2009A&A...496..653M


Query : 2009A&A...496..653M

2009A&A...496..653M - Astronomy and Astrophysics, volume 496, 653-658 (2009/3-4)

Suzaku observation of the Phoenix galaxy.

MATT G., BIANCHI S., AWAKI H., COMASTRI A., GUAINAZZI M., IWASAWA K., JIMENEZ-BAILON E. and NICASTRO F.

Abstract (from CDS):

In recent years, several Seyfert 2 galaxies have been discovered that change state when observed in X-rays a few years apart, switching from Compton-thin to reflection-dominated or viceversa. We observed a member of this class of ``Changing-look'' sources, the Phoenix galaxy, with Suzaku, with the aim of better understanding the nature of the variations. The Suzaku spectrum was analyzed, and the results compared with previous ASCA and XMM-Newton observations. The source was caught in a Compton-thin state, as in XMM-Newton, but differently from ASCA. Comparing the Suzaku and XMM-Newton observations, a variation in the column density of the absorber on a time scale of years is discovered. A similar change, but on much shorter time scales (i.e. ks) may also explain the count-rate variations during the Suzaku observations. A soft excess is also present, likely due to continuum and line emission from photoionized circumnuclear matter.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: Seyfert - galaxies: individual: Phoenix - X-rays: galaxies

Simbad objects: 6

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Number of rows : 6
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 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 497 2
2 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1639 2
3 Mrk 1210 Sy2 08 04 05.8608218112 +05 06 49.823376120   14.55 13.7     ~ 281 2
4 NGC 2992 Sy2 09 45 42.045 -14 19 34.90 13.54 13.14 12.18 12.6 12.2 ~ 828 3
5 NGC 4051 Sy1 12 03 09.6101337312 +44 31 52.682601288   11.08 12.92 9.94   ~ 2078 1
6 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 12914 0

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2022.05.28-10:42:04

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