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Astron. Astrophys. 317, 686-688 (1997)

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Research Note

The ROSAT PSPC spectrum of the Seyfert 2 galaxy NGC 4388

L. Angelo Antonelli 1, 3, Giorgio Matt 2 and Luigi Piro 1

1 Istituto di Astrofisica Spaziale, CNR, Via Enrico Fermi 21-C.P.67, I-00044 Frascati, Italy
2 Dipartimento di Fisica, Università degli Studi "Roma Tre", Via della Vasca Navale 84, I-00146 Roma, Italy
3 Present Address: SAX/SDC Nuova Telespazio, Via Corcolle 19, I-00131 Roma, Italy

Received 13 May 1996 / Accepted 20 June 1996

Abstract

The ROSAT PSPC spectrum of the Seyfert 2 galaxy NGC 4388 is analyzed, with the aim to better understand the nature of the extended (a few kpc) soft X-ray emission discovered by the ROSAT HRI. Fitting the spectrum with an optically thin thermal model we find evidence for a metal abundance significantly lower than solar. We therefore argue that the emission is due at least in part to another component, maybe unresolved emission from compact sources.

Key words: galaxies: individual: NGC 4388 – galaxies: Seyfert – X-rays: galaxies

Send offprint requests to: L.A. Antonelli

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© European Southern Observatory (ESO) 1997

Online publication: July 8, 1998
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