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Photometry and Spectroscopy of SN 2024pxl: A Luminosity Link Among Type Iax Supernovae

We present extensive ultraviolet to optical photometric and optical to near-infrared (NIR) spectroscopic follow-up observations of the nearby intermediate-luminosity ($M_V = -16.81\pm0.19$~mag) Type Iax supernova (SN) 2024pxl in NGC 6384.…

High Energy Astrophysical Phenomena · Physics 2026-02-04 Mridweeka Singh , Lindsey A. Kwok , Saurabh W. Jha , R. Dastidar , Conor Larison , Alexei V. Filippenko , Jennifer E. Andrews , Moira Andrews , G. C. Anupama , Prasiddha Arunachalam , Katie Auchettl , Dominik BÁnhidi , Barnabas Barna , K. Azalee Bostroem , Thomas G. Brink , RÉgis Cartier , Ping Chen , Collin T. Christy , David A. Coulter , Sofia Covarrubias , Kyle W. Davis , Connor B. Dickinson , Yize Dong , Joseph Farah , Andreas FlÖrs , Ryan J. Foley , Noah Franz , Christoffer Fremling , LluÍs Galbany , Anjasha Gangopadhyay , Aarna Garg , Elinor L. Gates , Or Graur , Alexa C. Gordon , Daichi Hiramatsu , Emily Hoang , D. Andrew Howell , Brian Hsu , Joel Johansson , Arti Joshi , Lordrick A. Kahinga , Ravjit Kaur , Sahana Kumar , Piramon Kumnurdmanee , Hanindyo Kuncarayakti , Natalie Lebaron , C. Lidman , Chang Liu , Keiichi Maeda , Kate Maguire , Bailey Martin , Curtis Mccully , Darshana Mehta , Luca M. Menotti , Anne J. Metevier , A. A. Miller , Kuntal Misra , C. Tanner Murphey , Megan Newsome , Estefania Padilla Gonzalez , Kishore C. Patra , Jeniveve Pearson , Anthony L. Piro , Abigail Polin , Aravind P. Ravi , Armin Rest , Nabeel Rehemtulla , Nicolas Meza Retamal , O. M. Robinson , CÉsar Rojas-Bravo , Devendra K. Sahu , David J. Sand , Brian P. Schmidt , Steve Schulze , Michaela Schwab , Manisha Shrestha , Matthew R. Siebert , Sunil Simha , Nathan Smith , Jesper Sollerman , Shubham Srivastav , Bhagya M. Subrayan , TamÁs Szalai , Kirsty Taggart , Rishabh Singh Teja , Jacco H. Terwel , Samaporn Tinyanont , Stefano Valenti , JÓzsef VinkÓ , Aya L. Westerling , J. Craig Wheeler , Yi Yang , Weikang Zheng

Light curve and spectral evolution of the Type IIb SN 2011fu

We present the low-resolution spectroscopic and UBVRI broad-band photometric investigations of the Type IIb supernova 2011fu, discovered in UGC 01626. The photometric follow-up of this event has been initiated a few days after the explosion…

High Energy Astrophysical Phenomena · Physics 2015-06-12 Brajesh Kumar , S. B. Pandey , D. K. Sahu , J. Vinko , A. S. Moskvitin , G. C. Anupama , V. K. Bhatt , A. Ordasi , A. Nagy , V. V. Sokolov , T. N. Sokolova , V. N. Komarova , Brijesh Kumar , Subhash Bose , Rupak Roy , Ram Sagar

SN 2005cg: Explosion Physics and Circumstellar Interaction of a Normal Type Ia Supernova in a Low-Luminosity Host

We present the spectral evolution, light curve, and corresponding interpretation for the "normal-bright" Type Ia Supernova 2005cg discovered by ROTSE-IIIc. The host is a low-luminosity (M_r = -16.75), blue galaxy with strong indications of…

Astrophysics · Physics 2009-11-13 Robert Quimby , Peter Hoeflich , Sheila J. Kannappan , Eli Rykoff , Wiphu Rujopakarn , Carl W. Akerlof , Christopher L. Gerardy , J. Craig Wheeler

Properties of Type Iax Supernova 2019muj in the Late Phase: Existence, Nature and Origin of the Iron-rich Dense Core

Type Iax Supernovae (SNe Iax) form a class of peculiar SNe Ia, whose early-phase spectra share main spectral line identifications with canonical SNe Ia but with higher ionization and much lower line velocities. Their late-time behaviors…

High Energy Astrophysical Phenomena · Physics 2022-12-14 Keiichi Maeda , Miho Kawabata

