Earlier activity from XTE J1739-302/IGR J17391-3021 detected by INTEGRAL

Jérôme Chenevez, V. Beckmann, E. Kuulkers, A. Bird, Søren Kristian Brandt, T. J.-L. Courvoisier, A. Domingo, K. Ebisawa, P. Jonke, P. Kretschmar, C. Markwardt, T. Oosterbroek, A. Paizis, D. Risquez, C. Sanchez-Fernandez, S. Shaw

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The recently reported outburst from the supergiant fast X-ray transient XTE J1739-302/IGR J17391-3021 (ATEL #1466) began already about five hours earlier than the Swift/BAT trigger on 2008-04-08. The INTEGRAL/JEM-X monitor detected a flare starting at 16:18 (UTC) on the same day during recent Galactic Bulge nitoring observations (see ATEL #1385 and #1468). The flux averaged over the ~2 hour flare reached 42+/-8 mCrab (3-10 keV) and 80+/-15 mCrab (10-25 keV) with upper limits previous to the flare of 4 mCrab (3-10) keV and 8 mCrab (10-25 keV).
Original languageEnglish
JournalThe Astronomer's telegram
Pages (from-to)1471
Publication statusPublished - 2008

Cite this

Chenevez, J., Beckmann, V., Kuulkers, E., Bird, A., Brandt, S. K., Courvoisier, T. J-L., Domingo, A., Ebisawa, K., Jonke, P., Kretschmar, P., Markwardt, C., Oosterbroek, T., Paizis, A., Risquez, D., Sanchez-Fernandez, C., & Shaw, S. (2008). Earlier activity from XTE J1739-302/IGR J17391-3021 detected by INTEGRAL. The Astronomer's telegram, 1471.