2022A&A...664A.158R

Query : 2022A&A...664A.158R

2022A&A...664A.158R - Astronomy and Astrophysics, volume 664A158-158 (2022/8-1)

Energetic nuclear transients in luminous and ultraluminous infrared galaxies.

REYNOLDS T.M., MATTILA S., EFSTATHIOU A., KANKARE E., KOOL E., RYDER S., PENA-MONINO L. and PEREZ-TORRES M.A.

Abstract (from CDS):

Energetic nuclear outbursts have been discovered in luminous and ultraluminous infrared galaxies (U/LIRGs) at unexpectedly high rates. To investigate this population of transients, we performed a search in mid-IR data from the Wide-field Infrared Survey Explorer (WISE) satellite and its NEOWISE survey to detect and characterise luminous and smoothly evolving transients in a sample of 215 U/LIRGs. We report three new transients, all with ΔL > 1043 erg s–1, in addition to two previously known cases. Their host galaxies are all part of major galaxy mergers, and through radiative transfer model fitting we find that all have a significant contribution from an active galactic nucleus (AGN). We characterised the transients through measurements of their luminosities and resulting energetics, all of which are between 1050.9 erg and 1052.2 erg. The IR emission of the five transients was found to be consistent with re-radiation by the hot dust of emission at shorter wavelengths, presumably originating from an accretion event, onto the supermassive black hole. The corresponding transient rate of (1.6-4.6) x 10–3 yr–1 galaxy–1 is over an order of magnitude higher than the rate of large amplitude flares shown by AGN in the optical. We suggest that the observed transients are part of a dust-obscured population of tidal disruption events (TDEs) that have remained out of the reach of optical surveys due to the obscuring dust. In one case, this is supported by our radio observations. We also discuss other plausible explanations. The observed rate of events is significantly higher than optical TDE rates, which can be expected in U/LIRG hosts undergoing a major galaxy merger with increased stellar densities in the nuclear regions. Continued searches for such transients and their multi-wavelength follow-up is required to constrain their rate and nature.

Abstract Copyright: © T. M. Reynolds et al. 2022

Journal keyword(s): black hole physics - galaxies: starburst - galaxies: nuclei - infrared: general

VizieR on-line data: <Available at CDS (J/A+A/664/A158): tablea1.dat>

Simbad objects: 249

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Number of rows : 249
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 NGC 23 AGN 00 09 53.411 +25 55 25.46   12.5       ~ 331 2
