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Aineistot 1-10 / 12

The lowest-metallicity type II supernova from the highest-mass red supergiant progenitor

Morrell N; Gutierrez CP; Kruhler T; Castellon S; Fraser M; Inserra C; Gonzalez C; Anderson P; Chambers KC; Jerkstrand A; Magnier E; Phillips MM; Hosseinzadeh G; Smartt SJ; Contreras C; Sollerman J; Chen TW; Hsiao EY; Galbany L; Flewelling H; Maguire K; Sullivan M; Young DR; Kankare E; Mattila S; Huber M; Agliozzo C; Stritzinger MD; Lowe TB; Valenti S; Dessart L; Gonzalez-Gaitan S

Red supergiants have been confirmed as the progenitor stars of the majority of hydrogen-rich type II supernovae(1). However, while such stars are observed with masses > 25 M-circle dot (ref. (2)), detections of > 18 M-circle ...

Stochastic Modeling of Multiwavelength Variability of the Classical BL Lac Object OJ287 on Timescales Ranging from Decades to Hours

Kuligowska E; Gopal-Krishna; Hovatta T; Er H; de Haro JL; Dimitrov D; Campos F; Zheng W; Berdyugin A; Piirola V; Godunova V; Mugrauer M; Stawarz L; Ostrowski M; Janik J; Kurowski S; Dalessio J; Reynolds T; Raj A; Aller MF; Moore JP; Cheung CC; Schweyer T; Ogloza W; Liakos A; Espasa LT; Koziel-Wierzbowska D; Sobolewska M; Blay P; Matsumoto K; Verrecchia F; Baran A; Simon AO; Filippenko AV; LaCluyze AP; Kvammen A; Mohammed I; Haque S; Sameer; Neely AW; Marchenko V; Sonbas E; Kidger M; Goyal A; Provencal J; Vasylenko VV; Jermak H; Poyner G; Pajdosz U; Valdes JR; Hurst G; Yoneda M; Nogues RN; Drozdz M; Gomez JC; Alfaro FCS; Gopinathan M; Sadakane K; Debski B; Hudec R; Aller HD; Soida M; Boumis P; Chavushyan V; Webb JR; Torrent MC; Bufan Y; Pandey JC; Takalo LO; Reichart D; Pursimo T; Baransky A; Sadegi S; Kaur N; Gazeas K; Ciprini S; Rajkumar B; Garcia F; Kundera T; Perri M; Zola S; Alicavus F; Zejmo M; Strobl J; Karjalainen R; Perez AE; Gafton E; Wiita PJ; Harmanen J; Giroletti M; Gonzalez JLS; Boyd D; Siwak M; Erdem A; Kagitani M; Sakanoi T; Joshi A; Caton DB; Marscher A; Baliyan KS; Reinthal R; Karaman N; Okano S; Lee BC; Ivarsen KM; Ramazani VF; Haislip JB; Pinilla FG; Siemiginowska A; Jorstad S; Nilsson K; Saario J; Zielinski P

We present the results of our power spectral density analysis for the BL Lac object OJ 287, utilizing the Fermi-LAT survey at high-energy.-rays, Swift-XRT in X-rays, several ground-based telescopes and the Kepler satellite ...

The broad-band properties of the intermediate synchrotron peaked BL Lac S2 0109+22 from radio to VHE gamma-rays

