1994A&A...284...28M

Query : 1994A&A...284...28M

1994A&A...284...28M - Astronomy and Astrophysics, volume 284, 28-32 (1994/4-1)

AGN emission above 20 keV: the hard X-ray detection problem.

MAISACK M., WOOD K.S. and GRUBER D.E.

Abstract (from CDS):

We have searched the HEAO-4 LED all-sky survey database (13-180 keV) for a class of AGN that is most likely to emit X-rays at energies of ∼ 50 keV and above, as a basis for further studies with the Compton Gamma Ray Observatory (CGRO). We have overlayed the survey signals of several samples of AGN-quasars, BL Lacs and Seyfert galaxies - with individual source flux below a significance of 3σ. The objects were selected by their prominence and properties at other wavelengths, and in Einstein observations and the HEAO-A1 survey. We find no significant signal at hard X-rays from any of the chosen classes of radio- loud QSOs and BL Lacs. We find a signal from Seyfert 1 galaxies up to 80 keV compatible with the canonical energy index α=0.7.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - X-rays: galaxies - γ-ray: observations

Simbad objects: 57

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Number of rows : 57
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 1H 0016-257 QSO 00 19 09.27 -25 30 50.8           ~ 4 0
2 2C 26 BLL 00 20 25.2231670656 +15 40 54.774271884   17.92 17.62     ~ 342 1
3 4C -02.04B QSO 00 41 26.0088824640 -01 43 15.682809108   16 15.0     ~ 96 2
4 NGC 262 Sy2 00 48 47.14147900 +31 57 25.0845702 14.04 13.90 13.06 8.53   ~ 734 3
5 QSO B0048-09 BLL 00 50 41.3172421464 -09 29 05.210474100 16.74 16.39 16.22 16.14   ~ 459 2
6 ESO 113-45 Sy1 01 23 45.7631533440 -58 48 20.808928944   14.08 13.83 13.34   ~ 880 0
7 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2813 2
8 QSO B0138-097 BLL 01 41 25.83216015 -09 28 43.6742470   16.94 16.55 17.21   ~ 281 3
9 Mrk 573 Sy2 01 43 57.7777898304 +02 20 59.531401716   14.90 14.07     ~ 533 0
10 QSO B0208-512 BLL 02 10 46.2004407600 -51 01 01.893013392   17.10 16.93 14.82   ~ 447 1
11 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4598 2
12 1H 0355-116 X 03 57 27 -11 29.1           ~ 3 0
13 QSO B0420-0127 QSO 04 23 15.80072217 -01 20 33.0656073   17.50 17.00 16.28   ~ 1207 3
14 WISEA J042840.41-375619.3 BLL 04 28 40.4241894720 -37 56 19.580735832   18.96 19.0 17.21   ~ 306 1
15 FRL 303 Sy1 04 30 40.0329717936 -53 36 55.640614860 15.90 16.00 15.6 12.4   ~ 50 0
16 QSO B0454-463 QSO 04 55 50.77248730 -46 15 58.6797903   17.89 17.4 16.87   ~ 217 1
17 NGC 1808 Sy2 05 07 42.343 -37 30 46.98 11.05 10.80 9.94 9.36 10.2 ~ 721 3
18 4C 22.21 BLL 08 23 24.7592164368 +22 23 03.287299236   20.22 19.57 19.7   ~ 180 1
19 QSO B0823+033 BLL 08 25 50.33835759 +03 09 24.5199749   17.81 17.23 16.91   ~ 328 1
20 LB 9308 Sy1 09 06 31.8732919056 +16 46 11.785679112   18.48 18.27     ~ 298 3
21 Mrk 705 Sy1 09 26 03.2694421008 +12 44 03.732389268   15.15 14.60     ~ 326 0