2 NGC 17 Sy2 00 11 06.612 -12 06 28.33   14.14 13.52     ~ 369 1
3 MCG-02-01-052 EmG 00 18 50.152 -10 21 41.49   13 13.60 14.13   ~ 68 3
4 MCG-02-01-051 Sy2 00 18 50.898 -10 22 36.49   14.81 14.33     ~ 154 3
5 CNSS J001947.3+003527 cm 00 19 47.335038 +00 35 26.81020           ~ 32 0
6 ESO 350-38 Sy2 00 36 52.489 -33 33 17.23   14.31 14.41 13.49   ~ 450 0
7 NGC 232 Sy2 00 42 45.814 -23 33 40.69   14.43   12.78   ~ 167 0
8 MCG+12-02-001 AG? 00 54 03.943 +73 05 05.23   16       ~ 120 1
9 NGC 317B GiG 00 57 40.4224786560 +43 47 32.215596936   14.16 13.94 13.05 11.95 ~ 90 1
10 IRAS 01003-2238 Sy2 01 02 49.9920152640 -22 21 57.262136544   18.62 18.9 17.83   ~ 192 0
11 IC 1623 IG 01 07 47.24 -17 30 25.0   15       ~ 338 2
12 MCG-03-04-014 Sy1 01 10 08.92440 -16 51 09.7668   15   13.96   ~ 117 1
13 ESO 244-12 PaG 01 18 08.31 -44 27 43.4           ~ 88 1
14 Z 436-30 LIN 01 20 02.654 +14 21 41.73   14.9       ~ 176 1
15 MCG-06-04-050 EmG 01 34 51.2977756128 -36 08 14.160509484   14.16   12.72   ~ 71 1
16 NGC 633 EmG 01 36 23.418 -37 19 17.64   13.50   12.50   ~ 101 1
17 MCG-06-04-057 Sy2 01 36 24.1505027520 -37 20 25.708312896   15.06   13.76 14.7 ~ 55 1
18 IRAS 01364-1042 LIN 01 38 52.86288 -10 27 11.5848   16.77   15.74   ~ 132 0
19 ZW III 35 Sy2 01 44 30.516 +17 06 09.18   15.24 14.81     ~ 261 1
20 NGC 695 AGN 01 51 14.3479513536 +22 34 55.956444960   13.7       ~ 201 1
21 Z 522-58 GiC 01 54 53.807 +36 55 04.64   14.2   13.05   ~ 148 1
22 Z 482-32 EmG 01 58 30.030 +25 21 36.13   14.3       ~ 78 1
23 NGC 838 LIN 02 09 38.562 -10 08 46.12   13.72   12.65   ~ 211 1
24 NGC 839 EmG 02 09 42.73127 -10 11 01.6370   13.98 11.42 12.70   ~ 161 1
25 NGC 828 AGN 02 10 09.5469097104 +39 11 25.233638244   13.0       ~ 171 1
26 IC 214 AGN 02 14 05.53344 +05 10 23.8692   14.4       ~ 157 0
27 NGC 877 LSB 02 17 59.6453041536 +14 32 38.215857696   12.5       ~ 189 1
28 Z 504-71 AGN 02 23 21.9558378744 +32 11 49.070032008   15.75 14.83     ~ 84 0
29 Z 553-7 AGN 02 24 07.9838118384 +47 58 10.747047684   15.7       ~ 94 1
30 NGC 958 Sy2 02 30 42.8187658032 -02 56 20.526742608   13.0   11.81 12.4 ~ 164 0
31 NGC 992 AGN 02 37 25.491 +21 06 03.04   13.5       ~ 144 1
32 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
33 Z 440-4 rG 02 46 17.482 +13 05 44.33   15.2       ~ 141 1
34 IRAS 02438+2122 AGN 02 46 39.192 +21 35 09.38   16.0       ~ 79 0
35 UGC 2369 PaG 02 54 00.9 +14 58 31   14.6       ~ 118 1
36 Z 540-64 Sy2 03 15 01.4292441960 +42 02 08.825019072   15.05 14.18 12.54   ~ 202 1
37 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
