Speaker
Description
We present photometric observations of SN2019vxm, a long-lasting, highly luminous Type IIn supernova, including a high-cadence rise captured by TESS. SN2019vxm has a broad range of electromagnetic detections ranging from Swift x-rays and ultraviolet through to near-infrared ground based surveys. By fitting a broken power-law model to the TESS light curve, we constrain the explosion time with an uncertainty of $7.2\;\rm hours$. Additionally, we analyze the spatially and temporally coincident x-ray burst GRB191117A as a likely shock breakout associated with the supernova at the time of the explosion. Our analysis finds a coincidence confidence of $2.5\sigma$ that the two events are correlated. We infer that the progenitor star is likely to be a Blue Supergiant or a Luminous Blue Variable, based on the x-ray properties and the model-fitting to our extensive multi-band photometry.
