J/A+A/602/A93 SN Type Ibn OGLE-2014-SN-131 lightcurves (Karamehmetoglu+, 2017)
OGLE-2014-SN-131: A long-rising Type Ibn supernova from a massive progenitor.
Karamehmetoglu E., Taddia F., Sollerman J., Wyrzykowski L., Schmidl S.,
Fraser M., Fremling C., Greiner J., Inserra C., Kostrzewa-Rutkowska Z.,
Maguire K., Smartt S., Sullivan M., Young D.R.
<Astron. Astrophys. 602, A93 (2017)>
=2017A&A...602A..93K 2017A&A...602A..93K (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, CCD ; Photometry, VRI ; Photometry, SDSS
Keywords: supernovae: individual: OGLE-2014-SN-131 - supernovae: general
Abstract:
Type Ibn supernovae (SNe Ibn) are thought to be the core-collapse
explosions of massive stars whose ejecta interact with He-rich
circumstellar material (CSM). We report the discovery of a SN Ibn,
with the longest rise-time ever observed, OGLE-2014-SN-131. We discuss
the potential powering mechanisms and the progenitor nature of this
peculiar stripped-envelope (SE), circumstellar-interacting SN. Optical
photometry and spectroscopy were obtained with multiple telescopes
including VLT, NTT, and GROND. We compare light curves and spectra
with those of other known SNe Ibn and Ibc. CSM velocities are derived
from the spectral analysis. The SN light curve is modeled under
different assumptions about its powering mechanism (56Ni decay,
CSM-interaction, magnetar) in order to estimate the SN progenitor
parameters. OGLE-2014-SN-131 spectroscopically resembles SNe Ibn such
as SN 2010al. Its peak luminosity and post-peak colors are also
similar to those of other SNe Ibn. However, it shows an
unprecedentedly long rise-time and a much broader light curve compared
to other SNe Ibn. Its bolometric light curve can be reproduced by
magnetar and CSM-interaction models, but not by a 56Ni-decay powering
model. To explain the unusually long rise-time, the broad light curve,
the light curve decline, and the spectra characterized by narrow
emission lines, we favor a powering mechanism where the SN ejecta are
interacting with a dense CSM. The progenitor of OGLE-2014-SN-131 was
likely a Wolf-Rayet star with a mass greater than that of a typical SN
Ibn progenitor, which expelled the CSM that the SN is interacting
with.
Description:
Photometric dataset of OGLE-2014-SN-131. It includes data from OGLE
and GROND telescopes in VI, and g'r'i'z'JHK bands, respectively, which
are provided in separate tables. VI, JHK magnitudes are in the Vega
system, g'r'i'z' magnitudes are in the AB system.
Objects:
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RA (2000) DE Designation(s)
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01 14 00.81 -77 06 16.5 OGLE-2014-SN-131 = OGLE 2014-SN-131
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ogle.dat 46 46 *VI Photometry from OGLE telescope
grond.dat 25 42 *grizJHK photometry from GROND telescope
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Note on ogle.dat: OGLE = The Optical Gravitational Lensing Experiment at the
1.3m Warsaw University Telescope at Las Campanas Observatory, Chile.
Note on grond.dat: GROND = Gamma-ray Burst Optical/Near-infrared Detector at
the MPG/ESO 2.2m Telescope at La Silla Observatory, Chile.
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Byte-by-byte Description of file: ogle.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d JD-I Julian Date for I-band observation
13 A1 --- l_Imag Limit flag in Imag (1)
14- 18 F5.2 mag Imag Apparent (Vega) magnitude in I-band
20- 23 F4.2 mag e_Imag ? Magnitude error in I-band
25- 35 F11.3 d JD-V ? Julian Date for V-band observation
37- 41 F5.2 mag Vmag ? Apparent (Vega) magnitude in V-band
43- 46 F4.2 mag e_Vmag ? Magnitude error in V-band
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Note (1): Reads '>' if magnitude is 2-sigma upper limit instead of detection.
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Byte-by-byte Description of file: grond.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d JD Julian Date
13 A1 --- l_mag Limit flag on mag (1)
14- 18 F5.2 mag mag Apparent magnitude in Filter
20- 23 F4.2 mag e_mag ? Magnitude error
25 A1 --- Filter [grizJHK] GROND filter (grizJHK) of
observation (2)
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Note (1): Reads '>' if magnitude is 1-sigma upper limit instead of detection.
Note (2): griz filters are GROND g',r',i',z' filters given in the AB system.
JHK bands are given in the Vega system.
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Acknowledgements:
Emir Karamehmetoglu, emir.k(at)astro.su.se
(End) Emir Karamehmetoglu [Stockholm Univ.], Patricia Vannier [CDS] 28-Mar-2017