Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/44744
Title: Candidate counterparts to the soft gamma-ray flare in the direction od LSI+61303
Author: Muñoz-Arjonilla, A. J.
Martí Ribas, Josep
Combi, J. A.
Luque-Escamilla, P. L.
Sánchez-Sutil, J. R.
Zabalza de Torres, Víctor
Paredes i Poy, Josep Maria
Keywords: Raigs X
Estels
Radioastronomia
Raigs gamma
Radiació infraroja
X-rays
Stars
Radio astronomy
Gamma rays
Infrared radiation
Issue Date: 2009
Publisher: Springer Verlag
Abstract: A short duration burst reminiscent of a soft gamma-ray repeater/anomalous X-ray pulsar behaviour was detected in the direction of LS I +61 303 by the Swift satellite. While the association with this well known gamma-ray binary is likely, a different origin cannot be excluded. Aims. We explore the error box of this unexpected flaring event and establish the radio, near-infrared and X-ray sources in our search for any peculiar alternative counterpart. Methods. We carried out a combined analysis of archive Very Large Array radio data of LS I +61 303 sensitive to both compact and extended emission. We also reanalysed previous near infrared observations with the 3.5 m telescope of the Centro Astronómico Hispano Alemán and X-ray observations with the Chandra satellite. Results. Our deep radio maps of the LS I +61 303 environment represent a significant advancement on previous work and 16 compact radio sources in the LS I +61 303 vicinity are detected. For some detections, we also identify near infrared and X-ray counterparts. Extended emission features in the field are also detected and confirmed. The possible connection of some of these sources with the observed flaring event is considered. Based on these data, we are unable to claim a clear association between the Swift-BAT flare and any of the sources reported here. However, this study represents the most sophisticated attempt to determine possible alternative counterparts other than LS I +61 303.
Note: Versió postprint del document publicat a: http://dx.doi.org/10.1051/0004-6361/200811407
It is part of: Astronomy and Astrophysics, 2009, vol. 497, num. 2, p. 457-461
Related resource: http://dx.doi.org/10.1051/0004-6361/200811407
URI: http://hdl.handle.net/2445/44744
ISSN: 0004-6361
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

Files in This Item:
File Description SizeFormat 
567370.pdf592.93 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.