxies (BLRGs) are active galactic nuclei that produce powerful, large-scale radio jets, but appear as Seyfert 1 galaxies in their optical spectra. In the X-ray…

astro-ph.HE2014★ 88 cited

Weak Hard X-ray Emission from Broad Absorption Line Quasars: Evidence for Intrinsic X-ray Weakness

B. Luo, W. N. Brandt, D. M. Alexander +19

We report NuSTAR observations of a sample of six X-ray weak broad absorption line (BAL) quasars. These targets, at z=0.148-1.223, are among the optically brightest and most luminou…