Related papers: The transitional gap transient AT 2018hso: new ins…

The luminous red nova AT 2018bwo in NGC 45 and its binary yellow supergiant progenitor

Luminous Red Novae (LRNe) are astrophysical transients associated with the partial ejection of a binary system's common envelope (CE) shortly before its merger. Here we present the results of our photometric and spectroscopic follow-up…

Solar and Stellar Astrophysics · Physics 2022-01-28 Nadejda Blagorodnova , Jakub Klencki , Ondrej Pejcha , Paul M. Vreeswijk , Howard E. Bond , Kevin B. Burdge , Kishalay De , Christoffer Fremling , Robert D. Gehrz , Jacob E. Jencson , Mansi M. Kasliwal , Thomas Kupfer , Ryan M. Lau , Frank J. Masci , R. Michael Rich

Intermediate-luminosity red transients: Spectrophotometric properties and connection to electron-capture supernova explosions

We present the spectroscopic and photometric study of five intermediate-luminosity red transients (ILRTs), namely AT 2010dn, AT 2012jc, AT 2013la, AT 2013lb, and AT 2018aes. They share common observational properties and belong to a family…

High Energy Astrophysical Phenomena · Physics 2021-10-27 Y. -Z. Cai , A. Pastorello , M. Fraser , M. T. Botticella , N. Elias-Rosa , L. -Z. Wang , R. Kotak , S. Benetti , E. Cappellaro , M. Turatto , A. Reguitti , S. Mattila , S. J. Smartt , C. Ashall , S. Benitez , T. -W. Chen , A. Harutyunyan , E. Kankare , P. Lundqvist , P. A. Mazzali , A. Morales-Garoffolo , P. Ochner , G. Pignata , S. J. Prentice , T. M. Reynolds , X. -W. Shu , M. D. Stritzinger , L. Tartaglia , G. Terreran , L. Tomasella , S. Valenti , G. Valerin , G. -J. Wang , X. -F. Wang , L. Borsato , E. Callis , G. Cannizzaro , S. Chen , E. Congiu , M. Ergon , L. Galbany , A. Gal-Yam , X. Gao , M. Gromadzki , S. Holmbo , F. Huang , C. Inserra , K. Itagaki , Z. Kostrzewa-Rutkowska , K. Maguire , S. Margheim , S. Moran , F. Onori , A. Sagués Carracedo , K. W. Smith , J. Sollerman , A. Somero , B. Wang , D. R. Young

Luminous Red Novae: Stellar Mergers or Giant Eruptions?

We present extensive datasets for a class of intermediate-luminosity optical transients known as "luminous red novae" (LRNe). They show double-peaked light curves, with an initial rapid luminosity rise to a blue peak (at -13 to -15 mag),…

Solar and Stellar Astrophysics · Physics 2019-09-25 A. Pastorello , E. Mason , S. Taubenberger , M. Fraser , G. Cortini , L. Tomasella , M. T. Botticella , N. Elias-Rosa , R. Kotak , S. J. Smartt , S. Benetti , E. Cappellaro , M. Turatto , L. Tartaglia , S. G. Djorgovski , A. J. Drake , M. Berton , F. Briganti , J. Brimacombe , F. Bufano , Y. -Z. Cai , S. Chen , E. J. Christensen , F. Ciabattari , E. Congiu , A. Dimai , C. Inserra , E. Kankare , L. Magill , K. Maguire , F. Martinelli , A. Morales-Garoffolo , P. Ochner , G. Pignata , A. Reguitti , J. Sollerman , S. Spiro , G. Terreran , D. E. Wright

Red eminence: The intermediate-luminosity red transient AT 2022fnm

We present results from a five-month-long observing campaign of the unusual transient AT 2022fnm, which displays properties common to both luminous red novae (LRNe) and intermediate-luminosity red transients (ILRTs). Although its…

High Energy Astrophysical Phenomena · Physics 2024-06-06 S. Moran , R. Kotak , M. Fraser , A. Pastorello , Y. -Z. Cai , G. Valerin , S. Mattila , E. Cappellaro , T. Kravtsov , C. P. Gutiérrez , N. Elias-Rosa , A. Reguitti , P. Lundqvist , T. G. Brink , A. V. Filippenko , X. -F. Wang

A study in scarlet -- II. Spectroscopic properties of a sample of Intermediate Luminosity Red Transients