Besenrieder J; Sitarek J; Elsaesser D; Ramazani VF; Saito T; Berti A; Berse RC; Vanzo G; Nishijima K; Prester DD; Tammi J; Prandini E; Suric T; Arcaro C; Kubo H; Dorner D; Bhattacharyya W; de Almeida UB; Paiano S; Leone F; Nilsson K; Wierda F; Persic M; Cortina J; De Angelis A; Foffano L; Max-Moerbeck W; Babic A; Moreno V; Ward JE; Lahteenmaki A; Saha L; Penil P; Guberman D; Satalecka K; Kiehlmann S; Da Vela P; Bangale P; Hovatta T; Strzys M; Readhead ACS; Colak SM; Hahn A; Fernandez-Barral A; Lamastra A; Delfino M; Gallozzi S; Hadasch D; Vera RJC; Pfrang K; Gaug M; Tornikoski M; Tsujimoto S; Doro M; Mielke K; Lombardi S; Sobczynska D; Einecke S; Manganaro M; Miranda JM; Hayashida M; Jormanainen J; Noda K; De Lotto B; Kushida J; Chatterjee A; Barcewicz S; Paredes JM; Delgado J; Acosta MV; Ninci D; Contreras JL; Fruck C; Ferrara G; Ceribella G; Garcia JR; Mariotti M; Dazzi F; Maneva G; Paoletti R; Maraschi L; Fonseca MV; Vovk I; Puljak I; Palacio J; Cumani P; Rhode W; Rico J; Biland A; Schweizer T; Bednarek W; Godinovic N; Nogues L; Desiante R; Moroni PGP; Mirzoyan R; Gonzalez JB; Konno Y; Herrera J; Nigro C; Tavecchio F; Lindfors E; Pedaletti G; Banerjee B; Antonelli LA; Hoang J; Mannheim K; Torres-Alba N; Covino S; Mazin D; Masuda S; Neustroev V; Ishio K; Lopez RJG; Moralejo A; Reinthal R; Rosillo MN; Garczarczyk M; Niedzwiecki A; Majumdar P; Rugliancich A; Longo F; Blanch O; Makariev M; Fidalgo D; Colin P; Snidaric I; Baack D; Bonnoli G; Hrupec D; Font L; Stamerra A; Martinez M; Mankuzhiyil N; Lelas D; Ciprini S; D'Elia V; Takalo L; Bigongiari C; Will M; Dominguez A; Carosi R; Fattorini A; Minev M; Ansoldi S; Moretti E; Lopez M; Hassan T; Teshima M; Inoue S; Colombo E; Terzic T; Righi C; Temnikov P; Giammaria P; Maggio C; Zaric D; Di Pierro F; Iwamura Y; Bernardini E; Paneque D; Ribo M; Peresano M; Barrio JA

The Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) telescopes observed S2 0109+22 in 2015 July during its flaring activity in high-energy gamma-rays observed by Fermi-Large Area Telescope. We analyse the MAGIC data ...

A dust-enshrouded tidal disruption event with a resolved radio jet in a galaxy merger

N. Ramírez-Olivencia; K. Nandra; S. Mattila; R. Greimel; I. Martí-Vidal; S. J. Smartt; P. G. Jonker; M. Á. Aloy; M. Pérez-Torres; J. Harmanen; A. Efstathiou; T. Kangas; D. L. Clements; T. Heikkilä; N. A. Walton; E. Kankare; R. Kotak; P. Väisänen; C. Fransson; R. J. Beswick; C. Romero-Cañizales; M. Bondi; G. Östlin; A. Alberdi; A. Alonso-Herrero; S. Ryder; K. Wiik; J. Kotilainen; W. P. S. Meikle; R. Herrero-Illana; M. Fraser; P. Lundqvist; E. Varenius; T. Reynolds; P. Mimica; S. Tsygankov

Tidal disruption events (TDEs) are transient flares produced when a star is ripped apart by the gravitational field of a supermassive black hole (SMBH). We have observed a transient source in the western nucleus of the ...

Multi-wavelength characterization of the blazar S5 0716+714 during an unprecedented outburst phase

Gaug M; Treves A; Marscher A; Myserlis I; Troitsky I; Chatterjee A; Neustroev V; Takahashi M; Gora D; Hahn A; Steele IA; Vovk I; Agudo I; Bastieri D; Miranda JM; Vasilyev AA; Teshima M; Dorner D; Konno Y; Minev M; Kubo H; Nigro C; Font L; Carosi A; Vanzo G; Niedzwiecki A; Palacio J; Tsujimoto S; Covino S; Casadio C; Colak SM; Gallozzi S; Garcia JR; Ansoldi S; Nishijima K; Gurwel M; Acosta MV; Cumani P; Suric T; Grishina TS; Maraschi L; Guberman D; Lopez RJG; Ceribella G; Nalewajko K; Takalo L; Barrio JA; Doro M; Moretti E; Pearson TJ; Garczarczyk M; Righi C; Readhead ACS; Ramazani VF; Hadasch D; Tornikoski M; Troitskaya YV; Mannheim K; Larionov VM; Contreras JL; Longo F; Zensus JA; Babic A; Ribo M; Temnikov P; Nogues L; Carosi R; Jorstad S; Madejski G; Max-Moerbeck W; Dazzi F; Mielke K; Borman GA; Moralejo A; Maneva G; Baack D; Jermak H; Rhode W; Lien AY; Hayashida M; Molina SN; Masuda S; Reeves RA; Paredes JM; Banerjee B; Persic M; Manganaro M; Lombardi S; Kuvezdic D; Gasparrini D; Strzys M; Rosillo MN; Cortina J; Rani B; Lelas D; Ward JE; Arcaro C; Rico J; Puljak I; Godinovic N; Tavecchio F; De Lotto B; Will M; Torres-Alba N; Hose J; Bangale P; Reichardt I; Fonseca MV; Delfino M; Gonzalez JB; Einecke S; Elsaesser D; Berti A; Kraus A; Galindo D; Lindfors E; Moroni PGP; Majumdar P; Lahteenmaki A; Prester DD; Morozova DA; Bonnoli G; Sitarek J; Maggio C; Kuin NPM; Paoletti R; Rugliancich A; Satalecka K; Delgado J; Ramakrishnan V; Giammaria P; Moreno V; Di Pierro F; Mazin D; Jarvela E; Mirzoyan R; Schweizer T; Bhattacharyya W; Biland A; Hovatta T; Nagayoshi T; Ahnen ML; Nilsson K; Colin P; Dominguez A; Lott B; Hassan T; Da Vela P; Savchenko SS; Bednarek W; Larionova LV; Noda K; Prandini E; Sobczynska D; Bernardini E; Kopatskaya EN; Zaric D; Angelakis E; Saito T; Ishio K; Blanch O; Pedaletti G; Krichbaum TP; Herrera J; Thompson DJ; Peresano M; de Almeida UB; Terzic T; Paiano S; Hrupec D; De Angelis A; Martinez M; Antonelli LA; Makariev M; Colombo E; Snidaric I; Kushida J; Berse RC; Lopez M; Fidalgo D; Itoh R; Fruck C; Fernandez-Barral A; Paneque D; Ninci D; Stamerra A; Mariotti M

