Related papers: A superburst from GX 3+1

Detection of a huge explosion in the early Universe

Gamma-ray Bursts (GRBs) are bright flashes of high energy photons that can last from about 10 milliseconds to 10 minutes. Their origin and nature have puzzled the scientific community for about 25 years until 1997, when the first X-ray…

Astrophysics · Physics 2009-11-11 G. Cusumano , V. Mangano , G. Chincarini , A. Panaitescu , D. N. Burrows , V. La Parola , T. Sakamoto , S. Campana , T. Mineo , G. Tagliaferri , L. Angelini , S. D. Barthelemy , A. P. Beardmore , P. T. Boyd , L. Cominsky , C. Gronwall , E. E. Fenimore , N. Gehrels , P. Giommi , M. Goad , K. Hurley , J. A. Kennea , K. O. Mason , F. Marshall , P. Meszaros , J. A. Nousek , J. P. Osborne , D. M. Palmer , P. W. A. Roming , A. Wells , N. E. White , B. Zhang

A Possible Period for the K-band Brightening Episodes of GX 17+2

The low mass X-ray binary and Z source GX 17+2 undergoes infrared K-band brightening episodes of at least 3.5 magnitudes. The source of these episodes is not known. Prior published K-band magnitudes and new K-band measurements acquired…

Solar and Stellar Astrophysics · Physics 2015-05-13 Jillian Bornak , Bernard J McNamara , Thomas E Harrison , Michael P Rupen , Reba M Bandyopadhyay , Stefanie Wachter

Swift observations of GRB050712

We present the results of X-ray and optical observations of GRB050712 performed by Swift. The X-ray lightcurve of this burst exhibits episodes of flares in the first 1000s, the same epoch at which the UVOT detected an optical counterpart. A…

Astrophysics · Physics 2010-03-19 M. De Pasquale , D. Grupe , T. S. Poole , A. A. Breeveld , S. Zane , S. R. Rosen , M. J. Page , K. O. Mason , D. N. Burrows , H. A. Krimm. , N. Gehrels , J. A. Nousek , P. W. A. Roming , S. Kobayashi , B. Zhang

The Discovery of an Outburst and Pulsed X-ray Flux from SMC X-2 from RXTE Observations

Rossi X-ray Timing Explorer All Sky Monitor observations of SMC X-2 show that the source experienced an outburst in January to April 2000 reaching a peak luminosity of greater than ~10^38 ergs s^-1. RXTE Proportional Counter Array…

Astrophysics · Physics 2009-10-31 R. H. D. Corbet , F. E. Marshall , M. J. Coe , S. Laycock , G. Handler

Chandra-HETGS Observations of the Brightest Flare Seen from Sgr A*

Starting in 2012, we began an unprecedented observational program focused on the supermassive black hole in the center of our Galaxy, Sgr A*, utilizing the High Energy Transmission Gratings Spectrometer (HETGS) instrument on the Chandra…

High Energy Astrophysical Phenomena · Physics 2015-06-11 M. A. Nowak , J. Neilsen , S. B. Markoff , F. K. Baganoff , D. Porquet , N. Grosso , Y. Levin , J. Houck , A. Eckart , H. Falcke , L. Ji , J. M. Miller , Q. D. Wang

Timing properties of the X-ray accreting pulsar RX J0440.9+4431 studied with Insight-HXMT and NICER

RX J0440.9+4431, a Be/X-ray binary, had its brightest outburst in 2022 since its discovery, with a peak X-ray flux of 2.25 Crab (as recorded by Swift/BAT, 15-50 keV). We analyze the timing properties of this giant outburst using data from…

High Energy Astrophysical Phenomena · Physics 2023-09-28 P. P. Li , L. Tao , Y. L. Tuo , M. Y. Ge , L. D. Kong , L. Zhang , Q. C. Bu , L. Ji , J. L. Qu , S. Zhang , S. N. Zhang , Y. Huang , X. Ma , W. T. Ye , Q. C. Zhao , R. C. Ma , S. J. Zhao , X. Hou , Z. X. Yang , P. J. Wang , S. M. Jia , Q. C. Shui , J. Guan

