There are only 90 days left until the Mar 20 deadline for Chandra proposals.

All field names link to the RPS help file for Chandra.

Targets are unnecessary for Archive/Theory proposals. Targets will not be processed for these proposals.

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Cover Page : Help

Please select an institute from the Institute List, then copy and paste the institute to the Institute field. If your institute is not on the list, just type it in the Institute field.

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Optional. The Joint Proposal section should ONLY be filled out if this is a joint proposal which also requests time on one/more of the facilities listed below. If you are requesting Joint time through the Chandra Review, please enter your joint proposal parameters:

HST Orbits		Instruments	ACS/WFC ACS/HRC ACS/SBC FGS NICMOS WFPC2
XMM Exposure time(ksec)
RXTE Exposure time(ksec)
NOAO Nights		Instruments:
NRAO Hours		Telescopes	GBT VLA VLBA

Proposal Title
Abstract
We propose to obtain 5 observations of a BH SXT as it returns to quiescence, for each of the observations we also request a nearly simultaneous VLA radio observation. Using these observations we can test whether the empirical relation between the radio and X-ray flux found over 4 decades in X-ray flux in low/hard state BH SXTs extends to X-ray flux levels a factor of 600 lower. If this relation holds this may explain the fact that the BH SXTs in quiescence are fainter in X-rays than NS SXTs without the need of a BH event-horizon. Furthermore, we will obtain high quality spectra of a BH SXT at scarcely studied luminosity intervals, allowing us to determine whether the evolution of the powerlaw spectral index is smooth or abrupt.

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