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C1XS Catches first glimpse of X-ray from the Moon

23.01.2009
The C1XS X-ray camera, jointly developed by the UK’s STFC Rutherford Appleton Laboratory and the Indian Space Research Organisation (ISRO), has successfully detected its first X-ray signature from the Moon. This is the first step in its mission to reveal the origin and evolution of our Moon by mapping its surface composition.

In orbit around the Moon on the Chandrayaan-1 spacecraft, C1XS detected the X-ray signal from a region near the Apollo landing sites on December 12th 2008 at 02:36 UT. The solar flare that caused the X-ray fluorescence was exceedingly weak, approximately 20 times smaller than the minimum C1XS was designed to detect.

“C1XS has exceeded expectations as to its sensitivity and has proven by its performance that it is the most sensitive X-ray spectrometer of its kind in history,” said Ms. Shyama Narendranath, Instrument Operations Scientist at ISRO.

The X-ray camera collected 3 minutes of data from the Moon just as the flare started and the camera finished its observation. The signal reveals the X-ray fingerprint of a part of the lunar surface. As the mission continues, C1XS will build up a detailed picture of the ingredients that have gone into the Moon – our eighth continent.

Mr Barry Kellett, instrument scientist from STFC’s Space Science and Technology Department said “Despite the small quantity of data, our initial analysis and modelling shows that C1XS has identified the chemistry of this area of the Moon“.

Professor Manuel Grande, Principal Investigator, Aberystwyth University, concluded, “The quality of the flare signal detected from the Moon clearly demonstrates that C1XS is in excellent condition and has survived the passage of Chandrayaan-1 through the Earth’s radiation (or van Allen) belts with very little damage. This is excellent news for the rest of the Chandrayaan-1 mission”.

Professor Richard Holdaway, Director of STFC’s Space Science and Technology Department, said, “We are thrilled that C1XS has started its mission so successfully and is exceeding expectations. This sophisticated instrument will not only help us better understand the origin of the Earth-Moon system but will ensure that the UK plays an important role in this international activity.”

Julia Short | alfa
Further information:
http://www.stfc.ac.uk

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