The Chandra spacecraft was launched successfully on July 23,1999.The payload consists of a high resolution X-ray telescope,two imaging detector systems in the focal plane and two transmission gratings.Each one of the two gratings can be put in the X-ray beam behind the telescope.The Low Energy Transmission Grating Spectrometer ( LETGS) will be described and in-flight calibration measurements will be discussed.In addition data from LETG GTO observations taken between the date of abstract submission and the conference date will be presented. We are grateful to many individuals who contributed over the years to build and calibrate the instruments and prepared the data analysis software.These include the hardware teams and their subcontractors in Europe,the project scientst and his team,the Chandra Science Center team and many industrial contracter teams.
American Astronomical Society Meeting Abstracts
- Pub Date:
- December 1999