Related papers: Comparative Direct Analysis of Type Ia Supernova S…

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

Type W and Type 15bn subgroups of hydrogen-poor superluminous supernovae: pre-maximum diversity, post-maximum homogeneity?

In this study, we analyze the post-maximum spectra of a sample of 27 Type I superluminous supernovae (SLSNe-I) in order to search for physical differences between the so-called Type W and Type 15bn sub-types. This paper is a continuation of…

High Energy Astrophysical Phenomena · Physics 2023-05-30 Réka Könyves-Tóth , Bálint Seli

Statistical Connections Between the Properties of Type Ia Supernovae and the B--V Colors of Their Parent Galaxies, and the Value of H$_0$

Statistical connections between the properties of Type Ia supernovae (SNe Ia) and the B--V colors of their parent galaxies are established. Compared to SNe Ia in blue galaxies [B-V$\la$0.75], SNe Ia in redder galaxies have (1) a wider…

Astrophysics · Physics 2016-08-30 David Branch , W. Romanishin , E. Baron

[OI] 6300,6364 in the nebular spectrum of a subluminous Type Ia supernova

In this letter a late-phase spectrum of SN 2010lp, a subluminous Type Ia supernova (SN Ia), is presented and analysed. As in 1991bg-like SNe Ia at comparable epochs, the spectrum is characterised by relatively broad [FeII] and [CaII]…

Solar and Stellar Astrophysics · Physics 2015-06-16 S. Taubenberger , M. Kromer , R. Pakmor , G. Pignata , K. Maeda , S. Hachinger , B. Leibundgut , W. Hillebrandt

Photometric Identification of Type Ia Supernovae at Moderate Redshift

Large photometric surveys with the aim of identifying many Type Ia supernovae (SNe) at moderate redshift are challenged in separating these SNe from other SN types. We are motivated to identify Type Ia SNe based only on broadband…

Astrophysics · Physics 2008-11-26 Benjamin D. Johnson , Arlin P. S. Crotts

Spectral Dataset of Stripped-Envelope Supernovae from the Tsinghua Supernova Group

The extent of envelope stripping in the progenitor stars is directly reflected in the diversity of spectral features observed in stripped-envelope supernovae (SESNe). Through extensive spectral observation and analysis, we aim to clarify…

High Energy Astrophysical Phenomena · Physics 2026-04-15 Danfeng Xiang , Xiaofeng Wang , Jujia Zhang , Shengyu Yan , Han Lin , Liming Rui , Jun Mo , Xinghan Zhang , Hanna Sai , Cheng Miao , Gaobo Xi , Zhihao Chen , Fangzhou Guo , Xiaoran Ma , Gaici Li , Tianmeng Zhang , Liyang Chen , Jialian Liu , Wenxiong Li , Xulin Zhao , Fang Huang , Yongzhi Cai , Weili Lin , Jie Lin , Chengyuan Wu , Maokai Hu , Cuiying Song , Jicheng Zhang , Qiqi Xia , Zhitong Li , Linyi Li , Kaicheng Zhang , Qian Zhai , Juncheng Chen , Zhou Fan , Jianning Fu , Shengbang Qian , Hong Wu , Xue-Bing Wu , Huawei Zhang , Junbo Zhang , Liyun Zhang , Jie Zheng

The HSC-SSP Transient Survey: Implications from Early Photometry and Rise Time of Normal Type Ia Supernovae

With a booming number of Type Ia supernovae (SNe Ia) discovered within a few days of their explosions, a fraction of SNe Ia that show luminosity excess in the early phase (early-excess SNe Ia) have been confirmed. In this article, we report…

High Energy Astrophysical Phenomena · Physics 2020-04-01 Ji-an Jiang , Naoki Yasuda , Keiichi Maeda , Mamoru Doi , Toshikazu Shigeyama , Nozomu Tominaga , Masaomi Tanaka , Takashi J. Moriya , Ichiro Takahashi , Nao Suzuki , Tomoki Morokuma , Ken'ichi Nomoto

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

ZTF SN Ia DR2: The secondary maximum in Type Ia supernovae

Type Ia supernova (SN Ia) light curves have a secondary maximum that exists in the $r$, $i$, and near-infrared filters. The secondary maximum is relatively weak in the $r$ band, but holds the advantage that it is accessible, even at high…

High Energy Astrophysical Phenomena · Physics 2025-02-19 M. Deckers , K. Maguire , L. Shingles , G. Dimitriadis , M. Rigault , M. Smith , A. Goobar , J. Nordin , J. Johansson , M. Amenouche , U. Burgaz , S. Dhawan , M. Ginolin , L. Harvey , W. D. Kenworthy , Y. -L. Kim , R. R. Laher , N. Luo , S. R. Kulkarni , F. J. Masci , T. E. Müller-Bravo , P. E. Nugent , N. Pletskova , J. Purdum , B. Racine , J. Sollerman , J. H. Terwel

