XMM-NEWTON Observation of the Seyfert 2 Galaxy NGC 4138

Details XMM-NEWTON Observation of the Seyfert 2 Galaxy NGC 4138 XMM-NEWTON Observation of the Seyfert 2 Galaxy NGC 4138

2002-09-05

arxiv.org/abs/astro-ph/0209098v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures. Presented at AGN05: Inflows, Outflows and Reprocessing around black holes, Como (Italy), 11-14 June 2002.

Scientific paper

The XMM-Newton data presented here are the first X-ray observation of the Seyfert 2 galaxy NGC4138. Although the galaxy has been pointed by ROSAT-HRI, it was not detected, with a flux upper limit of about 1.1x10^-13 erg cm^-2 s^-1 in the 0.2-2.4 keV energy band. XMM-Newton performed the observation on 26 November 2001. The source is detected for the first time in X-rays with F[0.2-2.4]=1.0x10^-13 erg cm^-2 s^-1, in agreement with the upper limit of ROSAT. The source spectrum is typical of Seyfert 2 galaxies. We find heavy obscuration (N_H about 8x10^22 cm^-2) and a flat photon index (1.6). The source intrinsic luminosity is about 5x10^41 erg/s in the 0.5-10 keV energy band.

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