The bright super-supersoft souce phase of KT Eri

Details The bright super-supersoft souce phase of KT Eri The bright super-supersoft souce phase of KT Eri

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.2977d&link_type=abstract

Chandra proposal ID #11308336

Computer Science

Scientific paper

Further Chandra LETGS observations will take advantage of the rare 100+ Swift XRT count/s nova, KT Eri, to probe the nature of the explosion through the properties of the expanding enveloped of the SSS. KT Eri is a high galactic latitude (low NH) nova that exploded on 2009 November 14. The SSS phase was detected at 13 count/s in ongoing Swift monitoring on 2010 January 19 (day 65.7), during which the soft X-ray flux with BB kT~20eV varied dramatically by factors of ~20 on a timescale of ~3 hours, similar to the SSS phases of RS Oph and V458 Vul. The Swift count rate had risen steadily to 150 count/s by January 25, accompanied by variability of a factor of 2-3. A 15ks Chandra LETGS observation obtained on January 23-24 showed a highly detailed spectrum with numerous prominent broadened absorption features and a clear P Cygni profile in N VI. Chandra is by far best suited for this very soft, low NH target whose spectrum extends longward of 50A.

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