Detection of a new TeV gamma-ray source of BL Lac object 1ES 1959+650

Details Detection of a new TeV gamma-ray source of BL Lac object 1ES 1959+650 Detection of a new TeV gamma-ray source of BL Lac object 1ES 1959+650

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icrc....3..370n&link_type=abstract

Proceedings of the 26th International Cosmic Ray Conference. August 17-25, 1999. Salt Lake City, Utah, USA. Under the auspices o

Physics

Scientific paper

BL Lac object 1ES 1959+650 with small redshift of z=0.048 has been observed using the Utah Seven Telescope Array detector with 3 m diameter at Dugway, Utah. We have observed 1ES 1959+650 for 56.7 hours in total from May, 1998 until August, 1998. We obtained evidence of VHE gamma-ray emission from 1ES 1959+650. Event excess with a significance of 5.3 for the data from MJD 50956 to MJD 50965 and of 5.0 from MJD 50996 to MJD 51023 from the direction of the object was obtained. Excess of 3.9 was obtained from the analysis of all data taken in 1998. Variability of the VHE gamma-ray emission was seen from the light curve.

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