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IGR J13042-1020: a massive black hole in spiral galaxy NGC 4939
IGR J13042-1020: a massive black hole in spiral galaxy NGC 4939
Date: 11 June 2010 Satellite: INTEGRAL Depicts: Swift/XRT and IBIS/ISGRI positions for hard X-ray source in spiral galaxy NGC 4939 Show in archive: true
(Originally published as an INTEGRAL Picture of the Month on the INTEGRAL science operations centre website.)