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Name
J. Dove
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CASA, CU Boulder
City
Boulder
Country
United States

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Astrophysics (18)
 
High Energy Physics - Experiment (9)
 
Physics - Instrumentation and Detectors (6)
 
Nuclear Experiment (4)
 
Quantum Physics (4)
 
Solar and Stellar Astrophysics (1)
 
High Energy Physics - Phenomenology (1)
 
Physics - Optics (1)

Publications Authored By J. Dove

2017Apr
Authors: F. P. An, A. B. Balantekin, H. R. Band, M. Bishai, S. Blyth, D. Cao, G. F. Cao, J. Cao, Y. L. Chan, J. F. Chang, Y. Chang, H. S. Chen, Q. Y. Chen, S. M. Chen, Y. X. Chen, Y. Chen, J. Cheng, Z. K. Cheng, J. J. Cherwinka, M. C. Chu, A. Chukanov, J. P. Cummings, Y. Y. Ding, M. V. Diwan, M. Dolgareva, J. Dove, D. A. Dwyer, W. R. Edwards, R. Gill, M. Gonchar, G. H. Gong, H. Gong, M. Grassi, W. Q. Gu, L. Guo, X. H. Guo, Y. H. Guo, Z. Guo, R. W. Hackenburg, S. Hans, M. He, K. M. Heeger, Y. K. Heng, A. Higuera, Y. B. Hsiung, B. Z. Hu, T. Hu, E. C. Huang, H. X. Huang, X. T. Huang, Y. B. Huang, P. Huber, W. Huo, G. Hussain, D. E. Jaffe, K. L. Jen, X. P. Ji, X. L. Ji, J. B. Jiao, R. A. Johnson, D. Jones, L. Kang, S. H. Kettell, A. Khan, S. Kohn, M. Kramer, K. K. Kwan, M. W. Kwok, T. J. Langford, K. Lau, L. Lebanowski, J. Lee, J. H. C. Lee, R. T. Lei, R. Leitner, J. K. C. Leung, C. Li, D. J. Li, F. Li, G. S. Li, Q. J. Li, S. Li, S. C. Li, W. D. Li, X. N. Li, X. Q. Li, Y. F. Li, Z. B. Li, H. Liang, C. J. Lin, G. L. Lin, S. Lin, S. K. Lin, Y. -C. Lin, J. J. Ling, J. M. Link, L. Littenberg, B. R. Littlejohn, J. L. Liu, J. C. Liu, C. W. Loh, C. Lu, H. Q. Lu, J. S. Lu, K. B. Luk, X. Y. Ma, X. B. Ma, Y. Q. Ma, Y. Malyshkin, D. A. Martinez Caicedo, K. T. McDonald, R. D. McKeown, I. Mitchell, Y. Nakajima, J. Napolitano, D. Naumov, E. Naumova, H. Y. Ngai, J. P. Ochoa-Ricoux, A. Olshevskiy, H. -R. Pan, J. Park, S. Patton, V. Pec, J. C. Peng, L. Pinsky, C. S. J. Pun, F. Z. Qi, M. Qi, X. Qian, R. M. Qiu, N. Raper, J. Ren, R. Rosero, B. Roskovec, X. C. Ruan, H. Steiner, P. Stoler, J. L. Sun, W. Tang, D. Taychenachev, K. Treskov, K. V. Tsang, C. E. Tull, N. Viaux, B. Viren, V. Vorobel, C. H. Wang, M. Wang, N. Y. Wang, R. G. Wang, W. Wang, X. Wang, Y. F. Wang, Z. Wang, Z. Wang, Z. M. Wang, H. Y. Wei, L. J. Wen, K. Whisnant, C. G. White, L. Whitehead, T. Wise, H. L. H. Wong, S. C. F. Wong, E. Worcester, C. -H. Wu, Q. Wu, W. J. Wu, D. M. Xia, J. K. Xia, Z. Z. Xing, J. L. Xu, Y. Xu, T. Xue, C. G. Yang, H. Yang, L. Yang, M. S. Yang, M. T. Yang, Y. Z. Yang, M. Ye, Z. Ye, M. Yeh, B. L. Young, Z. Y. Yu, S. Zeng, L. Zhan, C. Zhang, C. C. Zhang, H. H. Zhang, J. W. Zhang, Q. M. Zhang, R. Zhang, X. T. Zhang, Y. M. Zhang, Y. X. Zhang, Y. M. Zhang, Z. J. Zhang, Z. Y. Zhang, Z. P. Zhang, J. Zhao, L. Zhou, H. L. Zhuang, J. H. Zou

The Daya Bay experiment has observed correlations between reactor core fuel evolution and changes in the reactor antineutrino flux and energy spectrum. Four antineutrino detectors in two experimental halls were used to identify 2.2 million inverse beta decays (IBDs) over 1230 days spanning multiple fuel cycles for each of six 2. Read More

2016Oct
Authors: Daya Bay Collaboration, F. P. An, A. B. Balantekin, H. R. Band, M. Bishai, S. Blyth, D. Cao, G. F. Cao, J. Cao, W. R. Cen, Y. L. Chan, J. F. Chang, L. C. Chang, Y. Chang, H. S. Chen, Q. Y. Chen, S. M. Chen, Y. X. Chen, Y. Chen, J. -H. Cheng, J. Cheng, Y. P. Cheng, Z. K. Cheng, J. J. Cherwinka, M. C. Chu, A. Chukanov, J. P. Cummings, J. de Arcos, Z. Y. Deng, X. F. Ding, Y. Y. Ding, M. V. Diwan, M. Dolgareva, J. Dove, D. A. Dwyer, W. R. Edwards, R. Gill, M. Gonchar, G. H. Gong, H. Gong, M. Grassi, W. Q. Gu, M. Y. Guan, L. Guo, X. H. Guo, Z. Guo, R. W. Hackenburg, R. Han, S. Hans, M. He, K. M. Heeger, Y. K. Heng, A. Higuera, Y. K. Hor, Y. B. Hsiung, B. Z. Hu, T. Hu, W. Hu, E. C. Huang, H. X. Huang, X. T. Huang, P. Huber, W. Huo, G. Hussain, D. E. Jaffe, P. Jaffke, K. L. Jen, S. Jetter, X. P. Ji, X. L. Ji, J. B. Jiao, R. A. Johnson, D. Jones, J. Joshi, L. Kang, S. H. Kettell, S. Kohn, M. Kramer, K. K. Kwan, M. W. Kwok, T. Kwok, T. J. Langford, K. Lau, L. Lebanowski, J. Lee, J. H. C. Lee, R. T. Lei, R. Leitner, J. K. C. Leung, C. Li, D. J. Li, F. Li, G. S. Li, Q. J. Li, S. Li, S. C. Li, W. D. Li, X. N. Li, Y. F. Li, Z. B. Li, H. Liang, C. J. Lin, G. L. Lin, S. Lin, S. K. Lin, Y. -C. Lin, J. J. Ling, J. M. Link, L. Littenberg, B. R. Littlejohn, D. W. Liu, J. L. Liu, J. C. Liu, C. W. Loh, C. Lu, H. Q. Lu, J. S. Lu, K. B. Luk, Z. Lv, Q. M. Ma, X. Y. Ma, X. B. Ma, Y. Q. Ma, Y. Malyshkin, D. A. Martinez Caicedo, K. T. McDonald, R. D. McKeown, I. Mitchell, M. Mooney, Y. Nakajima, J. Napolitano, D. Naumov, E. Naumova, H. Y. Ngai, Z. Ning, J. P. Ochoa-Ricoux, A. Olshevskiy, H. -R. Pan, J. Park, S. Patton, V. Pec, J. C. Peng, L. Pinsky, C. S. J. Pun, F. Z. Qi, M. Qi, X. Qian, N. Raper, J. Ren, R. Rosero, B. Roskovec, X. C. Ruan, H. Steiner, G. X. Sun, J. L. Sun, W. Tang, D. Taychenachev, K. Treskov, K. V. Tsang, C. E. Tull, N. Viaux, B. Viren, V. Vorobel, C. H. Wang, M. Wang, N. Y. Wang, R. G. Wang, W. Wang, X. Wang, Y. F. Wang, Z. Wang, Z. Wang, Z. M. Wang, H. Y. Wei, L. J. Wen, K. Whisnant, C. G. White, L. Whitehead, T. Wise, H. L. H. Wong, S. C. F. Wong, E. Worcester, C. -H. Wu, Q. Wu, W. J. Wu, D. M. Xia, J. K. Xia, Z. Z. Xing, J. Y. Xu, J. L. Xu, Y. Xu, T. Xue, C. G. Yang, H. Yang, L. Yang, M. S. Yang, M. T. Yang, M. Ye, Z. Ye, M. Yeh, B. L. Young, Z. Y. Yu, S. Zeng, L. Zhan, C. Zhang, H. H. Zhang, J. W. Zhang, Q. M. Zhang, X. T. Zhang, Y. M. Zhang, Y. X. Zhang, Y. M. Zhang, Z. J. Zhang, Z. Y. Zhang, Z. P. Zhang, J. Zhao, Q. W. Zhao, Y. B. Zhao, W. L. Zhong, L. Zhou, N. Zhou, H. L. Zhuang, J. H. Zou

