0920022

We propose an additional deep 3.0 Msec exposure of the Large Magellanic Cloud in order 1). to confidently detect and precisely measure the flux from SN 1987A in the direct-escape lines of radioactive Ti-44 (lines at 67.9 78.4 and 511 keV) 2). to study possible hard X-ray emission produced by cosmic-rays accelerated in the ejecta blast wave interacting with the ``inner equatorial ring of circumstellar material of SNR 1987A 3) to search for hard emission from the stellar remnant of this supernova (or significantly improve the existing upper limit). This proposal is a continuation of our proposals approved by TAC in AO-7 (for observations with a 2.0 Msec exposure) and AO-8 (for observations with a 1.5 Msec exposure). If the additional 3.0 Msec observations of the region will be carried out in AO-9 the total exposure for SN1987A will be increased till 9 Msec - by a factor of 2 relatively the presently available one - that will allow INTEGRAL to confidently detect the Ti-44 radioactive lines. In addition to the above (main) purposes of the proposals we will try to detect an electron-positron annihilation line from the dark bulge of the LMC (testing the hypothesis that the line can be produced in the LMC and in the Galactic center by dark matter annihilation). The deep observation of the LMC will also allow ones to monitor X-ray variability of a number of compact X-ray sources present in the field and search for new X-ray transients and weak sources. This observation makes the best use of the unique INTEGRAL capabilities and undoubtedly is the most efficient investment of its precious observing time. [truncated! Please see actual data for full text]