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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 (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: --------------------------------------------------------------- RA (2000) DE Designation(s) --------------------------------------------------------------- 01 14 00.81 -77 06 16.5 OGLE-2014-SN-131 = OGLE 2014-SN-131 --------------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file ogle.dat 46 46 *VI Photometry from OGLE telescope grond.dat 25 42 *grizJHK photometry from GROND telescope
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.
Byte-by-byte Description of file: ogle.dat
Bytes Format Units Label Explanations
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
Note (1): Reads '>' if magnitude is 2-sigma upper limit instead of detection.
Byte-by-byte Description of file: grond.dat
Bytes Format Units Label Explanations
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)
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.
Acknowledgements: Emir Karamehmetoglu, emir.k(at)astro.su.se
(End) Emir Karamehmetoglu [Stockholm Univ.], Patricia Vannier [CDS] 28-Mar-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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