Swift observations of PSN J20250386-2449133 (Type Ic SN)
ATel #6727; R. Margutti (Harvard University), P. J. Brown (Texas A&M/Mitchell Institute), A. Kamble (Harvard University), Dan Milisavljevic (SAO), Jerod Parrent (Harvard University), A. M. Soderberg (Harvard University)
on 20 Nov 2014; 23:09 UT
Credential Certification: Raffaella Margutti (rmargutti@cfa.harvard.edu)
Subjects: Ultra-Violet, X-ray, Supernovae
PSN J20250386-2449133 (Atel #6659, #6666) has been recently classified as a young Type Ic SN (Atel #6667). Results from the radio follow up of this transient have been reported by Kamble (Atel #6724).
A Swift-ToO was executed to observe the field of PSN J20250386-2449133 starting on November 3rd, 2014 (PI Brown). We do not find evidence for X-ray emission at the location of the SN using the data collected by the Swift XRT in the time period November 3rd-13th. We calculate a 3 sigma upper limit of 1.7d-3 c/s in the 0.3-10 keV energy band (total exposure time of 11 ks). The Galactic neutral hydrogen column density in the direction of PSN J20250386-2449133 is 5.3d20 cm-2 (Kalberla 2005). Assuming a spectral photon index ~2, we infer an absorbed flux limit of 6.2d-14 erg/s/cm2 (0.3-10 keV), corresponding to a luminosity limit of 1.4d40 erg/s at the distance of 40 Mpc.
We also report on Swift/UVOT measurements from the observation beginning 2014-11-13 04:34:27 using the pipeline for the Swift Optical/Ultraviolet Supernova Archive (SOUSA; Brown et al. 2014, Ap&SS, 354, 89). The SN is clearly detected in the optical but only faintly visible in the UV (and will require galaxy templates to measure an accurate flux). We measure v=15.6 +/- 0.1, b=16.2 +/-0.1, u=16.2 +/- 0.1. Further observations are planned.
We thank the Swift team for scheduling these ToO observations.
