2012ApJ...750..138M


Query : 2012ApJ...750..138M

2012ApJ...750..138M - Astrophys. J., 750, 138 (2012/May-2)

The WISE gamma-ray strip parameterization: the nature of the gamma-ray active galactic nuclei of uncertain type.

MASSARO F., D'ABRUSCO R., TOSTI G., AJELLO M., GASPARRINI D., GRINDLAY J.E. and SMITH H.A.

Abstract (from CDS):

Despite the large number of discoveries made recently by Fermi, the origins of the so-called unidentified γ-ray sources remain unknown. The large number of these sources suggests that there could be a population among them that significantly contributes to the isotropic gamma-ray background and it is therefore crucial to understand their nature. The first step toward a complete comprehension of the unidentified γ-ray source population is to identify those that can be associated with blazars, the most numerous class of extragalactic sources in the γ-ray sky. Recently, we discovered that blazars can be recognized and separated from other extragalactic sources using the infrared (IR) WISE satellite colors. The blazar population delineates a remarkable and distinctive region of the IR color-color space, the WISE blazar strip. In particular, the subregion delineated by the γ-ray emitting blazars is even narrower and we named it the WISE Gamma-ray Strip (WGS). In this paper, we parameterize the WGS on the basis of a single parameter s that we then use to determine if γ-ray active galactic nuclei of the uncertain type (AGUs) detected by Fermi are consistent with the WGS and can be considered blazar candidates. We find that 54 AGUs out of a set of 60 analyzed have IR colors consistent with the WGS; only 6 AGUs are outliers. This result implies that a very high percentage (i.e., in this sample about 90%) of the AGUs detected by Fermi are indeed blazar candidates.

Abstract Copyright:

Journal keyword(s): BL Lacertae objects: general - galaxies: active - gamma rays: general - radiation mechanisms: non-thermal

Simbad objects: 46

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Number of rows : 46
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 ICRF J015631.4+391430 BLL 01 56 31.41013794 +39 14 30.9234946           ~ 43 1
2 QSO J0253+3217 Bz? 02 53 33.65014202 +32 17 20.8918653           ~ 44 1
3 LAMOST J033349.00+291631.6 BLL 03 33 49.000 +29 16 31.51           ~ 37 1
4 QSO B0437-454 QSO 04 39 00.85466368 -45 22 22.5631875   20.44 20.6 19.48   ~ 90 0
5 9Y-MST J0439-3201 BLL 04 39 33.90 -32 10 10.5           ~ 28 1
6 ICRF J044021.1+143756 QSO 04 40 21.13939074 +14 37 56.9512334           ~ 41 1
7 87GB 045310.1+265754 Bla 04 56 17.365822 +27 02 21.15673           ~ 26 1
8 9Y-MST J0531-4827 BLL 05 31 58.6155149088 -48 27 35.991354960           ~ 43 0
9 2FGL J0532.5-7223 Bz? 05 33 44.71018 -72 16 24.3131       22.63   ~ 21 1
10 2FGL J0537.7-5716 BLL 05 37 48.9538387032 -57 18 30.099289860 17.85 17.77 17.34     ~ 39 0
11 2FGL J0538.5-3909 BLL 05 38 10.33 -39 08 44.2 19.24 19.22       ~ 33 0
12 LEDA 2436236 BLL 06 02 00.4452373872 +53 16 00.045905232           ~ 32 1
13 WISEA J060408.61-481725.1 BLL 06 04 09.40 -48 17 26.1 17.96 17.91 17.79     ~ 40 0
14 3FHL J0604.9+0000 BLL 06 04 58.42 +00 00 43.2           ~ 21 0
15 2FGL J0609.4-0248 BLL 06 09 15.00 -02 47 54.2           ~ 32 0
16 PSR J0622+3749 Psr 06 22 10.411 +37 49 14.60           ~ 37 1
17 3FHL J0734.8-7711 QSO 07 34 43.41962 -77 11 13.4864   21.6   20.77   ~ 47 1
18 7C 081936.70+405132.00 Bla 08 22 57.55595483 +40 41 49.7667568   19.48 19.20     ~ 76 1
19 6C 102716+745713 BLL 10 31 22.0246130736 +74 41 58.344586116     17.2 13.6   ~ 64 1
20 ACO 3541 ClG 13 03 41.8 -24 15 06           ~ 24 0
21 9Y-MST J1304-2412 BLL 13 03 42.521 -24 14 42.81   16.95   15.83   ~ 32 1
22 2MASS J13042100-4353102 BLL 13 04 21.0058097184 -43 53 10.199729472 16.09 15.84 15.71     ~ 57 0
23 [VV98] J135147.0-291219 QSO 13 51 46.83883451 -29 12 17.6513730   20.0   19.4   ~ 61 1
24 2FGL J1407.5-4257 BLL 14 07 39.72090 -43 02 31.9386           ~ 38 0
25 QSO B1413+135 BLL 14 15 58.81751033 +13 20 23.7128587   21.055 20.000 18.461   ~ 409 1
26 2FGL J1419.4+7730 BLL 14 19 00.5 +77 32 27           ~ 37 0
27 9Y-MST J1419-0838 Bla 14 19 22.56 -08 38 32.2           ~ 33 0
28 2MASX J15180359-2731306 BLL 15 18 03.6003266832 -27 31 31.191934728           ~ 42 1
29 RX J155330.0-242223 QSO 15 53 31.62781399 -24 22 06.0360491           ~ 52 1
30 AT20G J155736-704028 BLL 15 57 36.16242 -70 40 28.1028           ~ 21 0
31 6C 160910+851811 BLL 16 00 31.7015730423 +85 09 49.180136269           ~ 27 1
32 9Y-MST J1724-7715 Bla 17 23 50.81 -77 13 50.5           ~ 36 1
33 2FGL J1753.8-5012 BLL 17 53 38.52 -50 15 14.4           ~ 26 0
34 ICRF J175858.4-482112 BLL 17 58 58.45724247 -48 21 12.5221399           ~ 27 0
35 2FGL J1816.7-4942 AGN 18 16 55.99425 -49 43 44.6729           ~ 28 1
36 3FHL J1819.2+2135 BLL 18 19 05.2174047552 +21 32 33.819296100           ~ 25 1
37 QSO B1821-525 QSO 18 25 13.8085148136 -52 30 58.288523544   19.2       ~ 37 1
38 87GB 182712.0+272717 BLL 18 29 14.009 +27 29 03.09           ~ 20 0
39 3FHL J1830.0+1323 BLL 18 30 00.7622361288 +13 24 14.327147592           ~ 26 1
40 ICRF J185819.0-251050 QSO 18 58 19.07778803 -25 10 50.7154637           ~ 31 1
41 2FGL J1913.4+4440 BLL 19 14 01.870 +44 38 33.68           ~ 24 0
42 6C 194425+834912 Bla 19 37 39.65277925 +83 56 29.0070138           ~ 29 1
43 QSO B1936-623 QSO 19 41 21.76858343 -62 11 21.0567014   22.5       ~ 62 1
44 ICRF J194126.9+722142 Bla 19 41 26.98469095 +72 21 42.2235118           ~ 40 0
45 2FGL J1959.6-2931 Bla 20 00 16.90 -29 30 26.0       17.8   ~ 19 0
46 2FGL J2103.6-6236 BLL 21 03 38.39385 -62 32 25.9176 16.91 16.65 16.56     ~ 37 0

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2023.01.28-11:33:44

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