Landing page for project RSM05

The ATel#12789 (Gezari et al. 2019) reports the transient AT2019ehz discovered by the Zwicky Transient Factory on 23rd April 2019 (g = 19.81 mag, r=20.03 mag), and GAIA on 29th April 2019 (G=18.49 mag) at the center of the galaxy SDSS J140941.88+552928.0 (z=0.12), indicating that the source was brightening. Swift follow-up observations on 17th May 2019 indicate a detection in the UV--X-rays with a blackbody luminosity of 3.e44 erg/s with a peak luminosity close to the Eddington value. Based on the broadband photometry of the host galaxy, a black hole mass of ~1.e6 solar mass is suggested. The source is classified as a tidal disrup ion event (TDE) based on its location at the center of the host galaxy, persistent blue spectrum and spectral lines unique to a TDE, and high blackbody temperature. We request for another immediate C-band observation during the upcoming e-EVN session, also aimed at: 1. Verifying the compactness of the source during the early rising phase of the TDE; and, 2. Verifying the phase-referencing calibrators for future full EVN observations.

This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa. The EVN archive itself has the DOI https://doi.org/10.17616/R3Z197