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Astron. Astrophys. 357, 429-436 (2000)

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X-ray variability and prediction of TeV emission in the HBL 1ES 1101-232

A. Wolter 1, F. Tavecchio 1, A. Caccianiga 2, G. Ghisellini 1 and G. Tagliaferri 1

1 Osservatorio Astronomico di Brera, Via Brera 28, 20121 Milano, Italy
2 Observatorio Astronomico de Lisboa, Tapada da Ajuda, 1300 Lisboa, Portugal

Received 14 October 1999 / Accepted 11 February 2000


1ES 1101-232 is a bright BL Lac of the High frequency peak class. We present here the results of two Beppo SAX observations in which the source has shown a variation of about 30% in flux with a corresponding spectral variability. We interpret the overall spectral energy distribution in terms of an homogeneous SSC model and, by using also the TeV upper limit from a short Mark 6 pointing, derive constraints on the physical parameters of the source, in particular on the magnetic field strength. The overall Spectral Energy Distribution makes 1ES 1101-232 a very promising candidate for TeV detection.

Key words: galaxies: BL Lacertae objects: general – galaxies: BL Lacertae objects: individual: 1ES 1101-232 – X-rays: galaxies

Send offprint requests to: A. Wolter, (anna@brera.mi.astro.it)

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© European Southern Observatory (ESO) 2000

Online publication: June 5, 2000