INTEGRAL observations of the peculiar BeX System SAX J2103.5+4545

Bibcode
2004A&A...427..293B
DOI
10.1051/0004-6361:20041214
Blay, P.; Reig, P.; Martínez Núnez, S.; Camero, A.; Connell, P.; Reglero, V.
Referencia bibliográfica

Astronomy and Astrophysics, v.427, p.293-298 (2004)

Fecha de publicación:
11
2004
Revista
Astronomy and Astrophysics
Número de autores
6
Número de autores del IAC
0
Número de citas
16
Número de citas referidas
10
Descripción
We present an INTEGRAL data analysis of the X-ray transient SAX J2103.5+4545 during two outbursts detected in December 2002. The INTEGRAL coordinates and error circle agree with the position of the recently proposed optical counterpart. A power-law plus cut-off model provided a good fit to the 4-150 keV spectrum yielding a photon index of 1.0±0.1, a cut-off energy Ecut=7.6±2.0 keV and a folding energy Efold=30.9±2.5 keV. The X-ray luminosity in the 4-150 keV energy range was found to be 6.0× 1036 erg s-1, assuming a distance of 6.5 kpc. This luminosity, together with the derived photon index, indicate that the source is in a bright state. A 354.9±0.5 second pulse period is measured. This value is significantly smaller than previous measurements, indicating a long-term spin-up episode.
Tipo
Con árbitro
Acreción
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