Dr. Daniel Ryan Wik | Curriculum Vitae

201 James Fletcher Bldg. | 115 S. 1400 E. | Salt Lake City, UT 84112-0830
(801) 585-5832 | wik@astro.utah.edu | http://www.astro.utah.edu/~wik
PDF version of CV: http://www.astro.utah.edu/~wik/cv.pdf

Research Interests and Experience

Dr. Wik’s research includes investigations of inverse Compton scattering in galaxy clusters and starburst galaxies, the effects of cluster mergers on intracluster gas and their cosmological implications, the X-ray binary populations of galaxies, dark matter searches, and the X-ray background. He is an observational X-ray astronomer with extensive experience carrying out observatory data calibration and analysis tool development, who also has some background in computer simulations and instrumentation.

Research Positions

2023-present: Associate Professor, University of Utah
2017-2023: Assistant Professor, University of Utah
2013-2017: Assistant Research Scientist, Johns Hopkins University, at NASA/GSFC
2010-13: NASA Postdoctoral Position (NPP) Fellow at Goddard Space Flight Center

Education

2010: Ph.D. Astronomy, University of Virginia (UVa), Charlottesville, VA
- Dissertation Title: “Inverse Compton Scattering in Galaxy Clusters”
- Advisor: Craig Sarazin
2006: M.Sc. Astronomy, University of Virginia, Charlottesville, VA
2003: B.Sc. Astrophysics (Minor: Mathematics), Ohio University, Athens, OH

Awards and Honors

2019: Students’ Choice Award for the best Undergraduate Seminar (Spring)
2017: NASA Special Act Team Award for the GSFC Hitomi Science Team
2017: NASA RHG Exceptional Achievement for Science Award for the Hitomi Instrument Teams
2016: NASA Exceptional Public Achievement Medal for developing the NuSTAR background model
2015: NASA Group Achievement Award (NuSTAR Project Team)
2014: NASA Group Achievement Award (NuSTAR Science Team)
2010: NASA Postdoctoral Program Fellowship
2010: AAS/HEAD Travel Grant
2009-10: UVa Graduate School of Arts & Sciences Dissertation-Year Fellowship
2007-10: Virginia Space Grant Consortium, Graduate Aerospace Research Fellowship
2007-8: DuPont Fellowship from University of Virginia Graduate School of Arts & Sciences
2006: University Graduate Teaching Assistant Award, University of Virginia

Successful Observing and Funding Proposals

Amounts in bold are external funding to Utah, totaling $2.94M since 2017

2024: ADAP, PI, “X-ray Cross-calibration and the Impact on Cluster Cosmology,” $449,098
2024: XRISM, PI, “Gas Dynamics in the Line-of-Sight Merger Abell 2163 with XRISM,” 200 ks, $176,173
2024: NuSTAR, PI, “Extreme Emission in Abell 2219: Hot Gas and Inverse Compton Constraints,” 220 ks, $79,045
2024: NuSTAR, Budget PI, “The Temperature and Mass of Abell 2204 and 2142: Comparing Chandra, XMM-Newton and NuSTAR,” 210 ks, $77,803
2024: NuSTAR, Budget PI, “Exploring the Train Wreck with NuSTAR: an Analysis of Abell 520,” 175 ks, $78,017 (transferred to CfA)
2024: FINESST, Budget PI, “Time Domain X-ray Studies of AGN in the JWST-NEP Field,” $99,832
2023: NuSTAR, Budget PI, “All the Luminous X-ray binaries in M31: Hard X-ray Demographics and Binary Population Synthesis Applications,” 825 ks, $124,471
2023: NuSTAR, Budget PI, “Probing the Sharp Radio Edge of Abell 2255,” 110 ks, $60,303
2023: NuSTAR, Co-I, “Capturing the Double Radio Relic System, ZwCl 1856.8, within the NuSTAR Field of View”, 240 ks
2023: NuSTAR, Co-I, “Confirming the first X-ray detection of Inverse Compton in a galaxy group with NuSTAR”, 375 ks, C priority, $20,000
2022: XRISM, PI, “Hard Bandpass Extension of XRISM Cluster Observations with NuSTAR and XMM-Newton,” $123,288
2022: Chandra, Budget PI, “Confirming the First [Fe X]-selected Black Hole Candidates in Dwarf Galaxies,” 151 ks, $101,740 37,588
2022: NuSTAR, PI, “Galaxy Cluster Temperatures: Solving the Chandra-XMM-Newton Temperature Discrepancy,” 220 ks, C priority $20,000
2022: NuSTAR, Co-I (Budget PI), “The Fascinating Merger of Abell 3266,” 200 ks, B priority $94,469
2022: NuSTAR, Co-I, “ZWCL 1856.8: Capturing a Double Radio Relic in the NuSTAR Field of View,” 30 ks, A priority
2021: NuSTAR, Co-I (Budget PI), “CL0217+70: A Late Stage Galaxy Cluster Merger and its Tell-tale Radio Halo,” 180 ks, $77,493
2020: NuSTAR, Co-I (Budget PI), “Constraining the Nature of Dark Matter with CIZA 0107.7+5408,” 165 ks, C priority, $20,000
2020: NuSTAR, Co-I (Budget PI), “Pre-merger Dynamics of Abell 3395,” 129 ks, C priority, $20,000
2020: NuSTAR, PI, Accurate Galaxy Cluster Temperatures: a Legacy Dataset with Chandra, XMM-Newton, AND XRISM, 604 ks, $117,292
2020: NuSTAR, PI, Accurate Cluster Temperatures and Inverse Compton Emission in Abell 2319, 132 ks, $67,512
2020: NuSTAR/HEASARC Software Development Grant, PI, “Converting the NuSTAR NuSKYBGD IDL Software to Python and Expanding its Capabilities,” $49,506
2020: College of Science Seed Grant, PI, “Finding Shock Waves in the Largest Objects in the Universe,” $15,000
2019: XMM-Newton, Co-I, “Excavating a dinosaur in the Ophiuchus Cluster,” 169 ks
2019: NASA ADAP, PI, “The cluster gas surrounding NuSTAR-observed AGN,” $220,532
2019: NuSTAR, Co-I (Budget PI), “Mapping the Temperature Structure of the Complex Hot Merging Galaxy Cluster MACS J0717,” 165 ks, $71,994
2019: NuSTAR, Co-I, “A NuSTAR-XMM Survey of NGC 55: a holistic view of a low metallicity X-ray binary population,” 400 ks
2018: NASA ADAP, PI, “Mapping the Most Energetic Electrons in Extended Galaxy Clusters with NuSTAR: Setting the Stage for XARM,” $252,340
2018: Chandra, PI, “Complex Merging in Abell 2345: Characterizing Multiple Potential Shock Fronts,” 210 ks, $85,210
2018: Chandra, Co-I, “The Giant Elliptical Galaxy in our Backyard: the Resolved 1-30 keV X-ray Binary Population of Maffei 1,” 115 ks
2018: NuSTAR, PI, “Mapping the temperature structure across two shocks in the massive merging cluster Abell 2146,” 220 ks, $71,489
2018: NuSTAR, PI, “Toward a Better Census of Black Holes and Neutron Stars in the Disk of M31,” 150 ks, C priority, $10,000
2018: NuSTAR, Co-I, “A Measurement of the 0.3–30 keV Spectrum of the Low-Metallicity Galaxy VV114,” 200 ks
2017: XMM-Newton, PI, “The Structure of the Violent Merger in PLCKESZ G200.9-28.2,” 48 ks, $50,843
2017: NSF, PI, “SnowCluster 2018: The Physics of Galaxy Clusters” conference support, $20,500
2017: Chandra, Co-I, “A Possible First Detection of Inverse Compton Emission from a Galaxy Cluster,” 350 ks
2017: Chandra, Co-I, “One of a Handful in the Universe: Confirming a Wolf-Rayet X-ray Binary Candidate in NGC 253,” 160 ks
2017: NuSTAR, PI, “Toward a Better Census of Black Holes and Neutron Stars in the Disk of M31,” 200 ks, $61,990
2017: NuSTAR, PI, “The Merger-Minihalo Connection in the Ophiuchus Cluster: a Smoking Gun?,” 110 ks, $48,016
2017: NuSTAR, Co-I, “Monitoring X-ray Binaries in the M31 Bulge with NuSTAR”
2016: NASA ADAP, PI, “The Definitive NuSTAR Measurement of the Unresolved Cosmic X-ray Background,” $213,856 ($177,943)
2016: XMM-Newton, Co-I, “A Coordinated XMM-Newton and NuSTAR Survey of the HMXB Population in M33”
2016: Chandra, PI, “A Violent merger in the cluster PLCKESZ G200.9-28.2: Relic formation caught in action?,” 150 ks, $61,090
2016: NuSTAR, PI, “What a Shock! Constraining the Heating Mechanism in Abell 665,” 200 ks, $50,362
2016: NuSTAR, Co-I, “The NuSTAR View of the Shocked Region in Abell 754,” 100 ks
2016: NuSTAR, Co-I, “The Hard X-ray Pulsar Candidate that may Dominate M31 at E>25 keV: NuSTAR-XMM Observations of the M31 Bulge,” 100 ks
2015: Chandra, Co-I, “0.5-30 keV Monitoring of the M31 Disk with Chandra and NuSTAR,” 25 ks
2015: NuSTAR, PI, “Unambiguously Detecting Non-thermal and Shocked Gas in Abell 2163,” 115 ks, $42,739 $29,705
2015: NuSTAR, Co-I, “Binaries in the M31 Bulge: A Hard X-ray View of Old Stellar Populations,” 100 ks
2015: NuSTAR, Co-I, “Monitoring the X-ray Binary Populations of the M31 Disk with NuSTAR,” 300 ks
2014: XMM-Newton, PI, “The Scorpius Galaxy Cluster: Mapping a Merger in a Newly Discovered 9 keV Cluster,” 112 ks
2014: Chandra, Co-I, “PKS B1400-33 and Abell S753: A Very Bright Radio Relic in a Poor Cluster,” 94 ks
2014: Chandra, Co-I, “Thermal and (or?) Relativistic Matter in the Brightest Cluster Radio Relic,” 200 ks
2013: XMM-Newton, Co-I, “PKS B1400-33 and Abell S753: A Very Bright Radio Relic in a Poor Cluster,” 136 ks
2012: XMM-Newton, Co-I, “Merger Activity and Radio Emission Within and Between Abell 2061 and 2067,” 45 ks
2012: GMRT, Co-I, “Low frequency follow-up of the first radio halo in a Planck cluster,” 10 hrs
2012: GMRT, Co-I, “Confirming a radio relic in a new Planck cluster”, 16 hrs
2011: XMM-Newton, PI, “Clumping, Contamination, or Equilibrium in the Outskirts of Abell 1689?”, 100 ks, $70,845
2010: XMM-Newton, PI, “Completing the XMM Legacy Mosaic of the Perseus cluster,” 90 ks
2009: XMM-Newton, PI, “The Double Relic Cluster A2345: A Dramatic Off-axis Merger,” 80 ks
2008: Suzaku, Co-I, “Hard X-ray Inverse Compton Emission from the Radio Relic & the Dynamics of the Merging Subgroup in the Coma Cluster,” 161 ks
2008: Suzaku, Co-I, “PKS B1400-33 & Abell S753: A Very Bright Radio Relic in a Poor Cluster,” 120 ks
2008: Chandra, PI, “A Merger Shock Front due to Subcluster Infall in Abell 2061?,” 32 ks, $36,365
2008: XMM-Newton, PI, “Unraveling the Merger States of Abell 2345 & 2254,” 61 ks
2008: Suzaku, PI, “Properties of the Merger & Radio Source Interaction in the Cygnus A Cluster,” 45 ks, $8,995
2007: XMM-Newton, Co-I, “XMM-Newton Observation of the NW Merger Shock and Radio Relic in Abell 3667,” 53 ks
2007: XMM-Newton, PI, “Merger Activity In & Between Abell 2061 & 2067,” 30 ks
2006: Suzaku, Co-I, “Nailing Down the Hard X-ray Inverse Compton Emission from the Radio Halo in the Coma Cluster,” 180 ks
2006: Suzaku, Co-I, “Hard X-ray Inverse Compton Emission & a Merger Shock Associated with the Brightest Known Radio Relic in Abell 3667,” 135 ks

