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

Bibcode
2000HEAD....5.3106G
Garcia, M. R.; McClintock, J. E.; Murray, S. S.; Narayan, R.
Bibliographical reference

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

Advertised on:
10
2000
Number of authors
4
IAC number of authors
0
Citations
0
Refereed citations
0
Description
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.
Type
Non-refereed

It may interest you

  • Non-refereed
    NEOMIR: ESA's space-based infrared mission for NEO detection and early warning
    The Near-Earth Object Mission in the Infra-Red (NEOMIR) is the first ESA's space-based mission fully dedicated to discovering near-Earth objects (NEOs), with a focus to detect and raise early warning for the smaller objects that are coming from the Sun direction, thus nearly impossible to be detected by ground-based optical survey. NEOMIR is
    Conversi, L. et al.

    Advertised on:

    8
    2024
    Bibcode
    2024SPIE13092E..2HC
    Citations
    0
  • Non-refereed
    Small-ELF Telescope opto-mechanical system: progress on design, manufacturing, and tensegrity prototyping
    Small-ELF (SELF) is a 3.5-meter telescope currently entering the manufacturing phase and will serve as a technology precursor for the much larger telescope named ELF (Exo-Life Finder). The primary objective of the proposed design approach is to to radically improve the system's capabilities for the detection of biomarkers and life in the
    Zhou, Ye et al.

    Advertised on:

    8
    2024
    Bibcode
    2024SPIE13094E..3RZ
    Citations
    0
  • Non-refereed
    Upgrading the polarisation modulation unit of the Gregor Infrared Spectrograph
    The Gregor Infrared Spectrograph (GRIS) is installed at the Gregor telescope at Observatorio del Teide, Spain. The instrument started observations in 2012 and underwent several upgrades in the following years. Currently, it is experiencing the most significant upgrade so far, which includes, among other things, adding two optical channels to
    Quintero Noda, C. et al.

    Advertised on:

    8
    2024
    Bibcode
    2024SPIE13094E..2EQ
    Citations
    0