22 ICRF J095738.1+552257 Sy1 09 57 38.1839604096 +55 22 57.754950636   18.24 17.89     ~ 434 1
23 ICRF J103059.0+310255 Sy1 10 30 59.0936990784 +31 02 55.723145964   17.07 16.71 16.1   ~ 187 1
24 4C 12.37 QSO 10 42 44.6052783816 +12 03 31.263917976   18.03 17.77     ~ 440 2
25 QSO B1144-3755 BLL 11 47 01.37071212 -38 12 11.0235229   19.03 16.2 16.72   ~ 299 1
26 4C -00.47 QSO 11 50 43.8706351104 -00 23 54.203006868   17.51 17.38 17.1   ~ 367 1
27 NGC 4593 Sy1 12 39 39.4435107024 -05 20 39.034988448   13.95 13.15     ~ 1089 0
28 US 371 BLL 13 10 28.66385420 +32 20 43.7828340   15.61 15.24 17.91   ~ 852 1
29 ESO 383-35 Sy1 13 35 53.7691256160 -34 17 44.160716796   13.89 13.61 8.9   ~ 1482 0
30 Mrk 273 Sy2 13 44 42.1781 +55 53 12.819   15.68 14.91     ~ 912 3
31 ESO 445-50 Sy1 13 49 19.2601801224 -30 18 34.213815504   13.81 13.66 12.18 12.35 ~ 803 0
32 Mrk 279 Sy1 13 53 03.4348964112 +69 18 29.410910460   15.15 14.46     ~ 761 0
33 Mrk 463 Sy2 13 56 02.9 +18 22 18   14.8 14.22     ~ 389 2
34 3C 298.0 QSO 14 19 08.1802187928 +06 28 34.802854680   17.12 16.79     ~ 407 1
35 QSO B1426+428 BLL 14 28 32.6090008440 +42 40 21.048123396   16.95 16.45 14.4   ~ 518 2
36 Mrk 1383 Sy1 14 29 06.5720038632 +01 17 06.155007252   15.21 14.87     ~ 462 0
37 Mrk 841 Sy1 15 04 01.1935384104 +10 26 15.780409692   14.50 14.27     ~ 649 0
38 QSO B1504-167 QSO 15 07 04.78696269 -16 52 30.2671543   18.40 18.50 17.00   ~ 230 1
39 4C -05.64 QSO 15 10 53.59142427 -05 43 07.4175000   17.44 17.21     ~ 229 1
40 QSO J1512-0906 Bla 15 12 50.53293048 -09 05 59.8297908   16.74 16.54     ~ 1316 1
41 ICRF J155043.5+112047 Sy1 15 50 43.5947388984 +11 20 47.453985024   17.47 17.23 16.5   ~ 173 3
42 IC 5063 Sy2 20 52 02.15 -57 04 06.7   12.92 13.60 11.30   ~ 648 1
43 QSO B2106-413 QSO 21 09 33.18859274 -41 10 20.6054240   20.20 21.0 20.41   ~ 106 1
44 QSO B2128-123 BLL 21 31 35.2617909696 -12 07 04.795364172   16.33 16.11 15.87   ~ 455 1
45 4C -02.81 BLL 21 34 10.30958988 -01 53 17.2389056   18.6 19.00 18.87   ~ 382 1
46 PHL 1627 blu 21 34.6 -01 15   16.7       ~ 2 0
47 4C 06.69 Bla 21 48 05.45866779 +06 57 38.6041877   16.85 16.47 15.06   ~ 676 1
48 3C 446 BLL 22 25 47.25929101 -04 57 01.3907626   18.83 18.39 16.3   ~ 830 1
49 4C 11.69 Bla 22 32 36.40890093 +11 43 50.9040592   17.75 17.33     ~ 1119 2
50 UGC 12163 Sy1 22 42 39.3363009144 +29 43 31.302092640   14.86 14.16     ~ 697 1
51 QSO J2246-1206 QSO 22 46 18.23197022 -12 06 51.2775983   16.63 16.45 15.99   ~ 283 1
52 QSO B2245-328 QSO 22 48 38.68573790 -32 35 52.1881477   18.38 18.6 18.63   ~ 121 1
53 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 2845 2
54 LEDA 70504 Sy1 23 07 02.9147133288 +04 32 57.101475624   16.32 15.50     ~ 117 0
55 NGC 7582 Sy2 23 18 23.60 -42 22 13.3 11.62 10.92 10.62     ~ 905 2
56 NGC 7674 Sy2 23 27 56.6973043968 +08 46 44.253707772 13.84 13.92 13.23 12.64   ~ 699 4
57 QSO B2345-167 QSO 23 48 02.60851466 -16 31 12.0222546   18.00 18.41 16.86   ~ 405 1

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