SN 2020bqj: a Type Ibn supernova with a long lasting peak plateau

Context: Type Ibn supernovae are a rare class of stripped envelope supernovae interacting with a helium-rich CSM. The majority of the SNe Ibn reported display a surprising homogeneity in their fast lightcurves and starforming hosts. Aims:…

High Energy Astrophysical Phenomena · Physics 2021-08-25 E. C. Kool , E. Karamehmetoglu , J. Sollerman , S. Schulze , R. Lunnan , T. M. Reynolds , C. Barbarino , E. C. Bellm , K. De , D. A. Duev , C. Fremling , V. Z. Golkhou , M. L. Graham , D. A. Green , A. Horesh , S. Kaye , Y. -L. Kim , R. R. Laher , F. J. Masci , J. Nordin , D. A. Perley , E. S. Phinney , M. Porter , D. Reiley , H. Rodriguez , J. van Roestel , B. Rusholme , Y. Sharma , I. Sfaradi , M. T. Soumagnac , K. Taggart , L. Tartaglia , D. R. A. Williams , L. Yan

Spectropolarimetry of the Type Ia Supernova 2012fr

Spectropolarimetry provides the means to probe the 3D geometries of Supernovae at early times. We report spectropolarimetric observations of the Type Ia Supernova 2012fr at four epochs: -11, -5, +2 and +24 days, with respect to B-lightcurve…

Solar and Stellar Astrophysics · Physics 2015-06-12 J. R. Maund , J. Spyromilio , P. A. Hoeflich , J. C. Wheeler , D. Baade , A. Clocchiatti , F. Patat , E. Reilly , L. Wang , P. Zelaya

SN 2022jli: a type Ic supernova with periodic modulation of its light curve and an unusually long rise

We present multi-wavelength photometry and spectroscopy of SN 2022jli, an unprecedented Type Ic supernova discovered in the galaxy NGC 157 at a distance of $\approx$ 23 Mpc. The multi-band light curves reveal many remarkable…

High Energy Astrophysical Phenomena · Physics 2023-09-25 Moore T. , Smartt S. J. , Nicholl M. , Srivastav S. , Stevance H. F. , Jess D. B. , Grant S. D. T. , Fulton M. D. , Rhodes L. , Sim S. A. , Hirai R. , Podsiadlowski P. , Anderson J. P. , Ashall C. , Bate W. , Fender R. , Gutierrez C. P. , Howell D. A. , Huber M. E. , Inserra C. , Leloudas G. , Monard L. A. G. , Muller-Bravo T. E. , Shappee B. J. , Smith K. W. , Terreran G. , Tonry J. , Tucker M. A. , Young D. R. , Aamer A. , Chen T. -W. , Ragosta F. , Galbany L. , Gromadzki M. , Harvey L. , Hoeflich P. , McCully C. , Newsome M. , Gonzalez E. P. , Pellegrino C. , Ramsden P. , Perez-Torres M. , Ridley E. J. , Sheng X. , Weston J

Broad-emission-line dominated hydrogen-rich luminous supernovae

Hydrogen-rich Type II supernovae (SNe II) are the most frequently observed class of core-collapse SNe (CCSNe). However, most studies that analyse large samples of SNe II lack events with absolute peak magnitudes brighter than -18.5 mag at…

High Energy Astrophysical Phenomena · Physics 2023-06-28 P. J. Pessi , J. P. Anderson , G. Folatelli , L. Dessart , S. González-Gaitán , A. Möller , C. P. Gutiérrez , S. Mattila , T. M. Reynolds , P. Charalampopoulos , A. V. Filippenko , L. Galbany , A. Gal-Yam , M. Gromadzki , D. Hiramatsu , D. A. Howell , C. Inserra , E. Kankare , R. Lunnan , L. Martinez , C. McCully , N. Meza , T. E. Müller-Bravo , M. Nicholl , C. Pellegrino , G. Pignata , J. Sollerman , B. E. Tucker , X. Wang , D. R. Young

A luminous, blue progenitor system for a type-Iax supernova

Type-Iax supernovae (SN Iax) are stellar explosions that are spectroscopically similar to some type-Ia supernovae (SN Ia) at maximum light, except with lower ejecta velocities. They are also distinguished by lower luminosities. At late…

Solar and Stellar Astrophysics · Physics 2017-07-05 Curtis McCully , Saurabh W. Jha , Ryan J. Foley , Lars Bildsten , Wen-fai Fong , Robert P. Kirshner , G. H. Marion , Adam G. Riess , Maximilian D. Stritzinger