We investigate the spectroscopic characteristics of Intermediate Luminosity Red Transients (ILRTs), a class of elusive objects with peak luminosity between that of classical novae and standard supernovae. We present the extensive optical…

Solar and Stellar Astrophysics · Physics 2025-03-12 G. Valerin , A. Pastorello , E. Mason , A. Reguitti , S. Benetti , Y. -Z. Cai , T. -W. Chen , D. Eappachen , N. Elias-Rosa , M. Fraser , A. Gangopadhyay , E. Y. Hsiao , D. A. Howell , C. Inserra , L. Izzo , J. Jencson , E. Kankare , R. Kotak , P. Lundqvist , P. A. Mazzali , K. Misra , G. Pignata , S. J. Prentice , D. J. Sand , S. J. Smartt , M. D. Stritzinger , L. Tartaglia , S. Valenti , J. P. Anderson , J. E. Andrews , R. C. Amaro , C. Barbarino , S. Brennan , F. Bufano , E. Callis , E. Cappellaro , R. Dastidar , M. Della Valle , A. Fiore , M. D. Fulton , L. Galbany , M. Gromadzki , T. Heikkilä , D. Hiramatsu , E. Karamehmetoglu , H. Kuncarayakti , G. Leloudas , M. Limongi , M. Lundquist , C. McCully , T. E. Müller-Bravo , M. Nicholl , P. Ochner , E. Padilla Gonzalez , E. Paraskeva , C. Pellegrino , A. Rau , D. E. Reichart , T. M. Reynolds , R. Roy , I. Salmaso , M. Shahbandeh , M. Singh , J. Sollerman , M. Turatto , L. Tomasella , S. Wyatt , D. R. Young

Investigating the Electron Capture Supernova Candidate AT 2019abn with JWST Spectroscopy

The James Webb Space Telescope (JWST) has opened up a new window to study highly reddened explosive transients. We present results from late-time (1421 days post-explosion) JWST follow-up spectroscopic observations with NIRSpec and MIRI LRS…

Solar and Stellar Astrophysics · Physics 2024-07-31 Sam Rose , Ryan M. Lau , Jacob E. Jencson , Mansi M. Kasliwal , Kishalay De , Michael E. Ressler , Ori D. Fox , Matthew J. Hankins

The Evolution of Luminous Red Nova AT 2017jfs in NGC 4470

We present the results of our photometric and spectroscopic follow-up of the intermediate-luminosity optical transient AT 2017jfs. At peak, the object reaches an absolute magnitude of Mg=-15.46+-0.15 mag and a bolometric luminosity of…

Solar and Stellar Astrophysics · Physics 2019-06-04 A. Pastorello , T. -W. Chen , Y. -Z. Cai , A. Morales-Garoffolo , Z. Cano , E. Mason , E. A. Barsukova , S. Benetti , M. Berton , S. Bose , F. Bufano , E. Callis , G. Cannizzaro , R. Cartier , Ping Chen , Subo Dong , S. Dyrbye , N. Elias-Rosa , A. Floers , M. Fraser , S. Geier , V. P. Goranskij , D. A. Kann , H. Kuncarayakti , F. Onori , A. Reguitti , T. Reynolds , I. R. Losada , A. Sagues Carracedo , T. Schweyer , S. J. Smartt , A. M. Tatarnikov , A. F. Valeev , C. Vogl , T. Wevers , A. de Ugarte Postigo , L. Izzo , C. Inserra , E. Kankare , K. Maguire , K. W. Smith , B. Stalder , L. Tartaglia , C. C. Thoene , G. Valerin , D. R. Young

The Fast, Luminous Ultraviolet Transient AT2018cow: Extreme Supernova, or Disruption of a Star by an Intermediate-Mass Black Hole?

