One more surprise from the Circinus Galaxy: BeppoSAX discovery of a transmission component in hard X-rays

G. Matt; M. G. Uainazzi; R. Maiolino; S. Molendi; G. C. Perola; L. A. Antonelli; L. Bassani; W. N. Brandt; A. C. Fabian; F. Fiore; K. Iwasawa; G. Malaguti; A. Marconi; J. Poutanen

One more surprise from the Circinus Galaxy: BeppoSAX discovery of a transmission component in hard X-rays

G. Matt
, M. G. Uainazzi
, R. Maiolino
, S. Molendi
, G. C. Perola
, L. A. Antonelli
, L. Bassani
, W. N. Brandt
, A. C. Fabian
, F. Fiore
, K. Iwasawa
, G. Malaguti
, A. Marconi
, J. Poutanen

Research output: Contribution to journal › Review article › peer-review

Abstract

The Circinus Galaxy has been observed, for the first time above 10keV, by BeppoSAX. An excess emission above the extrapolation of the best fit 0.1-10 keV spectrum is apparent in the PDS data. The most likely explanation is that we are observing the nucleus through a column density of ∼ 4 × 10²⁴ cm^-2, i.e. large enough to completely block the radiation below 10 keV but small enough to permit partial transmission above this energy.

Original language	English (US)
Pages (from-to)	L39-L42
Journal	Astronomy and Astrophysics
Volume	341
Issue number	2
State	Published - 1999

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Cite this

@article{42e948063d394e4f8b641037a8e18a52,

title = "One more surprise from the Circinus Galaxy: BeppoSAX discovery of a transmission component in hard X-rays",

abstract = "The Circinus Galaxy has been observed, for the first time above 10keV, by BeppoSAX. An excess emission above the extrapolation of the best fit 0.1-10 keV spectrum is apparent in the PDS data. The most likely explanation is that we are observing the nucleus through a column density of ∼ 4 × 1024 cm-2, i.e. large enough to completely block the radiation below 10 keV but small enough to permit partial transmission above this energy.",

author = "G. Matt and Uainazzi, \{M. G.\} and R. Maiolino and S. Molendi and Perola, \{G. C.\} and Antonelli, \{L. A.\} and L. Bassani and Brandt, \{W. N.\} and Fabian, \{A. C.\} and F. Fiore and K. Iwasawa and G. Malaguti and A. Marconi and J. Poutanen",

year = "1999",

language = "English (US)",

volume = "341",

pages = "L39--L42",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

number = "2",

}

TY - JOUR

T1 - One more surprise from the Circinus Galaxy

T2 - BeppoSAX discovery of a transmission component in hard X-rays

AU - Matt, G.

AU - Uainazzi, M. G.

AU - Maiolino, R.

AU - Molendi, S.

AU - Perola, G. C.

AU - Antonelli, L. A.

AU - Bassani, L.

AU - Brandt, W. N.

AU - Fabian, A. C.

AU - Fiore, F.

AU - Iwasawa, K.

AU - Malaguti, G.

AU - Marconi, A.

AU - Poutanen, J.

PY - 1999

Y1 - 1999

N2 - The Circinus Galaxy has been observed, for the first time above 10keV, by BeppoSAX. An excess emission above the extrapolation of the best fit 0.1-10 keV spectrum is apparent in the PDS data. The most likely explanation is that we are observing the nucleus through a column density of ∼ 4 × 1024 cm-2, i.e. large enough to completely block the radiation below 10 keV but small enough to permit partial transmission above this energy.

AB - The Circinus Galaxy has been observed, for the first time above 10keV, by BeppoSAX. An excess emission above the extrapolation of the best fit 0.1-10 keV spectrum is apparent in the PDS data. The most likely explanation is that we are observing the nucleus through a column density of ∼ 4 × 1024 cm-2, i.e. large enough to completely block the radiation below 10 keV but small enough to permit partial transmission above this energy.

UR - https://www.scopus.com/pages/publications/0002466914

UR - https://www.scopus.com/pages/publications/0002466914#tab=citedBy

M3 - Review article

AN - SCOPUS:0002466914

SN - 0004-6361

VL - 341

SP - L39-L42

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 2

ER -

One more surprise from the Circinus Galaxy: BeppoSAX discovery of a transmission component in hard X-rays

Abstract

All Science Journal Classification (ASJC) codes

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