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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 synchrotron peak with Swift and NuSTAR. During the campaign,…

High Energy Astrophysical Phenomena · Physics 2015-10-14 A. Furniss , K. Noda , S. Boggs , J. Chiang , F. Christensen , W. Craig , P . Giommi , C. Hailey , F. Harisson , G. Madejski , K. Nalewajko , M. Perri , D. Stern , M. Urry , F. Verrecchia , W. Zhang , M. L. Ahnen , S. Ansoldi , L. A. Antonelli , P. Antoranz , A. Babic , B. Banerjee , P. Bangale , U. Barres de Almeida , J. A. Barrio , J. Becerra Gonzalez , W. Bednarek , E. Bernardini , B. Biasuzzi , A. Biland , O. Blanch , S. Bonnefoy , G. Bonnoli , F. Borracci , T. Bretz , E. Carmona , A. Carosi , A. Chatterjee , R. Clavero , P. Colin , E. Colombo , J. L. Contreras , J. Cortina , S. Covino , P. Da Vela , F. Dazzi , A. De Angelis , G. De Caneva , B. De Lotto , E. de Ona Wilhelmi , C. Delgado Mendez , F. Di Pierro , D. Dominis Prester , D. Dorner , M. Doro , S. Einecke , D. Eisenacher Glawion , D. Elsaesser , A. Fernandez-Barral , D. Fidalgo , M. V. Fonseca , L. Font , K. Frantzen , C. Fruck , D. Galindo , R. J. Garcia Lopez , M. Garczarczyk , D. Garrido Terrats , M. Gaug , P. Giammaria , N. Godinovic , A. Gonzalez Munoz , D. Guberman , Y. Hanabata , M. Hayashida , J. Herrera , J. Hose , D. Hrupec , G. Hughes , W. Idec , H. Kellermann , K. Kodani , Y. Konno , H. Kubo , J. Kushida , A. La Barbera , D. Lelas , N. Lewandowska , E. Lindfors , S. Lombardi , F. Longo , M. Lopez , R. Lopez-Coto , A. Lopez-Oramas , E. Lorenz , P. Majumdar , M. Makariev , K. Mallot , G. Maneva , M. Manganaro , K. Mannheim , L. Maraschi , B. Marcote , M. Mariotti , M. Martinez , D. Mazin , U. Menzel , J. M. Miranda , R. Mirzoyan , A. Moralejo , D. Nakajima , V. Neustroev , A. Niedzwiecki , M. Nievas Rosillo , K. Nilsson , K. Nishijima , R. Orito , A. Overkemping , S. Paiano , J. Palacio , M. Palatiello , D. Paneque , R. Paoletti , J. M. Paredes , X. Paredes-Fortuny , M. Persic , J. Poutanen , P. G. Prada Moroni , E. Prandini , I. Puljak , R. Reinthal , W. Rhode , M. Ribo , J. Rico , J. Rodriguez Garcia , T. Saito , K. Saito , K. Satalecka , V. Scapin , C. Schultz , T. Schweizer , S. N. Shore , A. Sillanpaa , J. Sitarek , I. Snidaric , D. Sobczynska , A. Stamerra , T. Steinbring , M. Strzys , L. Takalo , H. Takami , F. Tavecchio , P. Temnikov , T. Terzic , D. Tescaro , M. Teshima , J. Thaele , D. F. Torres , T. Toyama , A. Treves , V. Verguilov , I. Vovk , M. Will , R. Zanin , A. Archer , W. Benbow , R. Bird , J. Biteau , V. Bugaev , J. V Cardenzana , M. Cerruti , X. Chen , L. Ciupik , M. P. Connolly , W. Cui , H. J. Dickinson , J. Dumm , J. D. Eisch , A. Falcone , Q. Feng , J. P. Finley , H. Fleischhack , P. Fortin , L. Fortson , L. Gerard , G. H. Gillanders , S. Griffin , S. T. Griffiths , J. Grube , G. Gyuk , N. Haakansson , J. Holder , T. B. Humensky , C. A. Johnson , P. Kaaret , M. Kertzman , D. Kieda , M. Krause , F. Krennrich , M. J. Lang , T. T. Y. Lin , G. Maier , S. McArthur , A. McCann , K. Meagher , P. Moriarty , R. Mukherjee , D. Nieto , A. O'Faolain de Bhroithe , R. A. Ong , N. Park , D. Petry , M. Pohl , A. Popkow , K. Ragan , G. Ratliff , L. C. Reyes , P. T. Reynolds , G. T. Richards , E. Roache , M. Santander , G. H. Sembroski , K. Shahinyan , D. Staszak , I. Telezhinsky , J. V. Tucci , J. Tyler , V. V. Vassiliev , S. P. Wakely , O. M. Weiner , A. Weinstein , A. Wilhelm , D. A. Williams , B. Zitzer , O. Vince L. Fuhrmann , E. Angelakis , V. Karamanavis , I. Myserlis , T. P. Krichbaum , J. A. Zensus , H. Ungerechts , A. Sievers , R. Bachev , M. Bottcher , W. P. Chen , G. Damljanovic , C. Eswaraiah , T. Guver , T. Hovatta , Z. Hughes , S. . I. Ibryamov , M. D. Joner , B. Jordan , S. G. Jorstad , M. Joshi , J. Kataoka , O. M. Kurtanidze , S. O. Kurtanidze , A. Lahteenmaki , G. Latev , H. C. Lin , V. M. Larionov , A. A. Mokrushina , D. A. Morozova , M. G. Nikolashvili , C. M. Raiteri , V. Ramakrishnan , A. C. R. Readhead , A. C. Sadun , L. A. Sigua , E. H. Semkov , A. Strigachev , J. Tammi , M. Tornikoski , Y. V. Troitskaya I. S. Troitsky , M. Villata