A measurement of electron antineutrino oscillation by the Daya Bay Reactor Neutrino Experiment is described in detail. Six 2.9-GW$_{\rm th}$ nuclear power reactors of the Daya Bay and Ling Ao nuclear power facilities served as intense sources of $\overline{\nu}_{e}$'s. Read More

2016Aug
Authors: F. P. An, A. B. Balantekin, H. R. Band, M. Bishai, S. Blyth, D. Cao, G. F. Cao, J. Cao, W. R. Cen, Y. L. Chan, J. F. Chang, L. C. Chang, Y. Chang, H. S. Chen, Q. Y. Chen, S. M. Chen, Y. X. Chen, Y. Chen, J. -H. Cheng, J. Cheng, Y. P. Cheng, Z. K. Cheng, J. J. Cherwinka, M. C. Chu, A. Chukanov, J. P. Cummings, J. de Arcos, Z. Y. Deng, X. F. Ding, Y. Y. Ding, M. V. Diwan, M. Dolgareva, J. Dove, D. A. Dwyer, W. R. Edwards, R. Gill, M. Gonchar, G. H. Gong, H. Gong, M. Grassi, W. Q. Gu, M. Y. Guan, L. Guo, X. H. Guo, Z. Guo, R. W. Hackenburg, R. Han, S. Hans, M. He, K. M. Heeger, Y. K. Heng, A. Higuera, Y. K. Hor, Y. B. Hsiung, B. Z. Hu, T. Hu, W. Hu, E. C. Huang, H. X. Huang, X. T. Huang, P. Huber, W. Huo, G. Hussain, D. E. Jaffe, P. Jaffke, K. L. Jen, S. Jetter, X. P. Ji, X. L. Ji, J. B. Jiao, R. A. Johnson, J. Joshi, L. Kang, S. H. Kettell, S. Kohn, M. Kramer, K. K. Kwan, M. W. Kwok, T. Kwok, T. J. Langford, K. Lau, L. Lebanowski, J. Lee, J. H. C. Lee, R. T. Lei, R. Leitner, J. K. C. Leung, C. Li, D. J. Li, F. Li, G. S. Li, Q. J. Li, S. Li, S. C. Li, W. D. Li, X. N. Li, Y. F. Li, Z. B. Li, H. Liang, C. J. Lin, G. L. Lin, S. Lin, S. K. Lin, Y. -C. Lin, J. J. Ling, J. M. Link, L. Littenberg, B. R. Littlejohn, D. W. Liu, J. L. Liu, J. C. Liu, C. W. Loh, C. Lu, H. Q. Lu, J. S. Lu, K. B. Luk, Z. Lv, Q. M. Ma, X. Y. Ma, X. B. Ma, Y. Q. Ma, Y. Malyshkin, D. A. Martinez Caicedo, R. D. McKeown, I. Mitchell, M. Mooney, Y. Nakajima, J. Napolitano, D. Naumov, E. Naumova, H. Y. Ngai, Z. Ning, J. P. Ochoa-Ricoux, A. Olshevskiy, H. -R. Pan, J. Park, S. Patton, V. Pec, J. C. Peng, L. Pinsky, C. S. J. Pun, F. Z. Qi, M. Qi, X. Qian, N. Raper, J. Ren, R. Rosero, B. Roskovec, X. C. Ruan, H. Steiner, G. X. Sun, J. L. Sun, W. Tang, D. Taychenachev, K. Treskov, K. V. Tsang, C. E. Tull, N. Viaux, B. Viren, V. Vorobel, C. H. Wang, M. Wang, N. Y. Wang, R. G. Wang, W. Wang, X. Wang, Y. F. Wang, Z. Wang, Z. Wang, Z. M. Wang, H. Y. Wei, L. J. Wen, K. Whisnant, C. G. White, L. Whitehead, T. Wise, H. L. H. Wong, S. C. F. Wong, E. Worcester, C. -H. Wu, Q. Wu, W. J. Wu, D. M. Xia, J. K. Xia, Z. Z. Xing, J. Y. Xu, J. L. Xu, Y. Xu, T. Xue, C. G. Yang, H. Yang, L. Yang, M. S. Yang, M. T. Yang, M. Ye, Z. Ye, M. Yeh, B. L. Young, Z. Y. Yu, S. Zeng, L. Zhan, C. Zhang, H. H. Zhang, J. W. Zhang, Q. M. Zhang, X. T. Zhang, Y. M. Zhang, Y. X. Zhang, Y. M. Zhang, Z. J. Zhang, Z. Y. Zhang, Z. P. Zhang, J. Zhao, Q. W. Zhao, Y. B. Zhao, W. L. Zhong, L. Zhou, N. Zhou, H. L. Zhuang, J. H. Zou

The disappearance of reactor $\bar{\nu}_e$ observed by the Daya Bay experiment is examined in the framework of a model in which the neutrino is described by a wave packet with a relative intrinsic momentum dispersion $\sigma_\text{rel}$. Three pairs of nuclear reactors and eight antineutrino detectors, each with good energy resolution, distributed among three experimental halls, supply a high-statistics sample of $\bar{\nu}_e$ acquired at nine different baselines. This provides a unique platform to test the effects which arise from the wave packet treatment of neutrino oscillation. Read More

