Daniel Ryan Wik

NASA Goddard Space Flight Center (GSFC) | Code 662 | 8800 Greenbelt Road | Greenbelt, MD 20771
(301) 286-6258 | daniel.r.wik@nasa.gov

Education

Research Positions

Awards and Honors

Successful Observing Proposals

Professional Societies

Department & Community Service

Teaching Experience

Instructor

Teaching Assistant

Public Outreach & Education

Public Talks

Refereed Publications

  1. "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

  2. "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

  3. "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

  4. "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

  5. "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

  6. "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

  7. "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

  8. "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

  9. "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

  10. "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

  11. "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

  12. "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

  13. "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

  14. "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

  15. "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

  16. "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

  17. "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

  18. "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

  19. "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

  20. "Merger shocks in Abell 3667 and the Cygnus A cluster," Sarazin, C. L., Finoguenov, A., & Wik, D. R. 2013, AN, 334, 346

  21. "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

  22. "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

  23. "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

  24. "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

  25. "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

  26. "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

  27. "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

  28. "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

  29. "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

  30. "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

  31. "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

  32. "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

  33. "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

Conference Proceedings & Presentations

Invited Talks

  1. "The NuSTAR Galaxy Cluster Program and Recent Results," Wik, D. R. and the NuSTAR Galaxy Cluster team 2015, Astroparticle View of Galaxy Clusters, Hiroshima, Japan

  2. "NuSTAR Observations of Galaxy Clusters," Wik, D. R. and the NuSTAR Galaxy Cluster team 2015, Snowcluster, Snowbird, UT

  3. "The NuSTAR Galaxy Cluster Program and Recent Results," Wik, D. R. and the NuSTAR Galaxy Cluster team 2014, 8th Korean Astrophysics Workshop on Astrophysics of High-Beta Plasma in the Universe, Jeju Island, Korea

  4. "XMM-Newton, Suzaku, & Swift Limits on Non-thermal Hard X-ray Emission in the Coma Cluster," Wik, D. R., Sarazin, C., Finoguenov, A., Nakazawa, K., Okajima, T., Mushotzky, R., Clarke, T., Tueller, J., & Markwardt, C. 2009, New Paths in Studies of Galaxy Clusters, Bavaria, Germany

Contributed Presentations

  1. "NuSTAR Observations of Galaxy Clusters," Wik, D. R. & the NuSTAR team, American Astronomical Society, AAS Meeting #225, Seattle, WA, talk

  2. "Discovery of a Nearby, Massive Galaxy Cluster Behind the Galactic Bulge with the XMM-Newton Observatory," Wik, D. R., Barrière, N., Tomsick, J., Boggs, S., Chaty, S., Rodriguez, J. 2014, The X-ray Universe 2014, Dublin, Ireland, talk

  3. "Starburst Galaxy NGC 253 in a Hard (X-ray) Light: Resolving its Emission with NuSTAR," Wik, D. R. and the NuSTAR starburst galaxy team, American Astronomical Society, AAS Meeting #223, Washington, DC, talk

  4. "NuSTAR's Hard Look at the Bullet Cluster: First Results," Wik, D. R. 2013, High Energy Astrophysics Division (HEAD) Meeting #13, Monterey, CA, talk

  5. "NuSTAR's Hard Look at the Bullet Cluster: First Results," Wik, D. R. 2013, Snowcluster, Snowbird, UT, talk

  6. "NuSTAR's Hard Look at Clusters and Relics: Bullet Cluster First Results," Wik, D. R. 2013, American Astronomical Society, AAS Meeting #221, poster

  7. "XMM-Newton Mosaic of the Perseus Clusters: Surface Brightness Fluctuations Confirm Clumping?," Wik, D. R. 2012, Energetic Astronomy, Annapolis, MD, talk

  8. "Searching for Non-thermal X-rays in the Brightest X-ray and Radio Galaxy Clusters," 2012, American Astronomical Society Meeting #219, Austin, TX, talk

  9. "Clumping in Cluster Outskirts: Measuring their Statistical Signature with XMM-Newton," Wik, D. R. 2011, SZX Huntsville, Huntsville, AL, talk

  10. "Cluster Cosmology: Is the ICM in HSE?," Wik, D. R., 2011, Alpine Cosmology Conference, Austrian Alps, talk

  11. "Toward measuring the size-scale of clumping in the outskirts of clusters," Wik, D. R., 2011, A New Era for SZ Science, Santander, Spain, talk

  12. "Swift BAT Search for Non-thermal Emission in HIFLUGCS Clusters," Wik, D. R. 2011, Non-thermal Phenomena in Colliding Galaxy Clusters, Memorie della Società Astronomica Italiana, 82, 523, talk

