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No detected X-ray counterpart to type Ia SN PTFkly

ATel #3584; R. Margutti, A. Soderberg (Harvard University)
on 25 Aug 2011; 14:58 UT
Credential Certification: Raffaella Margutti (rmargutti@cfa.harvard.edu)

Subjects: X-ray, Supernovae

Referred to by ATel #: 3590, 3592, 3593, 3602, 3642

A Swift-ToO was executed to observe the field of the newly discovered type Ia SN in M101 (PTFkly, Nugent, Atel # 3581; Li, Atel #3582; Cenko, Atel #3583) starting from 2011-08-24T22:08:48. No X-ray source is detected by Swift-XRT at the optical position of the transient with a 3 sigma upper limit of ~4.d-3 c/s in the 0.3-10 keV energy band (total exposure= 4.5 ks). The Galactic neutral hydrogen column density in the direction of the event is 1.8d20 1/cm2 (Kalberla 2005). Assuming a spectral photon index ~2, this translates into an absorbed flux limit of ~2d-13 erg/s/cm2 and a luminosity of 2.4d39 erg/s at a distance of 7 Mpc. Further Swift observations are planned.