2016Jul
Authors: F. P. An, A. B. Balantekin, H. R. Band, M. Bishai, S. Blyth, D. Cao, G. F. Cao, J. Cao, W. R. Cen, Y. L. Chan, J. F. Chang, L. C. Chang, Y. Chang, H. S. Chen, Q. Y. Chen, S. M. Chen, Y. X. Chen, Y. Chen, J. -H. Cheng, J. Cheng, Y. P. Cheng, Z. K. Cheng, J. J. Cherwinka, M. C. Chu, A. Chukanov, J. P. Cummings, J. de Arcos, Z. Y. Deng, X. F. Ding, Y. Y. Ding, M. V. Diwan, M. Dolgareva, J. Dove, D. A. Dwyer, W. R. Edwards, R. Gill, M. Gonchar, G. H. Gong, H. Gong, M. Grassi, W. Q. Gu, M. Y. Guan, L. Guo, R. P. Guo, X. H. Guo, Z. Guo, R. W. Hackenburg, R. Han, S. Hans, M. He, K. M. Heeger, Y. K. Heng, A. Higuera, Y. K. Hor, Y. B. Hsiung, B. Z. Hu, T. Hu, W. Hu, E. C. Huang, H. X. Huang, X. T. Huang, P. Huber, W. Huo, G. Hussain, D. E. Jaffe, P. Jaffke, K. L. Jen, S. Jetter, X. P. Ji, X. L. Ji, J. B. Jiao, R. A. Johnson, D. Jones, J. Joshi, L. Kang, S. H. Kettell, S. Kohn, M. Kramer, K. K. Kwan, M. W. Kwok, T. Kwok, T. J. Langford, K. Lau, L. Lebanowski, J. Lee, J. H. C. Lee, R. T. Lei, R. Leitner, C. Li, D. J. Li, F. Li, G. S. Li, Q. J. Li, S. Li, S. C. Li, W. D. Li, X. N. Li, Y. F. Li, Z. B. Li, H. Liang, C. J. Lin, G. L. Lin, S. Lin, S. K. Lin, Y. -C. Lin, J. J. Ling, J. M. Link, L. Littenberg, B. R. Littlejohn, D. W. Liu, J. L. Liu, J. C. Liu, C. W. Loh, C. Lu, H. Q. Lu, J. S. Lu, K. B. Luk, Z. Lv, Q. M. Ma, X. Y. Ma, X. B. Ma, Y. Q. Ma, Y. Malyshkin, D. A. Martinez Caicedo, K. T. McDonald, R. D. McKeown, I. Mitchell, M. Mooney, Y. Nakajima, J. Napolitano, D. Naumov, E. Naumova, H. Y. Ngai, Z. Ning, J. P. Ochoa-Ricoux, A. Olshevskiy, H. -R. Pan, J. Park, S. Patton, V. Pec, J. C. Peng, L. Pinsky, C. S. J. Pun, F. Z. Qi, M. Qi, X. Qian, N. Raper, J. Ren, R. Rosero, B. Roskovec, X. C. Ruan, H. Steiner, G. X. Sun, J. L. Sun, W. Tang, D. Taychenachev, K. Treskov, K. V. Tsang, C. E. Tull, N. Viaux, B. Viren, V. Vorobel, C. H. Wang, M. Wang, N. Y. Wang, R. G. Wang, W. Wang, X. Wang, Y. F. Wang, Z. Wang, Z. Wang, Z. M. Wang, H. Y. Wei, L. J. Wen, K. Whisnant, C. G. White, L. Whitehead, T. Wise, H. L. H. Wong, S. C. F. Wong, E. Worcester, C. -H. Wu, Q. Wu, W. J. Wu, D. M. Xia, J. K. Xia, Z. Z. Xing, J. Y. Xu, J. L. Xu, Y. Xu, T. Xue, C. G. Yang, H. Yang, L. Yang, M. S. Yang, M. T. Yang, M. Ye, Z. Ye, M. Yeh, B. L. Young, Z. Y. Yu, S. Zeng, L. Zhan, C. Zhang, H. H. Zhang, J. W. Zhang, Q. M. Zhang, X. T. Zhang, Y. M. Zhang, Y. X. Zhang, Y. M. Zhang, Z. J. Zhang, Z. Y. Zhang, Z. P. Zhang, J. Zhao, Q. W. Zhao, Y. B. Zhao, W. L. Zhong, L. Zhou, N. Zhou, H. L. Zhuang, J. H. Zou

A new measurement of the reactor antineutrino flux and energy spectrum by the Daya Bay reactor neutrino experiment is reported. The antineutrinos were generated by six 2.9~GW$_{\mathrm{th}}$ nuclear reactors and detected by eight antineutrino detectors deployed in two near (560~m and 600~m flux-weighted baselines) and one far (1640~m flux-weighted baseline) underground experimental halls. Read More

2016Jul
Authors: The Daya Bay collaboration, F. P. An, A. B. Balantekin, H. R. Band, M. Bishai, S. Blyth, D. Cao, G. F. Cao, J. Cao, W. R. Cen, Y. L. Chan, J. F. Chang, L. C. Chang, Y. Chang, H. S. Chen, Q. Y. Chen, S. M. Chen, Y. X. Chen, Y. Chen, J. -H. Cheng, J. Cheng, Y. P. Cheng, Z. K. Cheng, J. J. Cherwinka, M. C. Chu, A. Chukanov, J. P. Cummings, J. de Arcos, Z. Y. Deng, X. F. Ding, Y. Y. Ding, M. V. Diwan, M. Dolgareva, J. Dove, D. A. Dwyer, W. R. Edwards, R. Gill, M. Gonchar, G. H. Gong, H. Gong, M. Grassi, W. Q. Gu, M. Y. Guan, L. Guo, R. P. Guo, X. H. Guo, Z. Guo, R. W. Hackenburg, R. Han, S. Hans, M. He, K. M. Heeger, Y. K. Heng, A. Higuera, Y. K. Hor, Y. B. Hsiung, B. Z. Hu, T. Hu, W. Hu, E. C. Huang, H. X. Huang, X. T. Huang, P. Huber, W. Huo, G. Hussain, D. E. Jaffe, P. Jaffke, K. L. Jen, S. Jetter, X. P. Ji, X. L. Ji, J. B. Jiao, R. A. Johnson, J. Joshi, L. Kang, S. H. Kettell, S. Kohn, M. Kramer, K. K. Kwan, M. W. Kwok, T. Kwok, T. J. Langford, K. Lau, L. Lebanowski, J. Lee, J. H. C. Lee, R. T. Lei, R. Leitner, J. K. C. Leung, C. Li, D. J. Li, F. Li, G. S. Li, Q. J. Li, S. Li, S. C. Li, W. D. Li, X. N. Li, Y. F. Li, Z. B. Li, H. Liang, C. J. Lin, G. L. Lin, S. Lin, S. K. Lin, Y. -C. Lin, J. J. Ling, J. M. Link, L. Littenberg, B. R. Littlejohn, D. W. Liu, J. L. Liu, J. C. Liu, C. W. Loh, C. Lu, H. Q. Lu, J. S. Lu, K. B. Luk, Z. Lv, Q. M. Ma, X. Y. Ma, X. B. Ma, Y. Q. Ma, Y. Malyshkin, D. A. Martinez Caicedo, K. T. McDonald, R. D. McKeown, I. Mitchell, M. Mooney, Y. Nakajima, J. Napolitano, D. Naumov, E. Naumova, H. Y. Ngai, Z. Ning, J. P. Ochoa-Ricoux, A. Olshevskiy, H. -R. Pan, J. Park, S. Patton, V. Pec, J. C. Peng, L. Pinsky, C. S. J. Pun, F. Z. Qi, M. Qi, X. Qian, N. Raper, J. Ren, R. Rosero, B. Roskovec, X. C. Ruan, H. Steiner, G. X. Sun, J. L. Sun, W. Tang, D. Taychenachev, K. Treskov, K. V. Tsang, C. E. Tull, N. Viaux, B. Viren, V. Vorobel, C. H. Wang, M. Wang, N. Y. Wang, R. G. Wang, W. Wang, X. Wang, Y. F. Wang, Z. Wang, Z. Wang, Z. M. Wang, H. Y. Wei, L. J. Wen, K. Whisnant, C. G. White, L. Whitehead, T. Wise, H. L. H. Wong, S. C. F. Wong, E. Worcester, C. -H. Wu, Q. Wu, W. J. Wu, D. M. Xia, J. K. Xia, Z. Z. Xing, J. Y. Xu, J. L. Xu, Y. Xu, T. Xue, C. G. Yang, H. Yang, L. Yang, M. S. Yang, M. T. Yang, M. Ye, Z. Ye, M. Yeh, B. L. Young, Z. Y. Yu, S. Zeng, L. Zhan, C. Zhang, H. H. Zhang, J. W. Zhang, Q. M. Zhang, X. T. Zhang, Y. M. Zhang, Y. X. Zhang, Y. M. Zhang, Z. J. Zhang, Z. Y. Zhang, Z. P. Zhang, J. Zhao, Q. W. Zhao, Y. B. Zhao, W. L. Zhong, L. Zhou, N. Zhou, H. L. Zhuang, J. H. Zou

