Chandra Observation of Supernova 2006X in M100
ATel #751; S. Immler, NASA Goddard Space Flight Center, Universities Space Research Association
on 27 Feb 2006; 20:26 UT
Credential Certification: Stefan Immler (immler@milkyway.gsfc.nasa.gov)
Subjects: X-ray, Supernovae
No X-ray source is detected at the position of the Type Ia SN 2006X in M100
(IAUC # 8667 , CBET #393, ATel #726) in a 37.9 ks Chandra ACIS-S X-ray
observation from 2006-02-18.72UT. The 3-sigma upper limit to the (0.2-10
keV band) count rate is 4.5E-04 cts/s, corresponding to an unabsorbed X-ray
flux and luminosity of 4E-15 ergs/cm/cm/s and 1E38 ergs/s, respectively,
for an assumed thermal plasma spectrum with a temperature of 10 keV, an
absorbing foreground column density of 2.39E20 cm**-2 (Dickey & Lockman 1990,
ARAA 28, 215) and a distance of 17.1 Mpc (Freedman et al. 1994, Nature 371,
757). The inferred upper limit to the mass-loss rate of the pre-SN system is
a few x E-6 M_sun/year assuming a shock velocity of 20,000 km/s and a stellar
wind speed of 10 km/s.