Context. The BL Lac object S5 0716+714, a highly variable blazar, underwent an impressive outburst in January 2015 (Phase A), followed by minor activity in February (Phase B). The MAGIC observations were triggered by the ...

Long-term optical monitoring of TeV emitting blazars I. Data analysis

K. Nilsson; T. Tuominen; B. Zaprudin; A. Berdyugin; L. O. Takalo; V. Kadenius; S. Ciprini; P. Heinämäki; T. Hovatta; R. Reinthal; M. Pasanen; P. Nurmi; J. Sainio; J. Saarinen; A. Halkola; A. Sillanpää; T. Vornanen; R. Rekola; C. Villforth; L. Ostorero; E. Lindfors

We present ten years of R-band monitoring data of 31 northern blazars which were either detected at very high-energy (VHE) gamma rays or listed as potential VHE gamma-ray emitters. The data comprise 11 820 photometric data ...

First results from GeMS/GSAOI for project SUNBIRD: Supernovae UNmasked By Infra-Red Detection

McDermid RM; Kankare E; Schirmer M; Reynolds T; Ryder S; Efstathiou A; Kotilainen J; Bauer FE; Romero-Canizales C; Alberdi A; Perez-Torres MA; Vaisanen P; Baldwin C; Herrero-Illana R; Mattila S; Kool EC

Core collapse supernova (CCSN) rates suffer from large uncertainties as many CCSNe exploding in regions of bright background emission and significant dust extinction remain unobserved. Such a shortfall is particularly ...

SN 2017dio: A Type-Ic Supernova Exploding in a Hydrogen-rich Circumstellar Medium

Brian Stalder; Seppo Mattila; Erkki Kankare; Jesper Sollerman; Llu´ıs Galbany; Cosimo Inserra; Keiichi Maeda; Gast´on Folatelli; Stephen J. Smartt; Christopher J. Ashall; Armin Rest; Claudia P. Guti´errez; Tuomas Kangas; Stefano Benetti; Rupak Roy; R´egis Cartier; Thomas Reynolds; Nancy Elias-Rosa; Avishay Gal-Yam; Maximilian Stritzinger; John Tonry; Massimo Della Valle; Melina C. Bersten; Lina Tomasella; Paolo Mazzali; Andrea Melandri; Giuliano Pignata; Morgan Fraser; Larry Denneau; Auni Somero; David R. Young; Hanindyo Kuncarayakti; Enrico Cappellaro; Francesco Taddia; Ari Heinze; Claes Fransson; Joseph P. Anderson; Aleksandra Hamanowicz; Giorgos Leloudas; Andrea Pastorello; Peter Lundqvist; Simon J. Prentice; Christa Gall; Henry Weiland; Ken W. Smith

<p>SN 2017dio shows both spectral characteristics of a type-Ic supernova (SN) and signs of a hydrogen-rich circumstellar medium (CSM). Prominent, narrow emission lines of H and He are superposed on the continuum. Subsequent ...

