M. L. Graham

University of Washington

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A. V. Filippenko

University of California, Berkeley

112

D. A. Howell

Las Cumbres Observatory Global Telescope Network

S. Valenti

Medical College of Wisconsin

E. Y. Hsiao

Florida State University

P. Nugent

Lawrence Berkeley National Laboratory

David J. Sand

University of Arizona

D. D. Balam

Dominion Astrophysical Observatory

C. Fremling

California Institute of Technology

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Center for Astrophysics Harvard & Smithsonian

S. B. Cenko

Goddard Space Flight Center

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California Institute of Technology

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University of California, Berkeley

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Centre National de la Recherche Scientifique

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Center for Astrophysics Harvard & Smithsonian

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Max Planck Society

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Large Synoptic Survey Telescope Corporation

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Kavli Institute for Particle Astrophysics and Cosmology

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DISCOVERY, PROGENITOR AND EARLY EVOLUTION OF A STRIPPED ENVELOPE SUPERNOVA iPTF13bvn

The Astrophysical Journal Letters (2013)

Y. Cao M. M. Kasliwal I. Arcavi A. Horesh P. J. Hancock

The intermediate Palomar Transient Factory reports our discovery of a young supernova, iPTF13bvn, in the nearby galaxy, NGC 5806 (22.5 Mpc). Our spectral sequence in the optical and infrared suggests a Type Ib classification. We identify a blue progenitor candidate in deep pre-explosion imaging within a 2σ error circle of 80 mas (8.7 pc). The candidate has an MB luminosity of −5.52 ± 0.39 mag and a B − I color of 0.25 ± 0.25 mag. If confirmed by future observations, this would be the first direct detection for a progenitor of a Type Ib. Fitting a power law to the early light curve, we find an extrapolated explosion date around 0.6 days before our first detection. We see no evidence of shock cooling. The pre-explosion detection limits constrain the radius of the progenitor to be smaller than a few solar radii. iPTF13bvn is also detected in centimeter and millimeter wavelengths. Fitting a synchrotron self-absorption model to our radio data, we find a mass-loading parameter of 1.3×1012 g cm−1. Assuming a wind velocity of 103 km s−1, we derive a progenitor mass-loss rate of 3 × 10−5 M☉ yr−1. Our observations, taken as a whole, are consistent with a Wolf–Rayet progenitor of the supernova iPTF13bvn.

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10.1088/2041-8205/775/1/l7

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DESIRT Transient Discovery Report for 2021-05-20

Transient Name Server Discovery Report (2021)

H. J. Yang X. Chen Lei Hu Jun Tao L. Wang

Transient (computer programming)

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