Wide-field optical surveys have begun to uncover large samples of fast (t_rise < 5d), luminous (M_peak < -18), blue transients. While commonly attributed to the breakout of a supernova shock into a dense wind, the great distances to the…

High Energy Astrophysical Phenomena · Physics 2019-01-09 Daniel A. Perley , Paolo A. Mazzali , Lin Yan , S. Bradley Cenko , Suvi Gezari , Kirsty Taggart , Nadia Blagorodnova , Christoffer Fremling , Brenna Mockler , Avinash Singh , Nozomu Tominaga , Masaomi Tanaka , Alan M. Watson , Tomás Ahumada , G. C. Anupama , Chris Ashall , Rosa L. Becerra , David Bersier , Varun Bhalerao , Joshua S. Bloom , Nathaniel R. Butler , Chris Copperwheat , Michael W. Coughlin , Kishalay De , Andrew J. Drake , Dmitry A. Duev , Sara Frederick , J. Jesús González , Ariel Goobar , Marianne Heida , Anna Y. Q. Ho , John Horst , Tiara Hung , Ryosuke Itoh , Jacob E. Jencson , Mansi M. Kasliwal , Nobuyuki Kawai , Shrinivas R. Kulkarni , Brajesh Kumar , Harsh Kumar , Alexander S. Kutyrev , Tanazza Khanam , William H. Lee , Keiichi Maeda , Ashish Mahabal , Katsuhiro L. Murata , James D. Neill , Chow-Choong Ngeow , Bryan Penprase , Elena Pian , Robert Quimby , Enrico Ramirez-Ruiz , Michael Richer , Carlos G. Román-Zúñiga , Shubham Srivastava , Quentin Socia , Jesper Sollerman , Yutaro Tachibana , Francesco Taddia , Samaporn Tinyanont , Eleonora Troja , Charlotte Ward , Jerrick Wee

Luminous Red Nova AT 2019zhd, a new merger in M 31

We present the follow-up campaign of the luminous red nova (LRN) AT~2019zhd, the third event of this class observed in M 31. The object was followed by several sky surveys for about five months before the outburst, during which it showed a…

Solar and Stellar Astrophysics · Physics 2021-02-17 A. Pastorello , M. Fraser , G. Valerin , A. Reguitti , K. Itagaki , P. Ochner , S. C. Williams , D. Jones , J. Munday , S. J. Smartt , K. W. Smith , S. Srivastav , N. Elias-Rosa , E. Kankare , E. Karamehmetoglu , P. Lundqvist , P. A. Mazzali , U. Munari , M. D. Stritzinger , L. Tomasella , J. P. Anderson , K. C. Chambers , A. Rest

A study in scarlet -- I. Photometric properties of a sample of Intermediate Luminosity Red Transients

We investigate the photometric characteristics of a sample of Intermediate Luminosity Red Transients (ILRTs), a class of elusive objects with peak luminosity between that of classical novae and standard supernovae. We present the…

Solar and Stellar Astrophysics · Physics 2025-03-12 G. Valerin , A. Pastorello , A. Reguitti , S. Benetti , Y. -Z. Cai , T. -W. Chen , D. Eappachen , N. Elias-Rosa , M. Fraser , A. Gangopadhyay , E. Y. Hsiao , D. A. Howell , C. Inserra , L. Izzo , J. Jencson , E. Kankare , R. Kotak , P. A. Mazzali , K. Misra , G. Pignata , S. J. Prentice , D. J. Sand , S. J. Smartt , M. D. Stritzinger , L. Tartaglia , S. Valenti , J. P. Anderson , J. E. Andrews , R. C. Amaro , S. Brennan , F. Bufano , E. Callis , E. Cappellaro , R. Dastidar , M. Della Valle , A. Fiore , M. D. Fulton , L. Galbany , T. Heikkilä , D. Hiramatsu , E. Karamehmetoglu , H. Kuncarayakti , G. Leloudas , M. Lundquist , C. McCully , T. E. Müller-Bravo , M. Nicholl , P. Ochner , E. Padilla Gonzalez , E. Paraskeva , C. Pellegrino , D. E. Reichart , T. M. Reynolds , R. Roy , I. Salmaso , M. Singh , M. Turatto , L. Tomasella , S. Wyatt , D. R. Young

The luminous red nova variety: AT 2020hat and AT 2020kog

We present the results of our monitoring campaigns of the luminous red novae (LRNe) AT 2020hat in NGC 5068 and AT 2020kog in NGC 6106. The two objects were imaged (and detected) before their discovery by routine survey operations. They show…

Solar and Stellar Astrophysics · Physics 2021-03-17 A. Pastorello , G. Valerin , M. Fraser , N. Elias-Rosa , S. Valenti , A. Reguitti , P. A. Mazzali , R. C. Amaro , J. E. Andrews , Y. Dong , J. Jencson , M. Lundquist , D. E. Reichart , D. J. Sand , S. Wyatt , S. J. Smartt , K. W. Smith , S. Srivastav , Y. -Z. Cai , E. Cappellaro , S. Holmbo , A. Fiore , D. Jones , E. Kankare , E. Karamehmetoglu , P. Lundqvist , A. Morales-Garoffolo , T. M. Reynolds , M. D. Stritzinger , S. C. Williams , K. C. Chambers , T. J. L. de Boer , M. E. Huber , A. Rest , R. Wainscoat

