2022MNRAS.515.4505M

Query : 2022MNRAS.515.4505M

2022MNRAS.515.4505M - Mon. Not. R. Astron. Soc., 515, 4505-4513 (2022/September-3)

Very-high-energy flat spectral radio quasar candidates.

MALIK Z., SAHAYANATHAN S., SHAH Z., IQBAL N. and MANZOOR A.

Abstract (from CDS):

The attenuation of very-high-energy (VHE) photons by the extragalactic background light (EBL) prevents the observation of high-redshift flat spectrum radio quasars (FSRQs). However, the correlation of the VHE spectral index with source redshift suggests that the EBL intensity may be less than what is predicted. This deviation can draw new constraints on the opacity of the Universe to VHE gamma-rays. Therefore, more FSRQs may fall above the sensitivity of the forthcoming VHE telescopes than the ones predicted by the existing EBL models. In order to account for the lower EBL intensity predicted by the index-redshift correlation, we introduce a redshift-dependent correction factor to the opacity, estimated from a commonly used cosmological EBL model. Considering this modified opacity, we identify the plausible VHE FSRQ candidates by linearly extrapolating the Fermi gamma-ray spectrum at 10 GeV to the VHE regime. Our study suggests that among 744 FSRQs reported in the Fermi Fourth Catalogue Data Release 2, 32 FSRQs will be detectable by the Cherenkov Telescope Array Observatory (CTAO). Because FSRQs are proven to be highly variable, we assume a scenario where the average Fermi gamma-ray flux increases by a factor of 10, and this predicts an additional 90 FSRQs that can be detected by the CTAO.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): galaxies: active - cosmic background radiation - gamma-rays: galaxies