  13. "Impact of Mergers on the Intracluster Medium of Galaxy Clusters," Wik, D. R. 2010, American Astronomical Society Meeting #215, Washington, DC, dissertation talk

  14. "The Nature of Extended Hard X-ray Emission from the Coma Cluster as Observed by the Swift BAT," Wik, D. R., Sarazin, C., Okajima, T., Finoguenov, A., Mushotzky, R., Tueller, J., Clarke, T. 2010, High Energy Astrophysics Division (HEAD) Meeting #11, Kona, Hawaii, poster

  15. "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, poster

  16. "The Continued Search for Non-thermal Hard X-ray Emission in the Coma and Abell 3667 Galaxy Clusters," Wik, D. R. Sarazin, C., Nakazawa, K, Finoguenov, A., Kawaharada, M., Kitaguchi, T., Okuyama, S., Matsushita, K., & Clarke, T. 2008, High Energy Astrophysics Division (HEAD) Meeting #10, Los Angeles, CA, talk

  17. "A Suzaku Search for Non-thermal Emission at Hard X-ray Energies in the Coma Cluster," Wik, D. R., Sarazin, C., Finoguenov, A., Matsushita, K., Nakazawa, K., & Clarke, T. 2007, Suzaku X-ray Universe Meeting, San Diego, CA, poster

  18. "The Effect of Galaxy Cluster Mergers on Observations of the Sunyaev-Zel'dovich Effect," Wik, D. R., Sarazin, C., Ricker, P., & Randall, S. 2006, High Energy Astrophysics Division (HEAD) Meeting #9, San Francisco, CA, poster

  19. "Classifying Serendipitous Sources for the ChaMP," Wik, D. R., Silverman, J., Green, P., & ChaMP Collaboration 2002, American Astronomical Society Meeting #201, Seattle, WA, poster

  20. "Brown Dwarfs in the NOAO Deep Wide Field Survey," Wik, D. R., Najita, J., Dey, A., & Jannuzi, B. 2001, American Astronomical Society Meeting #199, Washington, DC, poster

  21. "A Rapidly Evolving Loose Group of Galaxies," Statler, T. S., Wik, D. R., Yang, C., van Gorkom, J., Liu, C., & Terndrup, D. M. 2001, American Astronomical Society Meeting #199, Washington, DC, poster

Additional Presentations

  1. "Extragalactic X-ray binaries from 0.5-30 keV with Chandra and NuSTAR," Hornschemeier, A. E., Lehmer, B., Yukita, M., Wik, D. R., Ptak, A., Tyler, J., Zezas, A., Maccarone, T., Venters, T. M., Bechtol, K., Argo, M., Harrison, F., Stern, D., & NuSTAR Team 2015, American Astronomical Society Meeting Abstracts, 225, #425.06

  2. "Broadband Spectral Modeling of NGC 253 from Hard X-rays to TeV Gamma Rays," Venters, T. M., Wik, D. R., Lehmer, B., Hornschemeier, A. E., Yukita, M., Ptak, A., Zezas, A., Antoniou, V., Argo, M., Bechtol, K., Boggs, S. E., Christensen, F., Craig, W. W., Hailey, C. J., Harrison, F., Krivonos, R., Maccarone, T. J., Stern, D., & Zhang, W. 2015, American Astronomical Society Meeting Abstracts, 225, #425.03

  3. "The 0.3-30 keV spectra of Powerful Starburst Galaxies: NuSTAR and Chandra observations ofNGC 3256 and NGC 3310," Tyler, J., Lehmer, B., Hornschemeier, A. E., Yukita, M., Wik, D. R., Ptak, A., Stern, D., Harrison, F., Maccarone, T., Zezas, A., Antoniou, V., & NuSTAR Starburst Team 2015, American Astronomical Society Meeting Abstracts, 225, #345.33

  4. "X-ray Observations of the Outskirts of the Nearest Non-Cool Core Cluster: the Antlia Cluster," Wong, K.-W., Irwin, J., & Wik, D. R. 2015, American Astronomical Society Meeting Abstracts, 225, #321.01

  5. "Merger Activity and Radio Emission Within A2061," Bailey, A., Sarazin, C. L., Clarke, T. E., Chatzikos, M., Hogge, T., Wik, D. R., Rudnick, L., Farnsworth, D., Van Weeren, R. J., & Brown, S. 2015, American Astronomical Society Meeting Abstracts, 225, #252.19

