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Superluminous X-rays from a superluminous supernova

The discovery of a population of superluminous supernovae (SLSNe), with peak luminosities a factor of ~100 brighter than normal SNe (typically SLSNe have M_V <-21), has shown an unexpected diversity in core-collapse supernova properties.…

High Energy Astrophysical Phenomena · Physics 2015-06-15 A. J. Levan , A. M. Read , B. D. Metzger , P. J. Wheatley , N. R. Tanvir

A puzzle solved after two decades: SN 2002gh among the brightest of superluminous supernovae

We present optical photometry and spectroscopy of the superluminous SN 2002gh from maximum light to $+204$ days, obtained as part of the Carnegie Type II Supernova (CATS) project. SN 2002gh is among the most luminous discovered supernovae…

High Energy Astrophysical Phenomena · Physics 2022-05-25 Régis Cartier , Mario Hamuy , Carlos Contreras , Joseph P. Anderson , Mark M. Phillips , Nidia Morrell , Maximilian D. Stritzinger , Emilio D. Hueichapan , Alejandro Clocchiatti , Miguel Roth , Joanna Thomas-Osip , Luis E. González

SN 2020acat: A purr-fect example of a fast rising Type IIb Supernova

The Ultra-Violet (UV) and Near Infrared (NIR) photometric and optical spectroscopic observations of SN 2020acat covering $\sim \! \! 250$ days after explosion are presented here. Using the fast rising photometric observations, spanning from…

High Energy Astrophysical Phenomena · Physics 2022-01-19 K. Medler , P. A. Mazzali , J. Teffs , C. Ashall , J. P. Anderson , I. Arcavi , S. Benetti , K. A. Bostroem , J. Burke , Y. -Z. Cai , P. Charalampopoulos , N. Elias-Rosa , M. Ergon , L. Galbany , M. Gromadzki , D. Hiramatsu , D. A. Howell , C. Inserra , P. Lundqvist , C. McCully , T. Müller-Bravo , M. Newsome , M. Nicholl , E. Padilla Gonzalez , E. Paraskeva , A. Pastorello , C. Pellegrino , P. J. Pessi , A. Requitti , T. M. Reynolds , R. Roy , G. Terreran , L. Tomasella , D. R. Young

Subaru and Keck Observations of the Peculiar Type Ia Supernova 2006gz at Late Phases

Recently, a few peculiar Type Ia supernovae (SNe) that show exceptionally large peak luminosity have been discovered. Their luminosity requires more than 1 Msun of 56Ni ejected during the explosion, suggesting that they might have…

Astrophysics · Physics 2011-02-11 Keiichi Maeda , Koji Kawabata , Weidong Li , Masaomi Tanaka , Paolo A. Mazzali , Takashi Hattori , Ken'ichi Nomoto , Alex V. Filippenko

Slowly fading super-luminous supernovae that are not pair-instability explosions

Super-luminous supernovae that radiate more than 10^44 ergs per second at their peak luminosity have recently been discovered in faint galaxies at redshifts of 0.1-4. Some evolve slowly, resembling models of 'pair-instability' supernovae.…

Cosmology and Nongalactic Astrophysics · Physics 2016-10-12 M. Nicholl , S. J. Smartt , A. Jerkstrand , C. Inserra , M. McCrum , R. Kotak , M. Fraser , D. Wright , T. -W. Chen , K. Smith , D. R. Young , S. A. Sim , S. Valenti , D. A. Howell , F. Bresolin , R. P. Kudritzki , J. L. Tonry , M. E. Huber , A. Rest , A. Pastorello , L. Tomasella , E. Cappellaro , S. Benetti , S. Mattila , E. Kankare , T. Kangas , G. Leloudas , J. Sollerman , F. Taddia , E. Berger , R. Chornock , G. Narayan , C. W. Stubbs , R. J. Foley , R. Lunnan , A. Soderberg , N. Sanders , D. Milisavljevic , R. Margutti , R. P. Kirshner , N. Elias-Rosa , A. Morales-Garoffolo , S. Taubenberger , M. T. Botticella , S. Gezari , Y. Urata , S. Rodney , A. G. Riess , D. Scolnic , W. M. Wood-Vasey , W. S. Burgett , K. Chambers , H. A. Flewelling , E. A. Magnier , N. Kaiser , N. Metcalfe , J. Morgan , P. A. Price , W. Sweeney , C. Waters

Parameters of the type-IIP supernova SN 2012aw

We present the results the photometric observations of the Type IIP supernova SN 2012aw obtained for the time interval from 7 till 371 days after the explosion. Using the previously published values of the photospheric velocities we've…