The Nuclear Spectroscopic Telescope Array (NuSTAR) is a NASA Small Explorer mission that will carry the first focusing hard X-ray (5 -- 80 keV) telescope to orbit. NuSTAR will offer a factor 50 -- 100 sensitivity improvement compared to…

We present the results of the search for decaying dark matter with particle mass in the 6-40 keV range with NuSTAR deep observations of COSMOS and ECDFS empty sky fields. We show that main contribution to the decaying dark matter signal…

High Energy Astrophysical Phenomena · Physics 2016-12-07 Andrii Neronov , Denys Malyshev , Dominique Eckert

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 campaign. We report on the data obtained between July 2012 and…

StrayCats, the catalog of NuSTAR stray light observations, contains data from bright X-ray sources that fall within crowded source regions. These observations offer unique additional data with which to monitor sources like X-ray binaries…

B2 1023+25 is an extremely radio-loud quasar at z=5.3 which was first identified as a likely high-redshift blazar candidate in the SDSS+FIRST quasar catalog. Here we use the Nuclear Spectroscopic Telescope Array (NuSTAR) to investigate its…

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 that of other NLS1s: relativistic reflection and partial…

We present results from the coordinated broadband X-ray observations of the extreme ultraluminous X-ray source Holmberg IX X-1 performed by NuSTAR, XMM-Newton and Suzaku in late 2012. These observations provide the first high-quality…

We present broadband (3 -- 78 keV) NuSTAR X-ray imaging and spectroscopy of the Crab nebula and pulsar. We show that while the phase-averaged and spatially integrated nebula + pulsar spectrum is a power-law in this energy band, spatially…

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, VERITAS, and other collaborations and instruments, providing…