  6. "A Hard Look at Starburst Galaxies with NuSTAR -NuSTAR Starbursts -," Ptak, A., Hornschemeier, A., Lehmer, B., Wik, D. R., Yukita, M., & NuSTAR Starburst Team 2014, Suzaku-MAXI 2014: Expanding the Frontiers of the X-ray Universe, 291

  7. "A NuSTAR Perspective on the Star-forming Galaxy M83," Yukita, M., Lehmer, B., Wik, D. R., Hornschemeier, A. E., Ptak, A., Antoniou, V., Argo, M., Bechtol, K., Harrison, F., Krivonos, R., Maccarone, T. J., Stern, D., Tatum, M., Venters, T. M., & Zhang, W. 2014, AAS/High Energy Astrophysics Division, 14, #403.06

  8. "X-ray Observations of the Outskirts of the Nearest Non-Cool Core Cluster: the Antlia Cluster," Wong, K.-W., Irwin, J., & Wik, D. R. 2014, AAS/High Energy Astrophysics Division, 14, #111.07

  9. "In Search of AGN in Starburst Galaxies with NuSTAR," Ptak, A., Hornschemeier, A. E., Zezas, A., Antoniou, V., Argo, M., Bechtol, K., Harrison, F., Krivonos, R., Lehmer, B., Maccarone, T. J., Stern, D., Venters, T. M., Wik, D. R., Yukita, M., Zhang, W., & Tatum, M. 2014, AAS/High Energy Astrophysics Division, 14, #110.11

  10. "A Hard X-ray View of Starburst Galaxies with NuSTAR," Lehmer, B., Wik, D. R., Yukita, M., Hornschemeier, A., Ptak, A., & NuSTAR Starburst Team 2014, The X-ray Universe 2014, 271

  11. "XMM-Newton and Chandra Observations of the Remarkable Dynamics of the Intracluster Medium and Radio Sources in the Clusters Abell 2061 and 3667," Sarazin, C., Hogge, T., Chatzikos, M., Wik, D. R., Giacintucci, S., Clarke, T., Wong, K., Gitti, M., & Finoguenov, A. 2014, The X-ray Universe 2014, 181

  12. "NuSTAR Imaging of Pulsar Wind Nebulae MSH 15-52 and the Crab," Madsen, K., Reynolds, S. P., Harrison, F., Grefenstette, B., Miyasaka, H., Stern, D., Zoglauer, A., Boggs, S. E., Fryer, C., Hailey, C. J., Nynka, M., Kaspi, V. M., An, H., Kitaguchi, T., Forster, K., Craig, W. W., & Wik, D. R. 2014, American Astronomical Society Meeting Abstracts #223, 223, #438.21

  13. "NuSTAR/XMM-Newton Detection of a Hard Cut-Off in Cen X-4," Chakrabarty, D., Tomsick, J., Grefenstette, B., Barret, D., Boggs, S. E., Christensen, F., Craig, W. W., Hailey, C. J., Harrison, F., Psaltis, D., Stern, D., Wik, D. R., & Zhang, W. 2014, American Astronomical Society Meeting Abstracts #223, 223, #438.19

  14. "In Search of AGN in Starburst Galaxies with NuSTAR," Ptak, A., Hornschemeier, A. E., Zezas, A., Antoniou, V., Argo, M., Bechtol, K., Harrison, F., Krivonos, R., Lehmer, B., Leyder, J., Maccarone, T. J., Stern, D., Venters, T. M., Wik, D. R., Yukita, M., & Zhang, W. 2014, American Astronomical Society Meeting Abstracts #223, 223, #438.16

  15. "NuSTAR Effective Area Calibration," Markwardt, C., Madsen, K., An, H., Barriere, N., Brejholt, N. F., Christensen, F., Craig, W. W., Forster, K., Fuerst, F., Grefenstette, B., Hailey, C. J., Harrison, F., Kitaguchi, T., Miyasaka, H., Nynka, M., Pivovaroff, M., Rana, V., Vogel, J., Walton, D., Westergaard, N., Wik, D. R., Zhang, S., Zoglauer, A., & NuSTAR Team 2014, American Astronomical Society Meeting Abstracts #223, 223, #438.15

  16. "A NuSTAR Perspective on the X-ray Binary Populations of Starburst Galaxies," Yukita, M., Lehmer, B., Wik, D. R., Hornschemeier, A. E., Ptak, A., Antoniou, V., Argo, M., Bechtol, K., Harrison, F., Krivonos, R., Leyder, J., Maccarone, T. J., Stern, D., Venters, T. M., Zezas, A., Zhang, W., & NuSTAR Team 2014, American Astronomical Society Meeting Abstracts #223, 223, #438.07

