An absorption event in 4U/MXB 1820 - 30

Details An absorption event in 4U/MXB 1820 - 30 An absorption event in 4U/MXB 1820 - 30

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...298..581c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 298, Nov. 15, 1985, p. 581-584.

Astronomy and Astrophysics

Astrophysics

2

Accretion Disks, Globular Clusters, Neutron Stars, X Ray Absorption, X Ray Binaries, Astronomical Models, Light Curve, Stellar Spectra

Scientific paper

A search of the HEAO A-2 low-energy detector data base for absorption-like events from X-ray bulge sources and bursters has been performed. Only one event was found, from the burster 4U 1820 - 30, which is located in the globular cluster NGC 6624. Spectral analysis indicates an increase in equivalent column density accompanied by a decrease in the overall intensity. This is similar to previous spectral results for 4U 1915 - 05 and MXB 1659 - 29. The low-mass binary model is discussed in the context of these new observations.

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