High Energy Astrophysical Phenomena · Physics 2017-08-30 M. Baloković , D. Paneque , G. Madejski , A. Furniss , J. Chiang , the NuSTAR team , : , M. Ajello , D. M. Alexander , D. Barret , R. Blandford , S. E. Boggs , F. E. Christensen , W. W. Craig , K. Forster , P. Giommi , B. W. Grefenstette , C. J. Hailey , F. A. Harrison , A. Hornstrup , T. Kitaguchi , J. E. Koglin , K. K. Madsen , P. H. Mao , H. Miyasaka , K. Mori , M. Perri , M. J. Pivovaroff , S. Puccetti , V. Rana , D. Stern , G. Tagliaferri , C. M. Urry , N. J. Westergaard , W. W. Zhang , A. Zoglauer , the VERITAS collaboration , : , S. Archambault , A. A. Archer , A. Barnacka , W. Benbow , R. Bird , J. Buckley , V. Bugaev , M. Cerruti , X. Chen , L. Ciupik , M. P. Connolly , W. Cui , H. J. Dickinson , J. Dumm , J. D. Eisch , A. Falcone , Q. Feng , J. P. Finley , H. Fleischhack , L. Fortson , S. Griffin , S. T. Griffiths , J. Grube , G. Gyuk , M. Huetten , N. Haakansson , J. Holder , T. B. Humensky , C. A. Johnson , P. Kaaret , M. Kertzman , Y. Khassen , D. Kieda , M. Krause , F. Krennrich , M. J. Lang , G. Maier , S. McArthur , K. Meagher , P. Moriarty , T. Nelson , D. Nieto , R. A. Ong , N. Park , M. Pohl , A. Popkow , E. Pueschel , P. T. Reynolds , G. T. Richards , E. Roache , M. Santander , G. H. Sembroski , K. Shahinyan , A. W. Smith , D. Staszak , I. Telezhinsky , N. W. Todd , J. V. Tucci , J. Tyler , S. Vincent , A. Weinstein , A. Wilhelm , D. A. Williams , B. Zitzer , the MAGIC collaboration , : , M. L. Ahnen , S. Ansoldi , L. A. Antonelli , P. Antoranz , A. Babic , B. Banerjee , P. Bangale , U. Barres de Almeida , J. Barrio , J. Becerra González , W. Bednarek , E. Bernardini , B. Biasuzzi , A. Biland , O. Blanch , S. Bonnefoy , G. Bonnoli , F. Borracci , T. Bretz , E. Carmona , A. Carosi , A. Chatterjee , R. Clavero , P. Colin , E. Colombo , J. L. Contreras , J. Cortina , S. Covino , P. Da Vela , F. Dazzi , A. de Angelis , B. De Lotto , E. D. de Oña Wilhelmi , C. Delgado Mendez , F. Di Pierro , D. Dominis Prester , D. Dorner , M. Doro , S. Einecke , D. Elsaesser , A. Fernández-Barral , D. Fidalgo , M. V. Fonseca , L. Font , K. Frantzen , C. Fruck , D. Galindo , R. J. García López , M. Garczarczyk , D. Garrido Terrats , M. Gaug , P. Giammaria , D. Eisenacher , N. Godinović , A. González Muñoz , D. Guberman , A. Hahn , Y. Hanabata , M. Hayashida , J. Herrera , J. Hose , D. Hrupec , G. Hughes , W. Idec , K. Kodani , Y. Konno , H. Kubo , J. Kushida , A. La Barbera , D. Lelas , E. Lindfors , S. Lombardi , F. Longo , M. López , R. López-Coto , A. López-Oramas , E. Lorenz , P. Majumdar , M. Makariev , K. Mallot , G. Maneva , M. Manganaro , K. Mannheim , L. Maraschi , B. Marcote , M. Mariotti , M. Martínez , D. Mazin , U. Menzel , J. M. Miranda , R. Mirzoyan , A. Moralejo , E. Moretti , D. Nakajima , V. Neustroev , A. Niedzwiecki , M. Nievas-Rosillo , K. Nilsson , K. Nishijima , K. Noda , R. Orito , A. Overkemping , S. Paiano , S. Palacio , M. Palatiello , R. Paoletti , J. M. Paredes , X. Paredes-Fortuny , M. Persic , J. Poutanen , P. G. Prada Moroni , E. Prandini , I. Puljak , W. Rhode , M. Ribó , J. Rico , J. Rodriguez Garcia , T. Saito , K. Satalecka , V. Scapin , C. Schultz , T. Schweizer , S. N. Shore , A. Sillanpää , J. Sitarek , I. Snidaric , D. Sobczynska , A. Stamerra , T. Steinbring , M. Strzys , L. O. Takalo , H. Takami , F. Tavecchio , P. Temnikov , T. Terzić , D. Tescaro , M. Teshima , J. Thaele , D. F. Torres , T. Toyama , A. Treves , V. Verguilov , I. Vovk , J. E. Ward , M. Will , M. H. Wu , R. Zanin , external collaborators , : , J. Perkins , F. Verrecchia , C. Leto , M. Böttcher , M. Villata , C. M. Raiteri , J. A. Acosta-Pulido , R. Bachev , A. Berdyugin , D. A. Blinov , M. I. Carnerero , W. P. Chen , P. Chinchilla , G. Damljanovic , C. Eswaraiah , T. S. Grishina , S. Ibryamov , B. Jordan , S. G. Jorstad , M. Joshi , E. N. Kopatskaya , O. M. Kurtanidze , S. O. Kurtanidze , E. G. Larionova , L. V. Larionova , V. M. Larionov , G. Latev , H. C. Lin , A. P. Marscher , A. A. Mokrushina , D. A. Morozova , M. G. Nikolashvili , E. Semkov , A. Strigachev , Yu. V. Troitskaya , I. S. Troitsky , O. Vince , J. Barnes , T. Güver , J. W. Moody , A. C. Sadun , S. Sun , T. Hovatta , J. L. Richards , W. Max-Moerbeck , A. C. Readhead , A. Lähteenmäki , M. Tornikoski , J. Tammi , V. Ramakrishnan , R. Reinthal , E. Angelakis , L. Fuhrmann , I. Myserlis , V. Karamanavis , A. Sievers , H. Ungerechts , J. A. Zensus