38 IRAS 03217+4023 AGN 03 25 05.3343453936 +40 33 30.822573924           ~ 54 0
39 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1987 2
40 IRAS 03359+1523 G 03 38 47.1918750504 +15 32 53.853117504   16.3       ~ 112 0
41 Z 465-12 GiP 03 54 15.9799173288 +15 55 43.217205276   15.3       ~ 84 0
42 NVSS J040232+602040 rG 04 02 32.098 +60 20 37.79           ~ 46 1
43 MCG-03-11-009 Sy1 04 04 29.6945497488 -17 54 16.107321888   15.34   14.10   ~ 36 0
44 Z 418-14 AG? 04 12 22.670 +05 32 49.13   15.50       ~ 170 0
45 MCG-05-11-006 Sy2 04 13 49.699 -32 00 25.20   13.31 13.3 12.14   ~ 106 1
46 NGC 1572 Sy2 04 22 42.814 -40 36 03.50   13.63   12.05   ~ 77 0
47 NVSS J043033+385548 rG 04 30 33.0942391392 +38 55 47.575494372           ~ 50 1
48 LEDA 89985 AG? 04 32 48.605 +29 29 57.88   12.19       ~ 45 1
49 NGC 1614 Sy1 04 34 00.027 -08 34 44.57   14.66 13.99     ~ 697 1
50 UGC 3094 AGN 04 35 33.816 +19 10 18.24   16.5       ~ 77 1
51 ESO 203-1 AGN 04 46 49.4729569488 -48 33 30.480074640   16.40   15.51   ~ 73 0
52 NGC 1667 Sy2 04 48 37.1804579280 -06 19 11.824427712   13.66 12.86 11.72   ~ 384 2
53 MCG-05-12-006 Sy1 04 52 04.9572269280 -32 59 25.682874036   15.16       ~ 68 1
54 NGC 1797 Sy1 05 07 44.883 -08 01 08.57   14.42   13.22   ~ 96 0
55 Z 468-2 Sy2 05 08 19.7062775592 +17 21 48.085162020   15.4       ~ 129 0
56 2MASX J05112587+2445183 G 05 11 25.8846288528 +24 45 18.306876096           ~ 46 0
57 ZW VII 31 rG 05 16 46.44456 +79 40 12.4320   15.8       ~ 159 1
58 LEDA 17035 AGN 05 16 56.091 +51 31 56.17           ~ 44 0
59 HD 34700 Or* 05 19 41.4089390784 +05 38 42.778590864 9.75 9.778 9.659 9.205 8.47 G0IVe 125 0
60 IRAS 05189-2524 Sy2 05 21 01.3994605776 -25 21 45.321827832   15.47 14.75     ~ 545 0
61 IRAS 05187-1017 LIN 05 21 06.544 -10 14 46.18   16.80   15.43   ~ 60 1
62 LEDA 86275 AGN 05 25 16.5 +19 10 46           ~ 40 0
63 MCG+08-11-002 AGN 05 40 43.718 +49 41 41.56   16       ~ 70 1
64 NGC 1961 LIN 05 42 04.6327819680 +69 22 42.411028872   11.73 10.99     ~ 362 3
65 MCG+10-09-002 Sy2 05 45 47.836 +58 42 03.83   16.0       ~ 110 2
66 LEDA 213322 AGN 05 47 11.173 +17 33 46.74           ~ 58 0
67 IRAS 06076-2139 Sy2 06 09 45.7858957392 -21 40 23.614857120   15.64   14.46   ~ 87 1
68 Z 348-14 GiP 06 14 29.619 +80 26 59.47   14.35 13.17     ~ 77 0
69 IC 2163 AG? 06 16 27.9671433048 -21 22 33.133211832   12.55   11.28   ~ 172 2
70 NGC 2146 AGN 06 18 37.710 +78 21 25.27 11.67 11.38 10.59     ~ 765 2
71 PMN J0625-6020 rG 06 25 24.28917 -60 20 29.5066           ~ 14 1
72 ESO 255-7 EmG 06 27 22.588 -47 10 46.45   14.48   13.60   ~ 73 0