This Letter reports an improved search for light sterile neutrino mixing in the electron antineutrino disappearance channel with the full configuration of the Daya Bay Reactor Neutrino Experiment. With an additional 404 days of data collected in eight antineutrino detectors, this search benefits from 3.6 times the statistics available to the previous publication, as well as from improvements in energy calibration and background reduction. Read More

2016Jul
Authors: Daya Bay, MINOS Collaborations, :, P. Adamson, F. P. An, I. Anghel, A. Aurisano, A. B. Balantekin, H. R. Band, G. Barr, M. Bishai, A. Blake, S. Blyth G. J. Bock, D. Bogert, D. Cao, G. F. Cao, J. Cao, S. V. Cao, T. J. Carroll, C. M. Castromonte, W. R. Cen, Y. L. Chan, J. F. Chang, L. C. Chang, Y. Chang, H. S. Chen, Q. Y. Chen, R. Chen, S. M. Chen, Y. Chen, Y. X. Chen, J. Cheng, J. -H. Cheng, Y. P. Chen, Z. K. Cheng, J. J. Cherwinka, S. Childress, M. C. Chu, A. Chukanov, J. A. B. Coelho, L. Corwin, D. Cronin-Hennessy, J. P. Cummings, J. de Arcos, S. De Rijck, Z. Y. Deng, A. V. Devan, N. E. Devenish, X. F. Ding, Y. Y. Ding, M. V. Diwan, M. Dolgareva, J. Dove, D. A. Dwyer, W. R. Edwards, C. O. Escobar, J. J. Evans, E. Falk, G. J. Feldman, W. Flanagan, M. V. Frohne, M. Gabrielyan, H. R. Gallagher, S. Germani, R. Gill, R. A. Gomes, M. Gonchar, G. H. Gong, H. Gong, M. C. Goodman, P. Gouffon, N. Graf, R. Gran, M. Grassi, K. Grzelak, W. Q. Gu, M. Y. Guan, L. Guo, R. P. Guo, X. H. Guo, Z. Guo, A. Habig, R. W. Hackenburg, S. R. Hahn, R. Han, S. Hans, J. Hartnell, R. Hatcher, M. He, K. M. Heeger, Y. K. Heng, A. Higuera, A. Holin, Y. K. Hor, Y. B. Hsiung, B. Z. Hu, T. Hu, W. Hu, E. C. Huang, H. X. Huang, J. Huang, X. T. Huang, P. Huber, W. Huo, G. Hussain, J. Hylen, G. M. Irwin, Z. Isvan, D. E. Jaffe, P. Jaffke, C. James, K. L. Jen, D. Jensen, S. Jetter, X. L. Ji, X. P. Ji, J. B. Jiao, R. A. Johnson, J. K. de Jong, J. Joshi, T. Kafka, L. Kang, S. M. S. Kasahara, S. H. Kettell, S. Kohn, G. Koizumi, M. Kordosky, M. Kramer, A. Kreymer, 1 K. K. Kwan, M. W. Kwok, T. Kwok, K. Lang, T. J. Langford, K. Lau, L. Lebanowski, J. Lee, J. H. C. Lee, R. T. Lei, R. Leitner, J. K. C. Leung, C. Li, D. J. Li, F. Li, G. S. Li, Q. J. Li, S. Li, S. C. Li, W. D. Li, X. N. Li, Y. F. Li, Z. B. Li, H. Liang, C. J. Lin, G. L. Lin, S. Lin, S. K. Lin, Y. -C. Lin, J. J. Ling J. M. Link, P. J. Litchfield, L. Littenberg, B. R. Littlejohn, D. W. Liu, J. C. Liu, J. L. Liu, C. W. Loh, C. Lu, H. Q. Lu, J. S. Lu, P. Lucas, K. B. Luk, Z. Lv, Q. M. Ma, X. B. Ma, X. Y. Ma, Y. Q. Ma, Y. Malyshkin, W. A. Mann, M. L. Marshak, D. A. Martinez Caicedo, N. Mayer, K. T. McDonald, C. McGivern, R. D. McKeown, M. M. Medeiros, R. Mehdiyev, J. R. Meier, M. D. Messier, W. H. Miller, S. R. Mishra, I. Mitchell, M. Mooney, C. D. Moore, L. Mualem, J. Musser, Y. Nakajima, D. Naples, J. Napolitano, D. Naumov, E. Naumova, J. K. Nelson, H. B. Newman, H. Y. Ngai, R. J. Nichol, Z. Ning, A. Nowak, J. O'Connor, J. P. Ochoa-Ricoux, A. Olshevskiy, M. Orchanian, R., R. B. Pahlka, J. Paley, H. -R. Pan, J. Park, R. B. Patterson, S. Patton, G. Pawloski, V. Pec, J. C. Peng, A. Perch, M. M. Pfutzner, D. D. Phan, S. Phan-Budd, L. Pinsky, R. K. Plunkett, N. Poonthottathil, C. S. J. Pun, F. Z. Qi, M. Qi, X. Qian, X. Qiu, A. Radovic, N. Raper, B. Rebel, J. Ren, C. Rosenfeld, R. Rosero, B. Roskovec, X. C. Ruan, H. A. Rubin, P. Sail, M. C. Sanchez, J. Schneps, A. Schreckenberger, P. Schreiner, R. Sharma, S. Moed Sher, A. Sousa, H. Steiner, G. X. Sun, J. L. Sun, N. Tagg, R. L. Talaga, W. Tang, D. Taychenachev, J. Thomas, M. A. Thomson, X. Tian A. Timmons, J. Todd, S. C. Tognini, R. Toner, D. Torretta, K. Treskov, K. V. Tsang, C. E. Tull, G. Tzanakos, J. Urheim, P. Vahle, N. Viaux, B. Viren, V. Vorobel, C. H. Wang, M. Wang, N. Y. Wang, R. G. Wang, W. Wang, X. Wang, Y. F. Wang, Z. Wang, Z. M. Wang, R. C. Webb, A. Weber, H. Y. Wei, L. J. Wen, K. Whisnant, C. White, L. Whitehead L. H. Whitehead, T. Wise, S. G. Wojcicki, H. L. H. Wong, S. C. F. Wong, E. Worcester, C. -H. Wu, Q. Wu, W. J. Wu, D. M. Xia, J. K. Xia, Z. Z. Xing, J. L. Xu, J. Y. Xu, Y. Xu, T. Xue, C. G. Yang, H. Yang, L. Yang, M. S. Yang, M. T. Yang, M. Ye., Z. Ye, M. Yeh, B. L. Young, Z. Y. Yu, S. Zeng, L. ZhanC. Zhang, H. H. Zhang, J. W. Zhang, Q. M. Zhang, X. T. Zhang, Y. M. Zhang, Y. X. Zhang, Z. J. Zhang, Z. P. Zhang, Z. Y. Zhang, J. Zhao, Q. W. Zhao, Y. B. Zhao, W. L. Zhong, L. Zhou, N. Zhou, H. L. Zhuang, J. H. Zou