Department & Community Service

NuSTAR User’s Committee, chair, 2020-present
Graduate Admissions Coordinating Committee (chair and member), 2022-present
Development Committee (chair and member), 2023-present
Equity, Diversity, & Inclusion (EDI) Committee (chair and member), 2019-2023
College of Science EDI Executive Committee, 2022-2023
Multimessenger Astrophysics Faculty Search Committee, 2022-2023
Teaching Excellence Committee, 2020-2021, 2022-2023
Postdoctoral Affairs, 2020-2021
Astronomy Computational Faculty Search Committee, 2020-2021
College of Science Dean Search Committee, 2018-2019
Astro Data Science Faculty Search Committee, 2018-2019
Astro Task Force, 2017-present
Colloquium committee member, 2018-2020
Graduate Admissions committee member, 2017-2018
HEAP Seminar committee member, 2017-2018, 2021-2022
SnowCluster 2018: The Physics of Galaxy Clusters SOC & LOC member, March 18-22, Snowbird, UT
Served on proposal review panels for NSF AAG grants, NASA ADAP grants, the Netherlands Organisation for Scientific Research, and Suzaku, Chandra, and Swift Guest Observer programs
Referee for the Astrophysical Journal, MNRAS, Research Notes of the AAS, SPIE/JATIS, and Experimental Astronomy
Lobbied Congress on behalf of the AAS on Congressional Visits Day, 2011 & 2012

