Related papers: The early spectral evolution of SN 2004dt

Spectroscopic Observations and Analysis of the Unusual Type Ia SN 1999ac

We present optical spectra of the peculiar Type Ia supernova (SN Ia) 1999ac. The data extend from -15 to +42 days with respect to B-band maximum and reveal an event that is unusual in several respects. Prior to B-band maximum, the spectra…

Astrophysics · Physics 2012-08-27 The Supernova Cosmology Project , : , G. Garavini , G. Aldering , A. Amadon , R. Amanullah , P. Astier , C. Balland , G. Blanc , A. Conley , T. Dahlen , S. E. Deustua , R. Ellis S. Fabbro , V. Fadeyev , X. Fan , G. Folatelli , B. Frye , E. L. Gates , R. Gibbons , G. Goldhaber , B. Goldman , A. Goobar , D. E. Groom , J. Haissinski , D. Hardin , I. Hook , D. A. Howell , S. Kent , A. G. Kim , R. A. Knop , M. Kowalski , N. Kuznetsova , B. C. Lee C. Lidman , J. Mendez , G. J. Miller , M. Moniez , M. Mouchet , A. Mourao , H. Newberg , S. Nobili , P. E. Nugent , R. Pain , O. Perdereau , S. Perlmutter , R. Quimby , N. Regnault , J. Rich , G. T. Richards , P. Ruiz-Lapuente , B. E. Schaefer , K. Schahmaneche , E. Smith , A. L. Spadafora , V. Stanishev , R. C. Thomas , N. A. Walton , L. Wang , W. M. Wood-Vasey

SN 2003du: Signatures of the Circumstellar Environment in a Normal Type Ia Supernova?

We present observations of the Type Ia supernova 2003du and report the detectionof an unusual, high-velocity component in the Ca II infrared triplet, similar tofeatures previously observed in SN 2000cx and SN 2001el. This feature exhibits a…

Astrophysics · Physics 2009-11-10 C. L. Gerardy , P. Hoeflich , R. A. Fesen , G. H. Marion , K. Nomoto , R. Quimby , B. E. Schaefer , L. Wang , J. C. Wheeler

Narrow Transient Absorptions in Late-Time Optical Spectra of Type Ia Supernovae: Evidence for Large Clumps of Iron-Rich Ejecta?

An examination of late-time, optical spectra of type Ia supernovae revealed surprisingly narrow absorption features which only become visible a few months after maximum light. These features, most clearly seen in the late-time spectra of…

High Energy Astrophysical Phenomena · Physics 2018-12-05 Christine S. Black , Robert A. Fesen , Jerod T. Parrent

The evolution of the 3D shape of the broad-lined type Ic SN 2014ad

We present optical spectropolarimetry and spectroscopy of the broad-lined Type Ic (Ic-bl) SN 2014ad. Our spectropolarimetric observations cover 7 epochs, from -2 days to 66 days after V-band maximum, and the spectroscopic data were acquired…

High Energy Astrophysical Phenomena · Physics 2017-06-21 H. F. Stevance , J. R. Maund , D. Baade , P. Höflich , S. Howerton , F. Patat , M. Rose , J. Spyromilio , J. C. Wheeler , L. Wang

Optical Observations of the Rapidly Expanding Type Ia Supernova 2007gi

We present optical photometry and spectra for the Type Ia supernova (SN Ia) 2007gi in the nearby galaxy NGC 4036. SN 2007gi is characterized by extremely high-velocity (HV) features of the intermediate-mass elements (Si, Ca, and S), with…

Solar and Stellar Astrophysics · Physics 2015-05-14 T. Zhang , X. Wang , W. Li , A. V. Filippenko , L. Wang , X. Zhou , P. J. Brown , J. M. Silverman , T. N. Steele , M. Ganeshalingam , J. Li , J. Deng , T. Li , Y. Qiu , M. Zhai , R. Shang

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

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

Over 500 Days in the Life of the Photosphere of the Type Iax Supernova SN 2014dt

Type Iax supernovae (SN Iax) are the largest known class of peculiar white dwarf supernovae, distinct from normal Type Ia supernovae (SN Ia). The unique properties of SN Iax, especially their strong photospheric lines out to extremely late…

