Issue |
A&A
Volume 394, Number 3, November II 2002
|
|
---|---|---|
Page(s) | 801 - 805 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361:20021202 | |
Published online | 21 October 2002 |
BeppoSAX/PDS identification of the true counterpart of the Piccinotti source H0917-074
1
IASF/CNR, via Piero Gobetti 101, 40129 Bologna, Italy
2
INAF/Osservatorio Astronomico di Bologna, via Ranzani 1, 40127 Bologna, Italy
3
Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Lab, University Park, PA 16802, USA
Corresponding author: A. Malizia, malizia@bo.iasf.cnr.it
Received:
20
June
2002
Accepted:
5
August
2002
High energy emission has been discovered serendipitously by
the BeppoSAX/PDS telescope in the ~1.3° field of view
around the Piccinotti source H0917-074. A re-pointing of
BeppoSAX/NFI has allowed the association of this emission
with the Seyfert 2 galaxy MCG-1-24-12 which lies within the original HEAO1/A2
error box of H0917-074. This is the first PDS serendipitous discovery
of a Seyfert 2 galaxy and the first detection of MCG-1-24-12 in the X-ray
domain. The measured 2–10 keV flux of MCG-1-24-12 is ~1
10-11 erg cm-2 s-1 compatible with the Piccinotti HEAO-1/A2
observation. This is a factor of ~6 greater
than that observed from EXO0917.3-0722, originally suggested as the counterpart
of the Piccinotti source. The 2–10 keV spectrum of MCG-1-24-12 shows the presence of Fe
Kα emission together with an absorption feature at ~8.7 keV. At high energies, the Seyfert 2 still dominates and the observed 20–100 keV flux is ~4
10-11 erg cm-2 s-1.
Key words: X-rays: galaxies / galaxies: Seyfert / galaxies: individual: MCG-1-24-12
© ESO, 2002
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