Zobrazeno 1 - 10
of 140
pro vyhledávání: '"Elsner, Ronald F."'
Autor:
Snios, Bradford, Dunn, William R., Lisse, Carey M., Branduardi-Raymont, Graziella, Dennerl, Konrad, Bhardwaj, Anil, Gladstone, G. Randall, Nulsen, Susan, Bodewits, Dennis, Jackman, Caitriona M., Alvarado-Gómez, Julián D., Bunce, Emma J., Combi, Michael R., Cravens, Thomas E., Cumbee, Renata S., Drake, Jeremy J., Elsner, Ronald F., Grodent, Denis, Hong, Jae Sub, Kharchenko, Vasili, Kraft, Ralph P., Marler, Joan P., Moschou, Sofia P., Mullen, Patrick D., Wolk, Scott J., Yao, Zhonghua
X-ray observatories contribute fundamental advances in Solar System studies by probing Sun-object interactions, developing planet and satellite surface composition maps, probing global magnetospheric dynamics, and tracking astrochemical reactions. De
Externí odkaz:
http://arxiv.org/abs/1903.02574
Autor:
Slowikowska, Agnieszka, Stappers, Benjamin W., Harding, Alice K., O'Dell, Stephen L., Elsner, Ronald F., van der Horst, Alexander J., Weisskopf, Martin C.
Using the Westerbork Synthesis Radio Telescope (WSRT), we obtained high-time-resolution measurements of the full (linear and circular) polarization of the Crab pulsar. Taken at a resolution of 1/8192 of the 34-ms pulse period (i.e., $4.1~\mu{\rm s}$)
Externí odkaz:
http://arxiv.org/abs/1402.6719
The prospects for accomplishing x-ray polarization measurements of astronomical sources have grown in recent years, after a hiatus of more than 37 years. Unfortunately, accompanying this long hiatus has been some confusion over the statistical uncert
Externí odkaz:
http://arxiv.org/abs/1208.0610
Autor:
Weisskopf, Martin C., Elsner, Ronald F., Kolodziejczak, Jeffery J., O'Dell, Stephen L., Tennant, Allyn F.
Chandra images of the Crab Nebula resolve the detailed structure of its "inner ring", possibly a termination shock where pulsar-accelerated relativistic particles begin to emit X radiation. Analysis of these images finds that the center of the ellips
Externí odkaz:
http://arxiv.org/abs/1109.2868
Autor:
Weisskopf, Martin C., Romani, Roger W., Razzano, Massimiliano, Belfiore, Andrea, Parkinson, Pablo Saz, Ray, Paul S., Kerr, Matthew, Harding, Alice, Swartz, Douglas A., Carraminana, Alberto, Ziegler, Marcus, Becker, Werner, De Luca, Andrea, Dormody, Michael, Thompson, David J., Kanbach, Gottfried, Elsner, Ronald F., O'Dell, Stephen L., Tennant, Allyn F.
We report the probable identification of the X-ray counterpart to the gamma-ray pulsar PSR J2021+4026 using imaging with the Chandra X-ray Observatory ACIS and timing analysis with the Fermi satellite. Given the statistical and systematic errors, the
Externí odkaz:
http://arxiv.org/abs/1108.3987
Autor:
Weisskopf, Martin C., Tennant, Allyn F., Yakovlev, Dmitry G., Harding, Alice, Zavlin, Vyacheslav E., O'Dell, Stephen L., Elsner, Ronald F., Becker, Werner
We present a new study of the X-ray spectral properties of the Crab Pulsar. The superb angular resolution of the Chandra X-ray Observatory enables distinguishing the pulsar from the surrounding nebulosity. Analysis of the spectrum as a function of pu
Externí odkaz:
http://arxiv.org/abs/1106.3270
Autor:
Bhardwaj, Anil, Elsner, Ronald F., Gladstone, G. Randall, Cravens, Thomas E., Lisse, Carey M., Dennerl, Konrad, Branduardi-Raymont, Graziella, Wargelin, Bradford J., Waite, J. Hunter, Robertson, Ina, Ostgaard, Nikolai, Beiersdorfer, Peter, Snowden, Steven L., Kharchenko, Vasili
Publikováno v:
Planetary and Space Science, Volume 55, Issue 9, p. 1135-1189 (2007)
During the last few years our knowledge about the X-ray emission from bodies within the solar system has significantly improved. Several new solar system objects are now known to shine in X-rays at energies below 2 keV. Apart from the Sun, the known
Externí odkaz:
http://arxiv.org/abs/1012.1088
We are working on the development of a method for optimizing wide-field X-ray telescope mirror prescriptions, including polynomial coefficients, mirror shell relative displacements, and (assuming 4 focal plane detectors) detector placement along the
Externí odkaz:
http://arxiv.org/abs/1006.5065
The prospects for accomplishing X-ray polarization measurements appear to have grown in recent years after a more than 35-year hiatus. Unfortunately, this long hiatus has brought with it some confusion over the statistical uncertainties associated wi
Externí odkaz:
http://arxiv.org/abs/1006.3711
Autor:
Bhardwaj, Anil, Gladstone, G. Randall, Elsner, Ronald F., Ostgaard, Nikolai, Waite, Jr., J. Hunter, Cravens, Thomas E., Chang, Shen-Wu, Majeed, Tariq, Metzger, Albert E.
Northern auroral regions of Earth were imaged with energetic photons in the 0.1-10 keV range using the High-Resolution Camera (HRC-I) aboard the Chandra X-ray Observatory at 10 epochs (each ~20 min duration) between mid-December 2003 and mid-April 20
Externí odkaz:
http://arxiv.org/abs/astro-ph/0612261