High Energy Astrophysical Phenomena · Physics 2023-07-10 Yssavo Camacho-Neves , Saurabh W. Jha , Barnabas Barna , Mi Dai , Alexei V. Filippenko , Ryan J. Foley , Griffin Hosseinzadeh , D. Andrew Howell , Joel Johansson , Patrick Kelly , Wolfgang E. Kerzendorf , Lindsey A. Kwok , Conor Larison , Mark R. Magee , Curtis McCully , John T. O'Brien , Yen-Chen Pan , Viraj Pandya , Jaladh Singhal , Benjamin E. Stahl , Tamás Szalai , Meredith Wieber , Marc Williamson

SN 2014J in M82: New Insights On the Spectral Diversity of Type Ia Supernovae

We present extensive spectroscopic observations for one of the closest type Ia supernovae (SNe Ia), SN 2014J discovered in M82, ranging from 10.4 days before to 473.2 days after B-band maximum light. The diffuse interstellar band (DIB)…

Solar and Stellar Astrophysics · Physics 2018-08-29 Kaicheng Zhang , Xiaofeng Wang , JuJia Zhang , Tianmeng Zhang , S. Benetti , N. Elias-Rosa , Fang Huang , Han Lin , Linyi Li , Wenxiong Li , P. Ochner , A. Pastorello , Liming Rui , L. Tartaglia , L. Tomasella , A. Siviero , U. Munari , G. Terreran , Hao Song , S. Taubenberger , J. Craig Wheeler , Danfeng Xiang , Xulin Zhao , Hongbin Li , Jinming Bai , Xiaojun Jiang , Jianrong Shi , Zhenyu Wu

SN 2017hpa: A Nearby Carbon-Rich Type Ia Supernova with a Large Velocity Gradient

We present extensive, well-sampled optical and ultraviolet photometry and optical spectra of the Type Ia supernova (SN Ia) 2017hpa. The light curves indicate that SN 2017hpa is a normal SN Ia with an absolute peak magnitude of $M_{\rm…

High Energy Astrophysical Phenomena · Physics 2021-03-24 Xiangyun Zeng , Xiaofeng Wang , Ali Esamdin , Craig Pellegrino , WeiKang Zheng , Jujia Zhang , Jun Mo , Wenxiong Li , D. Andrew Howell , Alexei V. Filippenko , Han Lin , Thomas G. Brink , Edward A. Baron , Jamison Burke , James M. DerKacy , Curtis McCully , Daichi Hiramatsu , Griffin Hosseinzadeh , Benjamin T. Jeffers , Timothy W. Ross , Benjamin E. Stahl , Samantha Stegman , Stefano Valenti , Lifan Wang , Danfeng Xiang , Jicheng Zhang , Tianmeng Zhang

The Very Young Type Ia Supernova 2012cg: Discovery and Early-Time Follow-Up Observations

On 2012 May 17.2 UT, only 1.5 +/- 0.2 d after explosion, we discovered SN 2012cg, a Type Ia supernova (SN Ia) in NGC 4424 (d ~ 15 Mpc). As a result of the newly modified strategy employed by the Lick Observatory SN Search, a sequence of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 Jeffrey M. Silverman , Mohan Ganeshalingam , S. Bradley Cenko , Alexei V. Filippenko , Weidong Li , Aaron J. Barth , Daniel J. Carson , Michael Childress , Kelsey I. Clubb , Antonino Cucchiara , Melissa L. Graham , G. H. Marion , My L. Nguyen , Liuyi Pei , Brad E. Tucker , Jozsef Vinko , J. Craig Wheeler , Gabor Worseck

VLT Spectropolarimetry of the fast expanding Type Ia SN2006X

Using VLT-FORS1 we performed optical spectropolarimetric observations of the Type Ia SN2006X on 7 pre-maximum epochs (day -10 to day -1) and one post-maximum epoch (+39 days). The SN shows strong continuum interstellar polarization reaching…

Solar and Stellar Astrophysics · Physics 2010-11-02 F. Patat , D. Baade , P. Hoeflich , J. R. Maund , L. Wang , J. C. Wheeler

The normal Type Ia SN 2003hv out to very late phases

An extensive dataset for SN 2003hv that covers the flux evolution from maximum light to day +786 is presented. The data are combined with published nebular-phase infrared spectra, and the observations are compared to model light curves and…

Solar and Stellar Astrophysics · Physics 2010-02-17 G. Leloudas , M. D. Stritzinger , J. Sollerman , C. R. Burns , C. Kozma , K. Krisciunas , J. R. Maund , P. Milne , A. V. Filippenko , C. Fransson , M. Ganeshalingam , M. Hamuy , W. Li , M. M. Phillips , B. P. Schmidt , J. Skottfelt , S. Taubenberger , L. Boldt , J. P. U. Fynbo , L. Gonzalez , M. Salvo , J. Thomas-Osip