Simbad objects: 123

goto Full paper

goto View the references in ADS

Number of rows : 123
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 PKS J0038-2459 Bla 00 38 14.73550152 -24 59 02.2352926   18.90   17.14   ~ 145 1
2 SDSS J004348.84+342626.1 Bla 00 43 48.8431545768 +34 26 26.091802608       19.9   ~ 78 1
3 QSO B0047-051 Bla 00 50 21.5351538408 -04 52 20.592096492   18.5   18.59   ~ 84 1
4 7C 0059+5808 Bla 01 02 45.76237340 +58 24 11.1366164   20.09 19.22 18.57 17.90 ~ 262 1
5 4C 01.02 Bla 01 08 38.77110544 +01 35 00.3171844   18.54 18.39 19.05   ~ 589 1
6 4C 31.03 Bla 01 12 50.3328920232 +32 08 17.435303556     18.0 18.1   ~ 140 1
7 6C 011029+493221 Bla 01 13 27.00680467 +49 48 24.0432101   18.4 18.4 17.80   ~ 130 1
8 QSO B0113-1152 Bla 01 16 12.52201438 -11 36 15.4344705   18.5 18.5 17.72   ~ 204 1
9 QSO B0116-219 Bla 01 18 57.26217841 -21 41 30.1402631   19.40 19.0 19.37   ~ 144 1
10 [VV2006] J012841.4+443917 Bla 01 28 41.3391 +44 39 18.092       19.5   ~ 37 1
11 QSO B0130-17 Bla 01 32 43.48746292 -16 54 48.5220804   18.75 18.44 15.44   ~ 247 1
12 QSO B0131-522 Bla 01 33 05.76250002 -52 00 03.9454078   18.68 20.3 18.63   ~ 129 1
13 6C 013354+473615 Bla 01 36 58.59480326 +47 51 29.1000720     19.50 19.25 15.21 ~ 537 1
14 ICRF J020626.0-115039 Bla 02 06 26.08473482 -11 50 39.7243034       19.46   ~ 84 1
15 QSO B0208-512 BLL 02 10 46.2004407600 -51 01 01.893013392   17.10 16.93 14.82   ~ 485 1
16 QSO J0217+0144 Bla 02 17 48.95475095 +01 44 49.6990271   16.74 16.09 18.51 13.29 ~ 455 1
17 6C 021803+354230 BLL 02 21 05.4920852208 +35 56 13.848581904   20.0 20.0 19.60   ~ 603 3
18 QSO B0235-618 Bla 02 36 53.24574011 -61 36 15.1835463   18.18 18.5 17.62   ~ 117 1
19 4C 28.07 Bla 02 37 52.40567519 +28 48 08.9899986     19.30 16.99   ~ 654 1
20 ICRF J025247.9-221925 Bla 02 52 47.95365568 -22 19 25.4659009       19.83   ~ 130 1
21 QSO J0253+3217 Bz? 02 53 33.65014202 +32 17 20.8918653           ~ 74 1
22 QSO B0256+075 Bla 02 59 27.07662321 +07 47 39.6429924   18 18 16.9   ~ 210 1
23 LBQS 0310+0122 Bla 03 12 43.60323268 +01 33 17.5650710     18.5 18.04   ~ 116 1
24 QSO B0336-0156 Bla 03 39 30.93778633 -01 46 35.8041892   18.96 18.41 17.33   ~ 598 1
25 QSO B0346-279 Bla 03 48 38.14457039 -27 49 13.5657855   20.08 18.63 17.72   ~ 219 1
26 QSO B0420-0127 Bla 04 23 15.80072217 -01 20 33.0656073   17.50 17.00 16.28   ~ 1263 3
27 QSO B0440-003 Bla 04 42 38.66072366 -00 17 43.4209582   19.59 19.22 17.85   ~ 433 1
28 4FGL J0449.2+6329 AG? 04 49 16.4 +63 29 40           ~ 21 0
29 QSO J0457-2324 Bla 04 57 03.1791422424 -23 24 52.021129572   18.85 18.5 16.56   ~ 435 1
30 QSO B0502+049 Bla 05 05 23.18472514 +04 59 42.7245008   18.7 19.0 17.58   ~ 188 1
31 ICRF J050927.4+101144 Bla 05 09 27.45706676 +10 11 44.6001432   19.5       ~ 101 1
32 QSO B0507+179 Bla 05 10 02.36912937 +18 00 41.5815635   20.0 19.0 19.09   ~ 470 1
33 QSO B0514-459 Bla 05 15 45.2501347656 -45 56 43.198786536   18.18 17.5 17.31   ~ 132 1
34 QSO B0524-485 Bla 05 26 16.67131784 -48 30 36.7919695     20.0 19.36   ~ 107 1
35 QSO B0529+075 Bla 05 32 38.9985483000 +07 32 43.344156480   19.0 19.00 17.50   ~ 252 1
36 AT20G J053340-832439 Bla 05 33 38.36143 -83 24 35.7331       20   ~ 57 1
37 6C 065044+451825 Bla 06 54 23.71365373 +45 14 23.5454988     21.00 19.76   ~ 157 1
38 ICRF J070945.0-025517 QSO 07 09 45.05460861 -02 55 17.4966271           ~ 44 0
39 7C 071604.59+331243.00 BLL 07 19 19.41966120 +33 07 09.7087082   17.66 17.05     ~ 130 1
40 4C 14.23 BLL 07 25 16.80776465 +14 25 13.7465925       17.48   ~ 170 1
