@misc{10481/70213,
year = {2020},
month = {8},
url = {http://hdl.handle.net/10481/70213},
abstract = {In the last decade a number of rapidly evolving transients have been discovered that are not easily explained by traditional supernova models. We present optical and UV data on one such object, SN 2018gep, that displayed a fast rise with a mostly featureless blue continuum around peak, and evolved to develop broad features typical of an SN Ic-bl while retaining significant amounts of blue flux throughout its observations. This blue excess is most evident in its near-UV flux, which is over 4 mag brighter than other stripped-envelope supernovae, and is still visible in optical g-r colors. Its fast rise time of t (rise,V ) = 5.6 +/- 0.5 days puts it squarely in the emerging class of Fast Evolving Luminous Transients, or Fast Blue Optical Transients. With a peak absolute magnitude of M ( v ) = -19.53 +/- 0.23 mag it is on the extreme end of both the rise time and peak magnitude distribution for SNe Ic-bl. These observations are consistent with a simple SN Ic-bl model that has an additional form of energy injection at early times that drives the observed rapid, blue rise. We show that SN 2018gep and the literature SN iPTF16asu have similar photometric and spectroscopic properties and that they overall share many similarities with both SNe Ic-bl and Fast Evolving Transients. Based on our SN 2018gep host galaxy data we derive a number of properties, and we show that the derived host galaxy properties for both SN 2018gep and iPTF16asu are consistent with the SNe Ic-bl and gamma-ray burst/supernova sample while being on the extreme edge of the observed Fast Evolving Transient sample.},
organization = {W.M. Keck Foundation},
organization = {NASA under the Swift GI grant	1619152},
organization = {Tess GI grant	G03267},
organization = {NYU Center for Cosmology and Particle Physics},
organization = {New York University Research Challenge FundProgram},
organization = {National Science Foundation (NSF) NSF - Office of the Director (OD) AST-1352405
 National Science Foundation (NSF) AST-1911225 AST-1413260},
organization = {Humboldt Faculty Fellowship},
organization = {Center for Computational Astrophysics at the Flatiron institute},
organization = {Spanish Government	BES2014-069767	
RyC-2012-09975	
RyC-2012-09984},
organization = {Juan de la Cierva Incorporacion fellowship	IJCI-2015-26153	
IJCI-2016-30940},
organization = {"Transient Astrophysical Objects" project of the National Research, Development and Innovation Office (NKFIH), Hungary - European Union	GINOP 2.3.2-15-2016-00033},
organization = {National Research, Development & Innovation Office (NRDIO) - Hungary	NKFI-K-131508	
NKFI-KH-130526},
organization = {Hungarian Academy of Sciences	LP2018-7/2019},
organization = {Orszagos Tudomanyos Kutatasi Alapprogramok (OTKA)	119993},
organization = {National Natural Science Foundation of China (NSFC)	12033003	
11633002	
11761141001},
organization = {National Basic Research Program of China	2016YFA0400803},
organization = {Scholar Program of Beijing Academy of Science and Technology	DZ:BS202002},
organization = {European Commission	839090	


PGC2018-095317-BC21},
organization = {Spanish Ministry of Economy and Competitiveness	AYA2016-77846-P},
organization = {State Agency for Research of the Spanish MCIU through the "Center of Excellence Severo Ochoa" award	SEV-2017-0709},
organization = {National Aeronautics & Space Administration (NASA)	80NSSC19k1639},
organization = {19 Washington Square North Award		
AYA 2014-58381-P	
AYA201789384-P	
RTI2018-098104-J-I00	
AYA2017-89384-P},
publisher = {Institute of Physics Publishing},
title = {The Exotic Type Ic Broad-Lined Supernova SN 2018gep: Blurring the Line Between Supernovae and Fast Optical Transients},
doi = {10.3847/1538-4357/ac00bc},
author = {Pritchard, T. A. and Bensch, Katarzyna and Thöne, Christina C. and García Benito, Rubén and Galbany González, Lluis and Kann, D. Alexander and De Ugarte Postigo, Antonio},
}