Spectropolarimetry of SN 2001el in NGC 1448: Asphericity of a Normal Type Ia Supernova

High-quality spectropolarimetry (range 417-860 nm; spectral resolution 1.27 nm and 0.265 nm/pixel) of the SN Ia 2001el were obtained with the ESO Very Large Telescope Melipal (+ FORS1) at 5 epochs. The spectra a week before maximum and…

Astrophysics · Physics 2009-11-07 Lifan Wang , Dietrich Baade , Peter Hoeflich , Alexei Khokhlov , J. Craig Wheeler , Daniel Kasen , Peter E. Nugent , Claes Fransson , Peter Lundqvist

Optical and Near-Infrared Observations of the Highly Reddened, Rapidly Expanding Type Ia Supernova 2006X in M100

We present extensive optical (UBVRI), near-infrared (JK) light curves and optical spectroscopy of the Type Ia supernova (SN) 2006X in the nearby galaxy NGC 4321 (M100). Our observations suggest that either SN 2006X has an intrinsically…

Astrophysics · Physics 2009-11-13 Xiaofeng Wang , Weidong Li , Alexei V. Filippenko , Kevin Krisciunas , Nicholas B. Suntzeff , Junzheng Li , Tianmeng Zhang , Jingsong Deng , Ryan J. Foley , Mohan Ganeshalingam , Tipei Li , YuQing Lou , Yulei Qiu , Rencheng Shang , Jeffrey M. Silverman , Shuangnan Zhang , Youhong Zhang

High-Velocity Features: a ubiquitous property of Type Ia SNe

Evidence of high-velocity features such as those seen in the near-maximum spectra of some Type Ia Supernovae (eg SN 2000cx) has been searched for in the available SNIa spectra observed earlier than one week before B maximum. Recent…

Astrophysics · Physics 2009-12-30 P. A. Mazzali , S. Benetti , G. Altavilla , G. Blanc , E. Cappellaro , N. Elias-Rosa , G. Garavini , A. Goobar , A. Harutyunyan , R. Kotak , B. Leibundgut , P. Lundqvist , S. Mattila , J. Mendez , S. Nobili , R. Pain , A. Pastorello , F. Patat , G. Pignata , Ph. Podsiadlowski , P. Ruiz-Lapuente , M. Salvo , B. P. Schmidt , J. Sollerman , V. Stanishev , M. Stehle , C. Tout , M. Turatto , W. Hillebrandt

Evidence of Asymmetry in SN 2007rt, a Type IIn Supernova

An optical photometric and spectroscopic analysis of the slowly-evolving Type IIn SN2007rt is presented, covering a duration of 481 days after discovery. Its earliest spectrum, taken approximately 100 days after the explosion epoch,…

Solar and Stellar Astrophysics · Physics 2015-05-13 C. Trundle , A. Pastorello , S. Benetti , R. Kotak , S. Valenti , I. Agnoletto , F. Bufano , M. Dolci , N. Elias-Rosa , T. Greiner , D. Hunter , F. P. Keenan , V. Lorenzi , K. Maguire , S. Taubenberger

Optical and NIR observations of the nearby type Ia supernova SN 2014J

Optical and NIR observations of the type Ia supernova SN 2014J in M82 are presented. The observed light curves are found to be similar to normal SNe Ia, with a decline rate parameter $\Delta m_{15}(B) = 1.08 \pm 0.03$. The supernova reached…

Solar and Stellar Astrophysics · Physics 2016-02-03 Shubham Srivastav , J. P. Ninan , Brajesh Kumar , G. C. Anupama , D. K. Sahu , D. K. Ojha , T. P. Prabhu

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

The Earliest Near-infrared Time-series Spectroscopy of a Type Ia Supernova

We present ten medium-resolution, high signal-to-noise ratio near-infrared (NIR) spectra of SN 2011fe from SpeX on the NASA Infrared Telescope Facility (IRTF) and Gemini Near-Infrared Spectrograph (GNIRS) on Gemini North, obtained as part…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 E. Y. Hsiao , G. H. Marion , M. M. Phillips , C. R. Burns , C. Winge , N. Morrell , C. Contreras , W. L. Freedman , M. Kromer , E. E. E. Gall , C. L. Gerardy , P. H. Hoeflich , M. Im , Y. Jeon , R. P. Kirshner , P. E. Nugent , S. E. Persson , G. Pignata , M. Roth , V. Stanishev , M. Stritzinger , N. B. Suntzeff