Type Ic SN2018gep phot. & sp. follow-up Virtual Observatory Resource

Authors
  1. Pritchard T.A.
  2. Bensch K.
  3. Modjaz M.
  4. Williamson M.
  5. Thone C.C.
  6. Vinko J.,Bianco F.B.
  7. Bostroem K.A.
  8. Burke J.
  9. Garcia-Benito R.
  10. Galbany L.,Hiramatsu D.
  11. Howell D.A.
  12. Izzo L.
  13. Kann D.A.
  14. McCully C.
  15. Pellegrino C.,de Ugarte Postigo A.
  16. Valenti S.
  17. Wang X.
  18. Wheeler J.C.
  19. Xiang D.,Sarneczky K.
  20. Bodi A.
  21. Cseh B.
  22. Tarczay-Nehez D.
  23. Kriskovics L.
  24. Ordasi A.,Pal A.
  25. Szakats R.
  26. Vida K.
  27. Published by
    CDS
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 SNIc-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+/-0.5days puts it squarely in the emerging class of Fast Evolving Luminous Transients, or Fast Blue Optical Transients. With a peak absolute magnitude of Mv=-19.53+/-0.23mag 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.

Keywords
  1. infrared-photometry
  2. visible-astronomy
  3. Wide-band photometry
  4. ultraviolet-astronomy
  5. spectroscopy
  6. supernovae
Bibliographic source Bibcode
2021ApJ...915..121P
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/915/121
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/915/121
Document Object Identifer DOI
doi:10.26093/cds/vizier.19150121

Access

IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).

History

2023-01-19T08:50:29Z
Resource record created
2023-01-19T08:50:29Z
Created
2023-03-20T14:15:39Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr