The integral view of the galactic nucleus

A. Goldwurm; G. Bélanger; 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; G. Skinner; N. Lund; F. Melia; F. Yusef-Zadeh

The integral view of the galactic nucleus

A. Goldwurm^*, G. Bélanger, 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, G. Skinner, N. Lund, F. Melia, F. Yusef-Zadeh

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Conference article › peer-review

Abstract

We present the preliminary results of the observational campaign performed in 2003 to study the Galactic Nucleus with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture instrument in the energy range above 20 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′. We report on the discovery of a source, IGR J17456-2901, compatible with the instrument's point spread function and coincident with the Galactic Nucleus Sgr A*to within 0.9′. The source is visible up to 60-80 keV with a 20-100 keV luminosity at 8 kpc of 3 × 10³⁵ erg s^-1. Although we cannot unequivocally associate the new INTEGRAL source to the Galactic Nucleus, this is the first report of significant hard X-ray emission from within the inner 10′ of the Galaxy and a contribution from the galactic center supermassive black hole itself cannot be excluded. Here we discuss the results obtained and the perspectives for future observations of the Galactic Nucleus with INTEGRAL and other observatories.

Original language	English (US)
Pages (from-to)	237-242
Number of pages	6
Journal	European Space Agency, (Special Publication) ESA SP
Issue number	552
State	Published - 2004
Event	5th INTEGRAL Workshop on The INTEGRAL Universe - Munich, Germany Duration: Feb 16 2004 → Feb 20 2004

Keywords

Accretion
Black hole physics
Galaxy: center
Galaxy: nucleus
Gamma-rays: observations
X-Rays: individuals: Sgr A*

ASJC Scopus subject areas

Aerospace Engineering
Space and Planetary Science

Cite this

@article{0eb102b8c73f4c39a657bc52563de11e,

title = "The integral view of the galactic nucleus",

abstract = "We present the preliminary results of the observational campaign performed in 2003 to study the Galactic Nucleus with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture instrument in the energy range above 20 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′. We report on the discovery of a source, IGR J17456-2901, compatible with the instrument's point spread function and coincident with the Galactic Nucleus Sgr A*to within 0.9′. The source is visible up to 60-80 keV with a 20-100 keV luminosity at 8 kpc of 3 × 1035 erg s-1. Although we cannot unequivocally associate the new INTEGRAL source to the Galactic Nucleus, this is the first report of significant hard X-ray emission from within the inner 10′ of the Galaxy and a contribution from the galactic center supermassive black hole itself cannot be excluded. Here we discuss the results obtained and the perspectives for future observations of the Galactic Nucleus with INTEGRAL and other observatories.",

keywords = "Accretion, Black hole physics, Galaxy: center, Galaxy: nucleus, Gamma-rays: observations, X-Rays: individuals: Sgr A*",

author = "A. Goldwurm and G. B{\'e}langer and P. Goldoni and J. Paul and R. Terrier and M. Falanga and P. Ubertini and A. Bazzano and {Del Santo}, M. and C. Winkler and Parmar, {A. N.} and E. Kuulkers and K. Ebisawa and Roques, {J. P.} and G. Skinner and N. Lund and F. Melia and F. Yusef-Zadeh",

year = "2004",

language = "English (US)",

pages = "237--242",

journal = "European Space Agency, (Special Publication) ESA SP",

issn = "0379-6566",

publisher = "European Space Agency",

number = "552",

note = "5th INTEGRAL Workshop on The INTEGRAL Universe ; Conference date: 16-02-2004 Through 20-02-2004",

}

TY - JOUR

T1 - The integral view of the galactic nucleus

AU - Goldwurm, A.

AU - Bélanger, G.

AU - Goldoni, P.

AU - Paul, J.

AU - Terrier, R.

AU - Falanga, M.

AU - Ubertini, P.

AU - Bazzano, A.

AU - Del Santo, M.

AU - Winkler, C.

AU - Parmar, A. N.

AU - Kuulkers, E.

AU - Ebisawa, K.

AU - Roques, J. P.

AU - Skinner, G.

AU - Lund, N.

AU - Melia, F.

AU - Yusef-Zadeh, F.

PY - 2004

Y1 - 2004

N2 - We present the preliminary results of the observational campaign performed in 2003 to study the Galactic Nucleus with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture instrument in the energy range above 20 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′. We report on the discovery of a source, IGR J17456-2901, compatible with the instrument's point spread function and coincident with the Galactic Nucleus Sgr A*to within 0.9′. The source is visible up to 60-80 keV with a 20-100 keV luminosity at 8 kpc of 3 × 1035 erg s-1. Although we cannot unequivocally associate the new INTEGRAL source to the Galactic Nucleus, this is the first report of significant hard X-ray emission from within the inner 10′ of the Galaxy and a contribution from the galactic center supermassive black hole itself cannot be excluded. Here we discuss the results obtained and the perspectives for future observations of the Galactic Nucleus with INTEGRAL and other observatories.

AB - We present the preliminary results of the observational campaign performed in 2003 to study the Galactic Nucleus with INTEGRAL. The mosaicked images obtained with the IBIS/ISGRI coded aperture instrument in the energy range above 20 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′. We report on the discovery of a source, IGR J17456-2901, compatible with the instrument's point spread function and coincident with the Galactic Nucleus Sgr A*to within 0.9′. The source is visible up to 60-80 keV with a 20-100 keV luminosity at 8 kpc of 3 × 1035 erg s-1. Although we cannot unequivocally associate the new INTEGRAL source to the Galactic Nucleus, this is the first report of significant hard X-ray emission from within the inner 10′ of the Galaxy and a contribution from the galactic center supermassive black hole itself cannot be excluded. Here we discuss the results obtained and the perspectives for future observations of the Galactic Nucleus with INTEGRAL and other observatories.

KW - Accretion

KW - Black hole physics

KW - Galaxy: center

KW - Galaxy: nucleus

KW - Gamma-rays: observations

KW - X-Rays: individuals: Sgr A

UR - http://www.scopus.com/inward/record.url?scp=23844463817&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=23844463817&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:23844463817

SN - 0379-6566

SP - 237

EP - 242

JO - European Space Agency, (Special Publication) ESA SP

JF - European Space Agency, (Special Publication) ESA SP

IS - 552

T2 - 5th INTEGRAL Workshop on The INTEGRAL Universe

Y2 - 16 February 2004 through 20 February 2004

ER -

The integral view of the galactic nucleus

Abstract

Keywords

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this