Search Results - "Kristin Madsen"

Measurement of the Absolute Crab Flux with NuSTAR by Madsen, Kristin K., Forster, Karl, Grefenstette, Brian W., Harrison, Fiona A., Stern, Daniel

“…We present results from a Nuclear Spectroscopic Telescope Array (NuSTAR) observation of the Crab made at a large off-axis angle of 1 5. At these angles, X-rays…”
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StrayCats: A Catalog of NuSTAR Stray Light Observations by Grefenstette, Brian W., Ludlam, Renee M., Thompson, Ellen T., Hare, Jeremy, Jaodand, Amruta D., Garcia, Javier A, Krivonos, Roman A., Madsen, Kristin C, Mastroserio, Guglielmo, Slaughter, Catherine M., Tomsick, John A., Wik, Daniel, Zoglauer, Andreas

“…We present StrayCats, a catalog of NuSTAR stray light observations of X-ray sources. Stray light observations arise for sources 1°–4°away from the telescope…”
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Timing Calibration of the NuSTAR X-Ray Telescope by Bachetti, Matteo, Markwardt, Craig B., Grefenstette, Brian W., Gotthelf, Eric V., Kuiper, Lucien, Barret, Didier, Cook, W. Rick, Davis, Andrew, Fürst, Felix, Forster, Karl, Harrison, Fiona A., Madsen, Kristin K., Miyasaka, Hiromasa, Roberts, Bryce, Tomsick, John A., Walton, Dominic J.

“…The Nuclear Spectroscopic Telescope Array (NuSTAR) mission is the first focusing X-ray telescope in the hard X-ray (3-79 keV) band. Among the phenomena that…”
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Evidence of Particle Acceleration in the Superbubble 30 Doradus C with NuSTAR by Lopez, Laura A., Grefenstette, Brian W., Auchettl, Katie, Madsen, Kristin K., Castro, Daniel

“…We present evidence of diffuse, non-thermal X-ray emission from the superbubble 30 Doradus C (30 Dor C) using hard X-ray images and spectra from NuSTAR…”
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Sagittarius A High-energy X-Ray Flare Properties during NuStar Monitoring of the Galactic Center from 2012 to 2015 by Zhang, Shuo, Baganoff, Frederick K., Ponti, Gabriele, Neilsen, Joseph, Tomsick, John A., Dexter, Jason, Clavel, Maïca, Markoff, Sera, Hailey, Charles J., Mori, Kaya, Barrière, Nicolas M., Nowak, Michael A., Boggs, Steven E., Christensen, Finn E., Craig, William W., Grefenstette, Brian W., Harrison, Fiona A., Madsen, Kristin K., Stern, Daniel, Zhang, William W.

“…Understanding the origin of the flaring activity from the Galactic center supermassive black hole Sagittarius A* is a major scientific goal of the NuSTAR…”
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Steam Reforming of Tar Impurities from Biomass Gasification with Ni-Co/Mg(Al)O Catalysts—Operating Parameter Effects by Lysne, Ask, Saxrud, Ida, Madsen, Kristin Ø., Blekkan, Edd A.

“…The elimination of tar impurities from biomass gasification by catalytic steam reforming can provide clean syngas for downstream biofuel synthesis…”
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Orbital Decay in M82 X-2 by Bachetti, Matteo, Heida, Marianne, Maccarone, Thomas, Huppenkothen, Daniela, Israel, Gian Luca, Barret, Didier, Brightman, Murray, Brumback, McKinley, Earnshaw, Hannah P., Forster, Karl, Fürst, Felix, Grefenstette, Brian W., Harrison, Fiona A., Jaodand, Amruta D., Madsen, Kristin K., Middleton, Matthew, Pike, Sean N., Pilia, Maura, Poutanen, Juri, Stern, Daniel, Tomsick, John A., Walton, Dominic J., Webb, Natalie, Wilms, Jörn