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 flux excess above 20 keV ($32\pm6 \%$) with respect to the…

The capability of NuSTAR to detect polarization in the Compton scattering regime (>50 keV) has been investigated. The NuSTAR mission, flown on June 2012 a Low Earth Orbit (LEO), provides a unique possibility to confirm the findings of…

Instrumentation and Methods for Astrophysics · Physics 2015-06-05 Simone Lotti , Lorenzo Natalucci , Paolo Giommi , B. Grefenstette , Fiona A. Harrison , Kristin K. Madsen , Matteo Perri , Simonetta Puccetti , Andreas Zoglauer

We present results from a joint Xmm-Newton/NuSTAR monitoring of the Seyfert 1 NGC 4593, consisting of 5x20 ks simultaneous observations spaced by two days, performed in January 2015. The source is variable, both in flux and spectral shape,…

High Energy Astrophysical Phenomena · Physics 2016-08-17 F. Ursini , P. -O. Petrucci , G. Matt , S. Bianchi , M. Cappi , B. De Marco , A. De Rosa , J. Malzac , A. Marinucci , G. Ponti , A. Tortosa

The blazar Mrk 501 is among the brightest X-ray and TeV sources in the sky, and among the few sources whose spectral energy distributions can be characterized by current instruments with relatively short observations (minutes to hours). In…

High Energy Astrophysical Phenomena · Physics 2015-08-21 Koji Noda , Amy Furniss , Josefa Becerra González , Greg Madejski , David Paneque

In previous work, we have used data from the first three years of the CGRO mission to assemble a broad-band $\gamma$-ray spectrum of the galactic black hole candidate Cygnus X-1. Contemporaneous data from the COMPTEL, OSSE and BATSE…

Here we study a 1-200 keV energy spectrum of the black hole binary Cygnus X-1 taken with NuSTAR and Suzaku. This is the first report of a NuSTAR observation of Cyg X-1 in the intermediate state, and the observation was taken during the part…

We analyze the broad-band X-ray spectrum (0.3-50 keV) of the luminous Seyfert 1 / quasar PG 1211+143 - the archetypal source for high-velocity X-ray outflows - using near-simultaneous XMM-Newton and NuSTAR observations. We compare pure…

High Energy Astrophysical Phenomena · Physics 2016-11-15 Andrew Lobban , Ken Pounds , Simon Vaughan , James Reeves

We observed with the NuSTAR satellite 3 blazars at z>2, detected in gamma-rays by Fermi/LAT and in the soft X-rays, but not yet observed above 10 keV. The flux and slope of their X-ray continuum, together with Fermi/LAT data allows us to…

High Energy Astrophysical Phenomena · Physics 2019-07-10 G. Ghisellini , M. L. Perri , G. Costamante , G. Tagliaferri , T. Sbarrato , S. Campitiello , G. Madejski , F. Tavecchio , G. Ghirlanda

Stray radiation is a considerable challenge for radio telescopes, requiring careful assessment due to its effects. This is crucial when the strong background flux from side lobes significantly affects the total flux, especially for extended…

Instrumentation and Methods for Astrophysics · Physics 2026-05-27 Qingze Chen , Jie Wang , Yingjie Jing , Ligang Hou , Chen Xu , Tiantian Liang , Xuyang Gao , Jinlin Han , Ziming Liu , Bin Liu , Chuanpeng Zhang , Hengqian Gan , Ming Zhu , Yan Zhu , Peng Jiang