High Energy Astrophysical Phenomena · Physics 2021-04-28 A. A. Nikiforova , P. V. Baklanov , S. I. Blinnikov , D. A. Blinov , T. S. Grishina , Yu. V. Troitskaya , D. A. Morozova , E. N. Kopatskaya , E. G. Larionova , I. S. Troitsky

The Superluminous Transient ASASSN-15lh as a Tidal Disruption Event from a Kerr Black Hole

When a star passes within the tidal radius of a supermassive black hole, it will be torn apart. For a star with the mass of the Sun ($M_\odot$) and a non-spinning black hole with a mass $<10^8 M_\odot$, the tidal radius lies outside the…

High Energy Astrophysical Phenomena · Physics 2016-12-13 G. Leloudas , M. Fraser , N. C. Stone , S. van Velzen , P. G. Jonker , I. Arcavi , C. Fremling , J. R. Maund , S. J. Smartt , T. Kruhler , J. C. A. Miller-Jones , P. M. Vreeswijk , A. Gal-Yam , P. A. Mazzali , A. De Cia , D. A. Howell , C. Inserra , F. Patat , A. de Ugarte Postigo , O. Yaron , C. Ashall , I. Bar , H. Campbell , T. -W. Chen , M. Childress , N. Elias-Rosa , J. Harmanen , G. Hosseinzadeh , J. Johansson , T. Kangas , E. Kankare , S. Kim , H. Kuncarayakti , J. Lyman , M. R. Magee , K. Maguire , D. Malesani , S. Mattila , C. V. McCully , M. Nicholl , S. Prentice , C. Romero-Canizales , S. Schulze , K. W. Smith , J. Sollerman , M. Sullivan , B. E. Tucker , S. Valenti , J. C. Wheeler , D. R. Young

Rapidly Decaying Supernova 2010X: A Candidate ".Ia" Explosion

We present the discovery, photometric and spectroscopic follow-up observations of SN 2010X (PTF 10bhp). This supernova decays exponentially with tau_d=5 days, and rivals the current recordholder in speed, SN 2002bj. SN 2010X peaks at…

High Energy Astrophysical Phenomena · Physics 2015-05-19 Mansi M. Kasliwal , S. R. Kulkarni , Avishay Gal-Yam , Ofer Yaron , Robert M. Quimby , Eran O. Ofek , Peter Nugent , Dovi Poznanski , Janet Jacobsen , Assaf Sternberg , Iair Arcavi , D. Andrew Howell , Mark Sullivan , Douglas J Rich , Paul F Burke , Joseph Brimacombe MB ChB FRCA MD , Dan Milisavljevic , Robert Fesen , Lars Bildsten , Ken Shen , S. Bradley Cenko , Joshua S. Bloom , Eric Hsiao , Nicholas M. Law , Neil Gehrels , Stefan Immler , Richard Dekany , Gustavo Rahmer , David Hale , Roger Smith , Jeff Zolkower , Viswa Velur , Richard Walters , John Henning , Kahnh Bui , Dan McKenna

PS1-10afx at z=1.388: Pan-STARRS1 Discovery of a New Type of Superluminous Supernova

We present the Pan-STARRS1 discovery of PS1-10afx, a unique hydrogen-deficient superluminous supernova (SLSN) at z=1.388. The light curve peaked at z_P1=21.7 mag, making PS1-10afx comparable to the most luminous known SNe, with M_u = -22.3…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Ryan Chornock , E. Berger , A. Rest , D. Milisavljevic , R. Lunnan , R. J. Foley , A. M. Soderberg , S. J. Smartt , A. J. Burgasser , P. Challis , L. Chomiuk , I. Czekala , M. Drout , W. Fong , M. E. Huber , R. P. Kirshner , C. Leibler , B. McLeod , G. H. Marion , G. Narayan , A. G. Riess , K. C. Roth , N. E. Sanders , D. Scolnic , K. Smith , C. W. Stubbs , J. L. Tonry , S. Valenti , W. S. Burgett , K. C. Chambers , K. W. Hodapp , N. Kaiser , R. -P. Kudritzki , E. A. Magnier , P. A. Price

On the maximum luminosities of normal stripped-envelope supernovae -- brighter than explosion models allow

Stripped-envelope supernovae (SE SNe) of Type Ib and Type Ic are thought to result from explosions of massive stars having lost their outer envelopes. The favoured explosion mechanism is by core-collapse, with the shock later revived by…

Solar and Stellar Astrophysics · Physics 2022-01-12 J. Sollerman , S. Yang , D. Perley , S. Schulze , C. Fremling , M. Kasliwal , K. Shin , B. Racine

Super Luminous Ic Supernovae: catching a magnetar by the tail

We report extensive observational data for five of the lowest redshift Super-Luminous Type Ic Supernovae (SL-SNe Ic) discovered to date, namely PTF10hgi, SN2011ke, PTF11rks, SN2011kf and SN2012il. Photometric imaging of the transients at…

High Energy Astrophysical Phenomena · Physics 2015-06-15 C. Inserra , S. J. Smartt , A. Jerkstrand , S. Valenti , M. Fraser , D. Wright , K. Smith , T. -W. Chen , R. Kotak , A. Pastorello , M. Nicholl , F. Bresolin , R. P. Kudritzki , S. Benetti , M. T. Botticella , W. S. Burgett , K. C. Chambers , M. Ergon , H. Flewelling , J. P. U. Fynbo , S. Geier , K. W. Hodapp , D. A. Howell , M. Huber , N. Kaiser , G. Leloudas , L. Magill , E. A. Magnier , M. G. McCrumm , N. Metcalfe , P. A. Price , A. Rest , J. Sollerman , W. Sweeney , F. Taddia , S. Taubenberger , J. L. Tonry , R. J. Wainscoat , C. Waters , D. Young

Pair Instability Supernovae: Light Curves, Spectra, and Shock Breakout

For the initial mass range (140 < M < 260 Msun) stars die in a thermonuclear runaway triggered by the pair-production instability. The supernovae they make can be remarkably energetic (up to ~10^53 ergs) and synthesize considerable amounts…

High Energy Astrophysical Phenomena · Physics 2015-05-27 Daniel Kasen , S. E. Woosley , Alexander Heger

ASASSN-15no: The Supernova that plays hide-and-seek

We report the results of our follow-up campaign of the peculiar supernova ASASSN-15no, based on optical data covering ~300 days of its evolution. Initially the spectra show a pure blackbody continuum. After few days, the HeI 5876 A…

Solar and Stellar Astrophysics · Physics 2018-03-21 S. Benetti , L. Zampieri , A. Pastorello , E. Cappellaro , M. L. Pumo , N. Elias-Rosa , P. Ochner , G. Terreran , L. Tomasella , S. Taubenberger , M. Turatto , A. Morales-Garoffolo , A. Harutyunyan , L. Tartaglia

Light Curve Modeling of Superluminous Supernova 2006gy: Collision between Supernova Ejecta and Dense Circumstellar Medium

We show model light curves of superluminous supernova 2006gy on the assumption that the supernova is powered by the collision of supernova ejecta and its dense circumstellar medium. The initial conditions are constructed based on the shock…

High Energy Astrophysical Phenomena · Physics 2013-01-04 Takashi J. Moriya , Sergei I. Blinnikov , Nozomu Tominaga , Naoki Yoshida , Masaomi Tanaka , Keiichi Maeda , Ken'ichi Nomoto

SN 2020ank: a bright and fast-evolving H-deficient superluminous supernova

We investigate the observational properties of a hydrogen-deficient superluminous supernova (SLSN) SN 2020ank (at z = 0.2485), with the help of early phase observations carried out between $-$21 and +52 d since $g$-band maximum.…

High Energy Astrophysical Phenomena · Physics 2021-01-27 Amit Kumar , Brajesh Kumar , S. B. Pandey , D. K. Sahu , Avinash Singh , G. C. Anupama , Amar Aryan , Rahul Gupta , Anirban Dutta , Kuntal Misra

SN 2015bf: a fast declining type II supernova with flash-ionised signatures

We present optical and ultraviolet photometry, as well as optical spectra, for the type II supernova (SN) 2015bf. Our observations cover the phases from $\sim 2$ to $\sim 200$ d after explosion. The first spectrum is characterised by a blue…

High Energy Astrophysical Phenomena · Physics 2021-06-09 Han Lin , Xiaofeng Wang , Jujia Zhang , Weili Lin , Jun Mo , Alexei V. Filippenko , WeiKang Zheng , Peter J. Brown , Danfeng Xiang , Fang Huang , Yongzhi Cai , Tianmeng Zhang , Xue Li , Liming Rui , Xinghan Zhang , Hanna Sai , Xulin Zhao , Melissa L. Graham , I. Shivvers , G. Halevi , H. Yuk , Thomas G. Brink

Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the $Kepler$ 2 Observations

Supernova (SN) 2018oh (ASASSN-18bt) is the first spectroscopically-confirmed type Ia supernova (SN Ia) observed in the $Kepler$ field. The $Kepler$ data revealed an excess emission in its early light curve, allowing to place interesting…

Solar and Stellar Astrophysics · Physics 2019-01-09 W. Li , X. Wang , J. Vinkó , J. Mo , G. Hosseinzadeh , D. J. Sand , J. Zhang , H. Lin , T. Zhang , L. Wang , J. Zhang , Z. Chen , D. Xiang , L. Rui , F. Huang , X. Li , X. Zhang , L. Li , E. Baron , J. M. Derkacy , X. Zhao , H. Sai , K. Zhang , L. Wang , D. A. Howell , C. McCully , I. Arcavi , S. Valenti , D. Hiramatsu , J. Burke , A. Rest , P. Garnavich , B. E. Tucker , G. Narayan , E. Shaya , S. Margheim , A. Zenteno , A. Villar , G. Dimitriadis , R. J. Foley , Y. -C. Pan , D. A. Coulter , O. D. Fox , S. W. Jha , D. O. Jones , D. N. Kasen , C. D. Kilpatrick , A. L. Piro , A. G. Riess , C. Rojas-Bravo , B. J. Shappee , T. W. -S. Holoien , K. Z. Stanek , M. R. Drout , K. Auchettl , C. S. Kochanek , J. S. Brown , S. Bose , D. Bersier , J. Brimacombe , P. Chen , S. Dong , S. Holmbo , J. A. Muñoz , R. L. Mutel , R. S. Post , J. L. Prieto , J. Shields , D. Tallon , T. A. Thompson , P. J. Vallely , S. Villanueva , S. J. Smartt , K. W. Smith , K. C. Chambers , H. A. Flewelling , M. E. Huber , E. A. Magnier , C. Z. Waters , A. S. B. Schultz , J. Bulger , T. B. Lowe , M. Willman , K. Sárneczky , A. Pál , J. C. Wheeler , A. Bódi , Zs. Bognár , B. Csák , B. Cseh , G. Csörnyei , O. Hanyecz , B. Ignácz , Cs. Kalup , R. Könyves-Tóth , L. Kriskovics , A. Ordasi , I. Rajmon , A. Sódor , R. Szabó , R. Szakáts , G. Zsidi , P. Milne , J. E. Andrews , N. Smith , C. Bilinski , P. J. Brown , J. Nordin , S. C. Williams , L. Galbany , J. Palmerio , I. M. Hook , C. Inserra , K. Maguire , Régis Cartier , A. Razza , C. P. Gutiérrez , J. J. Hermes , J. S. Reding , B. C. Kaiser , J. L. Tonry , A. N. Heinze , L. Denneau , H. Weiland , B. Stalder , G. Barentsen , J. Dotson , T. Barclay , M. Gully-Santiago , C. Hedges , A. M. Cody , S. Howell , J. Coughlin , J. E. Van Cleve , J. Vinícius de Miranda Cardoso , K. A. Larson , K. M. McCalmont-Everton , C. A. Peterson , S. E. Ross , L. H. Reedy , D. Osborne , C. McGinn , L. Kohnert , L. Migliorini , A. Wheaton , B. Spencer , C. Labonde , G. Castillo , G. Beerman , K. Steward , M. Hanley , R. Larsen , R. Gangopadhyay , R. Kloetzel , T. Weschler , V. Nystrom , J. Moffatt , M. Redick , K. Griest , M. Packard , M. Muszynski , J. Kampmeier , R. Bjella , S. Flynn , B. Elsaesser

The Superluminous (Type I) Supernova ASASSN-15lh : A case for a Quark-Nova inside an Oxygen-type Wolf-Rayet supernova remnant

We show that a Quark-Nova (QN; the explosive transition of a neutron star to a quark star) occurring a few days following the supernova explosion of an Oxygen-type Wolf-Rayet (WO) star can account for the intriguing features of ASASSN-15lh,…

High Energy Astrophysical Phenomena · Physics 2016-11-14 Rachid Ouyed , Denis Leahy , Luis Welbanks , Nico Koning

KSP-SN-2016kf: a long-rising H-rich Type II Supernova with unusually high $^{56}$Ni mass discovered in the KMTNet Supernova Program

We present the discovery and the photometric and spectroscopic study of H-rich Type II supernova (SN) KSP-SN-2016kf (SN2017it) observed in the KMTNet Supernova Program in the outskirts of a small irregular galaxy at $z\simeq0.043$ within a…

High Energy Astrophysical Phenomena · Physics 2019-08-14 Niloufar Afsariardchi , Dae-Sik Moon , Maria R. Drout , Santiago González-Gaitán , Yuan Qi Ni , Christopher D. Matzner , Sang Chul Kim , Youngdae Lee , Hong Soo Park , Avishay Gal-Yam , Giuliano Pignata , Bon-Chul Koo , Stuart Ryder , Sang-Mok Cha , Yongseok Lee

Distribution of $^{56}$Ni Yields of Type Ia Supernovae and its Implication for Progenitors

The amount of $^{56}$Ni produced in type Ia supernova (SN Ia) explosion is probably the most important physical parameter underlying the observed correlation of SN Ia luminosities with their light curves. Based on an empirical relation…

Astrophysics · Physics 2009-11-13 Bo Wang , Xiangcun Meng , Xiaofeng Wang , Zhanwen Han