Refereed Publications

Myself and contemporaneous student/postdoc names in bold

“A uGMRT and MeerKAT Study of Radio Relics in the Low-mass Merging Cluster PSZ2 G200.95-28.16,” Arpan Pal, Ruta Kale, Qian H. S. Wang, and Daniel R. Wik, ApJ, 2025, 979, 4
“The Radio Halo in PLCKESZ G171.94–40.65: Beacon of Merging Activity,” R. Santra, R. Kale, S. Giacintucci, D. R. Wik, T. Venturi, D. Dallacasa, R. Cassano, G. Brunetti, and D. C. Joshi, 2024, ApJ, 976, 66
“NuSTAR Observation of the TeV-detected Radio Galaxy 3C 264: Core Emission and the Hot Accretion Flow Contribution,” Ka-Wah Wong, Colin M. Steiner, Allison M. Blum, Dacheng Lin, Rodrigo Nemmen, Jimmy A. Irwin, and Daniel R. Wik, 2024, ApJ, 974, 82
“A NuSTAR Census of the X-Ray Binary Population of the M31 Disk,” Hannah Moon, Daniel R. Wik, V. Antoniou, M. Eracleous, Ann E. Hornschemeier, Margaret Lazzarini, Bret D. Lehmer, Neven Vulic, Benjamin F. Williams, T. J. Maccarone, K. Pottschmidt, Andrew Ptak, Mihoko Yukita, and Andreas Zezas, 2024, ApJ, 970, 167
“Upper limits of 44Ti decay emission in four nearby thermonuclear supernova remnants,” Weng, J., Zhou, P., Perets, H. B., Wik, D. R., Chen, Y. 2024, MNRAS, 529, 999
“The NuSTAR View of Perseus: the ICM and a Peculiar Hard Excess,” Creech, S., Wik, D. R., Rossland, S., Tümer, A., Wong, K., Walker, S. A. 2024, ApJ, 965, 33
“ZWCL 1856.8: A rare double radio relic system captured within NuSTAR and Chandra field of view,” Tümer, A., Wik, D. R., Schellenberger, G., Miller, E. D., Bautz, M. W. 2024, ApJ, 962, 94
“The Hydrostatic Mass of A478: Discrepant Results from Chandra, NuSTAR, and XMM-Newton,” Potter, C., Tümer, A., Wang, Q. H. S., Wik, D. R., Maughan, B. J., Schellenberger, G. 2023, ApJ, 958, 112
“The high energy X-ray probe: resolved X-ray populations in extragalactic environments,” Lehmer, B. D., Garofali, K., Binder, B. A., Fornasini, F., Vulic, N., Zezas, A., Hornschemeier, A., Lazzarini, M., Moon, H., Venters, T., Wik, D. R., Yukita, M., Bachetti, M., García, J. A., Grefenstette, B., Madsen, K., Mori, K., Stern, D. 2023, FrASS, 10, 1293918
“Wavelet-based image decomposition method for NuSTAR stray light background studies,” Mukhin, A., Krivonos, R., Vikhlinin, A., Grefenstette, B., Madsen, K., Wik, D. R. 2023, JATIS, 9, 048001
“NuSTAR Observations of Abell 665 and 2146: Constraints on Nonthermal Emission,” Rojas Bolivar, R. A., Wik, D. R., Tümer, A., Gastaldello, F., Hlavacek-Larrondo, J., Nulsen, P., Vacca, V., Madejski, G., Sun, M., Sarazin, C. L., Sanders, J., Caprioli, D., Grefenstette, B., Westergaard, N. J. 2023, ApJ, 954, 76
“Multiwavelength Characterization of the High Mass X-ray Binary Population of M33,” Lazzarini, M., Hinton, K., Shariat, C., Williams, B., Garofali, K., Dalcanton, J., Durbin, M., Antoniou, V., Binder, B., Eracleous, M., Vulic, N., Yang, J., Wik, D., Gasca, A., Kuauhtzin, Q. 2023, ApJ, 952, 114
“Measuring the Cosmic X-ray Background in 3-20 KeV with Straylight from NuSTAR,” Rossland, S., Wik, D., Grefenstette, B., Cappelluti, N., Civano, F., Gastaldello, F., Gilli, R., Harrison, F., Hornschemeier, A., Hickox, R., Krivonos, R., Madsen, K., Molendi, S., Ptak, A., Stern, D., Zoglauer, A. 2023, AJ, 166, 20
“Gas clumping in the outskirts of galaxy clusters, an assessment of the sensitivity of STAR-X,” Norseth, C. T., Wik, D. R., ZuHone, J. A., Miller, E. D., Bautz, M. W., McDonald, M., 2023, RASTI, 2, 607
“Long-exposure NuSTAR constraints on decaying dark matter in the Galactic halo,” Roach, B., Rossland, S., Ng, K., Perez, K., Beacom, J., Grefenstette, B., Horiuchi, S., Krivonos, R., Wik, D. 2023, PhRvD, 107, 023009
“The NuSTAR and Chandra View of CL 0217+70 and Its Tell-tale Radio Halo,” Tumer, A., Wik, D., Zhang, X., Hoang, D., Gaspari, Ma., van Weeren, R., Rudnick, L., Stuardi, C., Mernier, F., Simionescu, A., Rojas Bolivar, R., Kraft, R., Akamatsu, H., de Plaa, J. 2023, ApJ, 942, 79
“A systematic comparison of galaxy cluster temperatures measured with NuSTAR and Chandra,” Wallbank, A. N., Maughan, B. J., Gastaldello, F., Potter, C., Wik, D. R. 2022, MNRAS, 517, 5594
“StrayCats. II. An Updated Catalog of NuSTAR Stray Light Observations,” Ludlam, R. M., Grefenstette, B. W., Brumback, M. C., Tomsick, J. A., Buisson, D. J. K., Coughenour, B. M., Mastroserio, G., Wik, D., Krivonos, R., Jaodand, A. D., Madsen, K. K. 2022, ApJ, 934, 59
“The NuSTAR, XMM-Newton, and Suzaku view of Abell 3395 at the intercluster filament interface,” Tumer, A., Wik, D., Gaspari, M., Akamatsu, H., Westergaard, N., Tombesi, F., Ercan, N. 2022, ApJ, 930, 83
“Young black hole and neutron star systems in the nearby star-forming galaxy M33: the NuSTAR view,” Yang, J., Wik, D., Lehmer, B., West, L., Williams, B., Maccarone, T., Ptak, A., Yukita, M., Vulic, N., Walton, D., Garofali, K., Antoniou, V. 2022, ApJ, 930, 64
“Extending the Baseline for SMC X-1’s Spin and Orbital Behavior with NuSTAR Stray Light,” Brumback, McKinley C., Grefenstette, Brian W., Buisson, Douglas J. K., Bachetti, Matteo, Connors, Riley, García, Javier A., Jaodand, Amruta, Krivonos, Roman, Ludlam, Renee, Madsen, Kristin K., Mastroserio, Guglielmo, Tomsick, John A., Wik, Daniel 2022, ApJ, 926, 187
“NuSTAR measurement of the cosmic X-ray background in the 3-20 keV energy band,” Krivonos, R., Wik, D. Grefenstette, B., Madsen, K., Perez, K., Rossland, S., Sazonov, S., Zoglauer, A., 2021, MNRAS, 502, 3966
“StrayCats: A catalog of NuSTAR Stray Light Observations,” Grefenstette, B., Ludlam, R., Thompson, E., Garcia, J., Hare, J., Jaodand, A., Krivonos, R., Madsen, K., Mastoserio, G., Slaughter, C., Tomsick, J., Wik, D., Zoglauer, A., 2021, ApJ, 909, 30
“NuSTAR Observations of Abell 2163: Constraints on Non-thermal Emission,” R. Rojas Bolivar, D. Wik, S. Giacintucci, F. Gastaldello, A. Hornstrup, N. Westergaard, G. Madejski, 2021, ApJ, 906, 87
“On the X-Ray Spectral Energy Distributions of Star-forming Galaxies: The 0.3-30 keV Spectrum of the Low-metallicity Starburst Galaxy VV 114,” Garofali, K., Lehmer, B., Basu-Zych, A., West, L., Wik, D., Yukita, M., Vulic, N., Ptak, A., Hornschemeier, A., 2021, ApJ, 903, 79
“NuSTAR Tests of Sterile-Neutrino Dark Matter: New Galactic Bulge Observations and Combined Impact,” Roach, Brandon M., Ng, Kenny C. Y., Perez, Kerstin, Beacom, John F., Horiuchi, Shunsaku, Krivonos, Roman, Wik, Daniel R., 2020, PhRvD, 101, 103011
“Discovery of a giant radio fossil in the Ophiuchus galaxy cluster,” Giacintucci, S., Markevitch, M., Johnston-Hollitt, M., Wik, D. R., Wang, Q. H. S., Clarke, T. E., 2020, ApJ, 891, 1
“The Galactic Bulge Diffuse Emission in Broadband X-Rays with NuSTAR,” Perez, Kerstin, Krivonos, Roman, Wik, Daniel R., 2019, ApJ, 884, 153
