Unveiling A New Class of Fast Transient Binaries

Computer Science

Scientific paper

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Chandra Proposal Id #07400430

Scientific paper

XTE J1739-302, IGR 17544-2619, and IGR J16465-4507 are the first members of a new class of faint binaries with bright outbursts lasting only hours, and blue supergiant companions. No such systems were previously known, and there no model to explain outbursts of this duration. The RXTE PCA has turned up three new faint systems with very short outbursts, and one more candidate appears in the archive from BeppoSAX. Using Chandra to find the companions of these four systems, we will either 1) say for certain that the new class exists, or 2) understand that a wide variety of binaries are capable of hours-scale outbursts. Either would be an important discovery.

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