X-ray detection of SN2013ak (PSN J08070669-2803101)

ATel #4944; R. Margutti, A. Soderberg, S. Chakraborti, M. Drout, A. Kamble, D. Milisavljevic, N. Sanders, A. Zauderer (Harvard University)
on 3 Apr 2013; 18:39 UT
Credential Certification: Raffaella Margutti (rmargutti@cfa.harvard.edu)

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SN2013ak is a very nearby type IIb (Atel #4874, Atel #4943) supernova exploded in ESO 430-020 (d~12.7 Mpc via NED). Using 10.3 ks of Swift-XRT observations obtained between March 11th - March 19th we find evidence for significant X-ray emission at the SN position, with count-rate (2.1 +/- 0.5)e-3 cps in the 0.3-10 keV energy band. Correcting for the Galactic neutral hydrogen column density in the direction of the transient (NH= 4.13E+21 cm-2, Kalberla 2005) and assuming a simple power-law spectrum with photon index Gamma=2, the unabsorbed flux is (1.6 +\- 0.4)e-13 erg/s/cm2 corresponding to a luminosity of (3.1 +\- 0.7)e39 erg/s (0.3-10 keV). We confirmed of the detection with Chandra observations on March 27th. Further observations are ongoing. We thank the Swift team for scheduling these ToO observations.