The Low-Velocity, Rapidly Fading Type Ia Supernova 2002es

SN 2002es is a peculiar subluminous Type Ia supernova (SN Ia) with a combination of observed characteristics never before seen in a SN Ia. At maximum light, SN 2002es shares spectroscopic properties with the underluminous SN 1991bg subclass…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Mohan Ganeshalingam , Weidong Li , Alexei V. Filippenko , Jeffrey M. Silverman , Ryan Chornock , Ryan J. Foley , Thomas Matheson , Robert P. Kirshner , Peter Milne , Mike Calkins , Ken J. Shen

An Emerging Class of Bright, Fast-evolving Supernovae with Low-mass Ejecta

A recent analysis of supernova (SN) 2002bj revealed that it was an apparently unique type Ib SN. It showed a high peak luminosity, with absolute magnitude M_R -18.5, but an extremely fast-evolving light curve. It had a rise time of <7 days…

High Energy Astrophysical Phenomena · Physics 2015-05-19 Hagai B. Perets , Carles Badenes , Iair Arcavi , Joshua D. Simon , Avishay Gal-yam

Spectroscopy of SN 1987A at 0.9-2.4 microns: Days 1348-3158

We present near-infrared spectroscopic observations of SN 1987A covering the period 1358 to 3158 days post-explosion. This is the first time that IR spectra of a supernova have been obtained to such late epochs. The spectra comprise…

Astrophysics · Physics 2009-11-07 A. Fassia , W. P. S. Meikle , J. Spyromilio

23 GHz VLBI Observations of SN 2008ax

We report on phase-referenced 23 GHz Very-Long-Baseline-Interferometry (VLBI) observations of the type IIb supernova SN 2008ax, made with the Very Long Baseline Array (VLBA) on 2 April 2008 (33 days after explosion). These observations…

Astrophysics of Galaxies · Physics 2015-05-13 I. Marti-Vidal , J. M. Marcaide , A. Alberdi , J. C. Guirado , M. A. Perez-Torres , E. Ros , I. I. Shapiro , R. J. Beswick , T. W. B. Muxlow , A. Pedlar , M. K. Argo , S. Immler , N. Panagia , C. J. Stockdale , R. A. Sramek , S. Van Dyk , K. W. Weiler

Photometry and spectroscopy of the Type Icn supernova 2021ckj: The diverse properties of the ejecta and circumstellar matter of Type Icn SNe

We present photometric and spectroscopic observations of the Type Icn supernova (SN) 2021ckj. Spectral modeling of SN 2021ckj reveals that its composition is dominated by oxygen, carbon and iron group elements, and the photospheric velocity…

High Energy Astrophysical Phenomena · Physics 2023-05-03 T. Nagao , H. Kuncarayakti , K. Maeda , T. Moore , A. Pastorello , S. Mattila , K. Uno , S. J. Smartt , S. A. Sim , L. Ferrari , L. Tomasella , J. P. Anderson , T. -W. Chen , L. Galbany , H. Gao , M. Gromadzki , C. P. Gutiérrez , C. Inserra , E. Kankare , E. A. Magnier , T. E. Müller-Bravo , A. Reguitti , D. R. Young

Nearby Supernova Factory Observations of SN 2007if: First Total Mass Measurement of a Super-Chandrasekhar-Mass Progenitor

We present photometric and spectroscopic observations of SN 2007if, an overluminous (M_V = -20.4), red (B-V = 0.16 at B-band maximum), slow-rising (t_rise = 24 days) type Ia supernova in a very faint (M_g = -14.10) host galaxy. A spectrum…

Cosmology and Nongalactic Astrophysics · Physics 2015-03-13 R. A. Scalzo , G. Aldering , P. Antilogus , C. Aragon , S. Bailey , C. Bongard , C. Buton , M. Childress , N. Chotard , Y. Copin , H. K. Fakhouri , A. Gal-Yam , E. Gangler , S. Hoyer , M. Kasliwal , S. Loken , P. E. Nugent , R. Pain , E. Pecontal , R. Pereira , S. Perlmutter , D. Rabinowitz , A. Rau , G. Rigaudier , K. Runge , G. Smadja , C. Tao , R. C. Thomas , B. Weaver , C. Wu

SN 2024gy: Multi-epoch Spectroscopic Features Suggestive of Delayed Detonation in a Type Ia Supernova

