D. Wik — Scifaro

StrayCats II: An Updated Catalog of NuSTAR Stray Light Observations

We present an updated catalog of StrayCats (a catalog of NuSTAR stray light observations of X-ray sources) that includes nearly 18 additional months of observations. StrayCats v2 has an added 53 sequence IDs, 106 rows, and 3 new identified…

High Energy Astrophysical Phenomena · Physics 2022-08-03 R. M. Ludlam , B. W. Grefenstette , M. C. Brumback , J. A. Tomsick , D. J. K. Buisson , B. M. Coughenour , G. Mastroserio , D. Wik , R. Krivonos , A. D. Jaodand , K. K. Madsen

Extending the baseline for SMC X-1's spin and orbital behavior with NuSTAR stray light

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…

High Energy Astrophysical Phenomena · Physics 2022-03-02 McKinley C. Brumback , B. W. Grefenstette , D. J. K. Buisson , M. Bachetti , R. Connors , J. A. Garcia , A. Jaodand , R. Krivonos , R. Ludlam , K. K. Madsen , G. Mastroserio , J. A. Tomsick , D. Wik

Neutron Stars and Black Holes in the Small Magellanic Cloud: The SMC NuSTAR Legacy Survey

We present a source catalog from the first deep hard X-ray ($E>10$ keV) survey of the Small Magellanic Cloud (SMC), the NuSTAR Legacy Survey of the SMC. We observed three fields, for a total exposure time of 1 Ms, along the bar of this…

High Energy Astrophysical Phenomena · Physics 2019-10-16 M. Lazzarini , B. F. Williams , A. E. Hornschemeier , V. Antoniou , G. Vasilopoulos , F. Haberl , N. Vulic , M. Yukita , A. Zezas , A. Bodaghee , B. D. Lehmer , T. J. Maccarone , A. Ptak , D. Wik , F. M. Fornasini , Jaesub Hong , J. A. Kennea , J. A. Tomsick , T. Venters , A. Udalski , A. Cassity

Young Accreting Compact Objects in M31: The Combined Power of NuSTAR, Chandra, and Hubble

We present 15 high mass X-ray binary (HMXB) candidates in the disk of M31 for which we are able to infer compact object type, spectral type of the donor star, and age using multiwavelength observations from NuSTAR, Chandra, and the Hubble…

High Energy Astrophysical Phenomena · Physics 2018-08-01 M. Lazzarini , A. E. Hornschemeier , B. F. Williams , D. Wik , N. Vulic , M. Yukita , A. Zezas , A. R. Lewis , M. Durbin , A. Ptak , A. Bodaghee , B. D. Lehmer , V. Antoniou , T. Maccarone

Identification of the Hard X-ray Source Dominating the E > 25 keV Emission of the Nearby Galaxy M31

We report the identification of a bright hard X-ray source dominating the M31 bulge above 25 keV from a simultaneous NuSTAR-Swift observation. We find that this source is the counterpart to Swift J0042.6+4112, which was previously detected…

Astrophysics of Galaxies · Physics 2017-03-29 M. Yukita , A. Ptak , A. E. Hornschemeier , D. Wik , T. J. Maccarone , K. Pottschmidt , A. Zezas , V. Antoniou , R. Ballhausen , B. D. Lehmer , A. Lien , B. Williams , F. Baganoff , P. T. Boyd , T. Enoto , J. Kennea , K. L. Page , Y. Choi

The NuSTAR Extragalactic Surveys: The Number Counts of Active Galactic Nuclei and the Resolved Fraction of the Cosmic X-ray Background

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 background in the 8-24 keV band, directly identifying AGN with…

High Energy Astrophysical Phenomena · Physics 2016-11-15 F. A. Harrison , J. Aird , F. Civano , G. Lansbury , J. R. Mullaney , D. R. Ballantyne , D. M. Alexander , D. Stern , M. Ajello , D. Barret , F. E. Bauer , M. Balokovic , W. N. Brandt , M. Brightman , S. E. Boggs , F. E. Christensen , A. Comastri , W. W. Craig , A. Del Moro , K. Forster , P. Gandhi , P. Giommi , B. W. Grefenstette , C. J. Hailey , R. C. Hickox , A. Hornstrup , T. Kitaguchi , J. Koglin , B. Luo , K. K. Madsen , P. H. Mao , H. Miyasaka , K. Mori , M. Perri , M. Pivovaroff , S. Puccetti , V. Rana , E. Treister , D. Walton , N. J. Westergaard , D. Wik , L. Zappacosta , W. W. Zhang , A. Zoglauer

Dark matter line emission constraints from NuSTAR observations of the Bullet Cluster

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 pointed observation of the Bullet Cluster with NuSTAR. We do…

Cosmology and Nongalactic Astrophysics · Physics 2015-09-09 S. Riemer-Sørensen , D. Wik , G. Madejski , S. Molendi , F. Gastaldello , F. A. Harrison , W. W. Craig , C. J. Hailey , S. E. Boggs , F. E. Christensen , D. Stern , W. W. Zhang , A. Hornstrup

A Focused, Hard X-ray Look at Arp 299 with NuSTAR

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 keV. Fitting the 3-40 keV spectrum reveals a column density…

Astrophysics of Galaxies · Physics 2015-06-23 A. Ptak , A. Hornschemeier , A. Zezas , B. Lehmer , M. Yukita , D. Wik , V. Antoniou , M. K. Argo , L. Ballo , K. Bechtol , S. Boggs , R. Della Ceca , F. E. Christensen , W. W. Craig , C. J. Hailey , F. A. Harrison , R. Krivonos , T. J. Maccarone , D. Stern , M. Tatum , T. Venters , W. W. Zhang

Hard X-ray emitting Active Galactic Nuclei selected by the Chandra Multi-wavelength Project

We present X-ray and optical analysis of 188 AGN identified from 497 hard X-ray (f (2.0-8.0 keV) > 2.7x10^-15 erg cm^-2 s^-1) sources in 20 Chandra fields (1.5 deg^2) forming part of the Chandra Multi-wavelength Project. These medium depth…

Astrophysics · Physics 2014-10-13 J. Silverman , P. Green , W. Barkhouse , D. Kim , T. Aldcroft , R. Cameron , B. Wilkes , A. Mossman , H. Ghosh , H. Tananbaum , M. Smith , R. Smith , P. Smith , C. Foltz , D. Wik , B. Jannuzi