73 ESO 557-2 EmG 06 31 47.217 -17 37 17.09   15.03   13.21   ~ 74 1
74 Z 234-34 AGN 06 57 34.4315445816 +46 24 10.334337048   13.7       ~ 86 1
75 IRAS 06592-6313 Sy2 06 59 40.2750782328 -63 17 53.022471360   15.61   14.28   ~ 61 0
76 LEDA 90054 Sy2 07 03 24.2524870728 -60 15 22.448628792   16.02   14.72   ~ 64 1
77 LEDA 3098117 Sy1 07 03 28.588 -60 16 44.11   16.11   14.70   ~ 29 1
78 NGC 2342 AGN 07 09 18.089 +20 38 09.22   12.92 12.15     ~ 132 0
79 NGC 2369 Sy1 07 16 37.753 -62 20 37.51   13.23   11.56 12.3 ~ 137 0
80 2MASS J07273756-0254540 AGN 07 27 37.5366009312 -02 54 54.264024396           ~ 69 0
81 NGC 2388 AGN 07 28 53.4535009080 +33 49 08.554343196   14.7       ~ 145 2
82 Z 58-9 GiG 07 35 43.416 +11 42 35.29   15.0       ~ 79 1
83 XMMSL1 J074008.2-853927 X 07 40 08.2 -85 39 27           ~ 52 0
84 LEDA 90088 AGN 08 37 01.827 -49 54 30.27           ~ 67 0
85 2MASX J08382309+6507160 SBG 08 38 23.093 +65 07 16.05     14.16     ~ 141 2
86 NGC 2623 LIN 08 38 24.016 +25 45 16.29 14.10 13.99 13.36     ~ 533 2
87 ESO 432-6 AG? 08 44 27.2 -31 41 51   16.4       ~ 36 0
88 ESO 60-16 G 08 52 30.77 -69 01 59.8           ~ 45 0
89 IRAS 08572+3915 LIN 09 00 25.38288 +39 03 54.2988     16.66     ~ 450 1
90 NVSS J090412-362700 rG 09 04 12.70392 -36 27 01.1412           ~ 104 1
91 NAME IRAS 09111-1007W Sy2 09 13 36.4577885664 -10 19 30.001760292   15.7 16.10     ~ 93 1
92 NAME IRAS 09111-1007E Sy2 09 13 38.8376397072 -10 19 19.931643264   15.9       ~ 31 1
93 UGC 4881 IG 09 15 55.5 +44 19 58   14.9       ~ 178 0
94 Z 289-11 Sy2 09 35 51.6045544584 +61 21 11.589382368   15.20 15.50     ~ 617 2
95 MCG+08-18-013 GiG 09 36 37.1961237672 +48 28 27.836479740   15.0       ~ 78 1
96 SN 2010jl SN* 09 42 53.33 +09 29 41.8           SNIIn 350 1
97 IC 563 AG? 09 46 20.361 +03 02 43.86   14.7       ~ 101 0
98 NGC 3110 Sy1 10 04 02.12400 -06 28 29.1250   13.4   13.3 12.5 ~ 191 2
99 IC 2545 Sy1 10 06 04.581 -33 53 05.55   15.27 14.27 14.25   ~ 117 0
100 NVSS J102000+081335 rG 10 20 00.1849825704 +08 13 33.648546108   17.5       ~ 167 1
101 NGC 3221 AG? 10 22 19.988 +21 34 10.56   14.3       ~ 151 1
102 MCG-04-25-006 Sy2 10 24 31.4324894928 -23 33 10.567872576   14.45 14.21 12.89   ~ 82 1
103 NGC 3256 Sy2 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 920 2
104 NAME Great Attractor SCG 10 32 -46.0           ~ 617 0
105 ESO 264-36 Sy2 10 43 07.676 -46 12 44.50   14.34   12.55   ~ 84 0
106 MCG-07-23-002 AGN 10 59 01.794 -43 26 25.81   15.02   13.22   ~ 78 0
107 IRAS 10565+2448 LIN 10 59 18.12811 +24 32 34.7357   15.7       ~ 302 0
108 APG 148 IG 11 03 53.89153 +40 50 59.8850   14.29       ~ 190 1
