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
    The Gravitational-wave Optical Transient Observer (GOTO)
    The Gravitational-wave Optical Transient Observer (GOTO) is a project dedicated to identifying optical counterparts to gravitational-wave detections using a network of dedicated, wide-field telescopes. After almost a decade of design, construction, and commissioning work, the GOTO network is now fully operational with two antipodal sites: La Palma
    Dyer, Martin J. et al.

    Advertised on:

    8
    2024
    Bibcode
    2024SPIE13094E..1XD
    Citations
    1
  • Non-refereed
    Innovative solution for upgrading commercial bearings for use in cryogenic instruments
    Infrared instruments for astronomy require many bearings for motion that must move in cryogenic conditions. There are poor and expensive options for this, and the companies with qualified bearings only supply after a long time. To attend these constrains, the Instituto de Astrofísica de Canarias (IAC) started to develop a procedure to upgrade
    Luján, Alejandro et al.

    Advertised on:

    8
    2024
    Bibcode
    2024SPIE13100E..73L
    Citations
    0
  • Non-refereed
    NIRPS first light and early science: breaking the 1 m/s RV precision barrier at infrared wavelengths
    The Near-InfraRed Planet Searcher or NIRPS is a precision radial velocity spectrograph developed through collaborative efforts among laboratories in Switzerland, Canada, Brazil, France, Portugal and Spain. NIRPS extends to the 0.98-1.8 μm domain of the pioneering HARPS instrument at the La Silla 3.6-m telescope in Chile and it has achieved
    Artigau, Étienne et al.

    Advertised on:

    7
    2024
    Bibcode
    2024SPIE13096E..0CA
    Citations
    0