Related papers: Activity from Magnetar Candidate 4U 0142+61: Burst…

RXTE Monitoring of the Anomalous X-ray Pulsar 1E 1048.1-5937

We report on long-term monitoring of the anomalous X-ray pulsar 1E 1048.1-5937 using the Rossi X-ray Timing Explorer. This pulsar's timing behavior is different from that of other AXPs. In particular, the pulsar shows significant deviations…

Astrophysics · Physics 2009-11-06 V. M. Kaspi , F. P. Gavriil , D. Chakrabarty , J. R. Lackey , M. P. Muno

Two-phase X-ray burst from GX 3+1 observed by INTEGRAL

INTEGRAL detected on August 31, 2004, an unusual thermonuclear X-ray burst from the low-mass X-ray binary GX 3+1. Its duration was 30 min, which is between the normal burst durations for this source (<~10 s) and the superburst observed in…

Astrophysics · Physics 2009-11-11 Jerome Chenevez , Maurizio Falanga , Soeren Brandt , Ruben Farinelli , Filippo Frontera , Andrea Goldwurm , Jean in 't Zand , Erik Kuulkers , Niels Lund

Timing and spectral properties of Be/Xray pulsar 4U 1901+03 during 2019 outburst

We have studied the timing and spectral properties of the BeXB 4U 1901+03 during the 2019 outburst using \textit{NuSTAR}, \textit{Swift}, and \textit{NICER} observations. Flares are in all observations and were of tens to hundreds of…

High Energy Astrophysical Phenomena · Physics 2021-09-08 Binay Rai , Bikash Chandra Paul

Search for Gravitational Wave Bursts from Six Magnetars

Soft gamma repeaters (SGRs) and anomalous X-ray pulsars (AXPs) are thought to be magnetars: neutron stars powered by extreme magnetic fields. These rare objects are characterized by repeated and sometimes spectacular gamma-ray bursts. The…