109 SWIFT J1112.2-8238 X 11 11 47.797 -82 38 44.71           ~ 81 0
110 NGC 3597 EmG 11 14 41.9796496464 -23 43 39.573399828   13.62   12.46   ~ 134 1
111 Z 11-76 Sy2 11 21 12.261 -02 59 03.00   15.0       ~ 132 0
112 IC 2810 rG 11 25 45.04728 +14 40 35.8176   15.4       ~ 140 0
113 ESO 319-22 AGN 11 27 54.0785626512 -41 36 52.264754784   14.56   16.21   ~ 69 1
114 IC 694 AG? 11 28 27.312 +58 34 42.29   18.2       ~ 258 2
115 NGC 3690 IG 11 28 31.0 +58 33 41   13.19 12.86     ~ 1015 4
116 NAME Arp 299-B AT1 Rad 11 28 30.9875529 +58 33 40.783601           ~ 39 0
117 NGC 3690B GiP 11 28 31.02 +58 33 40.7   11.8       ~ 635 4
118 MCG-06-26-013 EmG 11 53 11.722 -39 07 48.72   13.30   11.86   ~ 203 1
119 ESO 440-58 IG 12 06 51.8 -31 56 47   15.44   14.89   ~ 64 0
120 IRAS 12112+0305 PaG 12 13 45.98880 +02 48 39.9600           ~ 373 0
121 [CGM90] IRAS 12112+0305 NE rG 12 13 46.10735 +02 48 41.4959           ~ 369 0
122 NGC 4194 rG 12 14 09.615 +54 31 35.93   13.79 13.30     ~ 467 2
123 ESO 267-30 Sy1 12 14 12.839 -47 13 43.42   14.20   12.69 12.9 ~ 84 1
124 LEDA 90166 AGN 12 14 22.0958120832 -56 32 33.317528712   16.8       ~ 66 0
125 6dFGS gJ122503.9-064053 LIN 12 25 03.8941406496 -06 40 52.501670544   15.53       ~ 73 0
126 NGC 4355 Sy2 12 26 54.6206739120 -00 52 39.421212996   14.21 13.37     ~ 527 2
127 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
128 NGC 4575 EmG 12 37 51.119 -40 32 14.66   13.13 13.06 11.93 12.4 ~ 76 1
129 ZW VIII 211 rG 12 48 15.2253025968 +17 46 26.475426228   16.5       ~ 360 0
130 Z 294-4 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2096 3
131 IGR J12580+0134 gam 12 58 05.1 +01 34 26           ~ 50 0
132 NGC 4922N Sy2 13 01 25.2660290577 +29 18 49.879144069   15.60 14.67 13.85   ~ 265 5
133 Z 43-99 rG 13 01 50.29128 +04 20 00.4488   15.5       ~ 91 0
134 MCG-02-33-098 AG? 13 02 19.5 -15 46 05   14       ~ 96 0
135 MCG-04-31-023 Sy1 13 02 52.3177169808 -23 55 17.932558692   14.77 14.78 13.24 13.59 ~ 131 1
136 NAME Shapley Supercluster SCG 13 06.0 -33 04           ~ 677 0
137 2MASX J13081875-5727300 GiG 13 08 18.754 -57 27 30.09   16.4       ~ 49 0
138 IC 860 LIN 13 15 03.51 +24 37 07.8   14.8       ~ 236 0
139 2MASX J13150638-5509225 Sy2 13 15 06.33480 -55 09 22.7736   17.3       ~ 172 0
140 MCG+10-19-056 AGN 13 15 35.103 +62 07 28.43   15       ~ 120 1
141 IC 883 SBG 13 20 35.37960 +34 08 21.8400   14.8       ~ 421 1
142 NGC 5104 AGN 13 21 23.11513 +00 20 33.3820   14.5   13.227   ~ 169 1
143 MCG-03-34-064 Sy2 13 22 24.4583154360 -16 43 42.481822404   14   13.16   ~ 345 2
144 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 500 1
