Photometric and spectroscopic evolution of the interacting transient AT 2016jbu(Gaia16cfr) Academic Article uri icon


  • Abstract We present the results from a high cadence, multi-wavelength observation campaign of AT2016jbu, (aka Gaia16cfr) an interacting transient. This dataset complements the current literature by adding higher cadence as well as extended coverage of the lightcurve evolution and late-time spectroscopic evolution. Photometric coverage reveals that AT2016jbuunderwent significant photometric variability followed by two luminous events, the latter of which reached an absolute magnitude of MV 18.5mag. This is similar to the transient SN2009ipwhose nature is still debated. Spectra are dominated by narrow emission lines and show a blue continuum during the peak of the second event. AT2016jbushows signatures of a complex, non-homogeneous circumstellar material (CSM). We see slowly evolving asymmetric hydrogen line profiles, with velocities of 500kms1seen in narrow emission features from a slow moving CSM, and up to 10,000kms1seen in broad absorption from some high velocity material. Late-time spectra (+1 year) show a lack of forbidden emission lines expected from a core-collapse supernova and are dominated by strong emission from H, Hei and Caii. Strong asymmetric emission features, a bumpy lightcurve, and continually evolving spectra suggest an inhibit nebular phase. We compare the evolution of H among SN2009ip-like transients and find possible evidence for orientation angle effects. The light-curve evolution of AT2016jbusuggests similar, but not identical, circumstellar environments to other SN2009ip-like transients.

published proceedings


author list (cited authors)

  • Brennan, S. J., Fraser, M., Johansson, J., Pastorello, A., Kotak, R., Stevance, H. F., ... van Soelen, B.

complete list of authors

  • Brennan, SJ||Fraser, M||Johansson, J||Pastorello, A||Kotak, R||Stevance, HF||Chen, T-W||Eldridge, JJ||Bose, S||Brown, PJ||Callis, E||Cartier, R||Dennefeld, M||Dong, Subo||Duffy, P||Elias-Rosa, N||Hosseinzadeh, G||Hsiao, E||Kuncarayakti, H||Martin-Carrillo, A||Monard, B||Nyholm, A||Pignata, G||Sand, D||Shappee, BJ||Smartt, SJ||Tucker, BE||Wyrzykowski, L||Abbot, H||Benetti, S||Bento, J||Blondin, S||Chen, Ping||Delgado, A||Galbany, L||Gromadzki, M||Gutierrez, CP||Hanlon, L||Harrison, DL||Hiramatsu, D||Hodgkin, ST||Holoien, TW-S||Howell, DA||Inserra, C||Kankare, E||Kozlowski, S||Muller-Bravo, TE||Maguire, K||McCully, C||Meintjes, P||Morrell, N||Nicholl, M||O'Neill, D||Pietrukowicz, P||Poleski, R||Prieto, JL||Rau, A||Reichart, DE||Schweyer, T||Shahbandeh, M||Skowron, J||Sollerman, J||Soszynski, I||Stritzinger, MD||Szymanski, M||Tartaglia, L||Udalski, A||Ulaczyk, K||Young, DR||van Leeuwen, M||van Soelen, B

publication date

  • May 2022