Zobrazeno 1 - 10
of 128
pro vyhledávání: '"Kurfess, J."'
Autor:
Krawczynski, H., Garson III, A., Li, Q., Beilicke, M., Dowkontt, P., Wulf, E., Kurfess, J., Novikova, E., De Geronimo, G., Baring, M. G., Harding, A. K., Grindlay, J., Hong, J. S.
Publikováno v:
IEEE Trans.Nucl.Sci.56:3607-3613,2009
We report on the design and estimated performance of a balloon-borne hard X-ray polarimeter called HX-POL. The experiment uses a combination of Si and Cadmium Zinc Telluride detectors to measure the polarization of 50 keV-400 keV X-rays from cosmic s
Externí odkaz:
http://arxiv.org/abs/0812.1809
Publikováno v:
New Astron.Rev. 46 (2002) 553-558
Radioactive nuclei, especially those created in SN explosion, have long been suggested to be important contributors of galactic positrons. In this paper we describe the findings of three independent OSSE/SMM/TGRS studies of positron annihilation radi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0110442
Publikováno v:
New Astron.Rev. 46 (2002) 617-623
The Advanced Compton Telescope (ACT) has been suggested to be the optimal next-generation instrument to study nuclear gamma-ray lines. In this work, we investigate the potential of three hypothetical designs of the ACT to perform SN science. We provi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0110346
Positron annihilation radiation from the Galaxy has been observed by the OSSE, SMM and TGRS instruments. Improved spectral modeling of OSSE observations has allowed studies of the distribution of both positron annihilation radiation components, the n
Externí odkaz:
http://arxiv.org/abs/astro-ph/0106157
By combining OSSE, SMM and TGRS observations of the galactic center region, Purcell et al. (1997) and Cheng et al. (1997) produced the first maps of galactic positron annihilation. That data-set has been augmented with additional data, both recent an
Externí odkaz:
http://arxiv.org/abs/astro-ph/9911184
We report the results of extracting the hard X-ray continuum spectrum of Cas A SNR from RXTE/PCA Target of Opportunity (TOO) observations and CGRO/OSSE observations. The data can rule out the single thermal bremsstrahlung model for Cas A continuum be
Externí odkaz:
http://arxiv.org/abs/astro-ph/9707086
Autor:
Skibo, J. G., Johnson, W. N., Kurfess, J. D., Kinzer, R. L., Jung, G., Grove, J. E., Purcell, W. R., Ulmer, M. P., Gehrels, N., Tueller, J.
We present the results of OSSE observations of the soft gamma ray continuum emission from the Galactic plane at longitude 95 degrees. Emission is detected between 50 and 600 keV where the spectrum is fit well by a power law with photon index -2.6+-0.
Externí odkaz:
http://arxiv.org/abs/astro-ph/9704207
Autor:
Dixon, D. D., Tumer, T. O., Zych, A. D., Cheng, L. X., Johnson, W. N., Kurfess, J. D., Pina, R. K., Puetter, R. C., Purcell, W. R., Wheaton, Wm. A.
We present progress toward using scanned OSSE observations for mapping and sky survey work. To this end, we have developed a technique for detecting pointlike sources of unknown number and location, given that they appear in a background which is rel
Externí odkaz:
http://arxiv.org/abs/astro-ph/9703042
Autor:
Mattox, J. R., Wagner, S. J., Malkan, M., McGlynn, T. A., Schachter, J. F., Grove, J. E., Johnson, W. N., Kurfess, J. D.
We report the observation by the Compton Gamma Ray Observatory of a spectacular flare of radio source PKS 1622-297. A peak flux of 17E-6 cm^-2 s^-1 (E > 100 MeV) was observed. The corresponding isotropic luminosity is 2.9E49 erg/s. We find that PKS 1
Externí odkaz:
http://arxiv.org/abs/astro-ph/9610007
Publikováno v:
Science, 1989 Apr . 244(4903), 444-448.
Externí odkaz:
https://www.jstor.org/stable/1703088
