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Tips and Tricks in linear imaging polarimetry of extended sources with FORS2 at the VLT
S. González-Gaitán, A. M. Mourão, F. Patat +5
Context: Polarimetry is a very powerful tool to uncover various properties of astronomical objects that remain otherwise hidden in standard imaging or spectroscopic observations. H…
Linear spectropolarimetry of 35 Type Ia Supernovae with VLT/FORS: An analysis of the Si II line polarization
Aleksandar Cikota, Ferdinando Patat, Lifan Wang +9
Spectropolarimetry enables us to measure the geometry and chemical structure of the ejecta in supernova explosions, which is fundamental for the understanding of their explosion me…
The aspherical explosion of the Type IIP SN 2017gmr
T. Nagao, A. Cikota, F. Patat +7
Type IIP supernovae (SNe IIP), which represent the most common class of core-collapse (CC) SNe, show a rapid increase in continuum polarization just after entering the tail phase.…
SN 2017gmr: An energetic Type II-P supernova with asymmetries
Jennifer E. Andrews, D. J. Sand, S. Valenti +77
We present high-cadence ultraviolet (UV), optical, and near-infrared (NIR) data on the luminous Type II-P supernova SN 2017gmr from hours after discovery through the first 180 days…
The Young and Nearby Normal Type Ia Supernova 2018gv: UV-Optical Observations and the Earliest Spectropolarimetry
Yi Yang, Peter A. Hoeflich, Dietrich Baade +25
The non-detection of companion stars in Type Ia supernova (SN) progenitor systems lends support to the notion of double-degenerate (DD) systems and explosions triggered by the merg…
The spectral evolution of AT 2018dyb and the presence of metal lines in tidal disruption events
Giorgos Leloudas, Lixin Dai, Iair Arcavi +29
We present light curves and spectra of the tidal disruption event (TDE) ASASSN-18pg / AT 2018dyb spanning a period of one year. The event shows a plethora of strong emission lines,…