High statistics search for ultrahigh energy γ-ray emission from Cygnus X-3 and Hercules X-1
We have carried out a high statistics (2×109 events) search for ultrahigh energy γ-ray emission from the x-ray binary sources Cygnus X-3 and Hercules X-1. Using data taken with the CASA-MIA detector over a five year period (1990–1995), we find no evidence for steady emission from either source. The...
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E-Artikel |
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1997 |
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Online-Ressource 18 |
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APS Digital Backfile Archive 1893-2003 |
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| Übergeordnetes Werk: |
Enthalten in: Physical review / D - [S.l.] : Soc., 1970, 55(1997), 4, Seite 1714-1731 |
| Übergeordnetes Werk: |
volume:55 ; year:1997 ; number:4 ; pages:1714-1731 ; extent:18 |
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| 520 | |a We have carried out a high statistics (2×109 events) search for ultrahigh energy γ-ray emission from the x-ray binary sources Cygnus X-3 and Hercules X-1. Using data taken with the CASA-MIA detector over a five year period (1990–1995), we find no evidence for steady emission from either source. The derived 90 % C.L. upper limit to the steady integral flux of γ rays from Cygnus X-3 is Φ(E>115 TeV)<6.3×10-15 photons cm-2 sec-1, and from Hercules X-1 it is Φ(E>115 TeV)<8.5×10-15 photons cm-2 sec-1. These limits are more than two orders of magnitude lower than earlier claimed detections and are better than recent experiments operating in the same energy range. We have also searched for transient emission on time periods of one day and 0.5 h and find no evidence for such emission from either source. The typical daily limit on the integral γ-ray flux from Cygnus X-3 or Hercules X-1 is Φdaily(E>115 TeV)<2.0×10-13 photons cm-2 sec-1. For Cygnus X-3, we see no evidence for emission correlated with the 4.8 h x-ray periodicity or with the occurrence of large radio flares. Unless one postulates that these sources were very active earlier and are now dormant, the limits presented here put into question the earlier results, and highlight the difficulties that possible future experiments will have in detecting γ-ray signals at ultrahigh energies. | ||
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(DE-627)NLEJ250061406 (DE-601)aps:254334c87ed51ffe6f4469eecbaefe4a89af944c DE-627 ger DE-627 rakwb High statistics search for ultrahigh energy γ-ray emission from Cygnus X-3 and Hercules X-1 1997 Online-Ressource 18 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We have carried out a high statistics (2×109 events) search for ultrahigh energy γ-ray emission from the x-ray binary sources Cygnus X-3 and Hercules X-1. Using data taken with the CASA-MIA detector over a five year period (1990–1995), we find no evidence for steady emission from either source. The derived 90 % C.L. upper limit to the steady integral flux of γ rays from Cygnus X-3 is Φ(E>115 TeV)<6.3×10-15 photons cm-2 sec-1, and from Hercules X-1 it is Φ(E>115 TeV)<8.5×10-15 photons cm-2 sec-1. These limits are more than two orders of magnitude lower than earlier claimed detections and are better than recent experiments operating in the same energy range. We have also searched for transient emission on time periods of one day and 0.5 h and find no evidence for such emission from either source. The typical daily limit on the integral γ-ray flux from Cygnus X-3 or Hercules X-1 is Φdaily(E>115 TeV)<2.0×10-13 photons cm-2 sec-1. For Cygnus X-3, we see no evidence for emission correlated with the 4.8 h x-ray periodicity or with the occurrence of large radio flares. Unless one postulates that these sources were very active earlier and are now dormant, the limits presented here put into question the earlier results, and highlight the difficulties that possible future experiments will have in detecting γ-ray signals at ultrahigh energies. APS Digital Backfile Archive 1893-2003 Borione, A. oth Chantell, M. C. oth Covault, C. E. oth Cronin, J. W. oth Fick, B. E. oth Fowler, J. W. oth Fortson, L. F. oth Gibbs, K. G. oth Green, K. D. oth Newport, B. J. oth Ong, R. A. oth Oser, S. oth Rosenberg, L. J oth Enthalten in Physical review / D [S.l.] : Soc., 1970 55(1997), 4, Seite 1714-1731 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:55 year:1997 number:4 pages:1714-1731 extent:18 https://www.tib.eu/de/suchen/id/aps%3A254334c87ed51ffe6f4469eecbaefe4a89af944c Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 55 1997 4 1714-1731 18 |
