INTEGRAL observations of EGRET sources in the Norma region
These two images show a deep exposure (~700 ks obtained from Galactic
Center Deep Exposure observations) of the Norma spiral arm tangent
region. The images show the IBIS/ISGRI image in the 20-100 keV range
(top) with EGRET contours superimposed and the 100-250 keV image
(bottom). In the case of 3EG J1639-4702 the possible dust-enshrouded
source IGR J16313-4643 has been proposed as a counterpart
(
Malizia et al. 2004, Atel 227;
Combi et al. 2004, astro-ph/0401643). However, the
high energy image shows that only GX 337+00 (a black hole candidate)
emits above 100 keV. GX 337+00 shows many chararacteristics of
galactic microquasars (radio jets, QPO, and X-ray behaviour).
Credits: A. Malizia & L. Bassani (IASF CNR/Bologna)
A. Bazzano (IASF CNR/Roma)