145 ESO 173-15 AGN 13 27 23.774 -57 29 22.14   14.9   14.3 13.7 ~ 81 1
146 IC 4280 Sy1 13 32 53.390 -24 12 25.83   13.48   12.17 15.22 ~ 86 1
147 NGC 5256 PaG 13 38 17.81 +48 16 41.2   14.1 13.42     ~ 449 1
148 NGC 5257 H2G 13 39 52.92781 +00 50 24.0903   13.7 12.99     ~ 208 0
149 NGC 5258 GiP 13 39 57.6768310848 +00 49 51.009668076   13.8 12.83     ~ 186 0
150 Z 271-60 Sy2 13 44 42.1883001099 +55 53 13.596220922   15.68 14.91     ~ 958 3
151 Z 190-60 AGN 13 49 13.912 +35 15 27.04   14.7       ~ 128 1
152 ESO 221-10 Sy2 13 50 56.924 -49 03 19.72   12.96 11.93 11.75 12.7 ~ 84 1
153 NGC 5331 GiP 13 52 16.289 +02 06 04.18           ~ 97 0
154 NGC 5394 H2G 13 58 33.6405096192 +37 27 12.732147036   13.7 13.12     ~ 215 2
155 NGC 5433 G 14 02 36.06453 +32 30 37.5440   14.0       ~ 97 1
156 Z 247-20 AGN 14 19 43.2275567784 +49 14 12.014867004   15.4       ~ 141 1
157 NGC 5653 AGN 14 30 10.4187147048 +31 12 55.568509596   12.7       ~ 184 1
158 LEDA 52270 Sy1 14 37 38.2867288488 -15 00 24.087592692   16.58 16.40     ~ 300 2
159 LEDA 89507 Sy2 14 40 59.0135478768 -37 04 31.938829896   17.72   16.48   ~ 131 1
160 NGC 5734 Sy2 14 45 09.0364267176 -20 52 13.484556696   13.75   12.08   ~ 89 1
161 MCG-06-32-018 Sy1 14 46 10.309 -37 41 06.73   13.67   12.52   ~ 40 2
162 MCG+04-35-018 GiP 14 57 00.3205510752 +24 36 24.138336996   14.3 15.3     ~ 83 0
163 IC 4518 Sy2 14 57 45.6 -43 07 58   14.5       ~ 81 0
164 Z 49-57 rG 15 13 13.1083645335 +07 13 32.099256087   15.5       ~ 252 1
165 Z 221-50 SyG 15 18 06.1187 +42 44 45.086   15.0 15     ~ 239 1
166 ESO 99-4 G 15 24 58.217 -63 07 34.43   16.4       ~ 51 0
167 2MASX J15265942+3558372 LIN 15 26 59.44451 +35 58 37.0521   15.61       ~ 295 1
168 NGC 5936 AGN 15 30 00.846 +12 59 21.55   13.0       ~ 179 1
169 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
170 NGC 5990 Sy2 15 46 16.3702704024 +02 24 55.693907820   13.1       ~ 158 1
171 NGC 6000 Sy2 15 49 49.556 -29 23 12.50   13.02   11.27 12.0 ~ 116 1
172 NGC 6052 rG 16 05 12.8715178104 +20 32 32.607297132 13.01 13.44 13.00     ~ 362 2
173 NGC 6090 PaG 16 11 40.3 +52 27 21   14.0       ~ 446 1
174 IRAS 16164-0746 Sy1 16 19 11.792 -07 54 02.61   15.49       ~ 88 1
175 AT 2017gge ev 16 20 34.86 +24 07 25.6           ~ 30 0
176 Z 52-37 AGN 16 30 56.539 +04 04 58.36   14.9       ~ 113 1
177 NGC 6156 AGN 16 34 52.5448490040 -60 37 07.867951500   12.30   11.05 12.0 ~ 85 0
178 ESO 69-6 AGN 16 38 11.85408 -68 26 08.1888   16.16   14.83   ~ 72 2
179 LEDA 58817 Sy1 16 42 40.1747908920 -09 43 18.848119476   16.77       ~ 106 1
