InFOCμS: A Balloon-borne Hard X-ray Imaging Telescope

Details InFOCμS: A Balloon-borne Hard X-ray Imaging Telescope InFOCμS: A Balloon-borne Hard X-ray Imaging Telescope

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21347521k&link_type=abstract

American Astronomical Society, AAS Meeting #213, #475.21; Bulletin of the American Astronomical Society, Vol. 41, p.439

Physics

Optics

Scientific paper

InFOCμS is a new generation balloon-borne hard X-ray telescope with focusing optics and spectroscopy. After several successful flights in recent years it is being refurbished for a 2010 flight from Australia to map the hard X-ray emission from the galactic center region. In this poster, we present the status of the mirror, detectors and attitude control system. The grazing incidence optics consists of a depth-graded platinum-carbon multilayer mirror with an 8-meter focal length. It has an effective area of 78 cm^2 at 30 keV, an angular resolution of 2.0 arcmin (HPD), and a field of view of 10 arcmin. The detector is a CdZnTe solid-state device capable of imaging spectroscopy. The detector is surrounded by a 3-cm thick CsI anti-coincidence shield to reduce background from particles and photons not incident along the mirror focal direction. The gondola is being reconfigured in a floating ball configuration to improve pointing control and allow the telescope to be pointed vertically. Tracking will be accomplished with a suite of on-axis and off-axis star cameras. The payload will be ready to fly from Alice Springs, Australia, in Spring 2010. In this flight, InFOCμS will have the angular resolution and sensitivity to determine whether Sgr A* is the source of the hard X-rays detected by Swift/BAT and INTEGRAL and determine if there are other nearby hard X-ray sources.

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