GRS 1915+105 : Flares, QPOs and other events at 15 GHz

Monitoring with the Ryle Telescope at 15 GHz of the Galactic X-ray transient source GRS 1915+105 has revealed a remarkable range of rapid and extended flares which appear to be related to the X-ray emission as recorded by the RXTE all-sky…

Astrophysics · Physics 2007-05-23 G. G. Pooley , R. P. Fender

A search for enhanced very high energy gamma-ray emission from the March 2013 Crab Nebula flare

In March 2013, a flaring episode from the Crab Nebula lasting ~2 weeks was detected by the Fermi-LAT (Large Area Telescope on board the Fermi Gamma-ray Space Telescope). VERITAS provides simultaneous observations throughout this period.…

High Energy Astrophysical Phenomena · Physics 2014-01-09 The VERITAS Collaboration , E. Aliu , S. Archambault , T. Aune , W. Benbow , K. Berger , R. Bird , A. Bouvier , J. H. Buckley , V. Bugaev , K. Byrum , M. Cerruti , X. Chen , L. Ciupik , M. P. Connolly , W. Cui , J. Dumm , M. Errando , A. Falcone , S. Federici , Q. Feng , J. P. Finley , P. Fortin , L. Fortson , A. Furniss , N. Galante , G. H. Gillanders , S. Griffin , S. T. Griffiths , J. Grube , G. Gyuk , D. Hanna , J. Holder , G. Hughes , T. B. Humensky , P. Kaaret , M. Kertzman , Y. Khassen , D. Kieda , F. Krennrich , S. Kumar , M. J. Lang , M. Lyutikov , G. Maier , S. McArthur , A. McCann , K. Meagher , J. Millis , P. Moriarty , R. Mukherjee , A. O'Faolain de Bhroithe , R. A. Ong , A. N. Otte , J. S. Perkins , M. Pohl , A. Popkow , J. Quinn , K. Ragan , J. Rajotte , L. C. Reyes , P. T. Reynolds , G. T. Richards , E. Roache , G. H. Sembroski , F. Sheidaei , A. W. Smith , D. Staszak , I. Telezhinsky , M. Theiling , J. V. Tucci , J. Tyler , A. Varlotta , S. P. Wakely , T. C. Weekes , A. Weinstein , R. Welsing , D. A. Williams , A. Zajczyk , B. Zitzer

Swift and Fermi observations of X-ray flares: the case of Late Internal Shock

Simultaneous Swift and Fermi observations of gamma-ray bursts (GRBs) offer a unique broadband view of their afterglow emission, spanning more than ten decades in energy. We present the sample of X-ray flares observed by both Swift and Fermi…

High Energy Astrophysical Phenomena · Physics 2015-06-23 E. Troja , L. Piro , V. Vasileiou , N. Omodei , J. M. Burgess , S. Cutini , V. Connaughton , J. E. McEnery

The X-ray afterglow of GRB030329

We report on XMM-Newton and Rossi-XTE observations of the bright (fluence $\sim$ 10$^{-4}$ erg cm$^{-2}$) and nearby (z=0.1685) Gamma-Ray Burst GRB030329 associated to SN2003dh. The first Rossi-XTE observation, 5 hours after the burst,…

Astrophysics · Physics 2009-11-07 A. Tiengo , S. Mereghetti , G. Ghisellini , E. Rossi , G. Ghirlanda , N. Schartel

H.E.S.S. Observations of the Crab during its March 2013 GeV Gamma-Ray Flare

Context. On March 4, 2013, the Fermi-LAT and AGILE reported a flare from the direction of the Crab Nebula in which the high-energy (HE; E > 100 MeV) flux was six times above its quiescent level. Simultaneous observations in other energy…