“Neutron Stars and Black Holes in the Small Magellanic Cloud: The SMC NuSTAR Legacy Survey,” Lazzarini, M., Williams, B. F., Hornschemeier, A. E., Antoniou, V., Vasilopoulos, G., Haberl, F., Vulic, N., Yukita, M., Zezas, A., Bodaghee, A., Lehmer, B. D., Maccarone, T. J., Ptak, A., Wik, D., Fornasini, F. M., Hong, Jaesub, Kennea, J. A., Tomsick, J. A., Venters, T., Udalski, A. Cassity, A., 2019, ApJ, 884, 2
“An ALMA+ACA measurement of the shock in the Bullet Cluster,” Di Mascolo, Luca, Mroczkowski, Tony, Churazov, Eugene, Markevitch, Maxim, Basu, Kaustuv, Clarke, Tracy E., Devlin, Mark, Mason, Brian S., Randall, Scott W., Reese, Erik D., Sunyaev, Rashid, Wik, Daniel R., 2019, A&A 628, A100
“A joint XMM-NuSTAR observation of the galaxy cluster Abell 523: Constraints on inverse Compton emission,” Cova, F., Gastaldello, F., Wik, D. R., Boschin, W., Botteon, A., Brunetti, G., Buote, D. A., De Grandi, S., Eckert, D., Ettori, S., Feretti, L., Gaspari, M., Ghizzardi, S., Giovannini, G., Girardi, M., Govoni, F., Molendi, S., Murgia, M., Rossetti, M., Vacca, V., 2019, A&A 628, A83
“New constraints on sterile neutrino dark matter from NuSTAR M31 observations,” Ng, Kenny C. Y., Roach, Brandon M., Perez, Kerstin, Beacom, John F., Horiuchi, Shunsaku, Krivonos, Roman, Wik, Daniel R., 2019, PhRvD, 99, 083005
“Constraints on the number of X-ray pulsars in IC 10 from a deep XMM-Newton observation,” Yang, J., Laycock, S. G. T., Wik, D. R., 2019, AN, 340, 62
“Evolution of high-mass X-ray binaries in the small magellanic cloud,” Yang, J., Wik, D. R., Zezas, A., Laycock, S. G. T., Hong, J., Xu, R., 2019, AN, 340, 46
“On the Nature of the X-Ray Emission from the Ultraluminous X-Ray Source, M33 X-8: New Constraints from NuSTAR and XMM-Newton,” West, L., Lehmer, B., Wik, D., Yang, J., Walton, D., Antoniou, V., Haberl, F., Hornschemeier, A., Maccarone, T., Plucinsky, P., Ptak, A., Williams, B., Vulic, N., Yukita, M., Zezas, A., 2018, ApJ, 869, 111
“Evidence for Rapid Adiabatic Cooling as an Origin of the Recombining Plasma in the Supernova Remnant W49B Revealed by NuSTAR Observations,” Yamaguchi, H., Tanaka, T., Wik, D., Rho, J., Bamba, A., Castro, D., Smith, R., Foster, A., Uchida, H., Petre, R., Williams, B., 2018, ApJL, 866, L35
“NuSTAR Detection of Nonthermal Bremsstrahlung from the Supernova Remnant W49B,” Tanaka, T., Yamaguchi, H., Wik, D., Aharonian, F., Bamba, A., Castro, D., Foster, A., Petre, R., Rho, J., Smith, R., Uchida, H., Uchiyama, Y., Williams, B., 2018, ApJL, 866, L26
“Anti-correlation between X-ray luminosity and pulsed fraction in the Small Magellanic Cloud pulsar SXP 1323,” Yang, J., Zezas, A., Coe, M., Drake, J., Hong, J., Laycock, S., Wik, D., 2018, MNRAS Letters, 479, 1
“Black Holes and Neutron Stars in Nearby Galaxies: Insights from NuSTAR,” Vulic, N., Hornschemeier, A. E., Wik, D. R., Yukita, M., Zezas, A., Ptak, A. F., Lehmer, B. D., Antoniou, V., Maccarone, T. J., Williams, B. F., Fornasini, F. M., 2018, ApJ, 864, 150
“Non-thermal X-rays from colliding wind shock acceleration in the massive binary Eta Carinae,” Hamaguchi, K., Corcoran, M., Pittard, J., Sharma, N., Takahashi, H., Russell, C., Grefenstette, B., Wik, D., Gull, T., Richardson, N., Madura, T., Moffat, A., 2018, Nature Astronomy, 2, 731
“Young Accreting Compact Objects in M31: The Combined Power of NuSTAR, Chandra, and Hubble,” Lazzarini, M., Hornschemeier, A. E., Williams, B. F., Wik, D., Vulic, N., Yukita, M., Zezas, A., Lewis, A. R., Durbin, M., Ptak, A., Bodaghee, A., Lehmer, B. D., Antoniou, V., Maccarone, T., 2018, ApJ, 862, 28
“Hitomi (ASTRO-H) X-ray Astronomy Satellite,” Takahashi, T., Kokubun, M., Mitsuda, K., et al. 2018, Journal of Astronomical Telescopes, Instruments, and Systems, 4, 021402
“Solar abundance ratios of the iron-peak elements in the Perseus cluster,” Hitomi Collaboration, 2017, Nature, 551, 478
“Discovery of a radio relic in the low mass, merging galaxy cluster PLCK G200.9-28.2,” Kale, R., Wik, D. R., Giacintucci, S., Venturi, T., Brunetti, G., Cassano, R., Dallacasa, D., de Gasperin, F. 2017, MNRAS, 472, 940
“On the absence of radio haloes in clusters with double relics,” Bonafede, A., Cassano, R., Brüggen, M., Ogrean, G. A., Riseley, C. J., Cuciti, V., de Gasperin, F., Golovich, N., Kale, R., Venturi, T., van Weeren, R. J., Wik, D. R., Wittman, D. 2017, MNRAS, 470, 3465
“Identification of the Hard X-ray Source Dominating the E > 25 keV Emission of the Nearby Galaxy M31,” Yukita, M., Ptak, A., Hornschemeier, A., Wik, D., Maccarone, T. J., Pottschmidt, K., Zezas, A., Antoniou, V., Ballhausen, R., Lehmer, B. D., Lien, A., Williams, B., Baganoff, F., Boyd, P. T., Enoto, T., Kennea, J., Page, K. L., Choi, Y. 2017, ApJ, 838, 47
“Hitomi Constraints on the 3.5 keV Line in the Perseus Galaxy Cluster,” Hitomi Collaboration (Aharonian et al.) 2017, ApJ, 837, 15
“The Distribution of Radioactive 44Ti in Cassiopeia A,” Grefenstette, Brian W., Fryer, Chris L., Harrison, Fiona A., Boggs, Steven E., DeLaney, Tracey, Laming, J. Martin, Reynolds, Stephen P., Alexander, David M., Barret, Didier, Christensen, Finn E., Craig, William W., Forster, Karl, Giommi, Paolo, Hailey, Charles J., Hornstrup, Alan, Kitaguchi, Takao, Koglin, J. E., Lopez, Laura, Mao, Peter H., Madsen, Kristin K., Miyasaka, Hiromasa, Mori, Kaya, Perri, Matteo, Pivovaroff, Michael J., Puccetti, Simonetta, Rana, Vikram, Stern, Daniel, Westergaard, Niels J., Wik, Daniel R., Zhang, William W., Zoglauer, Andreas 2017, ApJ, 834, 19
“The NuSTAR Extragalactic Surveys: The Number Counts of Active Galactic Nuclei and the Resolved Fraction of the Cosmic X-Ray Background,” Harrison, F. A., Aird, J., Civano, F., Lansbury, G., Mullaney, J. R., Ballantyne, D. R., Alexander, D. M., Stern, D., Ajello, M., Barret, D., Bauer, F. E., Baloković, M., Brandt, W. N., Brightman, M., Boggs, S. E., Christensen, F. E., Comastri, A., Craig, W. W., Del Moro, A., Forster, K., Gandhi, P., Giommi, P., Grefenstette, B. W., Hailey, C. J., Hickox, R. C., Hornstrup, A., Kitaguchi, T., Koglin, J., Luo, B., Madsen, K. K., Mao, P. H., Miyasaka, H., Mori, K., Perri, M., Pivovaroff, M., Puccetti, S., Rana, V., Treister, E., Walton, D., Westergaard, N. J., Wik, D., Zappacosta, L., Zhang, W. W., Zoglauer, A. 2016, ApJ, 831, 185
“Suzaku X-ray Observations of the Nearest Non-Cool Core Cluster, Antlia: Dynamically Young but with Remarkably Relaxed Outskirts,” Wong, Ka-Wah, Irwin, Jimmy A., Wik, Daniel R., Sun, Ming, Sarazin, Craig L., Fujita, Yutaka, Reiprich, Thomas H. 2016, ApJ, 829, 49
“The quiescent intracluster medium in the core of the Perseus cluster,” Hitomi Collaboration, 2016, Nature, 535, 117
“Demonstrating the likely neutron star nature of five M31 globular cluster sources with Swift-NuSTAR spectroscopy,” Maccarone, T. Yukita, M., Hornschemeier, A., Lehmer, B., Antoniou, V., Ptak, A., Wik, D., Zezas, A., Boyd, P., Kennea, J., Page, K., Eracleous, M., Williams, B., Boggs, S., Christensen, F., Craig, W., Hailey, C., Harrison, F., Stern, D., Zhang, W. 2016, MNRAS, 458, 3633