Detection of persistent VHE gamma-ray emission from PKS 1510-089 by the MAGIC telescopes during low states between 2012 and 2017

Mirzoyan R; Lombardi S; Hrupec D; Fuentes A; Ansoldi S; De Lotto B; Ramazani VF; Lopez-Oramas A; Palacio J; Nogues L; D'Elia V; Raiteri CM; Gomez JL; Lahteenmaki A; Moreno V; Agudo I; Gallozzi S; Kiehlmann S; Vanzo G; Carosi R; Banerjee B; Antonelli LA; Rosillo MN; Maggio C; Paredes JM; Pedaletti G; Giammaria P; Niedzwiecki A; Snidaric I; Schweizer T; Saha L; Delfino M; Bednarek W; Kushida J; Ribo M; Dazzi F; Colombo E; Ramakrishnan V; Covino S; Tornikoski M; Will M; Minev M; Sobczynska D; Prandini E; Tsujimoto S; Dorner D; Bernardini E; Paneque D; Puljak I; Righi C; de Almeida UB; Persic M; Kim JY; Traianou E; Godinovic N; Munar-Adrover P; Babic A; Hoang J; Paoletti R; Ceribella G; Espinera ED; Fruck C; Lopez RJG; Kubo H; Elsaesser D; Blanch O; Ninci D; Mannheim K; Mariotti M; Ishio K; Terzic T; Sandrinelli A; Thum C; Foffano L; Suric T; Moralejo A; Kuvezdic D; Bangale P; Stamerra A; Bhattacharyya W; Tammi J; Tavecchio F; Rhode W; Mazin D; Fidalgo D; Nishijima K; Arcaro C; Colin P; Satalecka K; Peresano M; Galindo D; Max-Moerbeck W; Acciari VA; Temnikov P; Molina E; Majumdar P; Di Pierro F; Fattorini A; Maneva G; Garczarczyk M; Moretti E; Cortina J; Engels AA; Bonnoli G; De Angelis A; Bigongiari C; Rico J; Contreras JL; Penil P; Casadio C; Berti A; Da Vela P; Miranda JM; Paiano S; Garcia JR; Nigro C; Biland A; Saito T; Ward JE; Molina SN; Torres-Alba N; van Scherpenberg J; Besenrieder J; Makariev M; Colak SM; Hahn A; Longo F; Lopez M; Lelas D; Inoue S; Baack D; Lamastra A; Maraschi L; Guberman D; Myserlis I; Vovk I; Fonseca MV; Zari D; Manganaro M; Ferrara G; Martinez M; Barrio JA; Somero A; Einecke S; Dominguez A; Font L; Teshima M; Herrera J; Gonzalez JB; Nilsson K; Neustroev V; Delgado J; Prester DD; Sitarek J; Lindfors; Strzys M; Iwamura Y; Hadasch D; Cikota S; Acosta MV; Masuda S; Gaug M; Hassan T; Noda K; Leone F; Moroni PGP; Fernandez-Barral A; Doro M; Hovatta T; Rugliancich A

Context. PKS 1510-089 is a flat spectrum radio quasar strongly variable in the optical and GeV range. To date, very high-energy (VHE, >100 GeV) emission has been observed from this source either during long high states of ...

The Early Detection and Follow-up of the Highly Obscured Type II Supernova 2016ija/DLT16am

S. J. Smartt; K. Maguire; C. McCully; R. J. Foley; M. Della Valle; G. Hosseinzadeh; A. Gal-Yam; M. M. Phillips; T. J. Maccarone; M. D. Stritzinger; A. Cikota; S. Mattila; N. Morrell; D. R. Young; T.-W. Chen; J. Sollerman; L. Galbany; C. Ashall; S. Valenti; D. E. Reichart; A. L. Piro; S. W. Jha; M. Sullivan; P. A. Mazzali; J. P. Anderson; E. Kankare; S. Prentice; F. Taddia; E. Y. Hsiao; M. T. Botticella; D. Coulter; H. Kuncarayakti; C. Rojas-Bravo; S. Wyatt; D. J. Sand; V. V. Kouprianov; I. Arcavi; C. Gall; A. Melandri; L. Tartaglia; C. Inserra; K. W. Smith; R. Cartier; J. Harmanen; D. A. Howell; G. Pignata; J. B. Haislip; C. D. Kilpatrick

<p>We present our analysis of the Type II supernova DLT16am (SN 2016ija). The object was discovered during the ongoing D< 40 {Mpc} (DLT40) one-day cadence supernova search at r∼ 20.1 {mag} in the “edge-on” nearby ...