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Title:
INTEGRAL observation of flaring activity of Mrk 421
Authors:
Lichti, G. G.; Paltani, S.; Mowlavi, M.; Ajello, M.; Collmar, W.; von Kienlin, A.; Beckmann, V.; Boisson, C.; Sol, H.; Buckley, J.; Charlot, P.; Degrange, B.; Djannati-Atai, A.; Punch, M.; Falcone, A.; Finley, J.; Fossati, G.; Henri, G.; Sauge, L.; Katarzynski, K.; Kieda, D.; Lähteenmäki, A.; Tornikoski, M.; Mannheim, K.; Marcowith, A.; Saggione, A.; Sillanpaa, A.; Takalo, L.; Smith, D.; Weekes, T.
Publication:
The Astronomer's Telegram, #848
Publication Date:
06/2006
Origin:
ATEL
Keywords:
X-ray, AGN
Bibliographic Code:
2006ATel..848....1L

Abstract

INTEGRAL observed Mrk 421 nearly continuously from June 14, 2006 07:54:19.0 UT until June 25, 2006 19:54:28 UT (and not July 25 as was erroneously written in ATEL #840). During this time the source was observed to be highly variable in both IBIS/ISGRI and JEM-X. Three flares were observed during this observation, respectively on June 16, 17 and 23. The strongest was the last one (detection significance of 30 sigma in both instruments), with maximal fluxes reaching ~92 mCrab in 3-10 keV, ~120 mCrab in 10-20 keV, ~110 mCrab in 20-40 keV and ~80 mCrab in 40-80 keV.
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