Volumetric rates of Luminous Red Novae and Intermediate Luminosity Red Transients with the Zwicky Transient Facility

Luminous red novae (LRNe) are transients characterized by low luminosities and expansion velocities, and are associated with mergers or common envelope ejections in stellar binaries. Intermediate-luminosity red transients (ILRTs) are an…

High Energy Astrophysical Phenomena · Physics 2023-05-24 Viraj R. Karambelkar , Mansi M. Kasliwal , Nadejda Blagorodnova , Jesper Sollerman , Robert Aloisi , Shreya G. Anand , Igor Andreoni , Thomas G. Brink , Rachel Bruch , David Cook , Kaustav Kashyap Das , Kishalay De , Andrew Drake , Alexei V. Filippenko , Christoffer Fremling , George Helou , Anna Ho , Jacob Jencson , David Jones , Russ R. Laher , Frank J. Masci , Kishore C. Patra , Josiah Purdum , Alexander Reedy , Tawny Sit , Yashvi Sharma , Anastasios Tzanidakis , Stefan J. van der Walt , Yuhan Yao , Chaoran Zhang

AT 2017be - a new member of the class of Intermediate-Luminosity Red Transients

We report the results of our spectrophotometric monitoring campaign for AT~2017be in NGC~2537. Its lightcurve reveals a fast rise to an optical maximum, followed by a plateau lasting about 30 days, and finally a fast decline. Its absolute…

High Energy Astrophysical Phenomena · Physics 2018-08-08 Y-Z. Cai , A. Pastorello , M. Fraser , M. T. Botticella , C. Gall , I. Arcavi , S. Benetti , E. Cappellaro , N. Elias-Rosa , J. Harmanen , G. Hosseinzadeh , D. A. Howell , J. Isern , T. Kangas , E. Kankare , H. Kuncarayakti , P. Lundqvist , S. Mattila , C. McCully , T. M. Reynolds , A. Somero , M. D. Stritzinger , G. Terreran

AT 2019abn: multi-wavelength observations over the first 200 days

AT 2019abn was discovered in the nearby M51 galaxy by the Zwicky Transient Facility at more than two magnitudes and around three weeks prior to its optical peak. We aim to conduct a detailed photometric and spectroscopic follow-up campaign…

Solar and Stellar Astrophysics · Physics 2020-05-13 S. C. Williams , D. Jones , P. Pessev , S. Geier , R. L. M. Corradi , I. M. Hook , M. J. Darnley , O. Pejcha , A. Núñez , S. Meingast , S. Moran

AT 2025abao: The fourth luminous red nova in M 31

We present photometric and spectroscopic observations of the luminous red nova (LRN) AT 2025abao, the fourth discovered in M 31. The LRN, associated to the asymptotic giant branch (AGB) star WNTR23bzdiq, was discovered during the fast rise…

Solar and Stellar Astrophysics · Physics 2026-05-06 A. Reguitti , A. Pastorello , G. Valerin , F. D. Romanov , A. Siviero , Y. -Z. Cai , S. Ciroi , N. Elias-Rosa , T. Iijima , E. Kankare , N. Koivisto , T. Kravtsov , E. Mason , K. Matilainen , A. C. Mura , P. Ochner , T. M. Reynolds , M. D. Stritzinger

The Carnegie Supernova Project II. Observations of the luminous red nova AT 2014ej

We present optical and near-infrared broadband photometry and optical spectra of AT 2014ej from the the Carnegie Supernova Project-II. These observations are complemented with data from the CHilean Automatic Supernova sEarch, the Public ESO…

High Energy Astrophysical Phenomena · Physics 2020-08-25 M. D. Stritzinger , F. Taddia , M. Fraser , T. M. Tauris , C. Contreras , S Drybye , L. Galbany , S. Holmbo , N. Morrell , A. Pastorello , M. M. Phillips , G. Pignata , L. Tartaglia , N. B. Suntzeff , J. Anais , C. Ashall , E. Baron , C. R. Burns , P. Hoeflich , E. Y. Hsiao , E. Karamehmetoglu , T. J. Moriya , G. Bock , A. Campillay , S. Castellon , C. Inserra , C. Gonzalez , P. Marples , S. Parker , D. Reichart , S. Torres-Robledo , D. R. Young

