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Variable Very-High-Energy Gamma-Ray Emission from the Microquasar LS I +61 303.

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Title: Variable Very-High-Energy Gamma-Ray Emission from the Microquasar LS I +61 303.
Authors: Albert, J., Aliu, E., Anderhub, H., Antoranz, P., Armada, A., Asensio, M., Baixeras, C., Barrio, J. A., Bartelt, M., Bartko, H., Bastieri, D., Bavikadi, S. R., Bednarek, W., Berger, K., Bigongiari, C., A. Biland, Bisesi, E., Bock, R. K., Bordas, P., Bosch-Ramon, V.
Source: Science (pre-March 2025). 6/23/2006, Vol. 312 Issue 5781, p1771-1773. 3p. 2 Graphs.
Subjects: Cosmic rays, Relativistic particles, Particles (Nuclear physics), Atomization, Nuclear reactions, Nuclear physics, Scattering (Physics), Relativity (Physics), Physics
Abstract: Microquasars are binary star systems with relativistic radio-emitting jets. They are potential sources of cosmic rays and can be used to elucidate the physics of relativistic jets. We report the detection of variable gamma-ray emission above 100 gigaelectron volts from the microquasar LSI +61 303. Six orbital cycles were recorded. Several detections occur at a similar orbital phase, which suggests that the emission is periodic. The strongest gamma-ray emission is not observed when the two stars are closest to one another, implying a strong orbital modulation of the emission or absorption processes. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Variable Very-High-Energy Gamma-Ray Emission from the Microquasar LS I +61 303.
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  Data: <searchLink fieldCode="AR" term="%22Albert%2C+J%2E%22">Albert, J.</searchLink><br /><searchLink fieldCode="AR" term="%22Aliu%2C+E%2E%22">Aliu, E.</searchLink><br /><searchLink fieldCode="AR" term="%22Anderhub%2C+H%2E%22">Anderhub, H.</searchLink><br /><searchLink fieldCode="AR" term="%22Antoranz%2C+P%2E%22">Antoranz, P.</searchLink><br /><searchLink fieldCode="AR" term="%22Armada%2C+A%2E%22">Armada, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Asensio%2C+M%2E%22">Asensio, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Baixeras%2C+C%2E%22">Baixeras, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Barrio%2C+J%2E+A%2E%22">Barrio, J. A.</searchLink><br /><searchLink fieldCode="AR" term="%22Bartelt%2C+M%2E%22">Bartelt, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Bartko%2C+H%2E%22">Bartko, H.</searchLink><br /><searchLink fieldCode="AR" term="%22Bastieri%2C+D%2E%22">Bastieri, D.</searchLink><br /><searchLink fieldCode="AR" term="%22Bavikadi%2C+S%2E+R%2E%22">Bavikadi, S. R.</searchLink><br /><searchLink fieldCode="AR" term="%22Bednarek%2C+W%2E%22">Bednarek, W.</searchLink><br /><searchLink fieldCode="AR" term="%22Berger%2C+K%2E%22">Berger, K.</searchLink><br /><searchLink fieldCode="AR" term="%22Bigongiari%2C+C%2E%22">Bigongiari, C.</searchLink><br /><searchLink fieldCode="AR" term="%22A%2E+Biland%22">A. Biland</searchLink><br /><searchLink fieldCode="AR" term="%22Bisesi%2C+E%2E%22">Bisesi, E.</searchLink><br /><searchLink fieldCode="AR" term="%22Bock%2C+R%2E+K%2E%22">Bock, R. K.</searchLink><br /><searchLink fieldCode="AR" term="%22Bordas%2C+P%2E%22">Bordas, P.</searchLink><br /><searchLink fieldCode="AR" term="%22Bosch-Ramon%2C+V%2E%22">Bosch-Ramon, V.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 6/23/2006, Vol. 312 Issue 5781, p1771-1773. 3p. 2 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Cosmic+rays%22">Cosmic rays</searchLink><br /><searchLink fieldCode="DE" term="%22Relativistic+particles%22">Relativistic particles</searchLink><br /><searchLink fieldCode="DE" term="%22Particles+%28Nuclear+physics%29%22">Particles (Nuclear physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Atomization%22">Atomization</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+reactions%22">Nuclear reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+physics%22">Nuclear physics</searchLink><br /><searchLink fieldCode="DE" term="%22Scattering+%28Physics%29%22">Scattering (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Relativity+%28Physics%29%22">Relativity (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Physics%22">Physics</searchLink>
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  Data: Microquasars are binary star systems with relativistic radio-emitting jets. They are potential sources of cosmic rays and can be used to elucidate the physics of relativistic jets. We report the detection of variable gamma-ray emission above 100 gigaelectron volts from the microquasar LSI +61 303. Six orbital cycles were recorded. Several detections occur at a similar orbital phase, which suggests that the emission is periodic. The strongest gamma-ray emission is not observed when the two stars are closest to one another, implying a strong orbital modulation of the emission or absorption processes. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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