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Detection of hard X-ray emission from the Galactic nuclear region with INTEGRAL | G. Belanger
; A. Goldwurm
; P. Goldoni
; J. Paul
; R. Terrier
; M. Falanga
; P. Ubertini
; A. Bazzano
; M. Del Santo
; C. Winkler
; A. N. Parmar
; E. Kuulkers
; K. Ebisawa
; J. P. Roques
; N. Lund
; F. Melia
; | Date: |
6 Nov 2003 | Journal: | Astrophys.J. 601 (2004) L163-L166 | Subject: | astro-ph | Affiliation: | Service d’Astrophysique, CEA/Saclay, France, IASF CNR, Italy, ESA, ESTEC, Netherlands, ISDC, Switzerland, CESR, France, DSRI, Denmark, U. of Arizona, USA | Abstract: | This letter presents the first results of an observational campaign to study the Galactic Centre with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture instrument in the energy ranges 20-40 and 40-100 keV, give a yet unseen view of the high-energy sources of this region in hard X- and gamma-rays with an angular resolution of 12 arcmin (FWHM). We report on the discovery of a source, IGR J17456-2901, coincident with the Galactic Nucleus SgrA* to within 0.9 arcmin. Located at R.A.(J2000.0) = 17h45m38.5s, Dec.(J2000.0) = -29:01:15, the source is visible up to about 100 keV with a 20-100 keV luminosity at 8 kpc of (2.89 +/- 0.41) x 10^35 ergs/s. Although the new INTEGRAL source cannot unequivocally be associated to the Galactic Nucleus, this is the first report of significant hard X-ray emission from within the inner 10 arcmin of the Galaxy and a contribution from the galactic supermassive black hole itself cannot be excluded. | Source: | arXiv, astro-ph/0311147 | Services: | Forum | Review | PDF | Favorites |
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