  17. "A Hard X-ray View of Starburst Galaxies with NuSTAR," Hornschemeier, A. E., Wik, D. R., Lehmer, B., Ptak, A., Antoniou, V., Argo, M., Bechtol, K., Harrison, F., Krivonos, R., Leyder, J., Maccarone, T., Stern, D., Venters, T. M., Yukita, M., Zezas, A., Zhang, W., & NuSTAR Team 2014, American Astronomical Society Meeting Abstracts #223, 223, #410.03

  18. "A Hard X-ray View of Starburst Galaxies with NuSTAR," Lehmer, B., Harrison, F. A., Wik, D. R., Hornschemeier, A., Yukita, M., Antoniou, V., Argo, M., Bechtol, K., Maccarone, T., Stern, D., Venters, T., Zezas, A., Zhang, W., Leyder, J.-C., Krivonos, R., & Ptak, A. 2014, 40th COSPAR Scientific Assembly, 40, 1779

  19. "NuSTAR First Pulsar-wind Nebulae Results," Madsen, K., An, H., Boggs, S. E., Craig, W. W., Fryer, C., Grefenstette, B., Hailey, C. J., Humensky, B., Kaspi, V. M., Lopez, L. A., Miyasaka, H., Mori, K., Nynka, M., Pivovaroff, M., Reynolds, S. P., Kitaguchi, T., Westergaard, N. J., Wik, D. R., Zoglauer, A., Christensen, F., Harrison, F., Stern, D., & Zhang, W. 2013, AAS/High Energy Astrophysics Division, 13, #400.05

  20. "A Hard X-ray View of Star Formation: NGC 253 in Focus," Hornschemeier, A. E., Lehmer, B., Wik, D. R., Argo, M., Bechtol, K., Boggs, S., Christensen, F., Craig, W. W., Hailey, C. J., Harrison, F., Leyder, J., Maccarone, T. J., Ptak, A., Stern, D., Venters, T. M., & Zezas, A. 2013, AAS/High Energy Astrophysics Division, 13, #201.04

  21. "Getting a Good, Hard X-ray Look at Starburst Galaxies with NuSTAR," Ptak, A., Argo, M., Bechtol, K., Boggs, S. E., Christensen, F., Craig, W. W., Hailey, C. J., Harrison, F., Hornschemeier, A. E., Lehmer, B., Leyder, J., Maccarone, T. J., Stern, D., Venters, T. M., Wik, D. R., Zezas, A., Zhang, W., & NuSTAR Team 2013, AAS/High Energy Astrophysics Division, 13, #120.15

  22. "Hard X-ray emission from Starburst Galaxies with the NuSTAR Mission," Hornschemeier, A., Argo, M., Bechtol, K., Boggs, S., Christensen, F., Craig, W., Hailey, C., Harrison, F., Lehmer, B., Leyder, J.-C., Maccarone, T., Ptak, A., Stern, D., Venters, T., Wik, D. R., Zezas, A., & Zhang, W. 2013, APS Meeting Abstracts, 14007

  23. "Commissioning and In-flight Calibration of the Nuclear Spectroscopic Telescope Array (NuSTAR)," Miyasaka, H., HongJun, A., Bachetti, M., Bellm, E., Bhalerao, V., Boggs, S. E., Balokovic, M., Cook, R., Christensen, F., Craig, W. W., Forster, K., Fuerst, F., Grefenstette, B., Harrison, F., Hailey, C. J., Kitaguchi, T., Lu, T., Madsen, K., Mao, P. H., Nynka, M., Perri, M., Puccetti, S., Rana, V., Stern, D., Walton, D., Westergaard, N. J., Wik, D. R., Zhang, W., Zoglauer, A., & NuSTAR Team 2013, American Astronomical Society Meeting Abstracts #221, 221, #244.24

  24. "NuSTAR, Chandra, and VLBA Monitoring of the X-ray Binary Population in NGC 253," Lehmer, B., Wik, D. R., Argo, M., Bechtol, K., Boggs, S. E., Christensen, F., Craig, W., Hailey, C. J., Harrison, F., Hornschemeier, A. E., Leyder, J., Maccarone, T., Ptak, A., Stern, D., Venters, T. M., Zezas, A., Zhang, W., & NuSTAR Team 2013, American Astronomical Society Meeting Abstracts #221, 221, #244.22

