The Broad Band X-ray Telescope (BBXRT)
![artist concept of BBXRT in the Shuttle bay in flight](https://webarchive.library.unt.edu/eot2008/20080916011203im_/http://heasarc.gsfc.nasa.gov/Images/bbxrt/sts-35_flight_small2.gif)
The Broad Band X-ray Telescope (BBXRT) was flown on the space shuttle Columbia (STS-35) as part of the ASTRO-1 payload. It was designed and built at the Laboratory for High Energy Astrophysics at NASA/GSFC.
BBXRT was the first focusing X-ray telescope operating over a broad energy range 0.3-12 keV with a moderate energy resolution (90 eV at 1 keV and 150eV at 6 keV).
Mission Characteristics
![*](https://webarchive.library.unt.edu/eot2008/20080916011203im_/http://heasarc.gsfc.nasa.gov/Images/heasarc/icons/orangeball.gif)
![*](https://webarchive.library.unt.edu/eot2008/20080916011203im_/http://heasarc.gsfc.nasa.gov/Images/heasarc/icons/orangeball.gif)
![*](https://webarchive.library.unt.edu/eot2008/20080916011203im_/http://heasarc.gsfc.nasa.gov/Images/heasarc/icons/orangeball.gif)
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Two Co-Aligned Telescopes each with a segmented Si(Li) solid state
spectrometer (detector A and B) composite of five pixels.
Total FOV 17.4 ´ diameter, Central pixel FOV 4 ´ diameter
Total area 765 cm2 at 1.5 keV, and 300 cm2 at 7 keV
![*](https://webarchive.library.unt.edu/eot2008/20080916011203im_/http://heasarc.gsfc.nasa.gov/Images/heasarc/icons/orangeball.gif)
- Resolved iron K line in the binaries Cen X-3 and Cyg X-2
- Detect evidence of line broadening in NGC 4151
- Study of cooling flow in clusters
![*](https://webarchive.library.unt.edu/eot2008/20080916011203im_/http://heasarc.gsfc.nasa.gov/Images/heasarc/icons/orangeball.gif)
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Last modified: Thursday, 26-Jun-2003 13:48:38 EDT