Issue |
A&A
Volume 433, Number 2, April II 2005
|
|
---|---|---|
Page(s) | L41 - L44 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361:200500092 | |
Published online | 22 March 2005 |
Letter to the Editor
Discovery of X-ray pulsations from IGR J16320–4751 = AX J1631.9–4752
1
Space Research Institute, Russian Academy of Sciences, Profsoyuznaya 84/32, 117810 Moscow, Russia e-mail: lutovinov@hea.iki.rssi.ru
2
Max-Planck-Institute für Astrophysik, Karl-Schwarzschild-Str. 1, 85740 Garching bei München, Germany
3
CEA Saclay, DSM/DAPNIA/SAp (CNRS FRE 2591), 91191 Gif-sur-Yvette Cedex, France
4
Integral Science Data Center, Chemin d'Ecogia 16, 1290 Versoix, Switzerland
Received:
19
November
2004
Accepted:
23
February
2005
We report a discovery of strong modulations of the X-ray
flux detected from IGR J16320-4751 = AX J1631.9-4752 with a
period of s. We reanalyzed the data of an XMM-Newton
ToO performed soon after the discovery of the source by INTEGRAL
and found the modulation at a period of
± 40 s with a
high significance. Modulations of the source flux with two possible
periods of ~1300 and ~1500 s were identified in the
ASCA archival data. It is very likely that the modulation can be
interpreted as X-ray pulsations, favouring a pulsar as the compact
object in IGR/AX J16320-4752. Thus for the moment this source
became the fourth source from a new class of highly absorbed binary
systems for which the pulsations are observed.
Key words: individual: IGR J16320-4751 = AX J1631.9-4752 / binaries: general / X-rays: binaries
© ESO, 2005
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