Searches for a light sterile neutrino have been performed independently by the MINOS and the Daya Bay experiments using the muon (anti)neutrino and electron antineutrino disappearance channels, respectively. In this Letter, results from both experiments are combined with those from the Bugey-3 reactor neutrino experiment to constrain oscillations into light sterile neutrinos. The three experiments are sensitive to complementary regions of parameter space, enabling the combined analysis to probe regions allowed by the LSND and MiniBooNE experiments in a minimally extended four-neutrino flavor framework. Read More

2016Mar
Authors: Daya Bay Collaboration, F. P. An, A. B. Balantekin, H. R. Band, M. Bishai, S. Blyth, D. Cao, G. F. Cao, J. Cao, W. R. Cen, Y. L. Chan, J. F. Chang, L. C. Chang, Y. Chang, H. S. Chen, Q. Y. Chen, S. M. Chen, Y. X. Chen, Y. Chen, J. H. Cheng, J. -H. Cheng, J. Cheng, Y. P. Cheng, Z. K. Cheng, J. J. Cherwinka, M. C. Chu, A. Chukanov, J. P. Cummings, J. de Arcos, Z. Y. Deng, X. F. Ding, Y. Y. Ding, M. V. Diwan, M. Dolgareva, J. Dove, D. A. Dwyer, W. R. Edwards, R. Gill, M. Gonchar, G. H. Gong, H. Gong, M. Grassi, W. Q. Gu, M. Y. Guan, L. Guo, R. P. Guo, X. H. Guo, Z. Guo, R. W. Hackenburg, R. Han, S. Hans, M. He, K. M. Heeger, Y. K. Heng, A. Higuera, Y. K. Hor, Y. B. Hsiung, B. Z. Hu, T. Hu, W. Hu, E. C. Huang, H. X. Huang, X. T. Huang, P. Huber, W. Huo, G. Hussain, D. E. Jaffe, P. Jaffke, K. L. Jen, S. Jetter, X. P. Ji, X. L. Ji, J. B. Jiao, R. A. Johnson, J. Joshi, L. Kang, S. H. Kettell, S. Kohn, M. Kramer, K. K. Kwan, M. W. Kwok, T. Kwok, T. J. Langford, K. Lau, L. Lebanowski, J. Lee, J. H. C. Lee, R. T. Lei, R. Leitner, J. K. C. Leung, C. Li, D. J. Li, F. Li, G. S. Li, Q. J. Li, S. Li, S. C. Li, W. D. Li, X. N. Li, Y. F. Li, Z. B. Li, H. Liang, C. J. Lin, G. L. Lin, S. Lin, S. K. Lin, Y. -C. Lin, J. J. Ling, J. M. Link, L. Littenberg, B. R. Littlejohn, D. W. Liu, J. J. Liu, J. L. Liu, J. C. Liu, C. W. Loh, C. Lu, H. Q. Lu, J. S. Lu, K. B. Luk, Z. Lv, Q. M. Ma, X. Y. Ma, X. B. Ma, Y. Q. Ma, Y. Malyshkin, D. A. Martinez Caicedo, K. T. McDonald, R. D. McKeown, I. Mitchell, M. Mooney, Y. Nakajima, J. Napolitano, D. Naumov, E. Naumova, H. Y. Ngai, Z. Ning, J. P. Ochoa-Ricoux, A. Olshevskiy, H. -R. Pan, J. Park, S. Patton, V. Pec, J. C. Peng, L. Pinsky, C. S. J. Pun, F. Z. Qi, M. Qi, X. Qian, N. Raper, J. Ren, R. Rosero, B. Roskovec, X. C. Ruan, H. Steiner, G. X. Sun, J. L. Sun, W. Tang, D. Taychenachev, T. Konstantin, K. V. Tsang, C. E. Tull, N. Viaux, B. Viren, V. Vorobel, C. H. Wang, M. Wang, N. Y. Wang, R. G. Wang, W. Wang, W. W. Wang, X. Wang, Y. F. Wang, Z. Wang, Z. Wang, Z. M. Wang, H. Y. Wei, L. J. Wen, K. Whisnant, C. G. White, L. Whitehead, T. Wise, H. L. H. Wong, S. C. F. Wong, E. Worcester, C. -H. Wu, Q. Wu, D. M. Xia, J. K. Xia, Z. Z. Xing, J. Y. Xu, J. L. Xu, J. Xu, Y. Xu, T. Xue, J. Yan, C. G. Yang, H. Yang, L. Yang, M. S. Yang, M. T. Yang, M. Ye, Z. Ye, M. Yeh, B. L. Young, G. Y. Yu, Z. Y. Yu, L. Zhan, C. Zhang, H. H. Zhang, J. W. Zhang, Q. M. Zhang, X. T. Zhang, Y. M. Zhang, Y. X. Zhang, Y. M. Zhang, Z. J. Zhang, Z. Y. Zhang, Z. P. Zhang, J. Zhao, Q. W. Zhao, Y. F. Zhao, Y. B. Zhao, W. L. Zhong, L. Zhou, N. Zhou, H. L. Zhuang, J. H. Zou

This article reports an improved independent measurement of neutrino mixing angle $\theta_{13}$ at the Daya Bay Reactor Neutrino Experiment. Electron antineutrinos were identified by inverse $\beta$-decays with the emitted neutron captured by hydrogen, yielding a data-set with principally distinct uncertainties from that with neutrons captured by gadolinium. With the final two of eight antineutrino detectors installed, this study used 621 days of data including the previously reported 217-day data set with six detectors. Read More

The channel loss incurred in long-distance transmission places a significant burden on quantum key distribution (QKD) systems: they must defeat a passive eavesdropper who detects all the light lost in the quantum channel and does so without disturbing the light that reaches the intended destination. The current QKD implementation with the highest long-distance secret-key rate meets this challenge by transmitting no more than one photon per bit [Opt. Express 21, 24550-24565 (2013)]. Read More

