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6 6.0

Interacting supernovae and supernova impostors. LSQ13zm: an outburst heralds the death of a massive star

Jun 29, 2018 06/18

by L. Tartaglia; A. Pastorello; M. Sullivan; C. Baltay; D. Rabinowitz; P. Nugent; A. J. Drake; S. G. Djorgovski; A. Gal-Yam; S. Fabrika; E. A. Barsukova; V. P. Goranskij; A. F. Valeev; T. Fatkhullin; S. Schulze; A. Mehner; F. E. Bauer; S. Taubenberger; J. Nordin; S. Valenti; D. A. Howell; S. Benetti; E. Cappellaro; G. Fasano; N. Elias-Rosa; M. Barbieri; D. Bettoni; A. Harutyunyan; T. Kangas; E. Kankare; J. C. Martin; S. Mattila; A. Morales-Garoffolo; P. Ochner; Umaa D. Rebbapragada; G. Terreran;...

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We report photometric and spectroscopic observations of the optical transient LSQ13zm. Historical data reveal the presence of an eruptive episode (that we label as `2013a') followed by a much brighter outburst (`2013b') three weeks later, that we argue to be the genuine supernova explosion. This sequence of events closely resemble those observed for SN2010mc and (in 2012) SN2009ip. The absolute magnitude reached by LSQ13zm during 2013a ($M_R=-14.87\pm0.25\,\rm{mag}$) is comparable with those of...
Topics: Astrophysics, High Energy Astrophysical Phenomena, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1604.00013

Arxiv.org

16 16

On the diversity of super-luminous supernovae: ejected mass as the dominant factor

Jun 27, 2018 06/18

by M. Nicholl; S. J. Smartt; A. Jerkstrand; C. Inserra; S. A. Sim; T. -W. Chen; S. Benetti; M. Fraser; A. Gal-Yam; E. Kankare; K. Maguire; K. Smith; M. Sullivan; S. Valenti; D. R. Young; C. Baltay; F. E. Bauer; S. Baumont; D. Bersier; M. -T. Botticella; M. Childress; M. Dennefeld; M. Della Valle; N. Elias-Rosa; U. Feindt; L. Galbany; E. Hadjiyska; L. Le Guillou; G. Leloudas; P. Mazzali; R. McKinnon; J. Polshaw; D. Rabinowitz; S. Rostami; R. Scalzo; B. P. Schmidt; S. Schulze; J. Sollerman; F....

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We assemble a sample of 24 hydrogen-poor super-luminous supernovae (SLSNe). Parameterizing the light curve shape through rise and decline timescales shows that the two are highly correlated. Magnetar-powered models can reproduce the correlation, with the diversity in rise and decline rates driven by the diffusion timescale. Circumstellar interaction models can exhibit a similar rise-decline relation, but only for a narrow range of densities, which may be problematic for these models. We find...
Topics: Solar and Stellar Astrophysics, Astrophysics, High Energy Astrophysical Phenomena, Cosmology and...
Source: http://arxiv.org/abs/1503.03310

Arxiv.org

6 6.0

PESSTO : survey description and products from the first data release by the Public ESO Spectroscopic Survey of Transient Objects

Jun 30, 2018 06/18

by S. J. Smartt; S. Valenti; M. Fraser; C. Inserra; D. R. Young; M. Sullivan; A. Pastorello; S. Benetti; A. Gal-Yam; C. Knapic; M. Molinaro; F. Yuan; L. Zampieri; R. Smareglia; K. W. Smith; S. Taubenberger; O. Yaron; J. P. Anderson; C. Ashall; C. Balland; C. Baltay; C. Barbarino; F. E. Bauer; S. Baumont; D. Bersier; N. Blagorodnova; S. Bongard; M. T. Botticella; F. Bufano; M. Bulla; E. Cappellaro; H. Campbell; F. Cellier-Holzem; T. -W. Chen; M. J. Childress; A. Clocchiatti; C. Contreras; M. Dall...

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The Public European Southern Observatory Spectroscopic Survey of Transient Objects (PESSTO) began as a public spectroscopic survey in April 2012. We describe the data reduction strategy and data products which are publicly available through the ESO archive as the Spectroscopic Survey Data Release 1 (SSDR1). PESSTO uses the New Technology Telescope with EFOSC2 and SOFI to provide optical and NIR spectroscopy and imaging. We target supernovae and optical transients brighter than 20.5mag for...
Topics: Instrumentation and Methods for Astrophysics, Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1411.0299

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