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Aineistot 31-40 / 447

Bright Mini-outburst Ends the 12 yr Long Activity of the Black Hole Candidate Swift J1753.5-0127

A. Al Qasim; R. Doran; G.-B. Zhang; P. Kobel; P. A. Charles; D. Perez; F. Bernardini; J. Homan; D. M. Russell; K. I. I. Koljonen; J. A. Tomsick; J. D. Gelfand; A. W. Shaw; D. Maitra; A. AlMannaei; J.-P. Lasota; J. C. A. Miller-Jones; F. Lewis; R. M. Plotkin

We present optical, UV, and X-ray monitoring of the short orbital period black hole X-ray binary candidate Swift J1753.5-0127, focusing on the final stages of its 12 yr long outburst that started in 2005. From 2016 September ...

Broadband X-ray observations of four gamma-ray narrow-line Seyfert 1 galaxies

Braito V; Chen S; Pogge RW; Mathur S; Berton M; Piconcelli E; Foschini L

Narrow-line Seyfert 1 galaxies (NLS1s) is one of the few classes of active galactic nuclei harboring powerful relativistic jets and detected in gamma-rays. NLS1s are well-known X-ray sources. While in non-jetted sources ...

SN 2018bsz: significant dust formation in a nearby superluminous supernova

Leloudas G.; Matsuura M.; Li C. -J.; Maguire K.; Young D. R.; Jerkstrand A.; Gonzalez-Gaitan S.; Roy R. Ruiter A. J.; Schulze S.; Rau A.; Tartaglia L.; Inserra C.; Wesson R.; Mueller-Bravo T. E.; Anderson J. P.; Brennan S. J.; Gromadzki M.; Seitenzahl I.; Galbany L.; Kankare E.; Schweyer T.; Gal-Yam A.; Kuncarayakti H.; Kotak R.; Kravtsov T.; Schady P.; Yang S.; Sollerman J.; Kool E. C.; Pignata G.; Pursiainen M.; Chen T. -W.; Baade D.; Hsiao E. Y.; Paraskeva E.; Pessi P. J.; Mazzali P. A.; Wang L.; Carini R.; Nicholl M.; Fraser M.; Gutierrez C. P.; Yates R. M.

<p>We investigate the thermal emission and extinction from dust associated with the nearby superluminous supernova (SLSN) 2018bsz. Our dataset has daily cadence and simultaneous optical and near-infrared coverage up to ~ ...

Discovery of optical and infrared accretion disc wind signatures in the black hole candidate MAXI J1348-630

Ponti G.; Jiménez-Ibarra F.; Cúneo V. A.; Fender R. P.; Koljonen Karri I. I.; Casares J.; Panizo-Espinar G.; Armas Padilla M.; Sánchez-Sierras J.; Corral-Santana J.; Torres M. A. P.; Mata Sánchez D.; Steeghs D.; Muñoz-Darias T.

MAXI J1348-630 is a low mass X-ray binary discovered in 2019 during a bright outburst. During this event, the system experienced both hard and soft states following the standard evolution. We present multi-epoch optical ...

Estimation of the size and structure of the broad line region using Bayesian approach

Sagar Ram; Mathew Blesson; Rakshit Suvendu; Mandal Amit Kumar; Stalin CS; Petrov RG

Understanding the geometry and kinematics of the broad line region (BLR) of active galactic nuclei (AGN) is important to estimate black hole masses in AGN and study the accretion process. The technique of reverberation ...

Discovery of TeV gamma-ray emission from the neighbourhood of the supernova remnant G24.7+0.6 by MAGIC

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

SNR G24.7+0.6 is a 9.5 kyrs radio and gamma-ray supernova remnant evolving in a dense medium. In the GeV regime, SNR G24.7+0.6 (3FHL J1834.1-0706e/FGFS J1834.1-0706) shows a hard spectral index (Gamma similar to 2) up to ...

Luminous Type II Short-Plateau Supernovae 2006Y, 2006ai, and 2016egz: A Transitional Class from Stripped Massive Red Supergiants

Maguire Kate; Hosseinzadeh Griffin; Folatelli Gastón; Morrell Nidia; Gutíerrez Claudia P; Maeda Keiichi; Hiramatsu Daichi; Moriya Takashi J; Stritzinger Maximilian D; Phillips Mark M; Howell D Andrew; Arcavi Iair; Young David R; Suntzeff Nicholas B; Hsiao Eric Y; Fang Qiliang L; Burke Jamison; Anderson Joseph P; Galbany Lluís; Goldberg Jared A; Müller-Bravo Tomás E; Valenti Stefano; Gromadzki Mariuz; McCully Curtis

The diversity of Type II supernovae (SNe II) is thought to be driven mainly by differences in their progenitor's hydrogen-rich (H-rich) envelope mass, with SNe IIP having long plateaus (similar to 100 days) and the most ...

Rapid spectral transition of the black hole binary V404 Cygni

A. Veledina; J. Alfonso-Garzón; C. Sánchez-Fernández; S. E. Motta; J. J. E. Kajava

During the June 2015 outburst of the black hole binary V404 Cyg, rapid changes in the X-ray brightness and spectra were common. The INTEGRAL monitoring campaign detected spectacular Eddington-limited X-ray flares, but also ...

Discovery, observations, and modelling of a new eclipsing polar: MASTER OT J061451.70-272535.5

Motsoaledi M; Woudt PA; Breytenbach H; Potter SB; Hakala P; Lipunov V; Kniazev AY; Thorstensen JR; Buckley DAH; Tyurina N; Balanutsa P; Gorbovskoy E

We report the discovery of a new eclipsing polar, MASTER OT J061451.70-272535.5, detected as an optical transient by MASTER auto-detection software at the recently commissioned MASTER-SAAO telescope. Time resolved (10-20 ...

The Unanticipated Phenomenology of the Blazar PKS 2131-021: A Unique Supermassive Black Hole Binary Candidate

Vallisneri M; Prince TA; O'Dea CP; Hodges MW; Graham MJ; Tornikoski M; Readhead ACS; Blandford RD; de la Parra PV; Pearson TJ; Grainge KJB; Liodakis I; Cleary KA; Ravi V; Lister ML; Pavlidou V; Zensus JA; O'Neill S; Mroz P; Aller MF; Hovatta T; Lamb JW; Max-Moerbeck W; Lazio TJW; Lahteenmaki A; Kiehlmann S; Reeves RA

Most large galaxies host supermassive black holes in their nuclei and are subject to mergers, which can produce a supermassive black hole binary (SMBHB), and hence periodic signatures due to orbital motion. We report unique ...

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