Zobrazeno 1 - 10
of 406
pro vyhledávání: '"Christensen Finn E."'
Autor:
Christensen, Finn E., Ramsey, Brian D.
Grazing-incidence X-ray optics have revolutionized X-ray astrophysics. The ability to concentrate flux to a tiny detection region provides a dramatic reduction in background and a consequent very large improvement in sensitivity. The X-ray optics als
Externí odkaz:
http://arxiv.org/abs/2207.00512
Autor:
Bachetti Matteo, Barret Didier, Boggs Steven E., Christensen Finn E., Craig William W., Fabian Andrew C., Forster Karl, Fürst Felix, Grefenstette Brian W., Hailey Charles J., Harrison Fiona A., Hornschemeier Ann E., Madsen Kristin K., Miller Jon M., Parker Michael, Ptak Andrew, Rana Vikram R., Risaliti Guido, Stern Daniel, Walton Dominic J., Webb Natalie A., Zhang William W.
Publikováno v:
EPJ Web of Conferences, Vol 64, p 06010 (2014)
We present the results of the first large program of broadband ULX observations with NuSTAR, XMM–Newton and Suzaku, yielding high-quality spectra and timing measurements from 0.3–30 keV in 6 ULXs, providing powerful information for understanding
Externí odkaz:
https://doaj.org/article/dac43513f8274376a6ed3dfc8b4b8a40
Autor:
Bachetti Matteo, Miyasaka Hiromasa, Harrison Fiona, Fürst Felix, Barret Didier, Bellm Eric C., Boggs Steven E., Chakrabarty Deepto, Chenevez Jerome, Christensen Finn E., Craig William W., Grefenstette Brian W., Hailey Charles J., Madsen Kristin K., Natalucci Lorenzo, Pottschmidt Katja, Stern Daniel, Tomsick John A., Walton Dominic J., Wilms Jörn, Zhang William
Publikováno v:
EPJ Web of Conferences, Vol 64, p 06011 (2014)
The NuSTAR hard X-ray telescope observed the transient Be/X-ray binary GS 0834–430 during its 2012 outburst. The source is detected between 3 – 79 keV with high statistical significance, and we were able to perform very accurate spectral and timi
Externí odkaz:
https://doaj.org/article/d2ea4d81bf52467fac1eb0a61d23cccf
Autor:
Marsh, Andrew J., Smith, David M., Glesener, Lindsay, Hannah, Iain G., Grefenstette, Brian W., Caspi, Amir, Krucker, Säm, Hudson, Hugh S., Madsen, Kristin K., White, Stephen M., Kuhar, Matej, Wright, Paul J., Boggs, Steven E., Christensen, Finn E., Craig, William W., Hailey, Charles J., Harrison, Fiona A., Stern, Daniel, Zhang, William W.
Publikováno v:
The Astrophysical Journal, Vol. 849, Issue 2, 131 (8pp); 2017 November 10
We present the first results of a search for transient hard X-ray (HXR) emission in the quiet solar corona with the \textit{Nuclear Spectroscopic Telescope Array} (\textit{NuSTAR}) satellite. While \textit{NuSTAR} was designed as an astrophysics miss
Externí odkaz:
http://arxiv.org/abs/1711.05385
Autor:
Madsen, Kristin K., Christensen, Finn E., Craig, William W., Forster, Karl W., Grefenstette, Brian W., Harrison, Fiona A., Miyasaka, Hiromasa, Rana, Vikram
Publikováno v:
J. Astron. Telesc. Instrum. Syst. 3(4), 044003 (2017)
The Nuclear Spectroscopic Telescope Array (NuSTAR), launched in June 2012, flies two conical approximation Wolter-I mirrors at the end of a 10.15m mast. The optics are coated with multilayers of Pt/C and W/Si that operate from 3--80 keV. Since the op
Externí odkaz:
http://arxiv.org/abs/1711.02719
Autor:
Mori, Kaya, Gotthelf, E. V., Hailey, Charles J., Hord, Ben J., Wilhelmi, Emma de Ona, Rahoui, Farid, Tomsick, John A., Zhang, Shuo, Hong, Jaesub, Garvin, Amani M., Boggs, Steven E., Christensen, Finn E., Craig, William W., Harrison, Fiona A., Stern, Daniel, Zhang, William W.
We present a hard X-ray observation of the TeV gamma-ray binary candidate HESS J1832-093 coincident with supernova remnant (SNR) G22.7-0.2 using the Nuclear Spectroscopic Telescope Array (NuSTAR). Non-thermal X-ray emission from XMMU J183245-0921539,
Externí odkaz:
http://arxiv.org/abs/1710.02118
Autor:
Ballhausen, Ralf, Pottschmidt, Katja, Fürst, Felix, Wilms, Jörn, Tomsick, John A., Schwarm, Fritz-Walter, Stern, Daniel, Kretschmar, Peter, Caballero, Isabel, Harrison, Fiona A., Boggs, Steven E., Christensen, Finn E., Craig, William W., Hailey, Charles J., Zhang, William W.
Publikováno v:
A&A 608, A105 (2017)
We report on two NuSTAR observations of the HMXB A 0535+26 taken toward the end of its normal 2015 outburst at very low $3-50$ keV luminosities of ${\sim}1.4\times10^{36}$ erg/s and ${\sim}5\times10^{35}$ erg/s which are complemented by 9 Swift obser
Externí odkaz:
http://arxiv.org/abs/1707.05648
Autor:
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 Galactic plane survey campaign. We report on the data obtained between July 2012 and April 201
Externí odkaz:
http://arxiv.org/abs/1705.08002
Autor:
Fornasini, Francesca M., Tomsick, John A., Hong, JaeSub, Gotthelf, Eric V., Bauer, Franz, Rahoui, Farid, Stern, Daniel, Bodaghee, Arash, Chiu, Jeng-Lun, Clavel, Maïca, Corral-Santana, Jesús M., Hailey, Charles J., Krivonos, Roman A., Mori, Kaya, Alexander, David M., Barret, Didier, Boggs, Steven E., Christensen, Finn E., Craig, William W., Forster, Karl, Giommi, Paolo, Grefenstette, Brian W., Harrison, Fiona A., Hornstrup, Allan, Kitaguchi, Takao, Koglin, J. E., Madsen, Kristin K., Mao, Peter H., Miyasaka, Hiromasa, Perri, Matteo, Pivovaroff, Michael J., Puccetti, Simonetta, Rana, Vikram, Westergaard, Niels J., Zhang, William W.
We present a catalog of hard X-ray sources in a square-degree region surveyed by NuSTAR in the direction of the Norma spiral arm. This survey has a total exposure time of 1.7 Ms, and typical and maximum exposure depths of 50 ks and 1 Ms, respectively
Externí odkaz:
http://arxiv.org/abs/1703.00021
Autor:
Kuhar, Matej, Krucker, Säm, Hannah, Iain G., Glesener, Lindsay, Saint-Hilaire, Pascal, Grefenstette, Brian W., Hudson, Hugh S., White, Stephen M., Smith, David M., Marsh, Andrew J., Wright, Paul J., Boggs, Steven E., Christensen, Finn E., Craig, William W., Hailey, Charles J., Harrison, Fiona A., Stern, Daniel, Zhang, William W.
Publikováno v:
The Astrophysical Journal, 835:6, 2017 January 20
We present observations of the occulted active region AR12222 during the third {\em NuSTAR} solar campaign on 2014 December 11, with concurrent {\em SDO/}AIA and {\em FOXSI-2} sounding rocket observations. The active region produced a medium size sol
Externí odkaz:
http://arxiv.org/abs/1701.07759