Verification of the transient in the M31 globular cluster Bol 194 as super-soft X-ray source

Details Verification of the transient in the M31 globular cluster Bol 194 as super-soft X-ray source Verification of the transient in the M31 globular cluster Bol 194 as super-soft X-ray source

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atel.1306....1h&link_type=abstract

The Astronomer's Telegram, #1306

Astronomy and Astrophysics

Astronomy

4

X-Ray, Cataclysmic Variables, Novae, Transients

Scientific paper

Following the discovery of the transient X-ray source in the M31 globular cluster Bol 194 with Chandra HRC-I (Haberl et al. 2007, ATel #1296) we asked for a Swift follow-up target of opportunity observation. During the Swift 7.26 ks exposure (observation with ID 00031027001 starting on 2007-11-24.34) the transient was detected with 40+/-6 cts with the XRT at energies below 750 eV. The temperature of a blackbody fit to the very soft X-ray spectrum can be constrained to 50 eV < kT < 100 eV (90% confidence) with the formal best fit value at 84 eV.

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