INTEGRAL and multiwavelength observations of the blazar Mrk 421 during an active phase

E. Bottacini , G. Lichti , P. Charlot (1, 2, 3) , W. Collmar , D. Horan , A. von Kienlin , A. Lähteenmaki , K. Nilsson , D. Petry , A. Sillanpää , M. Tornikoski , T. Weekes

1 LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
2 OASU - Observatoire aquitain des sciences de l'univers
3 L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux

A ToO observation of the TeV-emitting blazar Mrk 421 with INTEGRAL was triggered in June 2006 by an increase of the RXTE count rate to more than 30 milliCrab. The source was then observed with all INTEGRAL instruments with the exception of the spectrometer SPI for a total exposure of 829 ks. During this time several outbursts were observed by IBIS and JEM-X. Multiwavelength observations were immediately triggered and the source was observed at radio, optical and X-ray wavelengths up to TeV energies. The data obtained during these observations are analysed with respect to spectral evolution and correlated variability. Preliminary results of the analysis are presented in this poster.

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Astrophysique [astro-ph]

E. Bottacini, G. Lichti, P. Charlot, W. Collmar, D. Horan, et al.. INTEGRAL and multiwavelength observations of the blazar Mrk 421 during an active phase. First GLAST Symposium, Stanford (USA),, Feb 2007, Stanford, United States. pp.371-372, ⟨10.1063/1.2757357⟩. ⟨hal-00132461⟩