Chandra Grating Spectroscopy of 4U 1700-37 in a Flaring State

Astronomy and Astrophysics – Astrophysics

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Scientific paper

Chandra X-ray Observatory grating observations of the supergiant X-ray binary 4U 1700-37 reveal strong, narrow emission lines in the 4-8 Angstrom range. These lines may account for a substantial portion of the "soft X-ray excess" seen in late phases in this source. During the observations, contemporaneous with RXTE and USA observations, 4U 1700-37 displayed rapid flaring. We examine the time variability of both the overall spectrum and the lines.

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