Early Observations and Analysis of the Type Ia SN 2014J in M82

We present optical and near infrared (NIR) observations of the nearby Type Ia SN 2014J. Seventeen optical and twenty-three NIR spectra were obtained from 10 days before ($-$10d) to 10 days after (+10d) the time of maximum $B$-band…

Astrophysics of Galaxies · Physics 2015-06-19 G. H. Marion , D. J. Sand , E. Y. Hsiao , D. P. K. Banerjee , S. Valenti , M. D. Stritzinger , J. Vinkó , V. Joshi , V. Venkataraman , N. M. Ashok , R. Amanullah , R. P. Binzel , J. J. Bochanski , G. L. Bryngelson , C. R. Burns , D. Drozdov , S. K. Fieber-Beyer , M. L. Graham , D. A. Howell , J. Johansson , R. P. Kirshner , P. A. Milne , J. Parrent , J. M. Silverman , R. J. Vervack , J. C. Wheeler

The 1999aa-like Type Ia Supernova iPTF14bdn in the Ultraviolet and Optical

We present ultraviolet (UV) and optical photometry and spectra of the 1999aa-like supernova (SN) iPTF14bdn. The UV data were observed using the Swift Ultraviolet/Optical Telescope (UVOT) and constitute the first UV spectral series of a…

High Energy Astrophysical Phenomena · Physics 2015-11-04 Michael T. Smitka , Peter J. Brown , Nicholas B. Suntzeff , Jujia Zhang , Xiaofeng Wang , Qian Zhai , Jun Mo , Tianmeng Zhang

Diversity of supernovae Ia determined using equivalent widths of Si II 4000

Spectroscopic and photometric properties of low and high-z supernovae Ia (SNe Ia) have been analyzed in order to achieve a better understanding of their diversity and to identify possible SN Ia sub-types. We use wavelet transformed spectra…

Astrophysics · Physics 2009-01-05 V. Arsenijevic , S. Fabbro , A. M. Mourao , A. J. Rica da Silva

The Carnegie Supernova Project-I. Spectroscopic analysis of stripped-envelope supernovae

An analysis leveraging 170 optical spectra of 35 stripped-envelope (SE) core-collapse supernovae observed by the Carnegie Supernova Project-I and published in a companion paper is presented. Mean template spectra are constructed for the SNe…

High Energy Astrophysical Phenomena · Physics 2023-08-21 S. Holmbo , M. D. Stritzinger , E. Karamehmetoglu , C. R. Burns , N. Morrell , C. Ashall , E. Y. Hsiao , L. Galbany , G. Folatelli , M. M. Phillips , E. Baron , C. P. Gutierrez , G. Leloudas , T. E. Muller-Bravo , P. Hoeflich , F. Taddia , N. B. Suntzeff

A Speed Bump: SN 2021aefx Shows that Doppler Shift Alone can Explain Early-Excess Blue Flux in Some Type Ia Supernovae

We present early-time photometric and spectroscopic observations of the Type Ia Supernova (SN Ia) 2021aefx. The early time u-band light curve shows an excess flux when compared to normal SNe Ia. We suggest that the early-excess blue flux…

High Energy Astrophysical Phenomena · Physics 2022-06-15 C. Ashall , J. Lu , B. J. Shappee , C. R. Burns , E. Y. Hsiao , S. Kumar , N. Morrell , M. M. Phillips , M. Shahbandeh , E. Baron , K. Boutsia , P. J. Brown , J. M. DerKacy , L. Galbany , P. Hoeflich , K. Krisciunas , P. Mazzali , A. L. Piro , M. D. Stritzinger , N. B. Suntzeff

Evidence for Type Ia Supernova Diversity from Ultraviolet Observations with the Hubble Space Telescope

We present ultraviolet (UV) spectroscopy and photometry of four Type Ia supernovae (SNe 2004dt, 2004ef, 2005M, and 2005cf) obtained with the UV prism of the Advanced Camera for Surveys on the Hubble Space Telescope. This dataset provides…