High Energy Astrophysical Phenomena · Physics 2014-02-20 H. E. S. S. Collaboration , A. Abramowski , F. Aharonian , F. Ait Benkhali , A. G. Akhperjanian , E. Angüner , G. Anton , S. Balenderan , A. Balzer , A. Barnacka , Y. Becherini , J. Becker Tjus , K. Bernlöhr , E. Birsin , E. Bissaldi , J. Biteau , M. Böttcher , C. Boisson , J. Bolmont , P. Bordas , J. Brucker , F. Brun , P. Brun , T. Bulik , S. Carrigan , S. Casanova , M. Cerruti , P. M. Chadwick , R. Chalme-Calvet , R. C. G. Chaves , A. Cheesebrough , M. Chrétien , S. Colafrancesco , G. Cologna , J. Conrad , C. Couturier , Y. Cui , M. Dalton , M. K. Daniel , I. D. Davids , B. Degrange , C. Deil , P. deWilt , H. J. Dickinson , A. Djannati-Ataï , W. Domainko , L. O'C. Drury , G. Dubus , K. Dutson , J. Dyks , M. Dyrda , T. Edwards , K. Egberts , P. Eger , P. Espigat , C. Farnier , S. Fegan , F. Feinstein , M. V. Fernandes , D. Fernandez , A. Fiasson , G. Fontaine , A. Förster , M. Füßling , M. Gajdus , Y. A. Gallant , T. Garrigoux , G. Giavitto , B. Giebels , J. F. Glicenstein , M. -H. Grondin , M. Grudzińska , S. Häffner , J. Hahn , J. Harris , G. Heinzelmann , G. Henri , G. Hermann , O. Hervet , A. Hillert , J. A. Hinton , W. Hofmann , P. Hofverberg , M. Holler , D. Horns , A. Jacholkowska , C. Jahn , M. Jamrozy , M. Janiak , F. Jankowsky , I. Jung , M. A. Kastendieck , K. Katarzyński , U. Katz , S. Kaufmann , B. Khélifi , M. Kieffer , S. Klepser , D. Klochkov , W. Kluźniak , T. Kneiske , D. Kolitzus , Nu. Komin , K. Kosack , S. Krakau , F. Krayzel , P. P. Krüger , H. Laffon , G. Lamanna , J. Lefaucheur , A. Lemière , M. Lemoine-Goumard , J. -P. Lenain , D. Lennarz , T. Lohse , A. Lopatin , C. -C. Lu , V. Marandon , A. Marcowith , R. Marx , G. Maurin , N. Maxted , M. Mayer , T. J. L. McComb , J. Méhault , P. J. Meintjes , U. Menzler , M. Meyer , R. Moderski , M. Mohamed , E. Moulin , T. Murach , C. L. Naumann , M. de Naurois , J. Niemiec , S. J. Nolan , L. Oakes , S. Ohm , E. de Oña Wilhelmi , B. Opitz , M. Ostrowski , I. Oya , M. Panter , R. D. Parsons , M. Paz Arribas , N. W. Pekeur , G. Pelletier , J. Perez , P. -O. Petrucci , B. Peyaud , S. Pita , H. Poon , G. Pühlhofer , M. Punch , A. Quirrenbach , S. Raab , M. Raue , A. Reimer , O. Reimer , M. Renaud , R. de los Reyes , F. Rieger , L. Rob , C. Romoli , S. Rosier-Lees , G. Rowell , B. Rudak , C. B. Rulten , V. Sahakian , D. A. Sanchez , A. Santangelo , R. Schlickeiser , F. Schüssler , A. Schulz , U. Schwanke , S. Schwarzburg , S. Schwemmer , H. Sol , G. Spengler , F. Spies , Ł. Stawarz , R. Steenkamp , C. Stegmann , F. Stinzing , K. Stycz , I. Sushch , A. Szostek , J. -P. Tavernet , T. Tavernier , A. M. Taylor , R. Terrier , M. Tluczykont , C. Trichard , K. Valerius , C. van Eldik , B. van Soelen , G. Vasileiadis , C. Venter , A. Viana , P. Vincent , H. J. Völk , F. Volpe , M. Vorster , T. Vuillaume , S. J. Wagner , P. Wagner , M. Ward , M. Weidinger , Q. Weitzel , R. White , A. Wierzcholska , P. Willmann , A. Wörnlein , D. Wouters , V. Zabalza , M. Zacharias , A. Zajczyk , A. A. Zdziarski , A. Zech , H. -S. Zechlin

The blob crashes into the mirror: modelling the exceptional gamma-ray flaring activity of 3C 454.3 in November 2010

We focus on the exceptional flaring activity of 3C 454.3 in November 2010 and we discuss a theoretical framework addressing all data in their overall evolution. For two weeks the source has shown a plateau of enhanced GeV emission preceding…

High Energy Astrophysical Phenomena · Physics 2014-09-17 V. Vittorini , M. Tavani , A. Cavaliere , E. Striani , S. Vercellone