High Energy Astrophysical Phenomena · Physics 2019-08-15 J. Abadie , B. P. Abbott , R. Abbott , M. Abernathy , T. Accadia , F. Acerneseac , C. Adams , R. Adhikari , C. Affeldt , B. Allen , G. S. Allen , E. Amador Ceron , D. Amariutei , R. S. Amin , S. B. Anderson , W. G. Anderson , F. Antonuccia , K. Arai , M. A. Arain , M. C. Araya , S. M. Aston , P. Astonea , D. Atkinson , P. Aufmuth , C. Aulbert , B. E. Aylott , S. Babak , P. Baker , G. Ballardin , S. Ballmer , D. Barker , S. Barnum , F. Baroneac , B. Barr , P. Barriga , L. Barsotti , M. Barsuglia , M. A. Barton , I. Bartos , R. Bassiri , M. Bastarrika , A. Bastiab , J. Bauchrowitz , Th. S. Bauera , B. Behnke , M. G. Bekera , A. S. Bell , A. Belletoile , I. Belopolski , M. Benacquista , A. Bertolini , J. Betzwieser , N. Beveridge , P. T. Beyersdorf , I. A. Bilenko , G. Billingsley , J. Birch , S. Birindellia , R. Biswas , M. Bitossia , M. A. Bizouarda , E. Black , J. K. Blackburn , L. Blackburn , D. Blair , B. Bland , M. Bloma , O. Bock , T. P. Bodiya , C. Bogan , R. Bondarescu , F. Bondub , L. Bonelliab , R. Bonnand , R. Bork , M. Born , V. Boschia , S. Bose , L. Bosia , B. Bouhou , M. Boyle , S. Braccinia , C. Bradaschiaa , P. R. Brady , V. B. Braginsky , J. E. Brau , J. Breyer , D. O. Bridges , A. Brilleta , M. Brinkmann , V. Brissona , M. Britzger , A. F. Brooks , D. A. Brown , A. Brummit , R. Budzyńskib , T. Bulikbc , H. J. Bultenab , A. Buonanno , J. Burguet--Castell , O. Burmeister , D. Buskulic , C. Buy , R. L. Byer , L. Cadonati , G. Cagnolia , J. Cain , E. Calloniab , J. B. Camp , E. Campagnaab , P. Campsie , J. Cannizzo , K. Cannon , B. Canuel , J. Cao , C. Capano , F. Carbognani , S. Caride , S. Caudill , M. Cavaglià , F. Cavaliera , R. Cavalieri , G. Cellaa , C. Cepeda , E. Cesarinib , O. Chaibia , T. Chalermsongsak , E. Chalkley , P. Charlton , E. Chassande-Mottin , S. Chelkowski , Y. Chen , A. Chincarini , N. Christensen , S. S. Y. Chua , C. T. Y. Chung , S. Chung , F. Clara , D. Clark , J. Clark , J. H. Clayton , F. Clevaa , E. Cocciaab , C. N. Colacinoab , J. Colas , A. Collaab , M. Colombinib , R. Conte , D. Cook , T. R. Corbitt , N. Cornish , A. Corsia , C. A. Costa , M. Coughlin , J. -P. Coulona , D. M. Coward , D. C. Coyne , J. D. E. Creighton , T. D. Creighton , A. M. Cruise , R. M. Culter , A. Cumming , L. Cunningham , E. Cuoco , K. Dahl , S. L. Danilishin , R. Dannenberg , S. D'Antonioa , K. Danzmann , K. Das , V. Dattilo , B. Daudert , H. Daveloza , M. Daviera , G. Davies , E. J. Daw , R. Day , T. Dayanga , R. De Rosaab , D. DeBra , G. Debreczeni , J. Degallaix , M. del Preteac , T. Dent , V. Dergachev , R. DeRosa , R. DeSalvo , S. Dhurandhar , L. Di Fiorea , A. Di Lietoab , I. Di Palma , M. Di Paolo Emilioac , A. Di Virgilioa , M. Díaz , A. Dietz , F. Donovan , K. L. Dooley , S. Dorsher , E. S. D. Douglas , M. Dragocd , R. W. P. Drever , J. C. Driggers , J. -C. Dumas , S. Dwyer , T. Eberle , M. Edgar , M. Edwards , A. Effler , P. Ehrens , R. Engel , T. Etzel , M. Evans , T. Evans , M. Factourovich , V. Fafoneab , S. Fairhurst , Y. Fan , B. F. Farr , D. Fazi , H. Fehrmann , D. Feldbaum , I. Ferranteab , F. Fidecaroab , L. S. Finn , I. Fiori , R. Flaminio , M. Flanigan , S. Foley , E. Forsi , L. A. Fortea , N. Fotopoulos , J. -D. Fourniera , J. Franc , S. Frascaab , F. Frasconia , M. Frede , M. Frei , Z. Frei , A. Freise , R. Frey , T. T. Fricke , D. Friedrich , P. Fritschel , V. V. Frolov , P. Fulda , M. Fyffe , M. Galimberti , L. Gammaitoniab , J. Garcia , J. A. Garofoli , F. Garufiab , M. E. Gáspár , G. Gemme , E. Genin , A. Gennaia , S. Ghosh , J. A. Giaime , S. Giampanis , K. D. Giardina , A. Giazottoa , C. Gill , E. Goetz , L. M. Goggin , G. González , M. L. Gorodetsky , S. Goßler , R. Gouaty , C. Graef , M. Granata , A. Grant , S. Gras , C. Gray , R. J. S. Greenhalgh , A. M. Gretarsson , C. Greveriea , R. Grosso , H. Grote , S. Grunewald , G. M. Guidiab , C. Guido , R. Gupta , E. K. Gustafson , R. Gustafson , B. Hage , J. M. Hallam , D. Hammer , G. Hammond , J. Hanks , C. Hanna , J. Hanson , J. Harms , G. M. Harry , I. W. Harry , E. D. Harstad , M. T. Hartman , K. Haughian , K. Hayama , J. -F. Hayaub , T. Hayler , J. Heefner , H. Heitmann , P. Helloa , M. A. Hendry , I. S. Heng , A. W. Heptonstall , V. Herrera , M. Hewitson , S. Hild , D. Hoak , K. A. Hodge , K. Holt , T. Hong , S. Hooper , D. J. Hosken , J. Hough , E. J. Howell , D. Huet , B. Hughey , S. Husa , S. H. Huttner , D. R. Ingram , R. Inta , T. Isogai , A. Ivanov , P. Jaranowskid , W. W. Johnson , D. I. Jones , G. Jones , R. Jones , L. Ju , P. Kalmus , V. Kalogera , S. Kandhasamy , J. B. Kanner , E. Katsavounidis , W. Katzman , K. Kawabe , S. Kawamura , F. Kawazoe , W. Kells , M. Kelner , D. G. Keppel , A. Khalaidovski , F. Y. Khalili , E. A. Khazanov , H. Kim , N. Kim , P. J. King , D. L. Kinzel , J. S. Kissel , S. Klimenko , V. Kondrashov , R. Kopparapu , S. Koranda , W. Z. Korth , I. Kowalskab , D. Kozak , V. Kringel , S. Krishnamurthy , B. Krishnan , A. Królakae , G. Kuehn , R. Kumar , P. Kwee , M. Landry , B. Lantz , N. Lastzka , A. Lazzarini , P. Leaci , J. Leong , I. Leonor , N. Leroya , N. Letendre , J. Li , T. G. F. Lia , N. Liguoriab , P. E. Lindquist , N. A. Lockerbie , D. Lodhia , M. Lorenzinia , V. Lorietteb , M. Lormand , G. Losurdoa , P. Lu , J. Luan , M. Lubinski , H. Lück , A. P. Lundgren , E. Macdonald , B. Machenschalk , M. MacInnis , M. Mageswaran , K. Mailand , E. Majoranaa , I. Maksimovicb , N. Mana , I. Mandel , V. Mandic , M. Mantovaniac , A. Marandi , F. Marchesonia , F. Marion , S. Márka , Z. Márka , E. Maros , J. Marque , F. Martelliab , I. W. Martin , R. M. Martin , J. N. Marx , K. Mason , A. Masserot , F. Matichard , L. Matone , R. A. Matzner , N. Mavalvala , R. McCarthy , D. E. McClelland , S. C. McGuire , G. McIntyre , D. J. A. McKechan , G. Meadors , M. Mehmet , T. Meier , A. Melatos , A. C. Melissinos , G. Mendell , R. A. Mercer , L. Merill , S. Meshkov , C. Messenger , M. S. Meyer , H. Miao , C. Michel , L. Milanoab , J. Miller , Y. Minenkova , Y. Mino , V. P. Mitrofanov , G. Mitselmakher , R. Mittleman , O. Miyakawa , B. Moe , P. Moesta , M. Mohan , S. D. Mohanty , S. R. P. Mohapatra , D. Moraru , G. Moreno , N. Morgado , A. Morgiaab , S. Moscaab , V. Moscatellia , K. Mossavi , B. Mours , C. M. Mow--Lowry , G. Mueller , S. Mukherjee , A. Mullavey , H. Müller-Ebhardt , J. Munch , P. G. Murray , T. Nash , R. Nawrodt , J. Nelson , I. Neriab , G. Newton , E. Nishida , A. Nishizawa , F. Nocera , D. Nolting , E. Ochsner , J. O'Dell , G. H. Ogin , R. G. Oldenburg , B. O'Reilly , R. O'Shaughnessy , C. Osthelder , C. D. Ott , D. J. Ottaway , R. S. Ottens , H. Overmier , B. J. Owen , A. Page , G. Pagliaroliac , L. Palladinoac , C. Palombaa , Y. Pan , C. Pankow , F. Paolettia , M. A. Papa , A. Parameswaran , S. Pardiab , M. Parisiab , A. Pasqualetti , R. Passaquietiab , D. Passuelloa , P. Patel , D. Pathak , M. Pedraza , L. Pekowsky , S. Penn , C. Peralta , A. Perreca , G. Persichettiab , M. Phelps , M. Pichota , M. Pickenpack , F. Piergiovanniab , M. Pietkad , L. Pinard , I. M. Pinto , M. Pitkin , H. J. Pletsch , M. V. Plissi , J. Podkaminer , R. Poggianiab , J. Pöld , F. Postiglione , M. Prato , V. Predoi , L. R. Price , M. Prijatelj , M. Principe , S. Privitera , R. Prix , G. A. Prodiab , L. Prokhorov , O. Puncken , M. Punturoa , P. Puppoa , V. Quetschke , F. J. Raab , D. S. Rabelingab , I. Rácz , H. Radkins , P. Raffai , M. Rakhmanov , C. R. Ramet , B. Rankins , P. Rapagnaniab , V. Raymond , V. Reab , K. Redwine , C. M. Reed , T. Reed , T. Regimbaua , S. Reid , D. H. Reitze , F. Ricciab , R. Riesen , K. Riles , P. Roberts , N. A. Robertson , F. Robineta , C. Robinson , E. L. Robinson , A. Rocchia , S. Roddy , L. Rolland , J. Rollins , J. D. Romano , R. Romanoac , J. H. Romie , D. Rosińskacf , C. Röver , S. Rowan , A. Rüdiger , P. Ruggi , K. Ryan , S. Sakata , M. Sakosky , F. Salemi , M. Salit , L. Sammut , L. Sancho de la Jordana , V. Sandberg , V. Sannibale , L. Santamaría , I. Santiago-Prieto , G. Santostasi , S. Saraf , B. Sassolas , B. S. Sathyaprakash , S. Sato , M. Satterthwaite , P. R. Saulson , R. Savage , R. Schilling , S. Schlamminger , R. Schnabel , R. M. S. Schofield , B. Schulz , B. F. Schutz , P. Schwinberg , J. Scott , S. M. Scott , A. C. Searle , F. Seifert , D. Sellers , A. S. Sengupta , D. Sentenac , A. Sergeev , D. A. Shaddock , M. Shaltev , B. Shapiro , P. Shawhan , T. Shihan Weerathunga , D. H. Shoemaker , A. Sibley , X. Siemens , D. Sigg , A. Singer , L. Singer , A. M. Sintes , G. Skelton , B. J. J. Slagmolen , J. Slutsky , J. R. Smith , M. R. Smith , N. D. Smith , R. Smith , K. Somiya , B. Sorazu , J. Soto , F. C. Speirits , L. Sperandioab , M. Stefszky , A. J. Stein , J. Steinlechner , S. Steinlechner , S. Steplewski , A. Stochino , R. Stone , K. A. Strain , S. Strigin , A. S. Stroeer , R. Sturaniab , A. L. Stuver , T. Z. Summerscales , M. Sung , S. Susmithan , P. J. Sutton , B. Swinkels , G. P. Szokoly , M. Tacca , D. Talukder , D. B. Tanner , S. P. Tarabrin , J. R. Taylor , R. Taylor , P. Thomas , K. A. Thorne , K. S. Thorne , E. Thrane , A. Thüring , C. Titsler , K. V. Tokmakov , A. Toncelliab , M. Tonelliab , O. Torreac , C. Torres , C. I. Torrie , E. Tournefier , F. Travassoab , G. Traylor , M. Trias , K. Tseng , L. Turner , D. Ugolini , K. Urbanek , H. Vahlbruch , B. Vaishnav , G. Vajenteab , M. Vallisneri , J. F. J. van den Brandab , C. Van Den Broeck , S. van der Puttena , M. V. van der Sluys , A. A. van Veggel , S. Vass , M. Vasuth , R. Vaulin , M. Vavoulidisa , A. Vecchio , G. Vedovatoc , J. Veitch , P. J. Veitch , C. Veltkamp , D. Verkindt , F. Vetranoab , A. Viceréab , A. E. Villar , J. -Y. Vineta , H. Voccaa , C. Vorvick , S. P. Vyachanin , S. J. Waldman , L. Wallace , A. Wanner , R. L. Ward , M. Wasa , P. Wei , M. Weinert , A. J. Weinstein , R. Weiss , L. Wen , S. Wen , P. Wessels , M. West , T. Westphal , K. Wette , J. T. Whelan , S. E. Whitcomb , D. White , B. F. Whiting , C. Wilkinson , P. A. Willems , H. R. Williams , L. Williams , B. Willke , L. Winkelmann , W. Winkler , C. C. Wipf , A. G. Wiseman , G. Woan , R. Wooley , J. Worden , J. Yablon , I. Yakushin , H. Yamamoto , K. Yamamoto , H. Yang , D. Yeaton-Massey , S. Yoshida , P. Yu , M. Yvert , M. Zanolin , L. Zhang , Z. Zhang , C. Zhao , N. Zotov , M. E. Zucker , J. Zweizig , R. L. Aptekar , W. V. Boynton , M. S. Briggs , T. L. Cline , V. Connaughton , D. D. Frederiks , N. Gehrels , J. O Goldsten , D. Golovin , A. J. van der Horst , K. C. Hurley , Y. Kaneko , A. von Kienlin , C. Kouveliotou , H. A. Krimm , L. Lin , I. Mitrofanov , M. Ohno , V. D. Palshin , A. Rau , A. Sanin , M. S. Tashiro , Y. Terada , K. Yamaoka

