New outburst of A0535+26 observed with INTEGRAL, RXTE and Suzaku

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https://pos.sissa.it/096/063/

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https://doi.org/10.22323/1.096.0063
 http://hdl.handle.net/11603/29901

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UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
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UMBC Physics Department

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https://orcid.org/0000-0002-4656-6881

Date

2010-06-11

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conference papers and proceedings
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Citation of Original Publication

Caballero, Isabel, et al. “New Outburst of A0535+26 Observed with INTEGRAL, RXTE and Suzaku.” In Proceedings of The Extreme Sky: Sampling the Universe above 10 KeV — PoS(Extremesky2009), 96:063. SISSA Medialab, 2010. https://doi.org/10.22323/1.096.0063.

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Abstract

A normal outburst of the Be/X-ray binary system A0535+26 has taken place in August 2009. It is the fourth in a series of normal outbursts that have occured around the periastron passage of the source, but is unusual by starting at an earlier orbital phase and by presenting a peculiar double-peaked light curve. A first "flare" (lasting about 9 days from MJD 55043 on) reached a flux of 440 mCrab. The flux then decreased to less than 220 mCrab, and increased again reaching 440 mCrab around the periastron at MJD 55057. Target of Opportunity observations have been performed with INTEGRAL, RXTE and Suzaku. First results of these observations are presented, with special emphasis on the cyclotron lines present in the X-ray spectrum of the source, as well as in the pulse period and energy dependent pulse profiles of the source.