2015Aug
Authors: Daya Bay Collaboration, F. P. An, A. B. Balantekin, H. R. Band, M. Bishai, S. Blyth, I. Butorov, D. Cao, G. F. Cao, J. Cao, W. R. Cen, Y. L. Chan, J. F. Chang, L. C. Chang, Y. Chang, H. S. Chen, Q. Y. Chen, S. M. Chen, Y. X. Chen, Y. Chen, J. H. Cheng, J. Cheng, Y. P. Cheng, J. J. Cherwinka, M. C. Chu, J. P. Cummings, J. de Arcos, Z. Y. Deng, X. F. Ding, Y. Y. Ding, M. V. Diwan, J. Dove, E. Draeger, D. A. Dwyer, W. R. Edwards, S. R. Ely, R. Gill, M. Gonchar, G. H. Gong, H. Gong, M. Grassi, W. Q. Gu, M. Y. Guan, L. Guo, X. H. Guo, R. W. Hackenburg, R. Han, S. Hans, M. He, K. M. Heeger, Y. K. Heng, A. Higuera, Y. K. Hor, Y. B. Hsiung, B. Z. Hu, L. M. Hu, L. J. Hu, T. Hu, W. Hu, E. C. Huang, H. X. Huang, X. T. Huang, P. Huber, G. Hussain, D. E. Jaffe, P. Jaffke, K. L. Jen, S. Jetter, X. P. Ji, X. L. Ji, J. B. Jiao, R. A. Johnson, L. Kang, S. H. Kettell, S. Kohn, M. Kramer, K. K. Kwan, M. W. Kwok, T. Kwok, T. J. Langford, K. Lau, L. Lebanowski, J. Lee, R. T. Lei, R. Leitner, K. Y. Leung, J. K. C. Leung, C. A. Lewis, D. J. Li, F. Li, G. S. Li, Q. J. Li, S. C. Li, W. D. Li, X. N. Li, X. Q. Li, Y. F. Li, Z. B. Li, H. Liang, C. J. Lin, G. L. Lin, P. Y. Lin, S. K. Lin, J. J. Ling, J. M. Link, L. Littenberg, B. R. Littlejohn, D. W. Liu, H. Liu, J. L. Liu, J. C. Liu, S. S. Liu, C. Lu, H. Q. Lu, J. S. Lu, K. B. Luk, Q. M. Ma, X. Y. Ma, X. B. Ma, Y. Q. Ma, D. A. Martinez Caicedo, K. T. McDonald, R. D. McKeown, Y. Meng, I. Mitchell, J. Monari Kebwaro, Y. Nakajima, J. Napolitano, D. Naumov, E. Naumova, H. Y. Ngai, Z. Ning, J. P. Ochoa-Ricoux, A. Olshevski, H. -R. Pan, J. Park, S. Patton, V. Pec, J. C. Peng, L. E. Piilonen, L. Pinsky, C. S. J. Pun, F. Z. Qi, M. Qi, X. Qian, N. Raper, B. Ren, J. Ren, R. Rosero, B. Roskovec, X. C. Ruan, B. B. Shao, H. Steiner, G. X. Sun, J. L. Sun, W. Tang, D. Taychenachev, K. V. Tsang, C. E. Tull, Y. C. Tung, N. Viaux, B. Viren, V. Vorobel, C. H. Wang, M. Wang, N. Y. Wang, R. G. Wang, W. Wang, W. W. Wang, X. Wang, Y. F. Wang, Z. Wang, Z. Wang, Z. M. Wang, H. Y. Wei, L. J. Wen, K. Whisnant, C. G. White, L. Whitehead, T. Wise, H. L. H. Wong, S. C. F. Wong, E. Worcester, Q. Wu, D. M. Xia, J. K. Xia, X. Xia, Z. Z. Xing, J. Y. Xu, J. L. Xu, J. Xu, Y. Xu, T. Xue, J. Yan, C. G. Yang, L. Yang, M. S. Yang, M. T. Yang, M. Ye, M. Yeh, B. L. Young, G. Y. Yu, Z. Y. Yu, S. L. Zang, L. Zhan, C. Zhang, H. H. Zhang, J. W. Zhang, Q. M. Zhang, Y. M. Zhang, Y. X. Zhang, Y. M. Zhang, Z. J. Zhang, Z. Y. Zhang, Z. P. Zhang, J. Zhao, Q. W. Zhao, Y. F. Zhao, Y. B. Zhao, L. Zheng, W. L. Zhong, L. Zhou, N. Zhou, H. L. Zhuang, J. H. Zou

This Letter reports a measurement of the flux and energy spectrum of electron antineutrinos from six 2.9~GW$_{th}$ nuclear reactors with six detectors deployed in two near (effective baselines 512~m and 561~m) and one far (1,579~m) underground experimental halls in the Daya Bay experiment. Using 217 days of data, 296,721 and 41,589 inverse beta decay (IBD) candidates were detected in the near and far halls, respectively. Read More

2015Aug
Authors: F. P. An, J. Z. Bai, A. B. Balantekin, H. R. Band, D. Beavis, W. Beriguete, M. Bishai, S. Blyth, R. L. Brown, I. Butorov, D. Cao, G. F. Cao, J. Cao, R. Carr, W. R. Cen, W. T. Chan, Y. L. Chan, J. F. Chang, L. C. Chang, Y. Chang, C. Chasman, H. Y. Chen, H. S. Chen, M. J. Chen, Q. Y. Chen, S. J. Chen, S. M. Chen, X. C. Chen, X. H. Chen, X. S. Chen, Y. X. Chen, Y. Chen, J. H. Cheng, J. Cheng, Y. P. Cheng, J. J. Cherwinka, S. Chidzik, K. Chow, M. C. Chu, J. P. Cummings, J. de Arcos, Z. Y. Deng, X. F. Ding, Y. Y. Ding, M. V. Diwan, L. Dong, J. Dove, E. Draeger, X. F. Du, D. A. Dwyer, W. R. Edwards, S. R. Ely, S. D. Fang, J. Y. Fu, Z. W. Fu, L. Q. Ge, V. Ghazikhanian, R. Gill, J. Goett, M. Gonchar, G. H. Gong, H. Gong, Y. A. Gornushkin, M. Grassi, L. S. Greenler, W. Q. Gu, M. Y. Guan, R. P. Guo, X. H. Guo, R. W. Hackenburg, R. L. Hahn, R. Han, S. Hans, M. He, Q. He, W. S. He, K. M. Heeger, Y. K. Heng, A. Higuera, P. Hinrichs, T. H. Ho, M. Hoff, Y. K. Hor, Y. B. Hsiung, B. Z. Hu, L. M. Hu, L. J. Hu, T. Hu, W. Hu, E. C. Huang, H. Z. Huang, H. X. Huang, P. W. Huang, X. Huang, X. T. Huang, P. Huber, G. Hussain, Z. Isvan, D. E. Jaffe, P. Jaffke, K. L. Jen, S. Jetter, X. P. Ji, X. L. Ji, H. J. Jiang, W. Q. Jiang, J. B. Jiao, R. A. Johnson, J. Joseph, L. Kang, S. H. Kettell, S. Kohn, M. Kramer, K. K. Kwan, M. W. Kwok, T. Kwok, C. Y. Lai, W. C. Lai, W. H. Lai, T. J. Langford, K. Lau, L. Lebanowski, J. Lee, M. K. P. Lee, R. T. Lei, R. Leitner, J. K. C. Leung, K. Y. Leung, C. A. Lewis, B. Li, C. Li, D. J. Li, F. Li, G. S. Li, J. Li, N. Y. Li, Q. J. Li, S. F. Li, S. C. Li, W. D. Li, X. B. Li, X. N. Li, X. Q. Li, Y. Li, Y. F. Li, Z. B. Li, H. Liang, J. Liang, C. J. Lin, G. L. Lin, P. Y. Lin, S. X. Lin, S. K. Lin, Y. C. Lin, J. J. Ling, J. M. Link, L. Littenberg, B. R. Littlejohn, B. J. Liu, C. Liu, D. W. Liu, H. Liu, J. L. Liu, J. C. Liu, S. Liu, S. S. Liu, X. Liu, Y. B. Liu, C. Lu, H. Q. Lu, J. S. Lu, A. Luk, K. B. Luk, T. Luo, X. L. Luo, L. H. Ma, Q. M. Ma, X. Y. Ma, X. B. Ma, Y. Q. Ma, B. Mayes, K. T. McDonald, M. C. McFarlane, R. D. McKeown, Y. Meng, I. Mitchell, D. Mohapatra, J. Monari Kebwaro, J. E. Morgan, Y. Nakajima, J. Napolitano, D. Naumov, E. Naumova, C. Newsom, H. Y. Ngai, W. K. Ngai, Y. B. Nie, Z. Ning, J. P. Ochoa-Ricoux, A. Olshevskiy, A. Pagac, H. -R. Pan, S. Patton, C. Pearson, V. Pec, J. C. Peng, L. E. Piilonen, L. Pinsky, C. S. J. Pun, F. Z. Qi, M. Qi, X. Qian, N. Raper, B. Ren, J. Ren, R. Rosero, B. Roskovec, X. C. Ruan, W. R. Sands III, B. Seilhan, B. B. Shao, K. Shih, W. Y. Song, H. Steiner, P. Stoler, M. Stuart, G. X. Sun, J. L. Sun, N. Tagg, Y. H. Tam, H. K. Tanaka, W. Tang, X. Tang, D. Taychenachev, H. Themann, Y. Torun, S. Trentalange, O. Tsai, K. V. Tsang, R. H. M. Tsang, C. E. Tull, Y. C. Tung, N. Viaux, B. Viren, S. Virostek, V. Vorobel, C. H. Wang, L. S. Wang, L. Y. Wang, L. Z. Wang, M. Wang, N. Y. Wang, R. G. Wang, T. Wang, W. Wang, W. W. Wang, X. T. Wang, X. Wang, Y. F. Wang, Z. Wang, Z. Wang, Z. M. Wang, D. M. Webber, H. Y. Wei, Y. D. Wei, L. J. Wen, D. L. Wenman, K. Whisnant, C. G. White, L. Whitehead, C. A. Whitten Jr., J. Wilhelmi, T. Wise, H. C. Wong, H. L. H. Wong, J. Wong, S. C. F. Wong, E. Worcester, F. F. Wu, Q. Wu, D. M. Xia, J. K. Xia, S. T. Xiang, Q. Xiao, Z. Z. Xing, G. Xu, J. Y. Xu, J. L. Xu, J. Xu, W. Xu, Y. Xu, T. Xue, J. Yan, C. G. Yang, L. Yang, M. S. Yang, M. T. Yang, M. Ye, M. Yeh, Y. S. Yeh, K. Yip, B. L. Young, G. Y. Yu, Z. Y. Yu, S. Zeng, L. Zhan, C. Zhang, F. H. Zhang, H. H. Zhang, J. W. Zhang, K. Zhang, Q. X. Zhang, Q. M. Zhang, S. H. Zhang, X. T. Zhang, Y. C. Zhang, Y. H. Zhang, Y. M. Zhang, Y. X. Zhang, Y. M. Zhang, Z. J. Zhang, Z. Y. Zhang, Z. P. Zhang, J. Zhao, Q. W. Zhao, Y. F. Zhao, Y. B. Zhao, L. Zheng, W. L. Zhong, L. Zhou, N. Zhou, Z. Y. Zhou, H. L. Zhuang, S. Zimmerman, J. H. Zou