Type I X-ray bursts and burst oscillations in the accreting millisecond X-ray pulsar IGR J17511-3057

We report the discovery of burst oscillations at the spin frequency in ten thermonuclear bursts from the accreting millisecond X-ray pulsar (AMXP) IGR J17511-3057. The burst oscillation properties are, like those from the persistent AMXPs…

High Energy Astrophysical Phenomena · Physics 2015-05-19 D. Altamirano , A. Watts , M. Linares , C. B. Markwardt , T. Strohmayer , A. Patruno

The X-ray reactivation of the radio bursting magnetar SGR 1935+2154

A few years after its discovery as a magnetar, SGR J1935+2154 started a new burst-active phase on 2020 April 27, accompanied by a large enhancement of its X-ray persistent emission. Radio single bursts were detected during this activation,…

High Energy Astrophysical Phenomena · Physics 2020-10-14 A. Borghese , F. Coti Zelati , N. Rea , P. Esposito , G. L. Israel , S. Mereghetti , A. Tiengo

Pulsed {\gamma}-ray emission from magnetar 1E 2259+586

Anomalous x-ray pulsars (AXPs) are thought to be magnetars which are young isolated neutron stars with extremely strong magnetic fields of > 10^14Gauss. Their tremendous magnetic fields inferred from the spin parameters provide a huge…

High Energy Astrophysical Phenomena · Physics 2015-06-11 J. H. K. Wu , C. Y. Hui , R. H. H. Huang , A. K. H. Kong , K. S. Cheng , J. Takata , P. H. T. Tam , E. M. H. Wu , C. -Y. Liu

Soft and Hard X-Ray Emissions from the Anomalous X-ray Pulsar 4U 0142+61 Observed with Suzaku

The anomalous X-ray pulsar 4U 0142+61 was observed with Suzaku on 2007 August 15 for a net exposure of -100 ks, and was detected in a 0.4 to ~70 keV energy band. The intrinsic pulse period was determined as 8.68878 \pm 0.00005 s, in…

High Energy Astrophysical Phenomena · Physics 2015-05-27 Teruaki Enoto , Kazuo Makishima , Kazuhiro Nakazawa , Motohide Kokubun , Madoka Kawaharada , Jun'ichi Kotoku , Noriaki Shibazaki

An accretion model for the anomalous X-ray pulsar 4U 0142+61

We propose that the quiescent emission of AXPs/SGRs is powered by accretion from a fallback disk, requiring magnetic dipole fields in the range 10^{12}-10^{13} G, and that the luminous hard tails of their X-ray spectra are produced by…

High Energy Astrophysical Phenomena · Physics 2015-06-12 J. E. Truemper , K. Dennerl , N. D. Kylafis , Ü. Ertan , A. Zezas

A Giant Outburst from SGR 1900+14 Observed with the BeppoSAX Gamma Ray Burst Monitor

We report the detection by the Gamma Ray Burst Monitor onboard BeppoSAX of the strongest and longest ever detected outburst from SGR 1900+14. Oscillations are detectable with a period of ~5.16 s for the entire duration of the event ~300 s.…

Astrophysics · Physics 2009-10-31 M. Feroci , F. Frontera , E. Costa , L. Amati , M. Tavani , M. Rapisarda , M. Orlandini

Spectral and temporal changes associated with flux enhancement in 4U 1626-67

4U 1626-67 is an accretion powered X-ray pulsar that shows remarkably stable X-ray luminosity above hours timescale and gradual intensity variation on a few years timescale. Here we report a significant increase in the X-ray intensity in…

High Energy Astrophysical Phenomena · Physics 2015-05-13 Chetana Jain , Biswajit Paul , Anjan Dutta

A search for pulsed radio emission from anomalous X-ray pulsar 4U 0142+61 at the frequency of 111 MHz

We have searched for pulsed radio emission from magnetar 4U 0142+61 at the frequency of 111 MHz. No pulsed signal was detected from this source. Upper limits for mean flux density are 0.9 - 9 mJy depending on assumed duty cycle (.05 - .5)…

