Spectral evolution during dipping in X 1624-490 from the BeppoSAX observation

Details Spectral evolution during dipping in X 1624-490 from the BeppoSAX observation Spectral evolution during dipping in X 1624-490 from the BeppoSAX observation

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..599..658h&link_type=abstract

X-RAY ASTRONOMY: Stellar Endpoints,AGN, and the Diffuse X-ray Background. Edited by Nicholas E. White, Giuseppe Malaguti, and G

Astronomy and Astrophysics

Astronomy

X-Ray Binaries, Neutron Stars, Spectroscopic Binaries, Close Binaries, Accretion And Accretion Disks

Scientific paper

We report analysis results for the BeppoSAX observation of the unusual LMXB dipping source X 1624-490 revealing the nature of spectral evolution during dipping. The broad-band spectrum (1-100 keV) is well-fitted by the two-component model consisting of blackbody emission from the neutron star with kT=1.31+/-0.07 keV plus Comptonized emission from an extended ADC with photon index 2.0-0.7+0.5 and cut-off energy ~12 keV. Intensity-selected dip spectra are well described assuming that the emission components are progressively covered during dipping. It now appears that Progressive Covering of this two emission component model can explain all of the dipping LMXB. .

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