2021A&A...647A.195G


Query : 2021A&A...647A.195G

2021A&A...647A.195G - Astronomy and Astrophysics, volume 647A, 195-195 (2021/3-1)

A new panchromatic classification of unclassified Burst Alert Telescope active galactic nuclei.

GIULIANI L., GHISELLINI G. and SBARRATO T.

Abstract (from CDS):

We collect data at all frequencies for the new sources classified as unknown active galactic nuclei (AGNs) in the latest Burst Alert Telescope all-sky hard X-ray catalog. Focusing on the 36 sources with measured redshift, we compute their spectral energy distribution (SED) from radio to γ-rays with the aim to classify these objects. We apply emission models that attempt to reproduce the obtained SEDs, including: (i) a standard thin accretion disk together with an obscuring torus and a X-ray corona; (ii) a two temperature thick advection-dominated flow; (iii) an obscured AGN model, accounting for absorption along the line of sight at kiloelectronvolt energies and in the optical band; and (iv) a phenomenological model to describe the jet emission in blazar-like objects. We integrate the models with the SWIRE template libraries to account for the emission of the host galaxy. For every source we found a good agreement between data and our model. Considering that the sources were selected in the hard X-ray band, which is rather unaffected by absorption, we expected and found a large fraction of absorbed radio-quiet AGNs (31 out of 36) and some additional rare radio-loud sources (5 out of 36), since the jet emission in hard X-rays is important for aligned jets owing to the boost produced by the beaming effect. With our work we can confirm the hypothesis that a number of galaxies, whose optical spectra lack AGN emission features, host an obscured active nucleus. The approach we used proved to be efficient in rapidly identifying objects, which commonly used methods were not able to classify.

Abstract Copyright: © ESO 2021

Journal keyword(s): radiation mechanisms: non-thermal - radiation mechanisms: thermal - galaxies: active - galaxies: jets - X-rays: general - galaxies: nuclei

VizieR on-line data: <Available at CDS (J/A+A/647/A195): table1.dat table2.dat table3.dat table4.dat>

Simbad objects: 29

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Number of rows : 29
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 IC 5373 Sy2 00 00 28.8069546744 +32 46 56.762114916   15.3       ~ 25 0
2 NGC 238 Sy2 00 43 25.7445053400 -50 10 58.333706292   13.28   12.14 12.5 ~ 31 0
3 MCG-03-04-054 Sy2 01 20 43.0638603744 -14 43 55.540157808   15   14.29   ~ 17 0
4 PMN J0131-1009 Rad 01 31 26.7133779816 -10 09 31.152482244           ~ 10 0
5 QSO B0142-278 QSO 01 45 03.3949333872 -27 33 34.327137060   19.0 19.0 17.43   ~ 133 1
6 2dFGRS TGS384Z181 Sy2 01 55 31.64 -30 45 53.5   18.955   17.379   ~ 6 0
7 QSO B0158+031 QSO 02 00 40.81649371 +03 22 49.5071994   21.1       ~ 46 1
8 UGC 1493 A Sy2 02 01 09.4579615752 +50 30 25.655736960   14.4       ~ 27 1
9 LEDA 2725446 Sy2 03 02 21.5938983120 +68 55 07.706027172           ~ 11 0
10 RX J0316.6+1554 X 03 16 39.00 +15 54 35.5           ~ 6 0
11 IRAS 03269-2211 G 03 29 10.3002491520 -22 01 16.414664556   15.66       ~ 23 0
12 ESO 257-15 Sy2 07 26 24.2063290680 -46 20 57.247406664   16.04   14.54   ~ 18 0
13 IC 2207 Sy2 07 49 50.897 +33 57 44.14   15.4       ~ 61 0
14 ESO 315-20 Sy2 09 42 22.082 -41 48 57.30   17.02   14.60   ~ 30 0
15 2MASS J10483382-3902379 Sy1 10 48 33.8276094480 -39 02 38.043647556   17.05   15.89   ~ 20 0
16 2dFGRS TGN109Z089 Sy2 11 21 18.7423694352 -05 23 34.988605980   17.546   16.332   ~ 6 0
17 MCG-01-33-063 Sy2 13 00 19.1141097000 -08 05 14.562165012   15   14.10   ~ 32 0
18 Z 365-16 Sy2 13 43 52.8849486960 +80 35 49.403445324   15.4       ~ 11 0
19 2MASS J15341321+6258579 AGN 15 34 13.2313271520 +62 58 58.015536492           ~ 7 0
20 ESO 586-4 Sy2 16 49 21.020 -17 38 40.33           ~ 25 0
21 2MASX J17353371+2047470 Sy2 17 35 33.7558321464 +20 47 47.042181276           ~ 7 0
22 RX J1756.4+5235 AGN 17 56 25.9 +52 35 10           ~ 5 0
23 2E 4013 AGN 18 09 53.3 -65 56 19     18.0     ~ 17 1
24 LEDA 968357 AG? 20 04 33.4526870832 -11 13 51.876888672   16.26   14.40   ~ 19 0
25 2MASS J20442216-0957354 AG? 20 44 22.1580509520 -09 57 35.424377460   18.09   16.94   ~ 10 0
26 GALEXASC J211218.07-425638.9 AGN 21 12 18.08 -42 56 39.1           ~ 4 0
27 LEDA 163039 Sy1 21 17 41.6501751840 -02 08 33.764828964   16.71   15.67   ~ 16 0
28 2MASX J21480531-5359413 G 21 48 05.3347249200 -53 59 41.000674884   15.66       ~ 18 0
29 IRAS F23034-5203 Sy2 23 06 16.5896728776 -51 47 46.603970124   16.78   15.53   ~ 14 0

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