The Daya Bay experiment was the first to report simultaneous measurements of reactor antineutrinos at multiple baselines leading to the discovery of $\bar{\nu}_e$ oscillations over km-baselines. Subsequent data has provided the world's most precise measurement of $\rm{sin}^22\theta_{13}$ and the effective mass splitting $\Delta m_{ee}^2$. The experiment is located in Daya Bay, China where the cluster of six nuclear reactors is among the world's most prolific sources of electron antineutrinos. Read More

We propose a two-way secure-communication protocol in which Alice uses an amplified spontaneous emission source while Bob employs binary phase-shift keying and an optical amplifier. Against an eavesdropper who captures all the light lost in fibers linking Alice and Bob, this protocol is capable of 3.5 Gbps quantum-secured direct communication at 50 km range. Read More

A framework is established for evaluating {\sc cphase} gates that use single-photon cross-phase modulation (XPM) originating from the Kerr nonlinearity. Prior work Phys. Rev. Read More

Imaging through opaque, highly scattering walls is a long sought after capability with potential applications in a variety of fields. The use of wavefront shaping to compensate for scattering has brought a renewed interest as a potential solution to this problem. A key to the practicality of any imaging technique is the capability to focus light without direct access behind the scattering wall. Read More

The coronal magnetic field is the primary driver of solar dynamic events. Linear and circular polarization signals of certain infrared coronal emission lines contain information about the magnetic field, and to access this information, either a forward or an inversion method must be used. We study three coronal magnetic configurations that are applicable to polar-crown filament cavities by doing forward calculations to produce synthetic polarization data. Read More

Quantum computers are unnecessary for exponentially-efficient computation or simulation if the Extended Church-Turing thesis---a foundational tenet of computer science---is correct. The thesis would be directly contradicted by a physical device that efficiently performs a task believed to be intractable for classical computers. Such a task is BosonSampling: obtaining a distribution of n bosons scattered by some linear-optical unitary process. Read More

We present spectral fits and timing analysis of Rossi X-ray Timing Explorer observations of GX339-4. These observations were carried out over a span of more than two years and encompassed both the soft/high and hard/low states. Hysteresis in the soft state/hard state transition is observed. Read More

2000May
Affiliations: 1JILA, 2IAA Tuebingen, Astronomie, 3CASS, UCSD, 4IAA Tuebingen, Astronomie, 5CASA CU Boulder, 6JILA
Category: Astrophysics

We present results from 170ksec long RXTE observations of LMC X-1 and LMC X-3, taken in 1996 December, where their spectra can be described by a disc black body plus an additional soft (Gamma~2.8) high-energy power-law (detected up to 50keV in LMC X-3). These observations, as well as archival ASCA observations, constrain any narrow Fe line present in the spectra to have an equivalent width <90eV, broad lines (~150eV EW, \sigma ~ 1keV) are permitted. Read More

2000May
Affiliations: 1IAA Tuebingen, Astronomie, 2JILA, Boulder, 3IAA Tuebingen, Astronomie, 4CASS, UCSD, 5CASA, CU Boulder, 6JILA, Boulder
Category: Astrophysics

We present the analysis of an RXTE monitoring campaign of the canonical soft state black hole candidates LMC X-1 and LMC X-3. In contrast to LMC X-1, which does not exhibit any periodic spectral changes, we find that LMC X-3 exhibits stron spectral variability on time scales of days to weeks. For typical RXTE ASM count rates, the luminosity variations of LMC X-3 are due to changes of the phenomenological disk blackbody temperature. Read More

1999Oct
Affiliations: 1IAA Tuebingen, 2JILA, Boulder, 3IAA Tuebingen, 4CASS, UCSD, 5Metropolitan State College, Denver, 6JILA, Boulder, 7IAA Tuebingen
Category: Astrophysics

The black hole candidate LMC X-3 varies by a factor of four in the soft X-rays on a timescale of 200 or 100days. We have monitored LMC X-3 with RXTE in three to four week intervals starting in December 1996, obtaining a large observational database that sheds light on the nature of the long term X-ray variability in this source. In this paper we present the results of this monitoring campaign, focusing on evidence of recurring hard states in this canonical soft state black hole candidate. Read More

1999Oct
Affiliations: 1IAA Tuebingen, 2IAA Tuebingen, 3IAA Tuebingen, 4Jila, Boulder, 5Metropolitan State College, Denver, 6CASS, UCSD, 7SSL, UCB
Category: Astrophysics

We present first results from the spectral and temporal analysis of an RXTE monitoring campaign of the black hole candidate Cygnus X-1 in 1999. The timing properties of this hard state black hole show considerable variability, even though the state does not change. This has previously been noted for the power spectral density, but is probably even more pronounced for the time lags. Read More

