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Publication


Featured researches published by A. Patruno.


The Astrophysical Journal | 2010

The Return of the Bursts: Thermonuclear Flashes from Circinus X-1

M. Linares; Anna L. Watts; D. Altamirano; P. Soleri; N. Degenaar; Y.J. Yang; Rudy Wijnands; P. Casella; Jeroen Homan; Deepto Chakrabarty; N. Rea; M. Armas-Padilla; Y. Cavecchi; M. Kalamkar; R. Kaur; A. Patruno; M. van der Klis

We report the detection of 15 X-ray bursts with RXTE and Swift observations of the peculiar X-ray binary Circinus X-1 (Cir X-1) during its 2010 May X-ray re-brightening. These are the first X-ray bursts observed from the source after the initial discovery by Tennant and collaborators, 25 years ago. By studying their spectral evolution, we firmly identify nine of the bursts as type I (thermonuclear) X-ray bursts. We obtain an arcsecond location of the bursts that confirms once and for all the identification of Cir X-1 as a type I X-ray burst source, and therefore as a low magnetic field accreting neutron star. The first five bursts observed by RXTE are weak and show approximately symmetric light curves, without detectable signs of cooling along the burst decay. We discuss their possible nature. Finally, we explore a scenario to explain why Cir X-1 shows thermonuclear bursts now but not in the past, when it was extensively observed and accreting at a similar rate.


Archive | 2011

Discovery of 10 mHz quasi-periodic oscillations likely from IGR J17091-3624

D. Altamirano; M. Linares; Michiel van der Klis; Rudy Wijnands; M. Kalamkar; P. Casella; Anthony Watts; A. Patruno; M. Armas-Padilla; Y. Cavecchi; N. Degenaar; Ramanpreet Kaur; Yun Yang; N. Rea


Archive | 2011

SAX J1747.0-2853: 'normal' thermonuclear bursts resumed

M. Linares; D. Altamirano; Anthony Watts; Michiel van der Klis; Rudy Wijnands; A. Patruno; M. Armas-Padilla; Y. Cavecchi; N. Degenaar; M. Kalamkar; Ramanpreet Kaur; Yun Yang; P. Casella; N. Rea


The astronomer's telegram | 2010

Swift-XRT detects X-ray burst from Circinus X-1

M. Linares; P. Soleri; D. Altamirano; M. Armas-Padilla; Y. Cavecchi; N. Degenaar; M. Kalamkar; R. Kaur; M. van der Klis; A. Patruno; Anna L. Watts; Rudy Wijnands; Y.J. Yang; P. Casella; N. Rea; Deepto Chakrabarty; Jeroen Homan


The astronomer's telegram | 2010

Discovery of 0.19 Hz QPO in MAXI J1409-619

R. Kaur; P. Casella; M. Linares; D. Altamirano; A. Patruno; M. Armas-Padilla; Y. Cavecchi; N. Degenaar; D. Russell; M. Kalamkar; M. van der Klis; Anna L. Watts; Rudy Wijnands; N. Rea


The astronomer's telegram | 2010

Discovery of kilohertz QPOs in RXTE observations of SAX J1748.9-2021

D. Altamirano; A. Patruno; Anna L. Watts; M. Armas Padilla; Y. Cavecchi; N. Degenaar; M. Kalamkar; R. Kaur; P. Soleri; Y.J. Yang; M. van der Klis; Rudy Wijnands; P. Casella; M. Linares; N. Rea


The astronomer's telegram | 2010

New outburst of the accreting-millisecond X-ray pulsar NGC 6440 X-2

D. Altamirano; A. Patruno; C.O. Heinke; M. Linares; Craig B. Markwardt; Tod E. Strohmayer


The astronomer's telegram | 2010

MAXI J1659-152 is a BH candidate

M. Kalamkar; Y.J. Yang; D. Altamirano; P. Casella; M. Linares; A. Patruno; M. Armas-Padilla; Y. Cavecchi; N. Degenaar; D. Russell; R. Kaur; M. van der Klis; Anna L. Watts; Rudy Wijnands; N. Rea


The astronomer's telegram | 2010

RXTE detects X-ray bursts from Circinus X-1

M. Linares; P. Soleri; Anna L. Watts; D. Altamirano; M. Armas-Padilla; Y. Cavecchi; N. Degenaar; M. Kalamkar; R. Kaur; M. van der Klis; A. Patruno; Rudy Wijnands; Y.J. Yang; P. Casella; N. Rea


The astronomer's telegram | 2010

SWIFT J1749.4-2807

Y.J. Yang; D.M. Russell; Rudy Wijnands; M. van der Klis; D. Altamirano; A. Patruno; Anna L. Watts; M. Armas Padilla; Y. Cavecchi; N. Degenaar; M. Kalamkar; R. Kaur; M. Linares; P. Casella; N. Rea; P. Soleri; Frederick D. Lewis; Albert K. H. Kong

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D. Altamirano

University of Southampton

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M. Linares

Polytechnic University of Catalonia

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M. Kalamkar

University of Amsterdam

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N. Degenaar

University of Amsterdam

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N. Rea

University of Amsterdam

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Y. Cavecchi

University of Amsterdam

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M. van der Klis

European Space Research and Technology Centre

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