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The FERMI/LAT sky as seen by INTEGRAL/IBIS

The FERMI/LAT sky as seen by INTEGRAL/IBIS
The FERMI/LAT sky as seen by INTEGRAL/IBIS
In this Letter we present the result of the cross correlation between the fourth INTEGRAL/IBIS soft gamma-ray catalog, in the range 20-100 keV, and the Fermi LAT bright source list of objects emitting in the 100 MeV-100 GeV range. The main result is that only a minuscule part of the more than 720 sources detected by INTEGRAL and the population of 205 Fermi LAT sources are detected in both spectral regimes. This is in spite of the mCrab INTEGRAL sensitivity for both galactic and extragalactic sources and the breakthrough, in terms of sensitivity, achieved by Fermi at MeV-GeV energies. The majority of the 14 Fermi LAT sources clearly detected in the fourth INTEGRAL/IBIS catalog are optically identified active galactic nuclei (10) complemented by two isolated pulsars (Crab and Vela) and two high-mass X-ray binaries (LS I +61°303 and LS 5039). Two more possible associations have been found: one is 0FGL J1045.6-5937, possibly the counterpart at high energy of the massive colliding wind binary system Eta Carinae, discovered to be a soft gamma ray emitter by recent INTEGRAL observations and 0FGL J1746.0-2900 coincident with IGR J17459-2902, but still not identified with any known object at lower energy. For the remaining 189 Fermi LAT sources no INTEGRAL counterpart was found and we report the 2? upper limit in the energy band 20-40 keV.
gamma rays: observations
L7
Ubertini, P.
7035748e-152c-473e-8766-a2fa3ac49fcb
Sguera, V.
371bb568-7e56-496e-a624-dba6de79d9e1
Stephen, J.B.
c0b1afce-f3d9-4568-b2c1-51482f80cd9a
Bassani, L.
07e5602c-f97e-4334-a0fa-c2212431a61a
Bazzano, A.
8eef0c6e-1a5f-4bcd-a034-9a5c3b29104d
Bird, A.J.
045ee141-4720-46fd-a412-5aa848a91b32
Ubertini, P.
7035748e-152c-473e-8766-a2fa3ac49fcb
Sguera, V.
371bb568-7e56-496e-a624-dba6de79d9e1
Stephen, J.B.
c0b1afce-f3d9-4568-b2c1-51482f80cd9a
Bassani, L.
07e5602c-f97e-4334-a0fa-c2212431a61a
Bazzano, A.
8eef0c6e-1a5f-4bcd-a034-9a5c3b29104d
Bird, A.J.
045ee141-4720-46fd-a412-5aa848a91b32

Ubertini, P., Sguera, V., Stephen, J.B., Bassani, L., Bazzano, A. and Bird, A.J. (2009) The FERMI/LAT sky as seen by INTEGRAL/IBIS. The Astrophysical Journal Letters, 706 (1), L7. (doi:10.1088/0004-637X/706/1/L7).

Record type: Article

Abstract

In this Letter we present the result of the cross correlation between the fourth INTEGRAL/IBIS soft gamma-ray catalog, in the range 20-100 keV, and the Fermi LAT bright source list of objects emitting in the 100 MeV-100 GeV range. The main result is that only a minuscule part of the more than 720 sources detected by INTEGRAL and the population of 205 Fermi LAT sources are detected in both spectral regimes. This is in spite of the mCrab INTEGRAL sensitivity for both galactic and extragalactic sources and the breakthrough, in terms of sensitivity, achieved by Fermi at MeV-GeV energies. The majority of the 14 Fermi LAT sources clearly detected in the fourth INTEGRAL/IBIS catalog are optically identified active galactic nuclei (10) complemented by two isolated pulsars (Crab and Vela) and two high-mass X-ray binaries (LS I +61°303 and LS 5039). Two more possible associations have been found: one is 0FGL J1045.6-5937, possibly the counterpart at high energy of the massive colliding wind binary system Eta Carinae, discovered to be a soft gamma ray emitter by recent INTEGRAL observations and 0FGL J1746.0-2900 coincident with IGR J17459-2902, but still not identified with any known object at lower energy. For the remaining 189 Fermi LAT sources no INTEGRAL counterpart was found and we report the 2? upper limit in the energy band 20-40 keV.

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More information

Published date: 20 November 2009
Keywords: gamma rays: observations

Identifiers

Local EPrints ID: 144771
URI: http://eprints.soton.ac.uk/id/eprint/144771
PURE UUID: 69057d18-161c-4f38-9c8d-0fba3e2e3b0f
ORCID for A.J. Bird: ORCID iD orcid.org/0000-0002-6888-8937

Catalogue record

Date deposited: 24 May 2010 15:39
Last modified: 09 Nov 2021 02:44

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Contributors

Author: P. Ubertini
Author: V. Sguera
Author: J.B. Stephen
Author: L. Bassani
Author: A. Bazzano
Author: A.J. Bird ORCID iD

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