1999Apr
Affiliations: 1IAA-Tuebingen, 2JILA-University of Colorado, 3CASA-University of Colorado, 4Astronomical Institute `Anton Pannekoek', University of Amsterdam, 5IoA, Cambridge, current address CfA, Cambridge
Category: Astrophysics

We discuss a series of observations of the black hole candidate GX 339-4 in low luminosity, spectrally hard states. We present spectral analysis of three separate archival Advanced Satellite for Cosmology and Astrophysics (ASCA) data sets and eight separate Rossi X-ray Timing Explorer (RXTE) data sets. Three of the RXTE observations were strictly simultaneous with 843 MHz and 8. Read More

1999Mar
Affiliations: 1CASA, Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO, 2CASA, Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO, 3Osservatorio Astrofisico di Arcetri, Firenze, Italy
Category: Astrophysics

By solving the time-dependent radiation transfer problem of stellar radiation through evolving superbubbles within a smoothly varying HI distribution, we estimate the fraction of ionizing photons emitted by OB associations that escapes the HI disk of our Galaxy into the halo and intergalactic medium (IGM). We consider both coeval star-formation and a Gaussian star-formation history with a time spread sigma_t = 2 Myr. We consider both a uniform H I distribution and a two-phase (cloud/intercloud) model, with a negligible filling factor of hot gas. Read More

Here we present timing analysis of a set of eight Rossi X-ray Timing Explorer (RXTE) observations of the black hole candidate GX 339-4 that were taken during its hard/low state. On long time scales, the RXTE All Sky Monitor data reveal evidence of a 240 day periodicity, comparable to timescales expected from warped, precessing accretion disks. On short timescales all observations save one show evidence of a persistent f approximately equal to 0. Read More

1998Nov
Affiliations: 1University of Arizona, Tucson, 2CASA, University of Colorado, Boulder
Category: Astrophysics

The spectrum of Seyfert 1 Galaxies is very similar to that of several Galactic Black Hole Candidates (GBHCs) in their hard state, suggestive that both classes of objects have similar physical processes. While it appears that an accretion disk corona (ADC) model, where the corona sandwiches the cold accretion disk, is capable of explaining the observations of Seyfert galaxies, recent work has shown that this model is problematic for GBHCs. To address the differences in the spectra of Seyferts and GBHCs, we consider the structure of the atmosphere of the accretion disk in a region near an active magnetic flare (we refer to this region as transition layer). Read More

We have recently shown that a `sphere+disk' geometry Compton corona model provides a good description of Rossi X-ray Timing Explorer (RXTE) observations of the hard/low state of Cygnus X--1. Separately, we have analyzed the temporal data provided by RXTE. In this paper we consider the implications of this timing analysis for our best-fit `sphere+disk' Comptonization models. Read More

1998Oct
Affiliations: 1Institute for Astronomy and Astrophysics, Tuebingen, Astronomy, 2Institute for Astronomy and Astrophysics, Tuebingen, Astronomy, 3JILA, University of Colorado, 4CASA, University of Colorado, 5JILA, University of Colorado, 6Institute for Astronomy and Astrophysics, Tuebingen, Astronomy
Category: Astrophysics

We present results from a 20 ksec RXTE observation of the black hole candidate Cyg X-1. We apply self-consistent accretion disk corona models to these hard state data and show that Comptonization in a spherical corona irradiated by soft photons from an exterior cold disk is able to successfully model the spectrum. We also present the power spectrum, the coherence function, and the time lags for lightcurves from four energy bands. Read More

1998Oct
Affiliations: 1Institute for Astronomy and Astrophysics, Tuebingen, Astronomy, 2JILA, University of Colorado, 3CASA, University of Colorado, 4Institute for Astronomy and Astrophysics, Tuebingen, Astronomy, 5CASS, University of California at San Diego, 6JILA, University of Colorado, 7Institute for Astronomy and Astrophysics, Tuebingen, Astronomy
Category: Astrophysics

Of all known persistent stellar-mass black hole candidates, only LMC X-1 and LMC X-3 consistently show spectra that are dominated by a soft, thermal component. We present results from long (170ksec) Rossi X-ray Timing Explorer (RXTE) observations of LMC X-1 and LMC X-3 made in 1996 December. The spectra can be described by a multicolor disk blackbody plus an additional high-energy power-law. Read More

We present timing analysis for a Rossi X-ray Timing Explorer observation of Cygnus X-1 in its hard/low state. This was the first RXTE observation of Cyg X-1 taken after it transited back to this state from its soft/high state. RXTE's large effective area, superior timing capabilities, and ability to obtain long, uninterrupted observations have allowed us to obtain measurements of the power spectral density (PSD), coherence function, and Fourier time lags to a decade lower in frequency and half a decade higher in frequency than typically was achieved with previous instruments. Read More

There have been a number of recent spectral models that have been successful in reproducing the observed X-ray spectra of galactic black hole candidates (GBHC). However, there still exists controversy over such issues as: what are the sources of hard radiation, what is the system's geometry, is the accretion efficient or inefficient, etc. A potentially powerful tool for distinguishing among these possibilities, made possible by the Rossi X-ray Timing Explorer (RXTE), is the variability data, especially the observed phase lags and variability coherence. Read More

1997Jul
Affiliations: 1JILA, Boulder, CO, 2Institute for Astronomy and Astrophysics, Tuebingen, Germany, 3JILA, Boulder, CO, 4Space Radiation Laboratory, Pasadena, CA, 5JILA, Boulder, CO
Category: Astrophysics

We present the results of the analysis of the broad-band spectrum of Cygnus X-1 from 3.0 to 200 keV, using data from a 10 ksec observation by the Rossi X-ray Timing Explorer. The spectrum can be well described phenomenologically by an exponentially cut-off power law with a photon index Gamma = 1. Read More

1997May
Affiliations: 1JILA, Boulder, CO, 2Institute for Astronomy and Astrophysics, Tuebingen, Germany, 3Institute for Astronomy and Astrophysics, Tuebingen, Germany, 4JILA, Boulder, CO
Category: Astrophysics

We apply our self-consistent accretion disk corona (ADC) model, with two different geometries, to the broad-band X-ray spectrum of the black hole candidate Cygnus X-1. As shown in a companion paper (Dove, Wilms, and Begelman), models where the Comptonizing medium is a slab surrounding the cold accretion disk cannot have a temperature higher than about 120 keV for optical depths greater than 0.2, resulting in spectra that are much softer than the observed 10-30 keV spectrum of Cyg X-1. Read More

1997May
Affiliations: 1JILA, Boulder, CO, 2Institute for Astronomy and Astrophysics, Tuebingen, Germany, 3JILA, Boulder, CO
Category: Astrophysics

We present the properties of accretion disk corona (ADC) models, where the radiation field, the temperature, and the total opacity of the corona are determined self-consistently. We use a non-linear Monte Carlo code to perform the calculations. As an example, we discuss models where the corona is situated above and below a cold accretion disk with a plane-parallel (slab) geometry, similar to the model of Haardt and Maraschi. Read More

1996Oct
Affiliations: 1JILA, 2Caltech, 3JILA, 4IAA-Tuebingen
Category: Astrophysics

With the advent of RXTE, which is capable of broad spectral coverage and fast timing, as well as other instruments which are increasingly being used in multi-wavelength campaigns (via both space-based and ground-based observations), we must demand more of our theoretical models. No current model mimics all facets of a system as complex as an x-ray binary. However, a modern theory should qualitatively reproduce -- or at the very least not fundamentally disagree with - all of Cygnus X-1's most basic average properties: energy spectrum (viewed within a broader framework of black hole candidate spectral behavior), power spectrum (PSD), and time delays and coherence between variability in different energy bands. Read More