An updated search of steady TeV γ-ray point sources in northern hemisphere using the Tibet air shower array

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WANG Yue, BI Xiao-Jun, CUI Shu-Wang and DING Lin-Kai. An updated search of steady TeV γ-ray point sources in northern hemisphere using the Tibet air shower array[J]. Chinese Physics C, 2008, 32(11): 868-872. doi: 10.1088/1674-1137/32/11/004
WANG Yue, BI Xiao-Jun, CUI Shu-Wang and DING Lin-Kai. An updated search of steady TeV γ-ray point sources in northern hemisphere using the Tibet air shower array[J]. Chinese Physics C, 2008, 32(11): 868-872.  doi: 10.1088/1674-1137/32/11/004 shu
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Received: 2008-01-18
Revised: 2008-04-09
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An updated search of steady TeV γ-ray point sources in northern hemisphere using the Tibet air shower array

    Corresponding author: WANG Yue,

Abstract: 

Using the data taken from Tibet II High Density (HD) Array (1997 February—1999 September) and Tibet-III array (1999 November—2005 November), our previous northern sky survey for TeV γ-ray point sources has now been updated by a factor of 2.8 improved statistics. From 0.0° to 60.0° in declination (Dec) range, no new TeV γ-ray point sources with sufficiently high significance were identified while the well-known Crab Nebula and Mrk421 remain to be the brightest TeV γ-ray sources within the field of view of the Tibet air shower array. Based on the currently available data and at the 90% confidence level (C.L.), the flux upper limits for different power law index assumption are re-derived, which are approximately improved by 1.7 times as compared with our previous reported limits.

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