2005A&A...440.1033S


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET01:59:12

2005A&A...440.1033S - Astronomy and Astrophysics, volume 440, 1033-1039 (2005/9-4)

A large spin-up rate measured with INTEGRAL in the high mass X-ray binary pulsar SAX J2103.5+4545.

SIDOLI L., MEREGHETTI S., LARSSON S., CHERNYAKOVA M., KREYKENBOHM I., KRETSCHMAR P., PAIZIS A., SANTANGELO A., FERRIGNO C. and FALANGA M.

Abstract (from CDS):

The High Mass X-ray Binary Pulsar SAX J2103.5+4545 has been observed with INTEGRAL several times during the last outburst in 2002-2004. We report a comprehensive study of all INTEGRAL observations, allowing a study of the pulse period evolution during the recent outburst. We measured a very rapid spin-up episode, lasting ∼130 days, which decreased the pulse period by ∼1.8s. The spin-up rate, {dot}(P)~-1.5x10–7s/s, is the largest ever measured for SAX J2103.5+4545, and it is among the fastest for an accreting pulsar. The pulse profile shows evidence for temporal variability, apparently not related to the source flux or to the orbital phase. The X-ray spectrum is hard and there is significant emission up to 150keV. A new derivation of the orbital period, based on RXTE data, is also reported.

Abstract Copyright:

Journal keyword(s): X-rays: individuals: SAX J2103.5+4545 - X-rays: binaries - stars: neutron - accretion, accretion disks

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* V2246 Cyg HXB 20 32 15.2744631713 +37 38 14.839930326   22.16 19.41 17.32 15.18 B0Ve 382 0
2 GSC 03588-00834 HXB 21 03 35.7101268891 +45 45 05.568943629   15.34 14.20 13.49 12.75 B0Ve 153 0

    Equat.    Gal    SGal    Ecl

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2021.02.26-01:59:12

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