Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..540k&link_type=abstract
Chandra Proposal ID #02100340
Astronomy and Astrophysics
Astronomy
Chandra Proposal Id #02100340
Scientific paper
The generation of X-rays in comets is a new puzzling phenomenon. We propose a spectroscopic study of X-rays in comet C/1999 T1 at E>0.15 keV using ACIS-S for 19 ksec. We have obtained the EUVE spectra of comet Hyakutake (that was powerful and exceptionally close) up to 0.15 keV with resolving power of 10 and signal-to-noise ratio of 15. Comets are very extended sources, therefore the resolving powers of ACIS-S and HRC-S/LETG are similar (3.5 and <6 for C/1999 T1)in the range of 0.15-0.85 keV, while the ACIS-S effective area is better by a factor of 30. This proposal is directly related to NASA's programs for both X-ray astronomy and solar system science and is a continuation of our study of X-ray emission from comets which has engendered a broad response in scientific community and public
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