We present photometric and spectroscopic observations of SN 2024gy, a Type Ia supernova (SN Ia) exhibiting high-velocity features (HVFs) in its early-time spectra. This SN reaches a peak $B$-band magnitude of $-19.25 \pm 0.29$ mag and…

High Energy Astrophysical Phenomena · Physics 2025-10-31 Liping Li , Zhenyu Wang , Jialian Liu , Yu Pan , Alexei V. Filippenko , Jujia Zhang , Xiaofeng Wang , Brajesh Kumar , Yi Yang , Thomas G. Brink , WeiKang Zheng , Xiangcun Meng , Lingzhi Wang , Zeyi Zhao , Qian Zhai , Yongzhi Cai , Giuliano Pignata , Xinlei Chen , Xingzhu Zou , Jiewei Zhao , Xiangkun Liu , Xiaowei Liu , Xinzhong Er , A. Reguitti , R. Michael Rich , Jon M. Rees , Mark A. Croom , Osmin Caceres , K. Itagaki , Bo Wang , Jinming Bai

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

The transitional Type Ibn/IIn SN 2022pda, with pre-explosion outbursts and a double-peaked light curve

We report the results of a photometric and spectroscopic follow-up campaign of the unusual interacting supernova (SN) 2022pda. Precursor variability lasting $\sim 100$ days is observed before the explosion. The SN light curve has a double…

High Energy Astrophysical Phenomena · Physics 2026-05-26 Y. -Z. Cai , A. Pastorello , R. Chiba , T. J. Moriya , A. Reguitti , L. Tartaglia , S. Moran , S. Campana , Z. -Y. Wang , J. -W. Zhao , J. P. Anderson , S. Benetti , S. J. Brennan , E. Cappellaro , K. C. Chambers , T. -W. Chen , Z. -H. Chen , T. de Boer , Y. -Z. Dong , J. Duarte , N. Elias-Rosa , M. Fraser , W. -P. Gan , H. Gao , M. Gromadzki , G. Hosseinzadeh , D. A. Howell , C. Inserra , T. Kangas , E. Kankare , T. Kravtsov , L. -P. Li , C. -C. Lin , T. B. Lowe , P. Lundqvist , E. A. Magnier , K. Matilainen , P. A. Mazzali , C. McCully , P. Minguez , T. E. Müller-Bravo , M. Newsome , E. Padilla Gonzalez , C. Pellegrino , P. J. Pessi , T. Petrushevska , G. Pignata , R. P. Santos , S. Schulze , S. J. Smartt , I. A. Smith , K. W. Smith , J. Sollerman , S. Srivastav , M. D. Stritzinger , G. Terreran , G. Valerin , R. Wainscoat , S. -Q. Wang , D. R. Young , L. Galbany , Z. Li , I. Salmaso , S. Zha , J. -M. Bai , B. Wang , X. -F. Wang , J. -J. Zhang

SN 2021foa: The "Flip-Flop" Type IIn / Ibn supernova

We present a comprehensive analysis of the photometric and spectroscopic evolution of SN~2021foa, unique among the class of transitional supernovae for repeatedly changing its spectroscopic appearance from…

High Energy Astrophysical Phenomena · Physics 2024-10-29 D. Farias , C. Gall , G. Narayan , S. Rest , V. A. Villar , C. R. Angus , K. Auchettl , K. W. Davis , R. Foley , A. Gagliano , J. Hjorth , L. Izzo , C. D. Kilpatrick , H . M. L. Perkins , E. Ramirez-Ruiz , C. L. Ransome , A. Sarangi , R. Yarza , D. A. Coulter , D. O. Jones , N. Khetan , A. Rest , M. R. Siebert , J. J. Swift , K. Taggart , S. Tinyanont , P. Wrubel , T. J. L. de Boer , K. E. Clever , A. Dhara , H. Gao , C. -C. Lin

SN 2019ein: A Type Ia Supernova Likely Originated from a Sub-Chandrasekhar-Mass Explosion

We present extensive optical photometric and spectroscopic observations for the nearby Type Ia supernova (SN Ia) 2019ein, spanning the phases from $\sim 3$ days to $\sim 330$ days after the explosion. This SN Ia is characterized by…

High Energy Astrophysical Phenomena · Physics 2022-10-12 Gaobo Xi , Xiaofeng Wang , Wenxiong Li , Jun Mo , Jujia Zhang , Jialian Liu , Zhihao Chen , Alexei V. Filippenko , Weikang Zheng , Thomas G. Brink , Xinghan Zhang , Hanna Sai , Shuhrat A. Ehgamberdiev , Davron Mirzaqulov , Jicheng Zhang