Statistics – Applications
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.4006c&link_type=abstract
American Astronomical Society, HEAD meeting #11, #40.06; Bulletin of the American Astronomical Society, Vol. 41, p.721
Statistics
Applications
Scientific paper
AXTAR is a NASA MIDEX mission concept for X-ray timing of compact objects that combines very large collecting area, broadband spectral coverage, high time resolution, highly flexible scheduling, and an ability to respond promptly to time-critical targets of opportunity. It is optimized for submillisecond timing of bright Galactic X-ray sources in order to study phenomena at the natural time scales of neutron star surfaces and black hole event horizons, thus probing the physics of ultradense matter, strongly curved spacetimes, and intense magnetic fields. AXTAR's main instrument is a collimated, thick Si pixel detector with 2-50 keV coverage and over 3 square meters effective area. For timing observations of accreting neutron stars and black holes, AXTAR provides at least a factor of five improvement in sensitivity over RXTE PCA. AXTAR also carries a sensitive sky monitor that acts as a trigger for pointed observations of X-ray transients in addition to providing high duty cycle monitoring of the X-ray sky with 20 times the sensitivity of RXTE ASM. AXTAR builds on detector and electronics technology previously developed for other applications (for sponsors including NASA, DARPA, and DHS) and thus combines technical readiness and well understood cost.
AXTAR Collaboration
Chakrabarty Deepto
Ray Paul Shelton
Strohmayer Tod E.
Wilson-Hodge Colleen Anne
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