2016MNRAS.461.1927P

Query : 2016MNRAS.461.1927P

2016MNRAS.461.1927P - Mon. Not. R. Astron. Soc., 461, 1927-1936 (2016/September-2)

The detection and X-ray view of the changing look AGN HE 1136-2304.

PARKER M.L., KOMOSSA S., KOLLATSCHNY W., WALTON D.J., SCHARTEL N., SANTOS-LLEO M., HARRISON F.A., FABIAN A.C., ZETZL M., GRUPE D., RODRIGUEZ-PASCUAL P.M. and VASUDEVAN R.V.

Abstract (from CDS):

We report the detection of high-amplitude X-ray flaring of the AGN HE 1136-2304, which is accompanied by a strong increase in the flux of the broad Balmer lines, changing its Seyfert type from almost type 2 in 1993 down to 1.5 in 2014. HE 1136-2304 was detected by the XMM-Newton slew survey at >10 times the flux it had in the ROSAT all-sky survey, and confirmed with Swift follow-up after increasing in X-ray flux by a factor of ∼30. Optical spectroscopy with SALT shows that the AGN has changed from a Seyfert 1.95 to a Seyfert 1.5 galaxy, with greatly increased broad line emission and an increase in blue continuum AGN flux by a factor of >4. The X-ray spectra from XMM-Newton and NuSTAR reveal moderate intrinsic absorption and a high energy cutoff at ∼100 keV. We consider several different physical scenarios for a flare, such as changes in obscuring material, tidal disruption events, and an increase in the accretion rate. We find that the most likely cause of the increased flux is an increase in the accretion rate, although it could also be due to a change in obscuration.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): accretion, accretion discs - black hole physics - galaxies: active - galaxies: Seyfert - galaxies: Seyfert

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 2dFGRS TGS564Z081 Sy2 01 19 08.6635573080 -34 11 30.527946780   16.226   15.275   ~ 159 0
2 ESO 113-45 Sy1 01 23 45.7631533440 -58 48 20.808928944   14.08 13.83 13.34   ~ 965 0
3 2MASS J01595763+0033105 Sy1 01 59 57.6419121888 +00 33 10.497849444   20.31 19.66     ~ 109 0
4 Z 387-34 Sy1 02 06 15.9896281128 -00 17 29.221733688   15.90 15.50 10.3   ~ 405 0
5 NGC 863 Sy2 02 14 33.5604714720 -00 46 00.181845336   14.48 13.81 17.9   ~ 770 0
6 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1448 3
7 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1987 2
8 2MASS J07482067+4712138 G 07 48 20.6613335097 +47 12 14.238929915           ~ 40 0
9 NGC 2617 Sy2 08 35 38.7981089496 -04 05 17.901104280   13.6   12.63 13.2 ~ 226 0
10 MCG+10-13-025 H2G 08 51 28.4754925036 +61 01 14.085281789   16.5       ~ 20 0
11 2MASS J09520955+2143132 Sy2 09 52 09.5610270816 +21 43 13.317315096   18.56 18.10     ~ 60 0
12 2MASS J10115298+5442063 Sy1 10 11 52.9792003320 +54 42 06.373633896   18.62 18.31     ~ 53 0
13 NGC 3515 rG 11 04 37.2453337752 +28 13 40.526632812   14.8       ~ 46 0
14 LEDA 801745 Sy2 11 38 51.0052630080 -23 21 35.346868704   17.4       ~ 72 1
15 LAWD 37 WD* 11 45 42.9169346379 -64 50 29.461957832 11.08 11.725 11.513 11.34 11.163 DQ 287 0
16 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3938 2
17 IC 3599 Sy1 12 37 41.1939398400 +26 42 27.484266888   15.7 16.5     ~ 191 0
18 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2895 0
19 NGC 7306 AG? 22 33 16.4851715712 -27 14 47.626397628   13.51   12.70 13.0 ~ 52 0
20 NGC 7582 Sy2 23 18 23.60 -42 22 13.3 11.62 10.92 10.62     ~ 978 3

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