Update README.md

README.md

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 <h1> XAMI-model: XMM-Newton optical Artefact Mapping for astronomical Instance segmentation </h1>
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-This repository contains the weights of the **[XAMI model](https://github.com/ESA-Datalabs/XAMI-model)**. The model is trained on images from the XAMI dataset (available on Github and HuggingFace). The images are astronomical observations from the Optical Monitor (XMM-OM) onboard the XMM-Newton X-ray mission.
+This repository contains the weights of the **[XAMI model](https://github.com/ESA-Datalabs/XAMI-model)**. The model is trained on images from the XAMI dataset (available on Github and HuggingFace). The images are astronomical observations from the Optical Monitor (XMM-OM) onboard the XMM-Newton X-ray mission of the European Space Agency (ESA).
 
 Information about the XMM-OM can be found here: