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Early observations of the nearby type Ia supernova SN 2015F

We present photometry and time-series spectroscopy of the nearby type Ia supernova (SN Ia) SN 2015F over $-16$ days to $+80$ days relative to maximum light, obtained as part of the Public ESO Spectroscopic Survey of Transient Objects…

Solar and Stellar Astrophysics · Physics 2016-12-07 R. Cartier , M. Sullivan , R. Firth , G. Pignata , P. Mazzali , K. Maguire , M. J. Childress , I. Arcavi , C. Ashall , B. Bassett , S. M. Crawford , C. Frohmaier , L. Galbany , A. Gal-Yam , G. Hosseinzadeh , D. A. Howell , C. Inserra , J. Johansson , E. K. Kasai , C. McCully , S. Prajs , S. Prentice , S. Schulze , S. J. Smartt , K. W. Smith , M. Smith , S. Valenti , D. R. Young

Supernova Rates and Luminosity Functions from ASAS-SN I: 2014--2017 Type Ia SNe and Their Subtypes

We present the volumetric rates and luminosity functions (LFs) of Type Ia supernovae (SNe Ia) from the $V$-band All-Sky Automated Survey for Supernovae (ASAS-SN) catalogues spanning discovery dates from UTC 2014-01-26 to UTC 2017-12-29. Our…

High Energy Astrophysical Phenomena · Physics 2024-05-27 D. D. Desai , C. S. Kochanek , B. J. Shappee , T. Jayasinghe , K. Z. Stanek , T. W. -S. Holoien , T. A. Thompson , C. Ashall , J. F. Beacom , A. Do , S. Dong , J. L. Prieto

Spectroscopy of Type Ia Supernovae by the Carnegie Supernova Project

This is the first release of optical spectroscopic data of low-redshift Type Ia supernovae (SNe Ia) by the Carnegie Supernova Project including 604 previously unpublished spectra of 93 SNe Ia. The observations cover a range of phases from…

Cosmology and Nongalactic Astrophysics · Physics 2015-02-05 Gastón Folatelli , Nidia Morrell , Mark M. Phillips , Eric Hsiao , Abdo Campillay , Carlos Contreras , Sergio Castellón , Mario Hamuy , Wojtek Krzeminski , Miguel Roth , Maximilian Stritzinger , Christopher R. Burns , Wendy L. Freedman , Barry F. Madore , David Murphy , S. E. Persson , José L. Prieto , Nicholas B. Suntzeff , Kevin Krisciunas , Joseph P. Anderson , Francisco Förster , José Maza , Giuliano Pignata , P. Andrea Rojas , Luis Boldt , Francisco Salgado , Pamela Wyatt , Felipe Olivares E. , Avishay Gal-Yam , Masao Sako

Early-phase photometry and spectroscopy of transitional Type Ia SN 2012ht: Direct constraint on the rise time

We report photometric and spectroscopic observations of the nearby Type Ia Supernova (SN Ia) 2012ht from $-15.8$ days to $+49.1$ days after $B$-band maximum. The decline rate of the light curve is $\Delta m_{15}$($B$)$=1.39~\pm~0.05$ mag,…

Solar and Stellar Astrophysics · Physics 2015-06-18 Masayuki Yamanaka , Keiichi Maeda , Miho Kawabata , Masaomi Tanaka , Katsutoshi Takaki , Issei Ueno , Kazunari Masumoto , Koji S. Kawabata , Ryosuke Itoh , Yuki Moritani , Hiroshi Akitaya , Akira Arai , Satoshi Honda , Koichi Nishiyama , Fujio Kabashima , Katsura Matsumoto , Daisaku Nogami , Michitoshi Yoshida

ZTF SN Ia DR2: The spectral diversity of Type Ia supernovae in a volume-limited sample

More than 3000 spectroscopically confirmed Type Ia supernovae (SNe Ia) are presented in the Zwicky Transient Facility SN Ia Data Release 2 (ZTF DR2). In this paper, we detail the spectral properties of 482 SNe Ia near maximum light, up to a…

High Energy Astrophysical Phenomena · Physics 2025-08-18 U. Burgaz , K. Maguire , G. Dimitriadis , L. Harvey , R. Senzel , J. Sollerman , J. Nordin , L. Galbany , M. Rigault , M. Smith , A. Goobar , J. Johansson , P. Rosnet , M. Amenouche , M. Deckers , S. Dhawan , M. Ginolin , Y. -L. Kim , A. A. Miller , T. E. Muller-Bravo , P. E. Nugent , J. H. Terwel , R. Dekany , A. Drake , M. J. Graham , S. L. Groom , M. M. Kasliwal , S. R. Kulkarni , K. Nolan , G. Nir , R. L. Riddle , B. Rusholme , Y. Sharma

A luminous stellar outburst during a long-lasting eruptive phase first, and then SN IIn 2018cnf

We present the results of the monitoring campaign of the Type IIn supernova (SN) 2018cnf (aka ASASSN-18mr). It was discovered about 10 days before the maximum light (on MJD = 58293.4+-5.7 in the V band, with MV = -18.13+-0.15 mag). The…

Solar and Stellar Astrophysics · Physics 2019-09-04 A. Pastorello , A. Reguitti , A. Morales-Garoffolo , Z. Cano , S. J. Prentice , D. Hiramatsu , J. Burke , E. Kankare , R. Kotak , T. Reynolds , S. J. Smartt , S. Bose , Ping Chen , E. Congiu , Subo Dong , S. Geier , M. Gromadzki , E. Y. Hsiao , S. Kumar , P. Ochner , G. Pignata , L. Tomasella , L. Wang , I. Arcavi , C. Ashall , E. Callis , A. de Ugarte Postigo , M. Fraser , G. Hosseinzadeh , D. A. Howell , C. Inserra , D. A. Kann , E. Mason , P. A. Mazzali , C. McCully , O. Rodriguez , M. M. Phillips , K. W. Smith , L. Tartaglia , C. C. Thoene , T. Wevers , D. R. Young , M. L. Pumo , T. B. Lowe , E. A. Magnier , R. J. Wainscoat , C. Waters , D. E. Wright

The properties of the peculiar Type Ia SN~1991bg. Analysis and discussion of two years of observations

Observations of the peculiar type Ia SN~1991bg in NGC~4374 collected at ESO--La Silla and Asiago are presented and discussed. The broad--band light curves in the early months have a narrower peak and a luminosity decline faster than other…

Astrophysics · Physics 2015-06-24 M. Turatto , S. Benetti , E. Cappellaro , I. J. Danziger , M. Della Valle , C. Gouiffes , P. A. Mazzali , F. Patat

Type Ia Supernovae Strongly Interacting with Their Circumstellar Medium

Owing to their utility for measurements of cosmic acceleration, Type Ia supernovae (SNe) are perhaps the best-studied class of SNe, yet the progenitor systems of these explosions largely remain a mystery. A rare subclass of SNe Ia show…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Jeffrey M. Silverman , Peter E. Nugent , Avishay Gal-Yam , Mark Sullivan , D. Andrew Howell , Alexei V. Filippenko , Iair Arcavi , Sagi Ben-Ami , Joshua S. Bloom , S. Bradley Cenko , Yi Cao , Ryan Chornock , Kelsey I. Clubb , Alison L. Coil , Ryan J. Foley , Melissa L. Graham , Christopher V. Griffith , Assaf Horesh , Mansi M. Kasliwal , Shrinivas R. Kulkarni , Douglas C. Leonard , Weidong Li , Thomas Matheson , Adam A. Miller , Maryam Modjaz , Eran O. Ofek , Yen-Chen Pan , Daniel A. Perley , Dovi Poznanski , Robert M. Quimby , Thea N. Steele , Assaf Sternberg , Dong Xu , Ofer Yaron

Peculiar Spectral Evolution of the Type I Supernova 2019eix: A Possible Double Detonation from a Helium Shell on a Sub-Chandrasekhar-mass White Dwarf

We present photometric and spectroscopic data for the nearby Type I supernova (SN Ia) 2019eix (originally classified as a SN Ic), from its discovery day up to 100 days after maximum brightness. Before maximum light SN 2019eix resembles a…

High Energy Astrophysical Phenomena · Physics 2023-08-09 E. Padilla Gonzalez , D. Andrew Howell , J. Burke , Yize Dong , D. Hiramatsu , C. McCully , C. Pellegrino , W. Kerzendorf , M. Modjaz , G. Terreran , M. Williamson

SN 2021dbg: A Luminous Type IIP-IIL Supernova Exploding from a Massive Star with a Layered Shell

We present extensive observations and analysis of supernova (SN) 2021dbg, utilizing optical photometry and spectroscopy. For approximately 385 days following the explosion, SN 2021dbg exhibited remarkable luminosity, surpassing most SNe II.…

High Energy Astrophysical Phenomena · Physics 2024-07-17 Zeyi Zhao , Jujia Zhang , Liping Li , Qian Zhai , Yongzhi Cai , Shubham Srivastav , Xiaofeng Wang , Han Lin , Yi Yang , Alexei V. Filippenko , Thomas G. Brink , WeiKang Zheng

Nearby Supernova Factory Observations of SN 2005gj: Another Type Ia Supernova in a Massive Circumstellar Envelope

We report Nearby Supernova Factory observations of SN 2005gj, the second confirmed case of a "hybrid" Type Ia/IIn supernova. Our early-phase photometry of SN 2005gj shows that the interaction is much stronger than for the prototype, SN…

Astrophysics · Physics 2010-11-11 The Nearby Supernova Factory Collaboration , G. Aldering , P. Antilogus , S. Bailey , C. Baltay , A. Bauer , N. Blanc , S. Bongard , Y. Copin , E. Gangler , S. Gilles , R. Kessler , D. Kocevski , B. C. Lee , S. Loken , P. Nugent , R. Pain , E. Pecontal , R. Pereira , S. Perlmutter , D. Rabinowitz , G. Rigaudier , R. Scalzo , G. Smadja , R. C. Thomas , L. Wang , B. A. Weaver

Spectroscopic Observations of SN 2012fr: A Luminous Normal Type Ia Supernova with Early High Velocity Features and Late Velocity Plateau

We present 65 optical spectra of the Type Ia supernova SN 2012fr, of which 33 were obtained before maximum light. At early times SN 2012fr shows clear evidence of a high-velocity feature (HVF) in the Si II 6355 line which can be cleanly…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 M. J. Childress , R. A. Scalzo , S. A. Sim , B. E. Tucker , F. Yuan , B. P. Schmidt , S. B. Cenko , J. M. Silverman , C. Contreras , E. Y. Hsiao , M. Phillips , N. Morrell , S. W. Jha , C. McCully , A. V. Filippenko , J. P. Anderson , S. Benetti , F. Bufano , T. de Jaeger , F. Forster , A. Gal-Yam , L. Le Guillou , K. Maguire , J. Maund , P. A. Mazzali , G. Pignata , S. Smartt , J. Spyromilio , M. Sullivan , F. Taddia , S. Valenti , D. D. R. Bayliss , M. Bessell , G. A. Blanc , D. J. Carson , K. I. Clubb , C. de Burgh-Day , T. D. Desjardins , J. J. Fang , O. D. Fox , E. L. Gates , I-T. Ho , S. Keller , P. L. Kelly , C. Lidman , N. S. Loaring , J. R. Mould , M. Owers , S. Ozbilgen , L. Pei , T. Pickering , M. B. Pracy , J. A. Rich , B. E. Schaefer , N. Scott , M. Stritzinger , F. P. A. Vogt , G. Zhou

SN 2018gj: A Short-plateau Type II Supernova with Persistent Blue-shifted H-alpha Emission

We present an extensive, panchromatic photometric (UV, Optical, and NIR) and low-resolution optical spectroscopic coverage of a Type IIP supernova SN 2018gj that occurred on the outskirts of the host galaxy NGC 6217. From the V-band light…

High Energy Astrophysical Phenomena · Physics 2023-09-07 Rishabh Singh Teja , Avinash Singh , D. K. Sahu , G. C. Anupama , Brajesh Kumar , Tatsuya Nakaoka , Koji S Kawabata , Masayuki Yamanaka , Takey Ali , Miho Kawabata

Variable H$\alpha$ Emission in the Nebular Spectra of the Low-Luminosity Type Ia SN2018cqj/ATLAS18qtd

We present optical photometry and spectroscopy of the Type Ia supernova SN2018cqj/ATLAS18qtd. The supernova exploded in an isolated region at $\sim 65$~kpc from the S0 galaxy IC~550 at $z=0.0165$ ($D\approx 74$~Mpc) and has a redshift…

High Energy Astrophysical Phenomena · Physics 2020-02-12 Jose L. Prieto , Ping Chen , Subo Dong , S. Bose , A. Gal-Yam , T. W. -S. Holoien , J. A. Kollmeier , M. M. Phillips , B. J. Shappee

Constraining the Source of the High-velocity Ejecta in Type Ia SN 2019ein

We present multiwavelength photometric and spectroscopic observations of SN 2019ein, a high-velocity Type Ia supernova (SN Ia) discovered in the nearby galaxy NGC 5353 with a two-day nondetection limit. SN 2019ein exhibited some of the…

High Energy Astrophysical Phenomena · Physics 2020-07-20 C. Pellegrino , D. A. Howell , S. K. Sarbadhicary , J. Burke , D. Hiramatsu , C. McCully , P. A. Milne , J. E. Andrews , P. Brown , L. Chomiuk , E. Y. Hsiao , D. J. Sand , M. Shahbandeh , N. Smith , S. Valenti , J. Vinkó , J. C. Wheeler , S. Wyatt , Y. Yang

Type Ia supernovae from non-accreting progenitors

Type Ia supernovae (SNe Ia) are manifestations of stars deficient of hydrogen and helium disrupting in a thermonuclear runaway. While explosions of carbon-oxygen white dwarfs are thought to account for the majority of events, part of the…

Solar and Stellar Astrophysics · Physics 2020-03-11 John Antoniadis , Savvas Chanlaridis , Götz Gräfener , Norbert Langer

Optical Observations of the Type Ia Supernova 2011fe in M101 for Nearly 500 Days

We present well-sampled optical observations of the bright Type Ia supernova (SN~Ia) SN 2011fe in M101. Our data, starting from $\sim16$ days before maximum light and extending to $\sim463$ days after maximum, provide an unprecedented time…

High Energy Astrophysical Phenomena · Physics 2016-04-06 Kaicheng Zhang , Xiaofeng Wang , JuJia Zhang , Tianmeng Zhang , Mohan Ganeshalingam , Weidong Li , Alexei V. Filippenko , Xulin Zhao , Weikang Zheng , Jinming Bai , Jia Chen , Juncheng Chen , Fang Huang , Jun Mo , Liming Rui , Hao Song , Hanna Sai , Wenxiong Li , Lifan Wang , Chao Wu

High luminosity, slow ejecta and persistent carbon lines: SN 2009dc challenges thermonuclear explosion scenarios

SN 2009dc shares similarities with normal Type Ia supernovae, but is clearly overluminous, with a (pseudo-bolometric) peak luminosity of log(L) = 43.47 [erg/s]. Its light curves decline slowly over half a year after maximum light, and the…

Solar and Stellar Astrophysics · Physics 2015-05-20 S. Taubenberger , S. Benetti , M. Childress , R. Pakmor , S. Hachinger , P. A. Mazzali , V. Stanishev , N. Elias-Rosa , I. Agnoletto , F. Bufano , M. Ergon , A. Harutyunyan , C. Inserra , E. Kankare , M. Kromer , H. Navasardyan , J. Nicolas , A. Pastorello , E. Prosperi , F. Salgado , J. Sollerman , M. Stritzinger , M. Turatto , S. Valenti , W. Hillebrandt

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

Massive stars exploding in a He-rich circumstellar medium $-$ X. Flash spectral features in the Type Ibn SN 2019cj and observations of SN 2018jmt

We present optical and near-infrared observations of two Type Ibn supernovae (SNe), SN 2018jmt and SN 2019cj. Their light curves have rise times of about 10 days, reaching an absolute peak magnitude of $M_g$(SN 2018jmt) = $-$19.07 $\pm$…

High Energy Astrophysical Phenomena · Physics 2024-11-13 Z. -Y. Wang , A. Pastorello , K. Maeda , A. Reguitti , Y. -Z. Cai , D. Andrew Howell , S. Benetti , D. Buckley , E. Cappellaro , R. Carini , R. Cartier , T. -W. Chen , N. Elias-Rosa , Q. -L. Fang , A. Gal-Yam , A. Gangopadhyay , M. Gromadzki , W. -P. Gan , D. Hiramatsu , M. -K. Hu , C. Inserra , C. McCully , M. Nicholl , F. E. Olivares , G. Pignata , J. Pineda-Garc'ia , M. Pursiainen , F. Ragosta , A. Rau , R. Roy , J. Sollerman , L. Tartaglia , G. Terreran , G. Valerin , Q. Wang , S. -Q. Wang , D. R. Young , A. Aryan , M. Bronikowski , E. Concepcion , L. Galbany , H. Lin , A. Melandri , T. Petrushevska , M. Ramirez , D. -D Shi , B. Warwick , J. -J. Zhang , B. Wang , X. -F. Wang , X. -J. Zhu