Simultaneous Chandra/ATCA observation of GRO J1655-40 in quiescence

Details Simultaneous Chandra/ATCA observation of GRO J1655-40 in quiescence Simultaneous Chandra/ATCA observation of GRO J1655-40 in quiescence

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2745g&link_type=abstract

Chandra proposal ID #10408320

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Scientific paper

We have recently been awarded a very deep (12 hr) radio observation of the quiescent X-ray binary GRO J1655-40 with the newly refurbished Australia Telescope Compact Array (ATCA) on June 7. The goal of this observation is to probe jet formation at the lowest possible mass accretion rates. Beside A0620-00, which was observed simultaneously by the VLA and Chandra in 2005 (Gallo et al. 2006, MNRAS, 370, 1351), there is only one other quiescent black-hole system whose properties enable us to probe jet formation at such low accretion rates, and that is GRO J1655-40. As well as anchoring the radio:X-ray correlation at the lowest luminosities, we should be also able to detect the radio spectrum of a truly quiescent source for the first time. In turn, this will allow us to compare the broadband spectral energy distribution of a quiescent stellar mass black hole to that of the quiescent 4E+6 solar mass black hole in the Galactic Center.

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