“…Abstract M82 X-2 is the first pulsating ultraluminous X-ray source discovered. The luminosity of these extreme pulsars, if isotropic, implies an extreme mass…”
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KILOPARSEC-SCALE SPATIAL OFFSETS IN DOUBLE-PEAKED NARROW-LINE ACTIVE GALACTIC NUCLEI. I. MARKERS FOR SELECTION OF COMPELLING DUAL ACTIVE GALACTIC NUCLEUS CANDIDATES by COMERFORD, Julia M, GERKE, Brian F, STERN, Daniel, COOPER, Michael C, WEINER, Benjamin J, NEWMAN, Jeffrey A, MADSEN, Kristin, SCOTT BARROWS, R

“…Merger-remnant galaxies with kiloparsec (kpc) scale separation dual active galactic nuclei (AGNs) should be widespread as a consequence of galaxy mergers and…”
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Photospheric Radius Expansion and a Double-peaked Type-I X-Ray Burst from GRS 1741.9–2853 by Pike, Sean N., Harrison, Fiona A., Tomsick, John A., Bachetti, Matteo, Buisson, Douglas J. K., García, Javier A., Jiang, Jiachen, Ludlam, R. M., Madsen, Kristin K.

“…We present an analysis of two type-I X-ray bursts observed by NuSTAR originating from the very faint transient neutron star (NS) low-mass X-ray binary GRS…”
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Measuring the Cosmic X-Ray Background in 3–20 KeV with Stray Light from NuSTAR by Rossland, Steven, Wik, Daniel R., Grefenstette, Brian, Cappelluti, Nico, Civano, Francesca, Gastaldello, Fabio, Gilli, Roberto, Harrison, Fiona, Hornschemeier, Ann, Hickox, Ryan, Krivonos, Roman, Madsen, Kristin, Molendi, Silvano, Ptak, Andrew, Stern, Daniel, Zoglauer, Andreas

“…Abstract By characterizing the contribution of stray light to large data sets from the CXB Measurement X-ray observatory collected over 2012–2017, we report a…”
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THE FIRST FOCUSED HARD X-RAY IMAGES OF THE SUN WITH NuSTAR by Grefenstette, Brian W., Glesener, Lindsay, Krucker, Säm, Hudson, Hugh, Hannah, Iain G., Smith, David M., Vogel, Julia K., White, Stephen M., Madsen, Kristin K., Marsh, Andrew J., Caspi, Amir, Chen, Bin, Shih, Albert, Kuhar, Matej, Boggs, Steven E., Christensen, Finn E., Craig, William W., Forster, Karl, Hailey, Charles J., Harrison, Fiona A., Miyasaka, Hiromasa, Stern, Daniel, Zhang, William W.

“…ABSTRACT We present results from the the first campaign of dedicated solar observations undertaken by the Nuclear Spectroscopic Telescope ARray (NuSTAR) hard…”
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Extending the Baseline for SMC X-1's Spin and Orbital Behavior with NuSTAR Stray Light by 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

“…Abstract StrayCats, the catalog of NuSTAR stray light observations, contains data from bright X-ray sources that fall within crowded source regions. These…”
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The Low-temperature Corona in ESO 511−G030 Revealed by NuSTAR and XMM-Newton by Zhang, Zuobin, Jiang, Jiachen, Liu, Honghui, Bambi, Cosimo, Reynolds, Christopher S., Fabian, Andrew C., Dauser, Thomas, Madsen, Kristin, Young, Andrew, Gallo, Luigi, Yu, Zhibo, Tomsick, John

“…Abstract We present the results from a coordinated XMM-Newton + NuSTAR observation of the Seyfert 1 galaxy ESO 511−G030. With this joint monitoring program, we…”
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Observing the Transient Pulsations of SMC X-1 with NuSTAR by Pike, Sean N., Harrison, Fiona A., Bachetti, Matteo, Brumback, McKinley C., Fürst, Felix S., Madsen, Kristin K., Pottschmidt, Katja, Tomsick, John A., Wilms, Jörn

