The HEASARC welcomes your participation in a brief survey to capture how users access and utilize HEASARC data, software, and services. The outcome(s) of this survey will be used to guide, prioritize, and plan our activities and development in the coming years. It contains 18 questions, generally takes just a few minutes to complete, and your answers will remain totally anonymous. We thank you in advance for your valuable feedback.
The Neil Gehrels Swift Observatory

XRT Images of Comet Tempel

XRT Image of Comet Tempel - Before Impact XRT Images of Comet Tempel - After Impact

XRT Images of Comet Tempel taken before (left) and after (right) impact. Click on images for a larger view or for have a look at view of them together.