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19912026
Showing 2015 · astro-ph.HEShow all

69 papers · 2 filters

astro-ph.HE2015★ 22 cited

On the Spin of the Black Hole in IC 10 X-1

James F. Steiner, Dominic J. Walton, Javier A. Garcia +5

The compact X-ray source in the eclipsing X-ray binary IC 10 X-1 has reigned for years as ostensibly the most massive stellar-mass black hole, with a mass estimated to be about twi…

astro-ph.HE2015★ 143 cited

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…

astro-ph.HE2015★ 246 cited

Flash Spectroscopy: Emission Lines from the Ionized Circumstellar Material around -Day-Old Type II Supernovae

D. Khazov, O. Yaron, A. Gal-Yam +24

Supernovae (SNe) embedded in dense circumstellar material (CSM) may show prominent emission lines in their early-time spectra ( days after the explosion), owing to recombi…

astro-ph.HE2015★ 35 cited

The NuSTAR view of the non-thermal emission from PSR J0437-4715

Sebastien Guillot, Victoria M. Kaspi, Robert F. Archibald +11

We present a hard X-ray NuSTAR observation of PSR J0437-4715, the nearest millisecond pulsar. The known pulsations at the apparent pulse period ~5.76 ms are detected at energies up…

astro-ph.HE2015★ 60 cited

Systematic and Stochastic Variations in Pulsar Dispersion Measures

Michael T. Lam, James M. Cordes, Shami Chatterjee +3

We analyze deterministic and random temporal variations in dispersion measure (DM) from the full three-dimensional velocities of pulsars with respect to the solar system, combined…

astro-ph.HE2015★ 94 cited

Type II supernova energetics and comparison of light curves to shock-cooling models

Adam Rubin, Avishay Gal-Yam, Annalisa De Cia +37

During the first few days after explosion, Type II supernovae (SNe) are dominated by relatively simple physics. Theoretical predictions regarding early-time SN light curves in the…

astro-ph.HE2015★ 283 cited

Five new Fast Radio Bursts from the HTRU high latitude survey: first evidence for two-component bursts

D. J. Champion, E. Petroff, M. Kramer +17

The detection of five new fast radio bursts (FRBs) found in the High Time Resolution Universe high latitude survey is presented. The rate implied is 6 (95%)…

astro-ph.HE2015★ 47 cited

The NuSTAR Extragalactic Surveys: Initial Results and Catalog from the Extended Chandra Deep Field South

J. R. Mullaney, A. Del-Moro, J. Aird +33

We present initial results and the source catalog from the NuSTAR survey of the Extended Chandra Deep Field South (hereafter, ECDFS) - currently the deepest contiguous component of…

astro-ph.HE2015★ 74 cited

The NuSTAR Extragalactic Surveys: Overview and Catalog from the COSMOS Field

F. Civano, R. C. Hickox, S. Puccetti +28

To provide the census of the sources contributing to the X-ray background peak above 10 keV, NuSTAR is performing extragalactic surveys using a three-tier "wedding cake" approach.…

astro-ph.HE2015★ 58 cited

The NuSTAR Extragalactic Surveys: First Direct Measurements of the >10 keV X-Ray Luminosity Function for Active Galactic Nuclei at z>0.1

J. Aird, D. M. Alexander, D. R. Ballantyne +34

We present the first direct measurements of the rest-frame 10-40 keV X-ray luminosity function (XLF) of Active Galactic Nuclei (AGNs) based on a sample of 94 sources at 0.1 < z <3,…

astro-ph.HE2015★ 138 cited

NuSTAR catches the unveiling nucleus of NGC 1068

A. Marinucci, S. Bianchi, G. Matt +15

We present a NuSTAR and XMM-Newton monitoring campaign in 2014/2015 of the Compton-thick Seyfert 2 galaxy, NGC 1068. During the August 2014 observation, we detect with NuSTAR a flu…

astro-ph.HE2015★ 89 cited

Fast Radio Bursts and Radio Transients from Black Hole Batteries

Chiara M. F. Mingarelli, Janna Levin, T. Joseph W. Lazio

Most black holes (BHs) will absorb a neutron star (NS) companion fully intact, without tidal disruption, suggesting the pair will remain dark to telescopes. Even without tidal disr…

astro-ph.HE2015★ 58 cited

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…

astro-ph.HE2015★ 81 cited

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…

astro-ph.HE2015★ 49 cited

NuSTAR and XMM-Newton Observations of the Hard X-Ray Spectrum of Centaurus A

F. Fuerst, C. Mueller, K. K. Madsen +28

We present simultaneous XMM-Newton and NuSTAR observations spanning 3-78 keV of the nearest radio galaxy, Centaurus A (Cen A). The accretion geometry around the central engine in C…

astro-ph.HE2015★ 13 cited

ULX behaviour: the ultraluminous state, winds & interesting anomalies

T. P. Roberts, M. J. Middleton, A. D. Sutton +3

Recent evidence - in particular the hard X-ray spectra obtained by NuSTAR, and the large amplitude hard X-ray variability observed when ultraluminous X-ray sources (ULXs) show soft…

astro-ph.HE2015★ 2 cited

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…

astro-ph.HE2015★ 52 cited

The hard X-ray emission of the luminous infrared galaxy NGC 6240 as observed by NuSTAR

S. Puccetti, A. Comastri, F. E. Bauer +23

We present a broad-band (~0.3-70 keV) spectral and temporal analysis of NuSTAR observations of the luminous infrared galaxy NGC 6240, combined with archival Chandra, XMM-Newton and…

astro-ph.HE2015★ 4 cited

Timing analysis for 20 millisecond pulsars in the Parkes Pulsar Timing Array

D. J. Reardon, G. Hobbs, W. Coles +18

We present timing models for 20 millisecond pulsars in the Parkes Pulsar Timing Array. The precision of the parameter measurements in these models has been improved over earlier re…

astro-ph.HE2015★ 34 cited

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…

astro-ph.HE2015★ 71 cited

First NuSTAR Observations of Mrk 501 within a Radio to TeV Multi-Instrument Campaign

A. Furniss, K. Noda, S. Boggs +273

We report on simultaneous broadband observations of the TeV-emitting blazar Markarian 501 between 1 April and 10 August 2013, including the first detailed characterization of the s…

astro-ph.HE2015★ 114 cited

Diagnosing the accretion flow in ultraluminous X-ray sources using soft X-ray atomic features

Matthew J. Middleton, Dominic J. Walton, Andrew Fabian +5

The lack of unambiguous detections of atomic features in the X-ray spectra of ultraluminous X-ray sources (ULXs) has proven a hindrance in diagnosing the nature of the accretion fl…

astro-ph.HE2015★ 33 cited

What Powers the 3000-Day Light Curve of SN 2006gy?

Ori D. Fox, Nathan Smith, S. Mark Ammons +11

SN 2006gy was the most luminous SN ever observed at the time of its discovery and the first of the newly defined class of superluminous supernovae (SLSNe). The extraordinary energe…

astro-ph.HE2015★ 66 cited

NuSTAR Observations of the Compton-thick Active Galactic Nucleus and Ultraluminous X-ray Source Candidate in NGC 5643

A. Annuar, P. Gandhi, D. M. Alexander +22

We present two NuSTAR observations of the local Seyfert 2 active galactic nucleus (AGN) and an ultraluminous X-ray source (ULX) candidate in NGC 5643. Together with archival data f…