XTE J1739-302: An Unusual New X-ray Transient

Details XTE J1739-302: An Unusual New X-ray Transient XTE J1739-302: An Unusual New X-ray Transient

1998-05-13

arxiv.org/abs/astro-ph/9805178v1

Astronomy and Astrophysics

Astrophysics

11 pages incorporating 6 figures, AAStex; accepted for The Astrophysical Journal, Part 2 (Letters)

Scientific paper

10.1086/311472

A new x-ray transient, designated XTE J1739-302, was discovered with the Proportional Counter Array (PCA) on the Rossi X-ray Timing Explorer (RXTE) in data from 12 August 1997. Although it was the brightest source in the Galactic Center region while active (about 3.0 x 10^-9 ergs/cm2/s from 2 to 25 keV), it was only observed on that one day; it was not detectable nine days earlier or two days later. There is no known counterpart at other wavelengths, and its proximity to the Galactic Center will make such an identification difficult due to source confusion and extinction. The x-ray spectrum and intensity suggest a giant outburst of a Be/neutron star binary, although no pulsations were observed and the outburst was shorter than is usual from these systems.

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