The Large Observatory for X-ray Timing (LOFT): An ESA M-class Mission Concept

Details The Large Observatory for X-ray Timing (LOFT): An ESA M-class Mission Concept The Large Observatory for X-ray Timing (LOFT): An ESA M-class Mission Concept

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924906r&link_type=abstract

American Astronomical Society, AAS Meeting #219, #249.06

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High-time-resolution X-ray observations of compact objects provide direct access to strong-field gravity, to the equation of state of ultradense matter and to black hole masses and spins. RXTE spectacularly demonstrated the promise of X-ray timing by revealing an extraordinary range of previously unknown variability phenomena from neutron stars and black holes. However, redeeming that promise and exploiting these phenomena to answer fundamental astrophysical questions will require a larger-area follow-on mission. Technological advances, such as large-area monolithic silicon drift detectors, have made it feasible to attain an order of magnitude or more increase in effective area that is still compatible with a medium class launch vehicle. LOFT is an ESA Cosmic Vision M-class mission concept that is undergoing an assessment phase study. It is one of 4 concepts in consideration for the M3 launch slot, estimated for 2022. The LOFT Large Area Detector (LAD) will achieve an effective area of 12 m2 in the 2-30 keV band (compared to 0.6 m2 for the RXTE PCA). A Wide Field Monitor (WFM) will provide context and triggering information, which is crucial for optimizing the observing plan of the LAD. We will describe the LOFT mission and instruments and present some options for NASA-funded US contributions that are currently under consideration.

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