Zobrazeno 1 - 10
of 169
pro vyhledávání: '"D D Dixon"'
Autor:
Eric D. Kolaczyk, D. D. Dixon
Publikováno v:
The Astrophysical Journal. 534:490-505
We present a method for the nonparametric (model-free) estimation of an intensity map underlying two-dimensional count data with Poisson noise characteristics. Specifically, we extend the so-called TIPSH (translation invariant Poisson smoothing using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec0f0e181f76a8476df00a3d59eac8e5
https://doi.org/10.1086/308718
https://doi.org/10.1086/308718
Autor:
Dieter H. Hartmann, Eric D. Kolaczyk, Roland Diehl, D. D. Dixon, H. Mayer-Hasselwander, Gottfried Kanbach, Andrew W. Strong, J. Samimi
Publikováno v:
New Astronomy. 3:539-561
We present quantitative statistical evidence for a $\gamma$-ray emission halo surrounding the Galaxy. Maps of the emission are derived. EGRET data were analyzed in a wavelet-based non-parametric hypothesis testing framework, using a model of expected
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a9b2d1a3549fe4ed2b2085abd640fbb2
https://doi.org/10.1016/s1384-1076(98)00024-4
https://doi.org/10.1016/s1384-1076(98)00024-4
Autor:
James D. Kurfess, David M. Smith, Michael A. Saunders, D. D. Dixon, W. R. Purcell, R. L. Kinzer, J. G. Skibo, Jack Tueller, Marvin Leventhal, L. X. Cheng
Publikováno v:
The Astrophysical Journal. 491:725-748
The Oriented Scintillation Spectrometer Experiment (OSSE) observations of the Galactic plane and Galactic center region have been combined with scanning observations by the Transient Gamma-Ray Spectrometer (TGRS) and Solar Maximum Mission (SMM) instr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb815468d7490b926d9273f3d6325699
https://doi.org/10.1086/304994
https://doi.org/10.1086/304994
Autor:
A. D. Zych, W. N. Johnson, R. K. Piña, W. R. Purcell, D. D. Dixon, L. X. Cheng, T. Tumer, William A. Wheaton, Richard C. Puetter, James D. Kurfess
Publikováno v:
The Astrophysical Journal. 484:891-899
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ab5a8538b7d1c1138fe1190e8e71a96
https://doi.org/10.1086/304347
https://doi.org/10.1086/304347
Autor:
Marvin Leventhal, Alanna Connors, J. Tueller, W. R. Purcell, D. D. Dixon, R. L. Kinzer, J. G. Skibo, D. M. Smith, L. X. Cheng
Publikováno v:
The Astrophysical Journal. 481:L43-L46
We have applied the maximum entropy method to a large data set based on Compton Gamma Ray Observatory (CGRO)/OSSE, Solar Maximum Mission, Transient Gamma-Ray Spectrometer, Gamma-Ray Imaging Spectrometer, HEXAGONE, and FIGARO observational results of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d7deb688da563733e79444bfd1487c4
https://doi.org/10.1086/310638
https://doi.org/10.1086/310638
Publikováno v:
Physical Review D. 55:6344-6356
An effective field approximation, similar to the atomic Thomas-Fermi approach, is proposed for studying non-Abelian gauge theories which includes finite-volume effects. As applications of the formalism the equation of state for an SU(2) gauge theory
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2771fcf82812f9fae922858479cea69d
https://doi.org/10.1103/physrevd.55.6344
https://doi.org/10.1103/physrevd.55.6344
Autor:
D. S. Hanna, R. A. Ong, Dipen Bhattacharya, J. Québert, S. M. Oser, Corbin Covault, D. T. Gregorich, D. D. Dixon, O. T. Tumer, Allen D. Zych, D. A. Smith
Publikováno v:
Astroparticle Physics. 5:353-365
The gamma-ray energy region between 20 and 250 GeV is largely unexplored. Ground-based atmospheric Cherenkov detectors offer a possible way to explore this region, but large Cherenkov photon collection areas are needed to achieve low energy threshold
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33a2071ab88826eb74ef3bfecfc1fea5
https://doi.org/10.1016/0927-6505(96)00036-9
https://doi.org/10.1016/0927-6505(96)00036-9
Autor:
D D Dixon
Publikováno v:
Journal of Physics A: Mathematical and General. 28:5539-5551
We describe a form of piecewise deterministic dynamics, where solutions evolve deterministically throughout most of phase space, but, in the presence of noise, make nondeterministic jumps to other solutions when the trajectory passes near a singulari
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca38e4639eab0438e1993bd73a242206
https://doi.org/10.1088/0305-4470/28/19/010
https://doi.org/10.1088/0305-4470/28/19/010
Autor:
D. D. Dixon, C.-J. Liu, G. L. Case, Dipen Bhattacharya, J. Samimi, Terrence J. O'Neill, S.C. Blair, Aysun Akyüz, R. S. White, Allen D. Zych, O. T. Tumer
Publikováno v:
IEEE Transactions on Nuclear Science. 42:907-916
The Tracking and Imaging Gamma-Ray Experiment4 (TIGRE) uses multilayers of silicon strip detectors both as a gamma-ray converter and to track Compton recoil electrons and positron-electron pairs. The direction and energy of the Compton scattered gamm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d7aea114e59192e98773b746e8933f6
https://doi.org/10.1109/23.467770
https://doi.org/10.1109/23.467770
Autor:
O. T. Tumer, R. S. White, Dipen Bhattacharya, Terrence J. O'Neill, D. D. Dixon, Aysun Akyüz, Allen D. Zych
Publikováno v:
Experimental Astronomy. 6:275-284
The proposed Tracking and Imaging Gamma-Ray Experiment (TIGRE), operating in the 0.3–100 MeV energy interval, will be an efficient polarimeter with a modulation factor of ∼50% at 0.5 MeV. The polarization detection parameters of TIGRE were estima
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e516678ee1e8a9f9ba45c7d2dfa454b
https://doi.org/10.1007/bf00418325
https://doi.org/10.1007/bf00418325