The Carnegie Supernova Project II. Observations of the intermediate luminosity red transient SNhunt120

We present multi-wavelength observations of two gap transients followed by the Carnegie Supernova Project-II and supplemented with data obtained by a number of different programs. Here in the first of two papers, we focus on the…

High Energy Astrophysical Phenomena · Physics 2020-08-25 M. D. Stritzinger , F. Taddia , M. Fraser , T. M. Tauris , N. B. Suntzeff , C. Contreras , S Drybye , L. Galbany , S. Holmbo , N. Morrell , M. M. Phillips , J. L. Prieto , J. Anais , C. Ashall , E. Baron , C. R. Burns , P. Hoeflich , E. Y. Hsiao , E. Karamehmetoglu , T. J. Moriya , M. T. Botticella , A. Campillay , S. Castellon , C. Gonzalez , M. L. Pumo , S. Torres-Robledo

A Luminous Transient Event in a Sample of WISE-Selected Variable AGN

Recently Assef et al.(2018) presented two catalogs of AGN candidates over 30,093 deg^2 selected from the Wide-field Infrared Survey Explorer (WISE) observations. From their most reliable sample, Assef et al. (2018) identified 45 AGN…

Astrophysics of Galaxies · Physics 2018-11-27 R. J. Assef , J. L. Prieto , D. Stern , R. M. Cutri , P. R. M. Eisenhardt , M. J. Graham , H. D. Jun , A. Rest , H. A. Flewelling , N. Kaiser , R. -P. Kudritzki , C. Waters

Signatures of Circumstellar Interaction in the Unusual Transient AT2018cow

AT2018cow is a unique transient that stands out due to its relatively fast light-curve, high peak bolometric luminosity, and blue color. These properties distinguish it from typical radioactively powered core-collapse supernovae (SNe).…

High Energy Astrophysical Phenomena · Physics 2019-07-31 Ori D. Fox , Nathan Smith

Panchromatic evolution of three luminous red novae: Forbidden hugs in pandemic times -- IV

We present photometric and spectroscopic data on three extragalactic luminous red novae (LRNe): AT2018bwo, AT2021afy, and AT2021blu. AT2018bwo was discovered in NGC45 (at 6.8 Mpc) a few weeks after the outburst onset. During the monitoring…

Solar and Stellar Astrophysics · Physics 2023-03-22 A. Pastorello , G. Valerin , M. Fraser , A. Reguitti , N. Elias-Rosa , A. V. Filippenko , C. Rojas-Bravo , L. Tartaglia , T. M. Reynolds , S. Valenti , J. E. Andrews , C. Ashall , K. A. Bostroem , T. G. Brink , J. Burke , Y. -Z. Cai , E. Cappellaro , D. A. Coulter , R. Dastidar , K. W. Davis , G. Dimitriadis , A. Fiore , R. J. Foley , D. Fugazza , L. Galbany , A. Gangopadhyay , S. Geier , C. P. Gutierrez , J. Haislip , D. Hiramatsu , S. Holmbo , D. A. Howell , E. Y. Hsiao , T. Hung , S. W. Jha , E. Kankare , E. Karamehmetoglu , C. D. Kilpatrick , R. Kotak , V. Kouprianov , T. Kravtsov , S. Kumar , Z. -T. Li , M. J. Lundquist , P. Lundqvist , K. Matilainen , P. A. Mazzali , C. McCully , K. Misra , A. Morales-Garoffolo , S. Moran , N. Morrell , M. Newsome , E. Padilla Gonzalez , Y. -C. Pan , C. Pellegrino , M. M. Phillips , G. Pignata , A. L. Piro , D. E. Reichart , A. Rest , I. Salmaso , D. J. Sand , M. R. Siebert , S. J. Smartt , K. W. Smith , S. Srivastav , M. D. Stritzinger , K. Taggart , S. Tinyanont , S. -Y. Yan , L. Wang , X. -F. Wang , S. C. Williams , S. Wyatt , T. -M. Zhang , T. de Boer , K. Chambers , H. Gao , E. Magnier