UV-Opt light curves of the type Ic SN 2018gep

DOI

We present detailed observations of ZTF18abukavn (SN2018gep), discovered in high-cadence data from the Zwicky Transient Facility as a rapidly rising (1.4+/-0.1mag/hr) and luminous (M_g,peak_=-20mag) transient. It is spectroscopically classified as a broad-lined stripped-envelope supernova (Ic-BL SN). The high peak luminosity (L_bol>~3x10^44^erg/s), the short rise time (t_rise_=3days in g band), and the blue colors at peak (g-r~-0.4) all resemble the high-redshift Ic-BL iPTF16asu, as well as several other unclassified fast transients. The early discovery of SN2018gep (within an hour of shock breakout) enabled an intensive spectroscopic campaign, including the highest-temperature (T_eff_>~40000K) spectra of a stripped-envelope SN. A retrospective search revealed luminous (M_g_~M_r_~-14mag) emission in the days to weeks before explosion, the first definitive detection of precursor emission for a Ic-BL. We find a limit on the isotropic gamma-ray energy release E_{gamma,iso}<4.9x10^48^erg, a limit on X-ray emission L_X<10^40^erg/s, and a limit on radio emission {nu}L_{nu}_<~10^37^erg/s. Taken together, we find that the early (10days) light curve requires an additional energy source, which could be the radioactive decay of Ni-56.

Identifier
DOI http://doi.org/10.26093/cds/vizier.18870169
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJ/887/169
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/887/169
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/887/169
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJ/887/169
Provenance
Creator Ho A.Y.Q.; Goldstein D.A.; Schulze S.; Khatami D.K.; Perley D.A.; Ergon M.,Gal-Yam A.; Corsi A.; Andreoni I.; Barbarino C.; Bellm E.C.,Blagorodnova N.; Bright J.S.; Burns E.; Cenko S.B.; Cunningham V.; De K.,Dekany R.; Dugas A.; Fender R.P.; Fransson C.; Fremling C.; Goldstein A.,Graham M.J.; Hale D.; Horesh A.; Hung T.; Kasliwal M.M.; Kuin N.P. M,Kulkarni S.R.; Kupfer T.; Lunnan R.; Masci F.J.; Ngeow C.-C.; Nugent P.E.,Ofek E.O.; Patterson M.T.; Petitpas G.; Rusholme B.; Sai H.; Sfaradi I.,Shupe D.L.; Sollerman J.; Soumagnac M.T.; Tachibana Y.; Taddia F.,Walters R.; Wang X.; Yao Y.; Zhang X.
Publisher CDS
Publication Year 2021
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy