@article{07d4166f39af4e08aa90e62439081e39,
title = "On the progenitor of the type IIP SN 2013ej in M74",
abstract = "We use natural seeing imaging of SN 2013ej in M74 to identify a progenitor candidate in archival Hubble Space Telescope (HST) + Advanced Camera for Survey images. We find a source coincident with the supernova (SN) in the F814W filter within the total 75 mas (~3 pc astrometric uncertainty; however, the position of the progenitor candidate in contemporaneous F435W and F555W filters is significantly offset. We conclude that the 'progenitor candidate' is in fact two physically unrelated sources; a blue source which is likely unrelated to the SN, and a red source which we suggest exploded as SN 2013ej. Deep images with the same instrument on board HST taken when the SN has faded (in approximately two year's time) will allow us to accurately characterize the unrelated neighbouring source and hence determine the intrinsic flux of the progenitor in three filters.We suggest that the F814W flux is dominated by the progenitor of SN 2013ej, and assuming a bolometric correction appropriate to an M-type supergiant, we estimate that the mass of the progenitor of SN 2013ej was between 8 and 15.5M⊙.",
author = "Morgan Fraser and Maund, {Justyn R.} and Smartt, {Stephen J.} and Rubina Kotak and Andy Lawrence and Alastair Bruce and Stefano Valenti and Fang Yuan and Stefano Benetti and Ting-Wan Chen and Avishay Gal-Yam and Cosimo Inserra and Young, {David R.}",
note = "European Research Council under the European Union's Seventh Framework Programme (FP7)/ERC [291222]; Royal Society University Research Fellowship; PRIN-INAF; project 'Transient Universe: from ESO Large to PESSTO'; EU/FP7 via ERC [307260]; GIF grant; Kimmel award; NASA [NAS 5-26555]The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013)/ERC Grant agreement no. [291222] (PI: S. J. Smartt). The research of JRM is funded through a Royal Society University Research Fellowship. SB is partially supported by the PRIN-INAF 2011 with the project 'Transient Universe: from ESO Large to PESSTO'. AG acknowledges support by the EU/FP7 via ERC grant no. 307260, a GIF grant, and the Kimmel award.Partially based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Science Institute (STScI). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. Partially based on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), Ministerio da Ciencia, Tecnologia e Inovacao (Brazil) and Ministerio de Ciencia, Tecnologia e Innovacion Productiva (Argentina). This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.",
year = "2014",
month = mar,
doi = "https://doi.org/10.1093/mnrasl/slt179",
language = "الإنجليزيّة",
volume = "439",
pages = "L56--L60",
journal = "Monthly Notices of the Royal Astronomical Society: Letters",
issn = "1745-3925",
publisher = "Oxford University Press",
number = "1",
}