SMC X-1 As An Intermediate-Stage Flaring X-ray Pulsar

We present Rossi X-ray Timing Explorer observations of the X-ray pulsar SMC X-1. The source is highly variable on short time scales (< 1 h), exhibiting apparent X-ray flares occupying a significant fraction (~3 %) of the total observing…

Astrophysics · Physics 2009-11-07 Dae-Sik Moon , Stephen S. Eikenberry , Ira M. Wasserman

BeppoSAX Wide Field Cameras observations of six type I X-ray bursters

We have discovered three certain (SAX J1324.5-6313, 2S 1711-339 and SAX J1828.5-1037) and two likely (SAX J1818.7+1424 and SAX J2224.9+5421) new thermonuclear X-ray burst sources with the BeppoSAX Wide Field Cameras, and observed a second…

Astrophysics · Physics 2009-11-07 R. Cornelisse , F. Verbunt , J. J. M. in 't Zand , E. Kuulkers , J. Heise , R. A. Remillard , M. Cocchi , L. Natalucci , A. Bazzano , P. Ubertini

Observed flux density enhancement at submillimeter wavelengths during an X-class flare

We analyse the 30 October, 2004, X1.2/SF solar event that occurred in AR 10691 (N13 W18) at around 11:44 UT. Observations at 212 and 405 GHz of the Solar Submillimeter Telescope (SST), with high time resolution (5 ms), show an intense…

Astrophysics · Physics 2008-11-26 G. Cristiani , C. G. Giménez de Castro , M. L. Luoni , C. H. Mandrini , M. G. Rovira , P. Kaufmann

A Fast Radio Burst discovered in FAST drift scan survey

We report the discovery of a highly dispersed fast radio burst, FRB~181123, from an analysis of $\sim$1500~hr of drift-scan survey data taken using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The pulse has three…

High Energy Astrophysical Phenomena · Physics 2020-05-27 Weiwei Zhu , Di Li , Rui Luo , Chenchen Miao , Bing Zhang , Laura Spitler , Duncan Lorimer , Michael Kramer , David Champion , Youling Yue , Andrew Cameron , Marilyn Cruces , Ran Duan , Yi Feng , Jun Han , George Hobbs , Chenhui Niu , Jiarui Niu , Zhichen Pan , Lei Qian , Dai Shi , Ningyu Tang , Pei Wang , Hongfeng Wang , Mao Yuan , Lei Zhang , Xinxin Zhang , Shuyun Cao , Li Feng , Hengqian Gan , Long Gao , Xuedong Gu , Minglei Guo , Qiaoli Hao , Lin Huang , Menglin Huang , Peng Jiang , Chengjin Jin , Hui Li , Qi Li , Qisheng Li , Hongfei Liu , Gaofeng Pan , Bo Peng , Hui Qian , Xiangwei Shi , Jinyuo Song , Liqiang Song , Caihong Sun , Jinghai Sun , Hong Wang , Qiming Wang , Yi Wang , Xiaoyao Xie , Jun Yan , Li Yang , Shimo Yang , Rui Yao , Dongjun Yu , Jinglong Yu , Chengmin Zhang , Haiyan Zhang , Shuxin Zhang , Xiaonian Zheng , Aiying Zhou , Boqin Zhu , Lichun Zhu , Ming Zhu , Wenbai Zhu , Yan Zhu

MAGIC observations of the microquasar V404 Cygni during the 2015 outburst

The microquasar V404 Cygni underwent a series of outbursts in 2015, June 15-31, during which its flux in hard X-rays (20-40 keV) reached about 40 times the Crab Nebula flux. Because of the exceptional interest of the flaring activity from…

