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Detection of sub-100 GeV gamma-ray pulsations from PSR B1706-44 with H.E.S.S

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arxiv 1908.06464 v3 pith:ZVYNFYNC submitted 2019-08-18 astro-ph.HE

Marion Spir-Jacob , Arache Djannati-Ataï , Lars Mohrmann , Gianluca Giavitto , Bruno Khélifi , Bronis{l}aw Rudak , Christo Venter , Roberta Zanin (for the H.E.S.S. collaboration) This is my paper · ORCID
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keywords b1706-44pulsationsdetectionrangespectrumsub-100abovearray
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We report on the detection of pulsations from PSR B1706-44 based on 28.3 hours of observations with the H.E.S.S. II array with CT5 in monoscopic mode. The lightcurve is similar to that obtained with the Fermi-LAT above 15 GeV and the pulsations exhibit a steep spectrum with index ~ -3.8 in the sub 20 GeV to sub-100 GeV energy range. While a significant signal of ~ 1000 events is detected at energies ~ 70 GeV, it is not possible to either confirm or rule out a power-law behaviour of PSR B1706-44 spectrum in this range.

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