Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-12-13
Astronomy and Astrophysics
Astrophysics
Accepted for publication in MNRAS. 7 pages, 5 figures (Note the resolution of figure 5 has been reduced)
Scientific paper
10.1111/j.1365-2966.2008.12849.x
IGR J16493-4348 was one of the first new sources to be detected by the INTEGRAL gamma-ray telescope in the 18-100 keV energy band. Based upon spatial coincidence the source was originally associated with the free radio pulsar PSR J1649-4349. Presented here are the results of 2.8 Ms of observations made by the INTEGRAL mission and a 5.6 ks observation with the Swift X-ray Telescope. Spectral analysis indicates that the source is best modeled by an absorbed power law with a high energy cut-off at E$_{cut}$~15 keV and a hydrogen absorbing column of NH=5.4$^{+1.3}_{-1}$ x 10$^{22}$ cm$^{-2}$. Analysis of the light curves indicates that the source is a weak, persistent gamma-ray emitter showing indications of variability in the 2-9 and 22-100 keV bands. The average source flux is ~1.1 x 10^{-10} erg cm$^{-2}$ s$^{-1}$ in the 1-100 keV energy band. No coherent timing signal is identified at any timescale in the INTEGRAL or Swift data. The refined source location and positional uncertainty of IGR J16493-4348 places PSR J1649-4349 outside of the 90% error circle. We conclude that IGR J16493-4348 is not associated with PSR J1649-4349. Combining the INTEGRAL observations with Swift/XRT data and information gathered by RXTE and Chandra we suggest that IGR J16493-4348 is an X-ray binary; and that the source characteristics favour a high mass X-ray binary although an LMXB nature cannot be ruled out.
Bazzano Angela
Bird Andrew J.
Dean Anthony J.
Hill Adam B.
Landi Raffaella
No associations
LandOfFree
Probing the nature of IGR J16493-4348: Spectral and temporal analysis of the 1-100 keV emission does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Probing the nature of IGR J16493-4348: Spectral and temporal analysis of the 1-100 keV emission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Probing the nature of IGR J16493-4348: Spectral and temporal analysis of the 1-100 keV emission will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-623000