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(DE-627)NLEJ250061406 (DE-601)aps:254334c87ed51ffe6f4469eecbaefe4a89af944c DE-627 ger DE-627 rakwb High statistics search for ultrahigh energy γ-ray emission from Cygnus X-3 and Hercules X-1 1997 Online-Ressource 18 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We have carried out a high statistics (2×109 events) search for ultrahigh energy γ-ray emission from the x-ray binary sources Cygnus X-3 and Hercules X-1. Using data taken with the CASA-MIA detector over a five year period (1990–1995), we find no evidence for steady emission from either source. The derived 90 % C.L. upper limit to the steady integral flux of γ rays from Cygnus X-3 is Φ(E>115 TeV)<6.3×10-15 photons cm-2 sec-1, and from Hercules X-1 it is Φ(E>115 TeV)<8.5×10-15 photons cm-2 sec-1. These limits are more than two orders of magnitude lower than earlier claimed detections and are better than recent experiments operating in the same energy range. We have also searched for transient emission on time periods of one day and 0.5 h and find no evidence for such emission from either source. The typical daily limit on the integral γ-ray flux from Cygnus X-3 or Hercules X-1 is Φdaily(E>115 TeV)<2.0×10-13 photons cm-2 sec-1. For Cygnus X-3, we see no evidence for emission correlated with the 4.8 h x-ray periodicity or with the occurrence of large radio flares. Unless one postulates that these sources were very active earlier and are now dormant, the limits presented here put into question the earlier results, and highlight the difficulties that possible future experiments will have in detecting γ-ray signals at ultrahigh energies. APS Digital Backfile Archive 1893-2003 Borione, A. oth Chantell, M. C. oth Covault, C. E. oth Cronin, J. W. oth Fick, B. E. oth Fowler, J. W. oth Fortson, L. F. oth Gibbs, K. G. oth Green, K. D. oth Newport, B. J. oth Ong, R. A. oth Oser, S. oth Rosenberg, L. J oth Enthalten in Physical review / D [S.l.] : Soc., 1970 55(1997), 4, Seite 1714-1731 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:55 year:1997 number:4 pages:1714-1731 extent:18 https://www.tib.eu/de/suchen/id/aps%3A254334c87ed51ffe6f4469eecbaefe4a89af944c Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 55 1997 4 1714-1731 18 |
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(DE-627)NLEJ250061406 (DE-601)aps:254334c87ed51ffe6f4469eecbaefe4a89af944c DE-627 ger DE-627 rakwb High statistics search for ultrahigh energy γ-ray emission from Cygnus X-3 and Hercules X-1 1997 Online-Ressource 18 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We have carried out a high statistics (2×109 events) search for ultrahigh energy γ-ray emission from the x-ray binary sources Cygnus X-3 and Hercules X-1. Using data taken with the CASA-MIA detector over a five year period (1990–1995), we find no evidence for steady emission from either source. The derived 90 % C.L. upper limit to the steady integral flux of γ rays from Cygnus X-3 is Φ(E>115 TeV)<6.3×10-15 photons cm-2 sec-1, and from Hercules X-1 it is Φ(E>115 TeV)<8.5×10-15 photons cm-2 sec-1. These limits are more than two orders of magnitude lower than earlier claimed detections and are better than recent experiments operating in the same energy range. We have also searched for transient emission on time periods of one day and 0.5 h and find no evidence for such emission from either source. The typical daily limit on the integral γ-ray flux from Cygnus X-3 or Hercules X-1 is Φdaily(E>115 TeV)<2.0×10-13 photons cm-2 sec-1. For Cygnus X-3, we see no evidence for emission correlated with the 4.8 h x-ray periodicity or with the occurrence of large radio flares. Unless one postulates that these sources were very active earlier and are now dormant, the limits presented here put into question the earlier results, and highlight the difficulties that possible future experiments will have in detecting γ-ray signals at ultrahigh energies. APS Digital Backfile Archive 1893-2003 Borione, A. oth Chantell, M. C. oth Covault, C. E. oth Cronin, J. W. oth Fick, B. E. oth Fowler, J. W. oth Fortson, L. F. oth Gibbs, K. G. oth Green, K. D. oth Newport, B. J. oth Ong, R. A. oth Oser, S. oth Rosenberg, L. J oth Enthalten in Physical review / D [S.l.] : Soc., 1970 55(1997), 4, Seite 1714-1731 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:55 year:1997 number:4 pages:1714-1731 extent:18 https://www.tib.eu/de/suchen/id/aps%3A254334c87ed51ffe6f4469eecbaefe4a89af944c Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 55 1997 4 1714-1731 18 |