Astrophysics · Physics 2007-10-12 Alexander A. Ershov , Yurii P. Shitov

INTEGRAL/IBIS observations of a hard X-ray outburst in high mass X-ray binary 4U 2206+54

U 2206+54 is a wind-fed high mass X-ray binary with a main-sequence donor star. The nature of its compact object was recently identified as a slow-pulsation magnetized neutron star. INTEGRAL/IBIS observations have a long-term hard X-ray…

High Energy Astrophysical Phenomena · Physics 2015-05-19 W. Wang

RXTE Observations of Anomalous X-ray Pulsar 1E 1547.0-5408 During and After its 2008 and 2009 Outbursts

We present the results of Rossi X-ray Timing Explorer (RXTE) and Swift monitoring observations of the magnetar 1E 1547.0-5408 following the pulsar's radiative outbursts in 2008 October and 2009 January. We report on a study of the evolution…

Solar and Stellar Astrophysics · Physics 2015-06-03 Rim Dib , Victoria M. Kaspi , Paul Scholz , Fotis P. Gavriil

SRG/ART-XC discovery of SRGAJ144459.2-604207: a well-tempered bursting accreting millisecond X-ray pulsar

We report on the discovery of the new accreting millisecond X-ray pulsar SRGAJ144459.2-604207 using the SRG/ART-XC data. The source was observed twice in February 2024 during the declining phase of the outburst. Timing analysis revealed a…

High Energy Astrophysical Phenomena · Physics 2024-10-23 S. V. Molkov , A. A. Lutovinov , S. S. Tsygankov , V. F. Suleimanov , J. Poutanen , I. Yu. Lapshov , I. A. Mereminskiy , A. N. Semena , V. A. Arefiev , A. Yu. Tkachenko

The Anomalous X-ray Pulsars

The Anomalous X-ray Pulsars (AXPs) are a small class of pulsars with spin periods in the 6-12 s range, very soft X-ray spectra, secular spin down on time scales of ~10^3-10^5 years, and lack of bright optical counterparts. Two, possibly…

Astrophysics · Physics 2007-05-23 S. Mereghetti , L. Chiarlone , G. L. Israel , L. Stella

The Peculiar Behavior of Burst Oscillations in the Accreting Millisecond X-ray Pulsar XTE J1814-338

Accreting millisecond X-ray pulsars (AMXPs) show burst oscillations during thermonuclear explosions of the accreted plasma which are markedly different from those observed in non-pulsating low mass X-ray binaries. The AMXP XTE J1814-338 is…

High Energy Astrophysical Phenomena · Physics 2021-12-15 Yuri Cavecchi , Alessandro Patruno

Tracing the outburst decay of soft X-ray transients Aql X-1 and 4U 1608-52 with XSPECT

XSPECT instrument on-board XPoSat mission is a soft X-ray spectrometer sensitive in the energy band 0.8$-$15 keV. XSPECT has observed several bright neutron star low mass X-ray binaries since launch. Two well known sources, Aql X-1 and 4U…

High Energy Astrophysical Phenomena · Physics 2026-05-18 Rwitika Chatterjee , Vivek Kumar Agrawal , V. P. Shyam Prakash , Koushal Vadodariya , Radhakrishna V

Discovery of slow X-ray pulsations in the high-mass X-ray binary 4U 2206+54

The source 4U 2206+54 is one of the most enigmatic high-mass X-ray binaries. In spite of intensive searches, X-ray pulsations have not been detected in the time range 0.001-1000 s. A cyclotron line at ~30 keV has been suggested by various…

Astrophysics · Physics 2009-11-13 P. Reig , J. M Torrejon , I. Negueruela , P. Blay , M. Ribo , J. Wilms

Suzaku Observation of AXP 1E 1841-045 in SNR Kes 73

Anomalous X-ray pulsars (AXPs) are thought to be magnetars, which are neutron stars with ultra strong magnetic field of $10^{14}$-- $10^{15}$ G. Their energy spectra below $\sim$10 keV are modeled well by two components consisting of a…

Astrophysics · Physics 2009-06-23 M. Morii , S. Kitamoto , N. Shibazaki , D. Takei , N. Kawai , M. Arimoto , M. Ueno , Y. Terada , T. Kohmura , S. Yamauchi