180 SWIFT J164449.3+573451 G 16 44 47.81184000 +57 35 00.7113480           ~ 533 0
181 ESO 453-5 EmG 16 47 31.0738092240 -29 21 21.125984148   16.8       ~ 52 1
182 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
183 2MASX J16542402-0953212 EmG 16 54 24.0337546992 -09 53 20.786386668   16.55       ~ 65 1
184 NGC 6286 AGN 16 58 31.3566512040 +58 56 10.114753560   14.2       ~ 202 1
185 NVSS J171420+531028 rG 17 14 20.4740967144 +53 10 31.495916892           ~ 97 1
186 IRAS 17138-1017 Sy2 17 16 35.83992 -10 20 38.9832   17.43   14.59   ~ 143 0
187 LEDA 60189 LIN 17 23 21.96264 -00 17 00.8088   15.1       ~ 454 0
188 ESO 138-27 AG? 17 26 43.352 -59 55 55.17   13.74   12.64 13.7 ~ 63 0
189 Z 83-25 AG? 17 49 06.2036 +13 19 55.580   15.5       ~ 17 1
190 Z 199-27 AGN 17 54 51.7605214584 +34 46 34.575409236   13.9       ~ 107 0
191 Z 141-34 AGN 17 56 56.6307158664 +24 01 01.979013000   15.7       ~ 60 0
192 2MFGC 14160 GiG 18 00 31.919 -04 00 53.36   17.62       ~ 69 0
193 2MASX J18113842+0131397 G 18 11 38.4206790528 +01 31 40.049832180           ~ 62 0
194 NGC 6621 AG? 18 12 55.276 +68 21 48.50   13.6       ~ 129 1
195 IC 4686 AG? 18 13 38.7810951072 -57 43 57.306382932   14.67   13.52   ~ 71 1
196 IC 4687 AGN 18 13 39.829 -57 43 31.25   14.35 14.3 12.78   ~ 143 2
197 Z 142-34 GiG 18 16 40.657 +22 06 46.23   15.6       ~ 49 0
198 LEDA 84885 Sy1 18 32 41.177 -34 11 27.46   15.63   13.66   ~ 142 1
199 NGC 6670 PaG 18 33 35.45 +59 53 19.7           ~ 70 1
200 IC 4734 AGN 18 38 25.6846404504 -57 29 25.078201116   14.21   12.71   ~ 95 0
201 NGC 6701 AGN 18 43 12.429 +60 39 12.13   12.9       ~ 142 1
202 NGC 6745 AG? 19 01 41.192 +40 44 37.34   13.3       ~ 81 1
203 NGC 6786 Sy2 19 10 53.928 +73 24 36.20   13.7       ~ 80 1
204 Z 341-20 G 19 11 04.67 +73 25 36.0   15.1       ~ 40 0
205 ESO 593-8 rG 19 14 31.09656 -21 19 08.7564   14.70   13.70   ~ 88 2
206 NVSS J193222-040000 rG 19 32 22.2962473608 -04 00 01.797249204   18.85   17.04   ~ 122 0
207 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2
208 LEDA 166649 AGN 19 56 35.7922773768 +11 19 05.126583432           ~ 65 0
209 MCG-06-43-014 Sy2 19 57 37.522 -37 56 08.61   14.55       ~ 88 1
210 NGC 6907 AG? 20 25 06.63 -24 48 33.0   11.91 11.30 10.47 11.3 ~ 189 2
211 MCG+04-48-002 Sy2 20 28 35.061 +25 44 00.18   18       ~ 164 1
212 NGC 6926 Sy2 20 33 06.1084582704 -02 01 38.498909376   14.87 13.87 13.0 12.5 ~ 172 2
213 LEDA 90367 AGN 20 37 17.72304 +25 31 37.6968           ~ 58 0
214 PS1-1000789 SN* 20 42 44.7490 +15 30 32.240           SNIIn 39 0
215 2MASX J20570298+1412165 G 20 57 02.9650698480 +14 12 16.295014080           ~ 162 0