“A Hard X-ray Study of the Normal Star-Forming Galaxy M83 with NuSTAR,” Yukita, M., Hornschemeier, A. E., Lehmer, B. D., Ptak, A., Wik, D. R., Zezas, A., Antoniou, V., Maccarone, T. J., Replicon, V., Tyler, J. B., Venters, T., Argo, M. K., Bechtol, K., Boggs, S., Christensen, F. E., Craig, W. W., Hailey, C., Harrison, F., Krivonos, R., Kuntz, K., Stern, D., & Zhang, W. W. 2016, ApJ, 824, 107
“A Strong Merger Shock in Abell 665,” Dasadia, S., Sun, M., Sarazin, C., Morandi, A., Markevitch, M., Wik, D., Feretti, L., Giovannini, G., Govoni, F., & Vacca, V. 2016, ApJL, 820, L20
“The NuSTAR Extragalactic Survey: First Direct Measurements of the >10 KeV X-Ray Luminosity Function for Active Galactic Nuclei at z>0.1,” Aird, J., Alexander, D. M., Ballantyne, D. R., Civano, F., Del-Moro, A., Hickox, R. C., Lansbury, G. B., Mullaney, J. R., Bauer, F. E., Brandt, W. N., Comastri, A., Fabian, A. C., Gandhi, P., Harrison, F. A., Luo, B., Stern, D., Treister, E., Zappacosta, L., Ajello, M., Assef, R., Baloković, M., Boggs, S. E., Brightman, M., Christensen, F. E., Craig, W. W., Elvis, M., Forster, K., Grefenstette, B. W., Hailey, C. J., Koss, M., LaMassa, S. M., Madsen, K. K., Puccetti, S., Saez, C., Urry, C. M., Wik, D. R., & Zhang, W. 2015, ApJ, 815, 66
“Dark Matter Line Emission Constraints from NuSTAR Observations of the Bullet Cluster,” Riemer-Sørensen, S., Wik, D. R., Madejski, G., Molendi, S., Gastaldello, F., Harrison, F. A., Craig, W. W., Hailey, C. J., Boggs, S. E., Christensen, F. E., Stern, D., Zhang, W. W., & Hornstrup, A. 2015, ApJ, 810, 48
“The NuSTAR Extragalactic Surveys: Overview and Catalog from the COSMOS Field,” Civano, F., Hickox, R. C., Puccetti, S., Comastri, A., Mullaney, J. R., Zappacosta, L., LaMassa, S. M., Aird, J., Alexander, D. M., Ballantyne, D. R., Bauer, F. E., Brandt, W. N., Boggs, S. E., Christensen, F. E., Craig, W. W., Del-Moro, A., Elvis, M., Forster, K., Gandhi, P., Grefenstette, B. W., Hailey, C. J., Harrison, F. A., Lansbury, G. B., Luo, B., Madsen, K., Saez, C., Stern, D., Treister, E., Urry, M. C., Wik, D. R., & Zhang, W. 2015, ApJ, 808, 185
“The NuSTAR Extragalactic Surveys: Initial Results and Catalog from the Extended Chandra Deep Field South,” Mullaney, J. R., Del-Moro, A., Aird, J., Alexander, D. M., Civano, F. M., Hickox, R. C., Lansbury, G. B., Ajello, M., Assef, R., Ballantyne, D. R., Balokovic´, M., Bauer, F. E., Brandt, W. N., Boggs, S. E., Brightman, M., Christensen, F. E., Comastri, A., Craig, W. W., Elvis, M., Forster, K., Gandhi, P., Grefenstette, B. W., Hailey, C. J., Harrison, F. A., Koss, M., LaMassa, S. M., Luo, B., Madsen, K. K., Puccetti, S., Saez, C., Stern, D., Treister, E., Urry, C. M., Wik, D. R., Zappacosta, L., & Zhang, W. 2015, ApJ, 808, 184
“NuSTAR Observations of the Powerful Radio Galaxy Cygnus A,” Reynolds, C. S., Lohfink, A. M., Ogle, P. M., Harrison, F. A., Madsen, K. K., Fabian, A. C., Wik, D. R., Madejski, G., Ballantyne, D. R., Boggs, S. E., Christensen, F. E., Craig, W. W., Fuerst, F., Hailey, C. J., Lanz, L., Miller, J. M., Saez, C., Stern, D., Walton, D. J., & Zhang, W. 2015, ApJ, 808, 154
“The 0.3-30 keV Spectra of Powerful Starburst Galaxies: NuSTAR and Chandra Observations of NGC 3256 and NGC 3310,” Lehmer, B. D., Tyler, J. B., Hornschemeier, A. E., Wik, D. R., Yukita, M., Antoniou, V., Boggs, S., Christensen, F. E., Craig, W. W., Hailey, C. J., Harrison, F. A., Maccarone, T. J., Ptak, A., Stern, D., Zezas, A., & Zhang, W. W. 2015, ApJ, 806, 126
“Extended hard-X-ray emission in the inner few parsecs of the Galaxy,” Perez, K., Hailey, C. J., Bauer, F. E., Krivonos, R. A., Mori, K., Baganoff, F. K., Barrière, N. M., Boggs, S. E., Christensen, F. E., Craig, W. W., Grefenstette, B. W., Grindlay, J. E., Harrison, F. A., Hong, J., Madsen, K. K., Nynka, M., Stern, D., Tomsick, J. A., Wik, D. R., Zhang, S., Zhang, W. W., & Zoglauer, A. 2015, Nature, 520, 646
“Locating the Most Energetic Electrons in Cassiopeia A,” Grefenstette, B. W., Reynolds, S. P., Harrison, F. A., Humensky, T. B., Boggs, S. E., Fryer, C. L., DeLaney, T., Madsen, K. K., Miyasaka, H., Wik, D. R., Zoglauer, A., Forster, K., Kitaguchi, T., Lopez, L., Nynka, M., Christensen, F. E., Craig, W. W., Hailey, C. J., Stern, D., & Zhang, W. W. 2015, ApJ, 802, 15
“A NuSTAR Observation of the Center of the Coma Cluster,” Gastaldello, F., Wik, D. R., Molendi, S., Westergaard, N. J., Hornstrup, A., Madejski, G., Ferreira, D. D. M., Boggs, S. E., Christensen, F. E., Craig, W. W., Grefenstette, B. W., Hailey, C. J., Harrison, F. A., Madsen, K. K., Stern, D., & Zhang, W. W. 2015, ApJ, 800, 139
“A Focused, Hard X-Ray Look at Arp 299 with NuSTAR,” Ptak, A., Hornschemeier, A., Zezas, A., Lehmer, B., Yukita, M., Wik, D. R., Antoniou, V., Argo, M. K., Ballo, L., Bechtol, K., Boggs, S., Della Ceca, R., Christensen, F. E., Craig, W. W., Hailey, C. J., Harrison, F. A., Krivonos, R., Maccarone, T. J., Stern, D., Tatum, M., Venters, T., & Zhang, W. W. 2015, ApJ, 800, 104
“Source Identification in the IGR J17448-3232 Field: Discovery of the Scorpius Galaxy Cluster,” Barrière, N. M., Tomsick, J. A., Wik, D. R., Chaty, S., & Rodriguez, J. 2015, ApJ, 799, 24
“A Hard X-Ray Power-law Spectral Cutoff in Centaurus X-4,” Chakrabarty, D., Tomsick, J. A., Grefenstette, B. W., Psaltis, D., Bachetti, M., Barret, D., Boggs, S. E., Christensen, F. E., Craig, W. W., Fürst, F., Hailey, C. J., Harrison, F. A., Kaspi, V. M., Miller, J. M., Nowak, M. A., Rana, V., Stern, D., Wik, D. R., Wilms, J., & Zhang, W. W. 2014, ApJ, 797, 92
“Spatially Resolving a Starburst Galaxy at Hard X-Ray Energies: NuSTAR, Chandra, and VLBA Observations of NGC 253,” Wik, D. R., Lehmer, B. D., Hornschemeier, A. E., Yukita, M., Ptak, A., Zezas, A., Antoniou, V., Argo, M. K., Bechtol, K., Boggs, S., Christensen, F., Craig, W., Hailey, C., Harrison, F., Krivonos, R., Maccarone, T. J., Stern, D., Venters, T., & Zhang, W. W. 2014, ApJ, 797, 79
“NuSTAR Observations of the Bullet Cluster: Constraints on Inverse Compton Emission,” Wik, D. R., Hornstrup, A., Molendi, S., Madejski, G., Harrison, F. A., Zoglauer, A., Grefenstette, B. W., Gastaldello, F., Madsen, K. K., Westergaard, N. J., Ferreira, D. D. M., Kitaguchi, T., Pedersen, K., Boggs, S. E., Christensen, F. E., Craig, W. W., Hailey, C. J., Stern, D., & Zhang, W. W. 2014, ApJ, 792, 48
“NuSTAR Study of Hard X-Ray Morphology and Spectroscopy of PWN G21.5-0.9,” Nynka, M., Hailey, C. J., Reynolds, S. P., An, H., Baganoff, F. K., Boggs, S. E., Christensen, F. E., Craig, W. W., Gotthelf, E. V., Grefenstette, B. W., Harrison, F. A., Krivonos, R., Madsen, K. K., Mori, K., Perez, K., Stern, D., Wik, D. R., Zhang, W. W., & Zoglauer, A. 2014, ApJ, 789, 72