High Energy Astrophysical Phenomena · Physics 2015-05-30 Xiaofeng Wang , Lifan Wang , Alexei V. Filippenko , Eddie Baron , Markus Kromer , Dennis Jack , Tianmeng Zhang , Greg Aldering , Pierre Antilogus , David Arnett , Dietrich Baade , Brian J. Barris , Stefano Benetti , Patrice Bouchet , Adam S. Burrows , Ramon Canal , Enrico Cappellaro , Raymond Carlberg , Elisa di Carlo , Peter Challis , Arlin Crotts , John I. Danziger , Massimo Della Valle , Michael Fink , Ryan J. Foley , Claes Fransson , Avishay Gal-Yam , Peter Garnavich , Chris L. Gerardy , Gerson Goldhaber , Mario Hamuy , Wolfgang Hillebrandt , Peter A. Hoeflich , Stephen T. Holland , Daniel E. Holz , John P. Hughes , David J. Jeffery , Saurabh W. Jha , Dan Kasen , Alexei M. Khokhlov , Robert P. Kirshner , Robert Knop , Cecilia Kozma , Kevin Krisciunas , Brian C. Lee , Bruno Leibundgut , Eric J. Lentz , Douglas C. Leonard , Walter H. G. Lewin , Weidong Li , Mario Livio , Peter Lundqvist , Dan Maoz , Thomas Matheson , Paolo Mazzali , Peter Meikle , Gajus Miknaitis , Peter Milne , Stefan Mochnacki , Ken'Ichi Nomoto , Peter E. Nugent , Elaine Oran , Nino Panagia , Saul Perlmutter , Mark M. Phillips , Philip Pinto , Dovi Poznanski , Christopher J. Pritchet , Martin Reinecke , Adam Riess , Pilar Ruiz-Lapuente , Richard Scalzo , Eric M. Schlegel , Brian Schmidt , James Siegrist , Alicia M. Soderberg , Jesper Sollerman , George Sonneborn , Anthony Spadafora , Jason Spyromilio , Richard A. Sramek , Sumner G. Starrfield , Louis G. Strolger , Nicholas B. Suntzeff , Rollin Thomas , John L. Tonry , Amedeo Tornambe , James W. Truran , Massimo Turatto , Michael Turner , Schuyler D. Van Dyk , Kurt Weiler , J. Craig Wheeler , Michael Wood-Vasey , Stan Woosley , Hitoshi Yamaoka

Type II supernova spectral diversity I: Observations, sample characterization and spectral line evolution

We present 888 visual-wavelength spectra of 122 nearby type II supernovae (SNe II) obtained between 1986 and 2009, and ranging between 3 and 363 days post explosion. In this first paper, we outline our observations and data reduction…

High Energy Astrophysical Phenomena · Physics 2017-12-06 Claudia P. Gutiérrez , Joseph P. Anderson , Mario Hamuy , Nidia Morrell , Santiago González-Gaitan , Maximilian D. Stritzinger , Mark M. Phillips , Lluis Galbany , Gastón Folatelli , Luc Dessart , Carlos Contreras , Massimo Della Valle , Wendy L. Freedman , Eric Y. Hsiao , Kevin Krisciunas , Barry F. Madore , José Maza , Nicholas B. Suntzeff , Jose Luis Prieto , Luis González , Enrico Cappellaro , Mauricio Navarrete , Alessandro Pizzella , Maria T. Ruiz , R. Chris Smith , Massimo Turatto

Ion Signatures in Supernova Spectra

A systematic survey of ions that could be responsible for features in the optical spectra of supernovae is carried out. Six different compositions that could be encountered in supernovae are considered. For each composition, the LTE optical…

Astrophysics · Physics 2009-10-30 K. Hatano , D. Branch , A. Fisher , J. Deaton , E. Baron

SN 2015bq: A Luminous Type Ia Supernova with Early Flux Excess

We present optical and ultraviolet (UV) observations of a luminous type Ia supernova (SN Ia) SN 2015bq characterized by the early flux excess. This SN reaches a B-band absolute magnitude at $M_B = -19.68 \pm 0.41$ mag and a peak bolometric…

High Energy Astrophysical Phenomena · Physics 2022-01-19 Liping Li , Jujia Zhang , Benzhong Dai , Wenxiong Li , Xiaofeng Wang , Qian Zhai , Jinming Bai

Observations of type Ia supernova SN 2020nlb up to 600 days after explosion, and the distance to M85

The type Ia supernova (SN Ia) SN 2020nlb was discovered in the Virgo Cluster galaxy M85 shortly after explosion. Here we present observations that include one of the earliest high-quality spectra and some of the earliest multi-colour…

High Energy Astrophysical Phenomena · Physics 2024-03-01 S. C. Williams , R. Kotak , P. Lundqvist , S. Mattila , P. A. Mazzali , A. Pastorello , A. Reguitti , M. D. Stritzinger , A. Fiore , I. M. Hook , S. Moran , I. Salmaso

Search For Type Ia Supernova NUV-Optical Subclasses

In response to a recently reported observation of evidence for two classes of Type Ia Supernovae (SNe Ia) distinguished by their brightness in the rest-frame near ultraviolet (NUV), we search for the phenomenon in publicly available…

Cosmology and Nongalactic Astrophysics · Physics 2017-01-16 David Cinabro , Daniel Scolnic , Richard Kessler , Ashley Li , Jake Miller