“…We report on Nuclear Spectroscopic Telescope Array observations of transient pulsations in the neutron star X-ray binary SMC X-1. The transition from…”
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LOCATING THE MOST ENERGETIC ELECTRONS IN CASSIOPEIA A by Grefenstette, Brian W., Reynolds, Stephen P., Harrison, Fiona A., Humensky, T. Brian, Boggs, Steven E., Fryer, Chris L., DeLaney, Tracey, Madsen, Kristin K., Miyasaka, Hiromasa, Wik, Daniel R., Zoglauer, Andreas, Forster, Karl, Kitaguchi, Takao, Lopez, Laura, Nynka, Melania, Christensen, Finn E., Craig, William W., Hailey, Charles J., Stern, Daniel, Zhang, William W.

“…ABSTRACT We present deep (>2.4 Ms) observations of the Cassiopeia A supernova remnant with NuSTAR, which operates in the 3-79 keV bandpass and is the first…”
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A BROADBAND X-RAY SPECTRAL STUDY OF THE INTERMEDIATE-MASS BLACK HOLE CANDIDATE M82 X-1 WITH NuSTAR, CHANDRA, AND SWIFT by Brightman, Murray, Harrison, Fiona A., Barret, Didier, Davis, Shane W., Fürst, Felix, Madsen, Kristin K., Middleton, Matthew, Miller, Jon M., Stern, Daniel, Tao, Lian, Walton, Dominic J.

“…ABSTRACT M82 X-1 is one of the brightest ultraluminous X-ray sources (ULXs) known, which, assuming Eddington-limited accretion and other considerations, makes…”
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NuSTAR OBSERVATIONS OF THE POWERFUL RADIO-GALAXY CYGNUS A by Reynolds, Christopher S., Lohfink, Anne M., Ogle, Patrick M., Harrison, Fiona A., Kristin K. Madsen, Fabian, Andrew C., Wik, Daniel R., Madejski, Grzegorz, Ballantyne, David R., Boggs, Steven E., Christensen, Finn E., Craig, William W., Fuerst, Felix, Hailey, Charles J., Lanz, Lauranne, Miller, Jon M., Saez, Cristian, Stern, Daniel, Walton, Dominic J., Zhang, William

“…ABSTRACT We present NuSTAR observations of the powerful radio galaxy Cygnus A, focusing on the central absorbed active galactic nucleus (AGN). Cygnus A is…”
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Spectral and Timing Properties of IGR J17091-3624 in the Rising Hard State During Its 2016 Outburst by Xu, Yanjun, García, Javier A., Fürst, Felix, Harrison, Fiona A., Walton, Dominic J., Tomsick, John A., Bachetti, Matteo, King, Ashley L., Madsen, Kristin K., Miller, Jon M., Grinberg, Victoria

“…We present a spectral and timing study of the NuSTAR and Swift observations of the black hole candidate IGR J17091-3624 in the hard state during its outburst…”
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NUSTAR OBSERVATIONS OF THE YOUNG, ENERGETIC RADIO PULSAR PSR B1509-58 by Chen, Ge, An, Hongjun, Kaspi, Victoria M., Harrison, Fiona A., Madsen, Kristin K., Stern, Daniel

“…ABSTRACT We report on Nuclear Spectroscopic Telescope Array (NuSTAR) hard X-ray observations of the young rotation-powered radio pulsar PSR B1509−59 in the…”
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NuSTAR detection of a cyclotron line in the supergiant fast X-ray transient IGR J17544−2619 by Bhalerao, Varun, Romano, Patrizia, Tomsick, John, Natalucci, Lorenzo, Smith, David M, Bellm, Eric, Boggs, Steven E, Chakrabarty, Deepto, Christensen, Finn E, Craig, William W, Fuerst, Felix, Hailey, Charles J, Harrison, Fiona A, Krivonos, Roman A, Lu, Ting-Ni, Madsen, Kristin, Stern, Daniel, Younes, George, Zhang, William

“…We present NuSTAR spectral and timing studies of the supergiant fast X-ray transient (SFXT) IGR J17544-2619. The spectrum is well described by an ~1 keV…”
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