1999A&A...344..857C


Query : 1999A&A...344..857C

1999A&A...344..857C - Astronomy and Astrophysics, volume 344, 857-867 (1999/4-3)

BeppoSAX observations of Mkn 3: Piercing through the torus of a Seyfert 2 galaxy.

CAPPI M., BASSANI L., COMASTRI A., GUAINAZZI M., MACCACARO T., MALAGUTI G., MATT G., PALUMBO G.G.C., BLANCO P., DADINA M., DAL FIUME D., DI COCCO G., FABIAN A.C., FRONTERA F., MAIOLINO R., PIRO L., TRIFOGLIO M. and ZHANG N.

Abstract (from CDS):

A new BeppoSAX broad-band (0.6-150keV) spectrum of the Seyfert 2 galaxy Mkn 3 is presented. The spectrum provides a direct measurement of a large, neutral column of gas with NH∼1024cm–2 in the source direction. The source, as bright as 3C 273 above 10keV, has a steep (Γ∼1.8) spectrum without any evidence of a high-energy cutoff up to at least 150keV. At lower energies, the data are best modeled with the addition of an unabsorbed reflection component. Combining these data with previous Ginga and ASCA observations, the Fe Kα and reflection continuum indicate that the reprocessed emission is responding slower than the intrinsic continuum variations suggesting a size of the reprocessor >2pc. Identifying such a reprocessor with a (close to edge-on) obscuring torus, the overall result fits well into unified models since, presumably, one can interpret the strong absorption as due to transmission through the rim of the torus and the unabsorbed (directly viewed) reflection component as due to reprocessing from the torus inner surface.

Abstract Copyright:

Journal keyword(s): galaxies: individual: Mkn 3 - galaxies: Seyfert - X-rays: galaxies

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 M 77 GiP 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4322 2
2 ESO 33-2 Sy2 04 55 58.9234130712 -75 32 28.272429996   14.61 14.60 13.39   ~ 140 1
3 NGC 2110 Sy2 05 52 11.3768668776 -07 27 22.507465392   14.77 13.51 11.86   ~ 626 1
4 LEDA 75476 Sy1 05 58 02.0566707456 -38 20 04.452162288   16.05 14.98 11.6   ~ 213 1
5 QSO B0607+710 BLL 06 13 43.3821991056 +71 07 26.779488276   19.6 19.61 19.1   ~ 81 1
6 Mrk 3 Sy2 06 15 36.2812259376 +71 02 14.837219808 14.21 14.03 12.97     ~ 881 3
7 NGC 2992 Sy2 09 45 42.045 -14 19 34.90 13.54 13.14 12.18 12.6 12.2 ~ 828 3
8 NGC 4051 Sy1 12 03 09.6101337312 +44 31 52.682601288   11.08 12.92 9.94   ~ 2078 1
9 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3520 2
10 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5555 1
11 NGC 4941 Sy2 13 04 13.1036380320 -05 33 05.752803672   13.18 12.23 10.74   ~ 332 0
12 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1365 2
13 NGC 5252 Sy2 13 38 15.8707724328 +04 32 33.521265600   15.21 14.21     ~ 448 0
14 NGC 7172 Sy2 22 02 01.897 -31 52 11.60   12.72 13.61 11.15   ~ 495 1

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2022.05.21-08:41:09

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