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We study the extended nuclear emission of the starburst galaxy NGC 1365. Aweak obscured AGN and a strong starburst both contribute to the observed X-ray,optical, infrared, and radio emission in the inner 2kpc. The X-ray emission isspatially resolved, allowing comparison with multiwavelength data thathighlights the structures dominating the nuclear region: the AGN, the nuclearspiral, the circumnuclear starburst ring, and nuclear outflow. The ultrasoftX-ray emission below 0.5keV is spatially coincident with the conical outflowtraced by higher excitation optical emission lines like [O III] and [Ne III].The strong starburst concentrated in super-star clusters in a circumnuclearring with radius ~1kpc dominates the 0.5-1.5keV emission and is visible inradio, molecular CO, and infrared maps of the central kiloparsec. The hard(2-10keV) emission is dominated by the obscured AGN, but also contributes tothe emission from relatively old (~7Myr) but still enshrouded in dust andextremely massive (10^7Msun) super-star clusters (Galliano 2008), hidden fromview in the optical and soft X-ray bands. In the Appendix we present the X-rayspectroscopy and photometry of BL Lac MS 0331.3-3629, a high-energy peaked BLLac candidate at z=0.308, serendipitously detected in one Chandra and fiveXMM-Newton observations of NGC1365.

Multiwavelength View of the Inner Spiral of NGC 1365