  25. "Getting a Good, Hard X-ray Look at Starburst Galaxies with NuSTAR," Ptak, A., Argo, M., Bechtol, K., Boggs, S. E., Christensen, F., Craig, W., Hailey, C. J., Harrison, F., Hornschemeier, A. E., Lehmer, B., Leyder, J., Maccarone, T., Stern, D., Venters, T. M., Wik, D. R., Zezas, A., Zhang, W., & NuSTAR Team 2013, American Astronomical Society Meeting Abstracts #221, 221, #244.21

  26. "NuSTAR's Preliminary Results of the Pulsar Wind Nebula G21.5-0.9," Nynka, M., Madsen, K., An, H., Boggs, S. E., Christensen, F., Craig, W. W., Freyer, C., Grefenstette, B., Hailey, C. J., Harrison, F., Humensky, B., Jakobsen, S., Kaspi, V., Kitaguchi, T., Lopez, L. A., Miyasaka, H., Mori, K., Pivovaroff, M., Reynolds, S. P., Stern, D., Westergaard, N. J., Wik, D. R., Zhang, W., Zoglauer, A., & NuSTAR Team 2013, American Astronomical Society Meeting Abstracts #221, 221, #244.10

  27. "The NuSTAR Program for Pulsar-wind Nebulae," Madsen, K., An, H., Boggs, S. E., Craig, W. W., Freyer, C., Grefenstette, B., Hailey, C. J., Humensky, B., Jakobsen, S., Kaspi, V., Lopez, L. A., Miyasaka, H., Mori, K., Nynka, M., Pivovaroff, M., Reynolds, S. P., Kitaguchi, T., Westergaard, N. J., Wik, D. R., Zoglauer, A., Christensen, F., Harrison, F., Stern, D., Zhang, W., & NuSTAR Team 2013, American Astronomical Society Meeting Abstracts #221, 221, #244.09

  28. "The NuSTAR Program for Supernova Remnants," Grefenstette, B., An, H., Boggs, S. E., Christensen, F., Craig, W. W., Freyer, C., Hailey, C. J., Harrison, F., Humensky, B., Jakobsen, S., Kaspi, V., Kitaguchi, T., Lopez, L. A., Madsen, K., Miyasaka, H., Mori, K., Nynka, M., Pivovaroff, M., Reynolds, S. P., Stern, D., Westergaard, N. J., Wik, D. R., Zhang, W., Zoglauer, A., & NuSTAR Team 2013, American Astronomical Society Meeting Abstracts #221, 221, #244.08

  29. "The Merger Dynamics of the Abell 2061 Cluster and the Origin of the Radio Relics and Halos," Hogge, T., Sarazin, C. L., & Wik, D. R. 2013, American Astronomical Society Meeting Abstracts #221, 221, #243.04

  30. "The Merger Shock in Abell 3667 and the Origin of the Radio Relic," Sarazin, C., Finoguenov, A., Wik, D. R., Clarke, T. E., Johnston-Hollit, M., Nakazawa, K., & Ricker, P. 2012, Half a Century of X-ray Astronomy, Proceedings of the conference held 17-21 September, 2012 in Mykonos Island, Greece. Online at http://www.astro.noa.gr/xcosmo/, id.61, 61

  31. "Optical Spectroscopy of Serendipitous Chandra Sources from the ChaMP and a Thousand Broad-band SEDs," Trichas, M., Green, P. J., Aldcroft, T. L., Constantin, A., Silverman, J. D., Ruiz, A., Haggard, D., Barkhouse, W. A., Kim, D., Wik, D. R., Wolfgang, A., Covey, K. R., Romero-Colmenero, E., Smith, M. G., Wilkes, B. J., Schechter, P. L., & Marschall, H. L. 2011, AAS/High Energy Astrophysics Division, 12, #22.03

  32. "Particle Acceleration in Cosmic Shocks: XMM-Newton and Suzaku Observations of the Merger Shock and NW Radio Relic in Abell 3667," Sarazin, C. L., Finoguenov, A., Nakazawa, K., Wik, D. R., & Clarke, T. E. 2010, Bulletin of the American Astronomical Society, 42, 714

  33. "Non-Equilibrium Processes in Relaxed Galaxy Cluster Outskirts," Wong, K.-W., Sarazin, C. L., Wik, D. R., Ji, L., Wang, Q. D., & Tripp, T. M. 2010, Bulletin of the American Astronomical Society, 42, 713

  34. "Non-Thermal and Thermal Hard X-ray Emission from Clusters of Galaxies," Sarazin, C. L., Wik, D. R., Nakazawa, K., Finoguenov, A., Clarke, T. E., Fukazawa, Y., Inoue, S., Kawaharada, M., & Takizawa, M. 2010, The Energetic Cosmos: from Suzaku to ASTRO-H, 78