“A new candidate Wolf-Rayet X-ray binary in NGC 253,” Maccarone, T. J., Lehmer, B. D., Leyder, J. C., Antoniou, V., Hornschemeier, A., Ptak, A., Wik, D. R., & Zezas, A. 2014, MNRAS, 439, 3064
“NuSTAR Reveals an Intrinsically X-Ray Weak Broad Absorption Line Quasar in the Ultraluminous Infrared Galaxy Markarian 231,” Teng, S. H., Brandt, W. N., Harrison, F. A., Luo, B., Alexander, D. M., Bauer, F. E., Boggs, S. E., Christensen, F. E., Comastri, A., Craig, W. W., Fabian, A. C., Farrah, D., Fiore, F., Gandhi, P., Grefenstette, B. W., Hailey, C. J., Hickox, R. C., Madsen, K. K., Ptak, A. F., Rigby, J. R., Risaliti, G., Saez, C., Stern, D., Veilleux, S., Walton, D. J., Wik, D. R., & Zhang, W. W. 2014, ApJ, 785, 19
“Asymmetries in core-collapse supernovae from maps of radioactive ⁴⁴Ti in CassiopeiaA,” Grefenstette, B. W., Harrison, F. A., Boggs, S. E., Reynolds, S. P., Fryer, C. L., Madsen, K. K., Wik, D. R., Zoglauer, A., Ellinger, C. I., Alexander, D. M., An, H., Barret, D., Christensen, F. E., Craig, W. W., Forster, K., Giommi, P., Hailey, C. J., Hornstrup, A., Kaspi, V. M., Kitaguchi, T., Koglin, J. E., Mao, P. H., Miyasaka, H., Mori, K., Perri, M., Pivovaroff, M. J., Puccetti, S., Rana, V., Stern, D., Westergaard, N. J., & Zhang, W. W. 2014, Nature, 506, 339
“NuSTAR and Chandra Insight into the Nature of the 3-40 keV Nuclear Emission in NGC 253,” Lehmer, B. D., Wik, D. R., Hornschemeier, A. E., Ptak, A., Antoniou, V., Argo, M. K., Bechtol, K., Boggs, S., Christensen, F. E., Craig, W. W., Hailey, C. J., Harrison, F. A., Krivonos, R., Leyder, J.-C., Maccarone, T. J., Stern, D., Venters, T., Zezas, A., & Zhang, W. W. 2013, ApJ, 771, 134
“The Nuclear Spectroscopic Telescope Array (NuSTAR) High-energy X-Ray Mission,” Harrison, F. A., Craig, W. W., Christensen, F. E., Hailey, C. J., Zhang, W. W., Boggs, S. E., Stern, D., Cook, W. R., Forster, K., Giommi, P., Grefenstette, B. W., Kim, Y., Kitaguchi, T., Koglin, J. E., Madsen, K. K., Mao, P. H., Miyasaka, H., Mori, K., Perri, M., Pivovaroff, M. J., Puccetti, S., Rana, V. R., Westergaard, N. J., Willis, J., Zoglauer, A., An, H., Bachetti, M., Barrière, N. M., Bellm, E. C., Bhalerao, V., Brejnholt, N. F., Fuerst, F., Liebe, C. C., Markwardt, C. B., Nynka, M., Vogel, J. K., Walton, D. J., Wik, D. R., Alexander, D. M., Cominsky, L. R., Hornschemeier, A. E., Hornstrup, A., Kaspi, V. M., Madejski, G. M., Matt, G., Molendi, S., Smith, D. M., Tomsick, J. A., Ajello, M., Ballantyne, D. R., Baloković, M., Barret, D., Bauer, F. E., Blandford, R. D., Brandt, W. N., Brenneman, L. W., Chiang, J., Chakrabarty, D., Chenevez, J., Comastri, A., Dufour, F., Elvis, M., Fabian, A. C., Farrah, D., Fryer, C. L., Gotthelf, E. V., Grindlay, J. E., Helfand, D. J., Krivonos, R., Meier, D. L., Miller, J. M., Natalucci, L., Ogle, P., Ofek, E. O., Ptak, A., Reynolds, S. P., Rigby, J. R., Tagliaferri, G., Thorsett, S. E., Treister, E., & Urry, C. M. 2013, ApJ, 770, 103
“Merger shocks in Abell 3667 and the Cygnus A cluster,” Sarazin, C. L., Finoguenov, A., & Wik, D. R. 2013, AN, 334, 346
“Discovery of a Giant Radio Halo in a New Planck Galaxy Cluster PLCKG171.9-40.7,” Giacintucci, S., Kale, R., Wik, D. R., Venturi, T., & Markevitch, M. 2013, ApJ, 766, 18
“The Chandra Multi-wavelength Project: Optical Spectroscopy and the Broadband Spectral Energy Distributions of X-Ray-selected AGNs,” Trichas, M., Green, P. J., Silverman, J. D., Aldcroft, T., Barkhouse, W., Cameron, R. A., Constantin, A., Ellison, S. L., Foltz, C., Haggard, D., Jannuzi, B. T., Kim, D.-W., Marshall, H. L., Mossman, A., Pérez, L. M., Romero-Colmenero, E., Ruiz, A., Smith, M. G., Smith, P. S., Torres, G., Wik, D. R., Wilkes, B. J., & Wolfgang, A. 2012, ApJS, 200, 17
“The Swift Burst Alert Telescope Perspective on Non-thermal Emission in HIFLUGCS Galaxy Clusters,” Wik, D. R., Sarazin, C. L., Zhang, Y.-Y., Baumgartner, W. H., Mushotzky, R. F., Tueller, J., Okajima, T., & Clarke, T. E. 2012, ApJ, 748, 67
“First results from the ground calibration of the NuSTAR flight optics,” Koglin, J. E., An, H., Barrière, N., Brejnholt, N. F., Christensen, F. E., Craig, W. W., Hailey, C. J., Jakobsen, A. C., Madsen, K. K., Mori, K., Nynka, M., Fernandez-Perea, M., Pivovaroff, M. J., Ptak, A., Sleator, C., Thornhill, D., Vogel, J. K., Wik, D. R., & Zhang, W. W. 2011, SPIE, 8147, 81470J
“The Lack of Diffuse, Non-thermal Hard X-ray Emission in the Coma Cluster: The Swift Burst Alert Telescope’s Eye View,” Wik, D. R., Sarazin, C. L., Finoguenov, A., Baumgartner, W. H., Mushotzky, R. F., Okajima, T., Tueller, J., & Clarke, T. E. 2011, ApJ, 727, 119
“The Impact of Non-equipartition on Cosmological Parameter Estimation from Sunyaev-Zel’dovich Surveys,” Wong, K.-W., Sarazin, C. L., & Wik, D. R. 2010, ApJ, 719, 1
“XMM-Newton Observation of the Northwest Radio Relic Region in A3667,” Finoguenov, A., Sarazin, C. L., Nakazawa, K., Wik, D. R., & Clarke, T. E. 2010, ApJ, 715, 1143
“A Suzaku Search for Nonthermal Emission at Hard X-Ray Energies in the Coma Cluster,” Wik, D. R., Sarazin, C. L., Finoguenov, A., Matsushita, K., Nakazawa, K., & Clarke, T. E. 2009, ApJ, 696, 1700
“Hard X-Ray Properties of the Merging Cluster Abell 3667 as Observed with Suzaku,” Nakazawa, K., Sarazin, C. L., Kawaharada, M., Kitaguchi, T., Okuyama, S., Makishima, K., Kawano, N., Fukazawa, Y., Inoue, S., Takizawa, M., Wik, D. R., Finoguenov, A., & Clarke, T. E. 2009, PASJ, 61, 339
“The Impact of Galaxy Cluster Mergers on Cosmological Parameter Estimation from Surveys of the Sunyaev-Zel’dovich Effect,” Wik, D. R., Sarazin, C. L., Ricker, P. M., & Randall, S. W. 2008, ApJ, 680, 17
“Hard X-Ray-emitting Active Galactic Nuclei Selected by the Chandra Multiwavelength Project,” Silverman, J. D., Green, P. J., Barkhouse, W. A., Kim, D.-W., Aldcroft, T. L., Cameron, R. A., Wilkes, B. J., Mossman, A., Ghosh, H., Tananbaum, H., Smith, M. G., Smith, R. C., Smith, P. S., Foltz, C., Wik, D. R., & Jannuzi, B. T. 2005, ApJ, 618, 123
“The Chandra Multiwavelength Project: Optical Follow-up of Serendipitous Chandra Sources,” Green, P. J., Silverman, J. D., Cameron, R. A., Kim, D.-W., Wilkes, B. J., Barkhouse, W. A., LaCluyzé, A., Morris, D., Mossman, A., Ghosh, H., Grimes, J. P., Jannuzi, B. T., Tananbaum, H., Aldcroft, T. L., Baldwin, J. A., Chaffee, F. H., Dey, A., Dosaj, A., Evans, N. R., Fan, X., Foltz, C., Gaetz, T., Hooper, E. J., Kashyap, V. L., Mathur, S., McGarry, M. B., Romero-Colmenero, E., Smith, M. G., Smith, P. S., Smith, R. C., Torres, G., Vikhlinin, A., & Wik, D. R. 2004, ApJS, 150, 43
“GRB 000418: A Hidden Jet Revealed,” Berger, E., Diercks, A., Frail, D. A., Kulkarni, S. R., Bloom, J. S., Sari, R., Halpern, J., Mirabal, N., Taylor, G. B., Hurley, K., Pooley, G., Becker, K. M., Wagner, R. M., Terndrup, D. M., Statler, T., Wik, D. R., Mazets, E., & Cline, T. 2001, ApJ, 556, 556

