EDP Sciences
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Volume 398, Number 1, January IV 2003
Page(s) 223 - 228
Section Stellar atmospheres
DOI http://dx.doi.org/10.1051/0004-6361:20021709

A&A 398, 223-228 (2003)
DOI: 10.1051/0004-6361:20021709

Correlated X-ray timing and spectral behavior in GX 349+2

V. K. Agrawal1 and S. Bhattacharyya2, 3

1  ISRO Satellite Centre, Airport Road, Bangalore 560 017, India
2  Joint Astronomy Program, Indian Institute of Science, Bangalore 560012, India
3  Indian Institute of Astrophysics, Bangalore 560 034, India
    e-mail: vivek_isac@yahoo.com; sudip@physics.iisc.ernet.in

(Received 27 December 2001 / Accepted 4 November 2002 )

We present a detailed and systematic investigation of correlated spectral and timing properties of the Z source GX 349+2, using extensive data $(\sim $221 ks) obtained from the Proportional-Counter-Array on-board RXTE satellite, during January 1998 and September-October 1998. For the first time a detailed comparison between the normal-branch-properties and the flaring-branch-properties of GX 349+2 has been possible, since this study showed the presence of a rare, extended normal branch. Peaked noise properties have been analyzed as functions of position along the Z-track and have been compared to those of Cyg X-2.

Key words: accretion, accretion disks -- stars: binaries: close -- stars: individual: GX 349+2 -- stars: neutron -- X-rays: stars

Offprint request: V. K. Agrawal, vivek_isac@yahoo.com

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