216 Z 448-20 G 20 57 23.62800 +17 07 44.5980   15.2       ~ 190 0
217 ESO 286-19 LIN 20 58 26.8183783008 -42 38 59.411838156   14.79 14.79 14.20   ~ 318 0
218 MCG-07-43-014 AGN 21 04 11.162 -43 35 32.51   14.42   13.47 13.9 ~ 72 0
219 NVSS J211129+582307 rG 21 11 29.30016 +58 23 07.8324           ~ 53 0
220 MCG-07-44-026 EmG 21 36 10.5851750568 -38 32 42.911473128   14.59 13.38 13.27   ~ 87 1
221 NGC 7130 Sy2 21 48 19.5412287192 -34 57 04.492024884   12.86 13.87 11.57   ~ 483 1
222 ASASSN -15lh ev 22 02 15.4 -61 39 34           ~ 187 1
223 Z 530-8 GiG 22 04 36.218 +42 19 37.50   15.7       ~ 55 1
224 MCG-05-52-054 AGN 22 14 39.9349430736 -27 27 50.374899936   13.37   12.32 13.1 ~ 88 0
225 IC 5179 Sy1 22 16 09.1191653256 -36 50 37.117603752   12.29 11.89 11.38   ~ 214 1
226 NGC 7253 AG? 22 19 27.700 +29 23 44.85   14.4       ~ 88 0
227 MCG-03-57-017 Sy1 22 31 25.474 -19 02 04.27   14.27 13.73 12.90   ~ 123 1
228 Z 514-93 AGN 22 41 12.275 +34 14 56.28   15.0       ~ 99 1
229 ESO 239-2 AGN 22 49 39.8505632256 -48 50 58.076200284   14.46       ~ 80 0
230 NAME South America rG 22 51 49.27872 -17 52 24.0600   16.97       ~ 348 3
231 NGC 7469 Sy1 23 03 15.6 +08 52 26 12.60 13.00 12.34     ~ 2253 3
232 Z 453-62 AGN 23 04 56.514 +19 33 07.86   15.2       ~ 117 0
233 ESO 148-2 Sy2 23 15 46.76280 -59 03 15.6924   14.94 14.73 13.95   ~ 289 1
234 IC 5298 Sy2 23 16 00.6756811155 +25 33 24.081139422   15.0       ~ 205 0
235 NGC 7552 Sy1 23 16 10.66 -42 35 04.7 11.34 11.22 10.57 10.08 11.1 ~ 574 3
236 NGC 7591 SyG 23 18 16.2727927344 +06 35 09.108933504   13.8       ~ 285 1
237 NGC 7592W Sy2 23 18 21.8077569718 -04 24 56.904279971     15.0     ~ 175 0
238 NGC 7592 IG 23 18 22.2 -04 24 57           ~ 177 0
239 ESO 77-14 IG 23 21 03.5561888880 -69 13 01.088615424   16.52   15.27   ~ 59 0
240 [UPA88] NGC 7674 E Rad 23 27 56.68 +08 46 44.1           ~ 4 0
241 NGC 7674 Sy1 23 27 56.6973043968 +08 46 44.253707772 13.84 13.92 13.23 12.64   ~ 738 2
242 NGC 7679 Sy2 23 28 46.6613717400 +03 30 41.013578196   13.2       ~ 289 1
243 LEDA 90429 SyG 23 39 01.26960 +36 21 08.5896   16.17       ~ 232 1
244 MCG-01-60-022 Sy2 23 42 00.8439651072 -03 36 54.634148712   14.5 14.6     ~ 89 0
245 AT 2017gbl ? 23 46 05.530 +53 14 01.06           ~ 15 0
246 NVSS J234605+531359 rG 23 46 05.7217380192 +53 13 56.609577840           ~ 60 1
247 NGC 7752 GiP 23 46 58.557 +29 27 32.17   14.3       ~ 139 0
248 NGC 7771 GiG 23 51 24.880 +20 06 42.57 13.42 13.08 12.25     ~ 350 3
249 Z 455-59 AGN 23 51 26.731 +20 35 10.22   14.9       ~ 237 0

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