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(DE-627)NLEJ250061406 (DE-601)aps:254334c87ed51ffe6f4469eecbaefe4a89af944c DE-627 ger DE-627 rakwb High statistics search for ultrahigh energy γ-ray emission from Cygnus X-3 and Hercules X-1 1997 Online-Ressource 18 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We have carried out a high statistics (2×109 events) search for ultrahigh energy γ-ray emission from the x-ray binary sources Cygnus X-3 and Hercules X-1. Using data taken with the CASA-MIA detector over a five year period (1990–1995), we find no evidence for steady emission from either source. The derived 90 % C.L. upper limit to the steady integral flux of γ rays from Cygnus X-3 is Φ(E>115 TeV)<6.3×10-15 photons cm-2 sec-1, and from Hercules X-1 it is Φ(E>115 TeV)<8.5×10-15 photons cm-2 sec-1. These limits are more than two orders of magnitude lower than earlier claimed detections and are better than recent experiments operating in the same energy range. We have also searched for transient emission on time periods of one day and 0.5 h and find no evidence for such emission from either source. The typical daily limit on the integral γ-ray flux from Cygnus X-3 or Hercules X-1 is Φdaily(E>115 TeV)<2.0×10-13 photons cm-2 sec-1. For Cygnus X-3, we see no evidence for emission correlated with the 4.8 h x-ray periodicity or with the occurrence of large radio flares. Unless one postulates that these sources were very active earlier and are now dormant, the limits presented here put into question the earlier results, and highlight the difficulties that possible future experiments will have in detecting γ-ray signals at ultrahigh energies. APS Digital Backfile Archive 1893-2003 Borione, A. oth Chantell, M. C. oth Covault, C. E. oth Cronin, J. W. oth Fick, B. E. oth Fowler, J. W. oth Fortson, L. F. oth Gibbs, K. G. oth Green, K. D. oth Newport, B. J. oth Ong, R. A. oth Oser, S. oth Rosenberg, L. J oth Enthalten in Physical review / D [S.l.] : Soc., 1970 55(1997), 4, Seite 1714-1731 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:55 year:1997 number:4 pages:1714-1731 extent:18 https://www.tib.eu/de/suchen/id/aps%3A254334c87ed51ffe6f4469eecbaefe4a89af944c Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 55 1997 4 1714-1731 18 |
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(DE-627)NLEJ250061406 (DE-601)aps:254334c87ed51ffe6f4469eecbaefe4a89af944c DE-627 ger DE-627 rakwb High statistics search for ultrahigh energy γ-ray emission from Cygnus X-3 and Hercules X-1 1997 Online-Ressource 18 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We have carried out a high statistics (2×109 events) search for ultrahigh energy γ-ray emission from the x-ray binary sources Cygnus X-3 and Hercules X-1. Using data taken with the CASA-MIA detector over a five year period (1990–1995), we find no evidence for steady emission from either source. The derived 90 % C.L. upper limit to the steady integral flux of γ rays from Cygnus X-3 is Φ(E>115 TeV)<6.3×10-15 photons cm-2 sec-1, and from Hercules X-1 it is Φ(E>115 TeV)<8.5×10-15 photons cm-2 sec-1. These limits are more than two orders of magnitude lower than earlier claimed detections and are better than recent experiments operating in the same energy range. We have also searched for transient emission on time periods of one day and 0.5 h and find no evidence for such emission from either source. The typical daily limit on the integral γ-ray flux from Cygnus X-3 or Hercules X-1 is Φdaily(E>115 TeV)<2.0×10-13 photons cm-2 sec-1. For Cygnus X-3, we see no evidence for emission correlated with the 4.8 h x-ray periodicity or with the occurrence of large radio flares. Unless one postulates that these sources were very active earlier and are now dormant, the limits presented here put into question the earlier results, and highlight the difficulties that possible future experiments will have in detecting γ-ray signals at ultrahigh energies. APS Digital Backfile Archive 1893-2003 Borione, A. oth Chantell, M. C. oth Covault, C. E. oth Cronin, J. W. oth Fick, B. E. oth Fowler, J. W. oth Fortson, L. F. oth Gibbs, K. G. oth Green, K. D. oth Newport, B. J. oth Ong, R. A. oth Oser, S. oth Rosenberg, L. J oth Enthalten in Physical review / D [S.l.] : Soc., 1970 55(1997), 4, Seite 1714-1731 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:55 year:1997 number:4 pages:1714-1731 extent:18 https://www.tib.eu/de/suchen/id/aps%3A254334c87ed51ffe6f4469eecbaefe4a89af944c Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 55 1997 4 1714-1731 18 |
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High statistics search for ultrahigh energy γ-ray emission from Cygnus X-3 and Hercules X-1 |
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High statistics search for ultrahigh energy γ-ray emission from Cygnus X-3 and Hercules X-1 |
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High statistics search for ultrahigh energy γ-ray emission from Cygnus X-3 and Hercules X-1 |
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high statistics search for ultrahigh energy γ-ray emission from cygnus x-3 and hercules x-1 |
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High statistics search for ultrahigh energy γ-ray emission from Cygnus X-3 and Hercules X-1 |
