Chandra Observations of A0620-00 and GS2000+25: Two Very Dark Black Holes

Details Chandra Observations of A0620-00 and GS2000+25: Two Very Dark Black Holes Chandra Observations of A0620-00 and GS2000+25: Two Very Dark Black Holes

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.3106g&link_type=abstract

American Astronomical Society, HEAD Meeting #5, #31.06; Bulletin of the American Astronomical Society, Vol. 32, p.1233

Astronomy and Astrophysics

Astronomy

Scientific paper

Chandra observations of two quiecent black-hole x-ray nova (BHXN), A0620-00 and GS2000+25 emphasize the reality of the difference in the x-ray luminosity swings of these systems and their neutron-star containing analogs. For A0620-00, the slope of the x-ray spectrum is much more accurately determined than had previously been possible, and is subtantially harder than the best fit values found with ROSAT. A 20ks Chandra observation of GS2000+25 establishes an upper limit to its x-ray luminosity which is nearly equal to the quiescent luminosity of A0620-00. This work suported by NASA via CXC Contract xxxxx.

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