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

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 <sup>1

1</sup> 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

Abstract

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)

SIMBAD Objects

Contents

• 1. Introduction
• 2. Beppo SAX data
  • 2.1. Observation of June 1998
  • 2.2. Comparison of the 1997 and 1998 observations
• 3. The TeV band
  • 3.1. Predictions of TeV emission in 1ES 1101-232 from phenomenological constraints
  • 3.2. TeV observations
• 4. SED construction and TeV predictions from theoretical models
• 5. Results and conclusions
• Acknowledgements
• References

© European Southern Observatory (ESO) 2000

Online publication: June 5, 2000
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