| abstract |
We have carried out a high statistics (2×109 events) search for ultrahigh energy γ-ray emission from the x-ray binary sources Cygnus X-3 and Hercules X-1. Using data taken with the CASA-MIA detector over a five year period (1990–1995), we find no evidence for steady emission from either source. The derived 90 % C.L. upper limit to the steady integral flux of γ rays from Cygnus X-3 is Φ(E>115 TeV)<6.3×10-15 photons cm-2 sec-1, and from Hercules X-1 it is Φ(E>115 TeV)<8.5×10-15 photons cm-2 sec-1. These limits are more than two orders of magnitude lower than earlier claimed detections and are better than recent experiments operating in the same energy range. We have also searched for transient emission on time periods of one day and 0.5 h and find no evidence for such emission from either source. The typical daily limit on the integral γ-ray flux from Cygnus X-3 or Hercules X-1 is Φdaily(E>115 TeV)<2.0×10-13 photons cm-2 sec-1. For Cygnus X-3, we see no evidence for emission correlated with the 4.8 h x-ray periodicity or with the occurrence of large radio flares. Unless one postulates that these sources were very active earlier and are now dormant, the limits presented here put into question the earlier results, and highlight the difficulties that possible future experiments will have in detecting γ-ray signals at ultrahigh energies. |
| abstractGer |
We have carried out a high statistics (2×109 events) search for ultrahigh energy γ-ray emission from the x-ray binary sources Cygnus X-3 and Hercules X-1. Using data taken with the CASA-MIA detector over a five year period (1990–1995), we find no evidence for steady emission from either source. The derived 90 % C.L. upper limit to the steady integral flux of γ rays from Cygnus X-3 is Φ(E>115 TeV)<6.3×10-15 photons cm-2 sec-1, and from Hercules X-1 it is Φ(E>115 TeV)<8.5×10-15 photons cm-2 sec-1. These limits are more than two orders of magnitude lower than earlier claimed detections and are better than recent experiments operating in the same energy range. We have also searched for transient emission on time periods of one day and 0.5 h and find no evidence for such emission from either source. The typical daily limit on the integral γ-ray flux from Cygnus X-3 or Hercules X-1 is Φdaily(E>115 TeV)<2.0×10-13 photons cm-2 sec-1. For Cygnus X-3, we see no evidence for emission correlated with the 4.8 h x-ray periodicity or with the occurrence of large radio flares. Unless one postulates that these sources were very active earlier and are now dormant, the limits presented here put into question the earlier results, and highlight the difficulties that possible future experiments will have in detecting γ-ray signals at ultrahigh energies. |
| abstract_unstemmed |
We have carried out a high statistics (2×109 events) search for ultrahigh energy γ-ray emission from the x-ray binary sources Cygnus X-3 and Hercules X-1. Using data taken with the CASA-MIA detector over a five year period (1990–1995), we find no evidence for steady emission from either source. The derived 90 % C.L. upper limit to the steady integral flux of γ rays from Cygnus X-3 is Φ(E>115 TeV)<6.3×10-15 photons cm-2 sec-1, and from Hercules X-1 it is Φ(E>115 TeV)<8.5×10-15 photons cm-2 sec-1. These limits are more than two orders of magnitude lower than earlier claimed detections and are better than recent experiments operating in the same energy range. We have also searched for transient emission on time periods of one day and 0.5 h and find no evidence for such emission from either source. The typical daily limit on the integral γ-ray flux from Cygnus X-3 or Hercules X-1 is Φdaily(E>115 TeV)<2.0×10-13 photons cm-2 sec-1. For Cygnus X-3, we see no evidence for emission correlated with the 4.8 h x-ray periodicity or with the occurrence of large radio flares. Unless one postulates that these sources were very active earlier and are now dormant, the limits presented here put into question the earlier results, and highlight the difficulties that possible future experiments will have in detecting γ-ray signals at ultrahigh energies. |
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High statistics search for ultrahigh energy γ-ray emission from Cygnus X-3 and Hercules X-1 |
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Borione, A. Chantell, M. C. Covault, C. E. Cronin, J. W. Fick, B. E. Fowler, J. W. Fortson, L. F. Gibbs, K. G. Green, K. D. Newport, B. J. Ong, R. A. Oser, S. Rosenberg, L. J |
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Borione, A. Chantell, M. C. Covault, C. E. Cronin, J. W. Fick, B. E. Fowler, J. W. Fortson, L. F. Gibbs, K. G. Green, K. D. Newport, B. J. Ong, R. A. Oser, S. Rosenberg, L. J |
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