41 QSO J0730-116 Bla 07 30 19.11247452 -11 41 12.6006642     20.30 20.3   ~ 323 1
42 QSO B0736+01 Bla 07 39 18.03389906 +01 37 04.6177501   16.90 16.47 16.19   ~ 738 1
43 6C 073840+545153 BLL 07 42 39.79069953 +54 44 24.6671050     16.90     ~ 138 1
44 QSO B0745+241 Bla 07 48 36.10928140 +24 00 24.1099425   19.70 18.89 17.88   ~ 239 1
45 QSO B0805-077 Bla 08 08 15.53603763 -07 51 09.8865298     19.80 16.71   ~ 291 1
46 BWE 0826+0908 Bla 08 29 30.3184983324 +08 58 21.292947420     21.5     ~ 47 1
47 [VV98] J085009.6-121334 Bla 08 50 09.63563375 -12 13 35.3761390     16.80 16.02   ~ 162 1
48 QSO B0907-023 Bla 09 09 44.9240838552 -02 31 30.358736220   19.1 18.56 18.2   ~ 92 1
49 6C 091739+622838 Bla 09 21 36.23107643 +62 15 52.1803510   19.76 19.26 18.96   ~ 394 1
50 ICRF J092223.6-052907 BLL 09 22 23.67286563 -05 29 07.1830171       18.60   ~ 57 1
51 4C 55.17 Bla 09 57 38.1839604096 +55 22 57.754950636   18.24 17.89     ~ 459 1
52 QSO B1004-217 Bla 10 06 46.4138565672 -21 59 20.411032848   17.05 16.89 16.29   ~ 111 1
53 QSO J1016+0513 Bla 10 16 03.13647602 +05 13 02.3413146   20.26 19.83 20   ~ 162 1
54 7C 1030+4131 Bla 10 33 03.70787172 +41 16 06.2329333   20.01 19.64 19.97   ~ 234 1
55 6C 103031+610629 Bla 10 33 51.4290959304 +60 51 07.334442756   19.31 18.86 20.24   ~ 195 2
56 QSO B1034-293 Bla 10 37 16.07974265 -29 34 02.8134977   16.46 16.46 17.54   ~ 358 1
57 ICRF J104309.0+240835 BLL 10 43 09.03578135 +24 08 35.4094642   17.98 17.32 16.40   ~ 171 1
58 6C 104451+715930 Bla 10 48 27.61992778 +71 43 35.9384142     19.0 17.49   ~ 270 1
59 ICRF J110607.2+281247 Bla 11 06 07.26174303 +28 12 47.0650016   19.20 18.75 20.02   ~ 93 0
60 2MASS J11232537-2528570 BLL 11 23 25.3733413608 -25 28 57.062697888   18.24   16.70   ~ 36 0
61 QSO B1124-186 Bla 11 27 04.39245388 -18 57 17.4418445   19.17 18.65 19.23   ~ 254 1
62 ICRF J112758.8+362028 Bla 11 27 58.87083269 +36 20 28.3514025   20.86 20.52 20.05   ~ 93 1
63 6C 114419+401458 Bla 11 46 58.29791724 +39 58 34.3043988   18.80 18.45 18.58   ~ 261 1
64 LB 2136 Bla 11 53 24.46663994 +49 31 08.8301372   17.94 17.66     ~ 529 1
65 6C 115118+405352 Bla 11 53 54.65896512 +40 36 52.6193857   19.68 19.36 20.2   ~ 101 1
66 Ton 599 Bla 11 59 31.83391383 +29 14 43.8268224   14.80 14.41 17.652 13.39 ~ 989 1
67 7C 122223.5+213929 Bla 12 24 54.4583146056 +21 22 46.385507388   17.56 17.50 18.2   ~ 770 2
68 QSO J1246-2547 Bla 12 46 46.80203943 -25 47 49.2889822   17.65 17.41 16.96 15.5 ~ 314 1
69 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
70 US 371 BLL 13 10 28.66385420 +32 20 43.7828340   15.61 15.24 17.91   ~ 917 1
71 QSO B1313-333 Bla 13 16 07.98594757 -33 38 59.1726741   18.04 20.0 17.23   ~ 267 1
72 NVSS J132210+084231 BLL 13 22 10.16928 +08 42 33.0660           ~ 40 1
73 7C 134328.69+450758.00 Bla 13 45 33.17247907 +44 52 59.5725560       19.6   ~ 138 1
74 PKS J1349-1132 Bla 13 49 31.4432339664 -11 32 53.829393360       16.94   ~ 77 1
75 4FGL J1401.2-0915 AG? 14 01 13.5 -09 15 28           ~ 11 0
76 PSO J214.8439-08.6422 Bla 14 19 22.5559897046 -08 38 32.139347932           ~ 50 1
77 6C 142016+323628 Bla 14 22 30.3788624376 +32 23 10.440862980   19.33 19.16 19.11   ~ 196 1
78 QSO B1424-41 Bla 14 27 56.29756617 -42 06 19.4376238   18.48 17.7 16.30   ~ 547 1
79 7C 1441+2514 Bla 14 43 56.89220390 +25 01 44.4907165   19.5   19.7   ~ 179 1
80 SDSS J145922.15+152654.7 QSO 14 59 22.1556 +15 26 54.774           ~ 32 1
81 QSO B1502+1041 Bla 15 04 24.97978391 +10 29 39.1985309   18.97 18.56 18.94   ~ 634 1
82 QSO B1509+022 Bla 15 12 15.7418011536 +02 03 16.978221972   18.94 18.31 16.6   ~ 149 1