Invited Colloqiua, Seminars, & Workshops

2024: Department Colloquium at Iowa State University
2022: Department Colloquium at Howard University
2021: Astronomy Group Seminar at Ohio University
2021: Department Colloquium at SUNY Brockport
2021: High Energy Physics Seminar at the Harvard-Smithsonian Center for Astrophysics
2020: APS Four Corners Meeting
2020: Astronomy Seminar at Iowa State University
2019: “Galaxy Cluster Science with the FORCE mission,” FORCE Workshop, NASA GSFC
2019: Department Colloquium at Idaho State University
2018: APS Four Corners Meeting Invited Plenary Speaker
2018: Galaxies and Cosmology Seminar at the Harvard-Smithsonian Center for Astrophysics
2017: Department Colloquia at the University of Oklahoma, University of North Dakota, and University of Alabama

Conference Proceedings & Presentations

“Galaxy Cluster-based Evidence from NuSTAR for Miscalibration in the Hard Bands of XMM-Newton and Chandra?,” 2024, 16th IACHEC Meeting, Parador de La Granja, Spain
“The NuSTAR Perspective on the Chandra/XMM-Newton Temperature Discrepancy in Galaxy Clusters,” 2023, X-ray Universe Meeting, Athens, Greece
“Galaxy Cluster Temperatures from NuSTAR, Chandra, and XMM-Newton,” 2023, 15th IACHEC Meeting, Seeblick Pelham, Germany
“Excess Hard Emission in the Heart of the Virgo Cluster seen with NuSTAR,” 2023, High Energy Astrophysics Division (HEAD) Meeting #20, Kona, HI
“Hard Bandpass Extension and Cross-Calibration with PV XRISM Observations of the Coma Cluster,” 2022, XRISM Science Workshop, Tsukuba, Japan
“Characterizing the Hard X-ray Binary Population of M31,” 2022, NuSTAR Science Meeting 2022: Ten Years of the High Energy Universe in Focus, Cagliari, Italy
“The NuSTAR Perspective on the Chandra/XMM-Newton Temperature Discrepancy in Galaxy Clusters,” 2022, IACHEC, Spring Virtual Workshop
“Characterizing the Hard X-ray Binary Population of the Disk of M31,” 2022, High Energy Astrophysics Division (HEAD) Meeting #19, Monterey, CA
“When Galaxy Clusters Collide: Recent Results from the NuSTAR and Chandra X-ray Observatories,” APS Four Corners Meeting Invited Speaker and Session Chair, Albuquerque, NM (virtual), October 23rd, 2020
“The X-ray Background Emission of the Galactic Center and Bulge with NuSTAR,” 2020, Kuznetsova, E., Krivonos, R., Perez, K., Wik, D., Astronomical Society of the Pacific Conference Series (ASPCS): New Horizons in Galactic Center Astronomy and Beyond, arXiv:2008.12393
High Energy Astrophysics Division (HEAD) Meeting #18 (September 13-17, 2020, Tucson, AZ; would have presented, but conference cancelled due to COVID-19)
“Heating and Acceleration at Galaxy Cluster Shocks: Insights from NuSTAR,” 2019, X-ray Universe 2019, Bologna, Italy
“Broadband, spatially-resolved temperature constraints in galaxy clusters,” 2019, Astrophysics of hot plasma in extended X-ray sources XMM-Newton Workshop, Madrid, Spain
“Heating and Acceleration at Galaxy Cluster Shocks: Insights from NuSTAR,” 2019, High Energy Astrophysics Division (HEAD) Meeting #17, Monterey, CA
“A Figure of Merit for X-ray Survey Missions,” Wik et al., 2018, SPIE Meeting, Austin, TX
“Electron Heating at Galaxy Cluster Shocks: Insights from NuSTAR,” 2018, SnowCluster: the Physics of Galaxy Clusters, Snowbird, UT
“Electron Heating at Galaxy Cluster Shocks: Insights from NuSTAR,” 2017, High Energy Astrophysics Division (HEAD) Meeting #16, Sun Valley, ID
“Electron Heating at Galaxy Cluster Shocks: Measuring Shock Temperatures with NuSTAR,” 2017, Clusters of Galaxies: Physics and Cosmology, Bern, Switzerland
“Inverse Compton Searches at Hard X-ray Eenrgies with NuSTAR,” 2017, Diffuse Synchrotron Emission in Clusters of Galaxies - What is Next?, Leiden, Netherlands
“Characterizing the First Galaxy Clusters at the Epoch of their Formation with STAR-X,” 2017, ESO Early stages of Galaxy Cluster Formation, Garching, Germany
“Heating and Acceleration of Galaxy Cluster Shocks: Insights from NuSTAR,” 2017, Marseille Cosmology Conference, Aix en Provence, France
“Electron Heating at Galaxy Cluster Shocks: Measuring the Temperature of the Bullet Cluster Shock with NuSTAR,” 2017, American Astronomical Society Meeting #229, Grapevine, TX
“Galaxy Clusters with NuSTAR and HEX-P,” 2016, NuSTAR Science Meeting, Pasadena, CA
“A New Deep, Hard X-ray Survey of M31,” 2016, High Energy Astrophysics Division (HEAD) Meeting #15, Naples, FL
“NuSTAR Legacy Survey of Local Group Galaxies,” 2016, High Energy Astrophysics Division (HEAD) Meeting #15 (Town Hall Talk), Naples, FL
“A New Deep, Hard X-ray Survey of M31: Monitoring Black Hole and Neutron Star Accretion States in the XRB Population of our Nearest Neighbor,” 2016, American Astronomical Society Meeting #227, Kissimee, FL
“The NuSTAR Galaxy Cluster Program and Recent Results,” 2015, Astroparticle View of Galaxy Clusters, Hiroshima, Japan
“NuSTAR Observations of Galaxy Clusters,” 2015, Snowcluster, Snowbird, UT
“The NuSTAR Galaxy Cluster Program and Recent Results,” 2014, 8th Korean Astrophysics Workshop on Astrophysics of High-Beta Plasma in the Universe, Jeju Island, Korea
“NuSTAR Observations of Galaxy Clusters,” 2015, American Astronomical Society Meeting #225, Seattle, WA
“Discovery of a Nearby, Massive Galaxy Cluster Behind the Galactic Bulge with the XMM-Newton Observatory,” 2014, The X-ray Universe 2014, Dublin, Ireland
“The Bullet Cluster: The Power of Hard X-rays to Constrain Cluster Merger Physics,” 2014, NuSTAR Science Meeting, Columbia, NY
“Starburst Galaxy NGC 253 in a Hard (X-ray) Light: Resolving its Emission with NuSTAR,” 2014, American Astronomical Society Meeting #223, Washington, DC
“NuSTAR’s Hard Look at the Bullet Cluster: First Results,”2013, High Energy Astrophysics Division (HEAD) Meeting #13, Monterey, CA
“NuSTAR’s Hard Look at the Bullet Cluster: First Results,” 2013, Snowcluster, Snowbird, UT
“Current Results from Observations of the Bullet Cluster,” 2013, NuSTAR Science Team Meeting, Pasadena, CA
“NuSTAR’s Hard Look at Clusters and Relics: Bullet Cluster First Results,” 2013, American Astronomical Society Meeting #221
“XMM-Newton Mosaic of the Perseus Clusters: Surface Brightness Fluctuations Confirm Clumping?,” 2012, Energetic Astronomy, Annapolis, MD
“Searching for Non-thermal X-rays in the Brightest X-ray and Radio Galaxy Clusters,” 2012, American Astronomical Society Meeting #219, Austin, TX
“Clumping in Cluster Outskirts: Measuring their Statistical Signature with XMM-Newton,” 2011, SZX Huntsville, Huntsville, AL
“Cluster Cosmology: Is the ICM in HSE?,” 2011, Alpine Cosmology Conference, Austrian Alps
“Toward measuring the size-scale of clumping in the outskirts of clusters,” Wik, D. R., 2011, A New Era for SZ Science, Santander, Spain
“Swift BAT Search for Non-thermal Emission in HIFLUGCS Clusters,” 2011, Non-thermal Phenomena in Colliding Galaxy Clusters, Memorie della Società Astronomica Italiana, 82, 523
“Impact of Mergers on the Intracluster Medium of Galaxy Clusters,” 2010, American Astronomical Society Meeting #215, Washington, DC
“The Nature of Extended Hard X-ray Emission from the Coma Cluster as Observed by the Swift BAT,” 2010, High Energy Astrophysics Division (HEAD) Meeting #11, Kona, Hawaii
“The Merger Dynamics of the Cygnus A Cluster: Direct Detection of the Subcluster Infall Velocity,” Wik, D. R. & Sarazin, C. 2010, in The Energetic Cosmos: from Suzaku to Astro-H, JAXA-SP-09-008E, ed. K. Makishima (Tokyo: JAXA), 88, Otaru, Japan
“XMM-Newton, Suzaku, & Swift Limits on Non-thermal Hard X-ray Emission in the Coma Cluster,” 2009, New Paths in Studies of Galaxy Clusters, Bavaria, Germany
“The Continued Search for Non-thermal Hard X-ray Emission in the Coma and Abell 3667 Galaxy Clusters,” 2008, High Energy Astrophysics Division (HEAD) Meeting #10, Los Angeles, CA
“A Suzaku Search for Non-thermal Emission at Hard X-ray Energies in the Coma Cluster,” 2007, Suzaku X-ray Universe Meeting, San Diego, CA
“The Effect of Galaxy Cluster Mergers on Observations of the Sunyaev-Zel’dovich Effect,” 2006, High Energy Astrophysics Division (HEAD) Meeting #9, San Francisco, CA
“Classifying Serendipitous Sources for the ChaMP,” 2002, American Astronomical Society Meeting #201, Seattle, WA
“Brown Dwarfs in the NOAO Deep Wide Field Survey,” 2001, American Astronomical Society Meeting #199, Washington, DC
“A Rapidly Evolving Loose Group of Galaxies,” 2001, American Astronomical Society Meeting #199, Washington, DC

