Observations of the BL Lac object, 1H1426+428 at TeV gamma-ray energies

Details Observations of the BL Lac object, 1H1426+428 at TeV gamma-ray energies Observations of the BL Lac object, 1H1426+428 at TeV gamma-ray energies

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..587..324h&link_type=abstract

GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP Conference Proceedings, Volume 587, pp. 324-328 (2001).

Astronomy and Astrophysics

Astrophysics

7

Active And Peculiar Galaxies And Related Systems, Gamma-Ray Sources, Gamma-Ray Bursts

Scientific paper

TeV gamma-ray observations are reported of 1H1426+428 (1H1426), an X-ray selected BL Lacertae object at a redshift of 0.129. The X-ray spectrum appears to peak near 100 keV; if this is the peak of the synchrotron emission, then this AGN is a prime candidate for TeV gamma-ray emission assuming a Compton-synchrotron model. During the 1999, 2000 and 2001 observing seasons, the source has been intensively studied with the Whipple 10m imaging atmospheric Čerenkov telescope; these observations, together with the indications from earlier observations confirm this hypothesis. The average signal was at the 4.2σ level during the 2000 observing season, while the average signal recorded during 2001 was at the 4.9 σ level. .

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