83 QSO J1512-0906 Bla 15 12 50.53293048 -09 05 59.8297908   16.74 16.54     ~ 1409 1
84 7C 1520+3154 Bla 15 22 09.99173254 +31 44 14.3819383   20.45 19.89 19.87   ~ 230 1
85 QSO B1546+0246 Bla 15 49 29.43684740 +02 37 01.1632556   17.57 17.42 15.53   ~ 395 1
86 RX J155330.0-242223 QSO 15 53 31.62781399 -24 22 06.0360491           ~ 70 1
87 QSO B1622-253 Bla 16 25 46.89164287 -25 27 38.3268734   21.3 20.6 19.60   ~ 381 1
88 4C 38.41 Bla 16 35 15.49297809 +38 08 04.5005995   18.14 17.97 17.25   ~ 906 1
89 4C 47.44 Bla 16 37 45.13055568 +47 17 33.8311081   17.5   18.69   ~ 183 1
90 6C 163852+395305 Bla 16 40 29.63277140 +39 46 46.0284071   18.4 19.37 18.75   ~ 336 2
91 3C 345 Bla 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1808 3
92 ICRF J172244.5+101335 Bla 17 22 44.58278208 +10 13 35.7736314       19.4   ~ 79 1
93 ICRF J172807.0+121539 Bla 17 28 07.05121409 +12 15 39.4855448     20.0 19.47   ~ 94 1
94 QSO B1730-130 Bla 17 33 02.70578907 -13 04 49.5482119   18 19.50 18.78 17.39 ~ 1198 1
95 7C 173240.70+385949.00 BLL 17 34 20.57853650 +38 57 51.4430945   19.5 19 19.00   ~ 232 1
96 7C 173836.20+473929.00 BLL 17 39 57.12907095 +47 37 58.3614787   18.5 19.5 18.88   ~ 147 2
97 4C 51.37 Bla 17 40 36.97784792 +52 11 43.4073694   18.16 18.70 16.73   ~ 441 1
98 ICRF J180242.6-394007 Bla 18 02 42.68005300 -39 40 07.9081646       17.3   ~ 126 1
99 ICRF J183005.9+061915 Bla 18 30 05.93984953 +06 19 15.9522412       19.5   ~ 124 1
100 QSO B1830-211 Bla 18 33 39.9399138048 -21 03 39.368838780     18.70 21   ~ 724 1
101 6C 184914+670207 Bla 18 49 16.07228484 +67 05 41.6802599     16.90 17.45   ~ 305 2
102 QSO B1851+488 Bla 18 52 28.54781487 +48 55 47.4814782   19.0   18.77   ~ 121 1
103 QSO B1921-293 BLL 19 24 51.05595254 -29 14 30.1210248   18.71 18.21 15.07   ~ 918 1
104 QSO B1958-179 Bla 20 00 57.09043927 -17 48 57.6726139   18.02 18.60 15.33   ~ 288 1
105 PMN J2023-1140 Bla 20 23 36.69747600 -11 39 58.1936040           ~ 35 1
106 4FGL J2025.2+0317 AG? 20 25 14.0 +03 17 21           ~ 14 0
107 QSO B2022-077 BLL 20 25 40.6602562440 -07 35 52.688047128   18.5       ~ 234 3
108 ICRF J212100.6+190128 Bla 21 21 00.60664506 +19 01 28.2791111       20.3   ~ 89 1
109 QSO B2141+1730 Bla 21 43 35.54456275 +17 43 48.7875890   15.91 15.73 15.17   ~ 418 1
110 QSO J2147-7536 Bla 21 47 12.73063669 -75 36 13.2249063   17.79 17.30     ~ 167 1
111 4FGL J2156.3-0036 AG? 21 56 19.1 -00 36 14           ~ 17 0
112 QSO B2155-152 Bla 21 58 06.28188411 -15 01 09.3284729   18.63 18.30 17.79   ~ 355 1
113 QSO B2201+1711 BLL 22 03 26.89368237 +17 25 48.2477620     19.50 14.76   ~ 221 1
114 3C 446 BLL 22 25 47.25929101 -04 57 01.3907626   18.83 18.39 16.3   ~ 863 1
115 4C 11.69 Bla 22 32 36.40890093 +11 43 50.9040592   17.75 17.33     ~ 1205 2
116 ICRF J224412.7+405713 BLL 22 44 12.7311667056 +40 57 13.619816316       19.7   ~ 110 1
117 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 3004 2
118 ICRF J232154.9+320407 Bla 23 21 54.95598750 +32 04 07.6225103     18 20   ~ 115 1
119 4C 27.50 Bla 23 21 59.86222252 +27 32 46.4436999   19 19.0 18.8   ~ 160 1
120 QSO B2320-035 Bla 23 23 31.95375055 -03 17 05.0238540   18.6   18.16   ~ 229 2
121 QSO B2326-502 Bla 23 29 20.8816086312 -49 55 40.657964772   19.0 19.0 20.86   ~ 114 1
122 QSO J2345-1555 BLL 23 45 12.4622049264 -15 55 07.836801888   19.21   18.48   ~ 202 1
123 QSO B2345-167 Bla 23 48 02.60851466 -16 31 12.0222546   18.00 18.41 16.86   ~ 432 1

To bookmark this query, right click on this link: simbad:objects in 2022MNRAS.515.4505M and select 'bookmark this link' or equivalent in the popup menu