Professional Societies

2003-present: Sigma Xi Scientific Research Society
2003-present: Phi Beta Kappa Society
2001-present: American Astronomical Society
2009-present: High Energy Astrophysics Division, AAS
2002-2003: Sigma Pi Sigma National Physics Honor Society

Teaching Experience

Spring 2023 & 2024: ASTR 6410: Introduction to Astronomy Research, University of Utah
Fall 2020 & 2021 & 2024: ASTR/PHYS 3070 (previously 2500): Foundations of Astronomy, University of Utah
Spring 2020: ASTR/PHYS 5590: High Energy Astrophysics, University of Utah
Fall 2018 & 2019 & 2022 & 2023: ASTR/PHYS 1060: The Universe, University of Utah
Spring 2018 & 2019 & 2021: ASTR/PHYS 4080: Introduction to Cosmology, University of Utah
Summer 2008: ASTR 348: Introduction to Cosmology, University of Virginia
2003-4: Oral English Teacher at Private Boarding Schools, Grades 6-12, in Suzhou & Mianyang, China

Students and Postdocs Supervised

2024-present: Sumitra Dhileepkumar, Undergrad
2024-present: Emma Robinson, Undergrad
2023-present: Fiona Lopez, Undergrad (Summer REU Program)
2022-present: Sunny Rasmussen, Undergrad
2022-present: Eliza Diggins, Undergrad / Post-Bacc
2021-present: Samantha Creech, Grad Student
2021-present: Christian Norseth, Undergrad / Post-Bacc / Grad Student
2020-2022: Mick (Maya) Wagner, Undergrad
2020-present: Cicely Potter, Grad Student
2020-2022: Nathan Richardson, Undergrad
2019-present: Hannah Moon (Fritze), Grad Student
2019-2022: Aysegul Tumer, Postdoc
2019-2022: Qian Wang, Postdoc
2018-2021: Vivek Vankayalapati, Undergrad
2017-2024: Randall Rojas-Bolivar, Grad Student / Postdoc
2017-2023: Steve Rossland, Grad Student / Postdoc
2020-2021: Anna Stephens, Undergrad
2019: Vivian Carvajal, Summer REU program
2019: Sage Yeager, Undergrad
2019-2020: Chandler Bass, Undergrad
2019-2020: Logan Kelley, Undergrad, Senior Honors Thesis advisor: “Weighing Abell 2029: How Different Assumption Change a Galaxy Cluster’s Mass”
2018-2019: Sarina Etheridge, Grad Student, completed MS degree
2017-2019: Jun Yang, Postdoc
2017-2018: Cole Takasuki, Undergrad, Senior Honors Thesis advisor: “Benchmarking of the Active Shielding Particle Pusher with Theoretical Models”

Public Outreach & Education

September 2023: Idaho Astronomical Society, “Observing the Universe in X-rays,” Bruneau Dunes State Park, ID
April 2023: Osher Guest Lecturer
March 2023: Astronomy on Tap Salt Lake City, “Anecdotes on the design, calibration, and science of the NuSTAR X-ray Observatory”
March 2022: Utah Humanities Community Conversations panelist, discussing the topic “UFOs and Extra-terrestrial Intelligent Life: Do We Believe?”
September 2019: “Reflections on 20 Years of XMM-Newton’s X-ray Astronomy” NASA-produced YouTube video, one of the interviewees featured
- https://www.youtube.com/watch?v=aqxutnKohck
August 2019: Utah Astronomy Club Public Talk
- https://the-nightly-news.com/blog/blog-87-secrets-of-the-high-energy-x-ray-unverse
- https://www.deseret.com/2019/9/2/20841051/joe-bauman-utah-scientists-daniel-wik-helps-unlock-x-ray-secrets-of-the-universe
July 2018: Interview on Utah Public Radio:
- http://www.upr.org/post/nasas-nustar-telescope-enables-scientists-learn-about-cosmic-rays
Fall 2017, Spring & Fall 2019, Spring 2021, Fall 2022: Undergraduate Seminar Talk
July 2018: REU Program Research Talk
Taft-Nicholson Center Public Talk (2017, 2019, 2022) and Guest Lecturer (2018)
2014-2017: NASA AskAstro responder
October 2012: Interview on NASA’s Blueshift Podcast
Fall 2011: National Capital Astronomers Public Talk
Spring 2005 & Fall 2007: Charlottesville Astronomical Society Public Talk
Fall 2007: Jefferson Institute for Lifelong Learning Public Talk