High Energy Astrophysical Phenomena · Physics 2020-01-30 M. L. Ahnen , S. Ansoldi , L. A. Antonelli , C. Arcaro , A. Babić , B. Banerjee , P. Bangale , U. Barres de Almeida , J. A. Barrio , J. Becerra González , W. Bednarek , E. Bernardini , A. Berti , B. Biasuzzi , A. Biland , O. Blanch , S. Bonnefoy , G. Bonnoli , R. Carosi , A. Carosi , A. Chatterjee , P. Colin , E. Colombo , J. L. Contreras , J. Cortina , S. Covino , P. Cumani , P. Da Vela , F. Dazzi , A. De Angelis , B. De Lotto , E. de Oña Wilhelmi , F. Di Pierro , M. Doert , A. Domínguez , D. Dominis Prester , D. Dorner , M. Doro , S. Einecke , D. Eisenacher Glawion , D. Elsaesser , M. Engelkemeier , V. Fallah Ramazani , A. Fernández-Barral , D. Fidalgo , M. V. Fonseca , L. Font , C. Fruck , D. Galindo , R. J. García López , M. Garczarczyk , M. Gaug , P. Giammaria , N. Godinović , D. Gora , S. Griffiths , D. Guberman , D. Hadasch , A. Hahn , T. Hassan , M. Hayashida , J. Herrera , J. Hose , D. Hrupec , G. Hughes , K. Ishio , Y. Konno , H. Kubo , J. Kushida , D. Kuveždić , D. Lelas , E. Lindfors , S. Lombardi , F. Longo , M. López , C. Maggio , P. Majumdar , M. Makariev , G. Maneva , M. Manganaro , K. Mannheim , L. Maraschi , M. Mariotti , M. Martínez , D. Mazin , U. Menzel , M. Minev , R. Mirzoyan , A. Moralejo , V. Moreno , E. Moretti , V. Neustroev , A. Niedzwiecki , M. Nievas Rosillo , K. Nilsson , D. Ninci , K. Nishijima , K. Noda , L. Nogués , S. Paiano , J. Palacio , D. Paneque , R. Paoletti , J. M. Paredes , X. Paredes-Fortuny , G. Pedaletti , M. Peresano , L. Perri , M. Persic , P. G. Prada Moroni , E. Prandini , I. Puljak , J. R. Garcia , I. Reichardt , W. Rhode , M. Ribó , J. Rico , T. Saito , K. Satalecka , S. Schroeder , T. Schweizer , A. Sillanpää , J. Sitarek , I. Šnidarić , D. Sobczynska , A. Stamerra , M. Strzys , T. Surić , L. Takalo , F. Tavecchio , P. Temnikov , T. Terzić , D. Tescaro , M. Teshima , D. F. Torres , N. Torres-Albà , A. Treves , G. Vanzo , M. Vazquez Acosta , I. Vovk , J. E. Ward , M. Will , D. Zarić , A. Loh , J. Rodriguez

How Long does a Burst Burst?

Several gamma-ray bursts (GRBs) last much longer (~hours) in gamma-rays than typical long GRBs (~ minutes), and recently it was proposed that these "ultra-long GRBs" may form a distinct population, probably with a different (e.g. blue…

High Energy Astrophysical Phenomena · Physics 2017-06-06 Bin-Bin Zhang , Bing Zhang , Kohta Murase , Valerie Connaughton , Michael S. Briggs

Decameter Type III-Like Bursts

We report the first observations of Type III-like bursts at frequencies 10 30 MHz. More than 1000 such bursts during 2002 2004 have been analyzed. The frequency drift of these bursts is several times that of decameter Type III bursts. A…

Solar and Stellar Astrophysics · Physics 2018-02-22 V. N. Mel'Nik , A. A. Konovalenko , H. O. Rucker , B. P. Rutkevych , V. V. Dorovskyy , E. P. Abranin , A. I. Brazhenko , A. A. Stanislavskii , A. Lecacheux

Variable gamma-ray emission from the Crab Nebula: short flares and long "waves"

Gamma-ray emission from the Crab Nebula has been recently shown to be unsteady. In this paper, we study the flux and spectral variability of the Crab above 100 MeV on different timescales ranging from days to weeks. In addition to the four…

High Energy Astrophysical Phenomena · Physics 2013-02-19 E. Striani , M. Tavani , V. Vittorini , I. Donnarumma , A. Giuliani , G. Pucella , A. Argan , A. Bulgarelli , S. Colafrancesco , M. Cardillo , E. Costa , E. Del Monte , A. Ferrari , S. Mereghetti , L. Pacciani , A. Pellizzoni , G. Piano , C. Pittori , M. Rapisarda , S. Sabatini , P. Soffitta , M. Trifoglio , A. Trois , S. Vercellone , F. Verrecchia