2011ApJ...739...73M

Query : 2011ApJ...739...73M

2011ApJ...739...73M - Astrophys. J., 739, 73 (2011/October-1)

X-ray spectral curvature of high-frequency-peaked BL Lac objects: a predictor for the TeV flux.

MASSARO F., PAGGI A., ELVIS M. and CAVALIERE A.

Abstract (from CDS):

Most of the extragalactic sources detected at TeV energies are BL Lac objects. They belong to the subclass of high-frequency-peaked BL Lac objects (HBLs) exhibiting spectral energy distributions with a lower energy peak in the X-ray band; this is widely interpreted as synchrotron emission from relativistic electrons. The X-ray spectra are generally curved and well described in terms of a log-parabolic shape. In a previous investigation of TeV HBLs (TBLs) we found two correlations between their spectral parameters. (1) The synchrotron peak luminosity Lp increases with its peak energy Epand (2) the curvature parameter b decreases as Epincreases. The first is consistent with the synchrotron scenario, while the second is expected from statistical/stochastic acceleration mechanisms for the emitting electrons. Here, we present an extensive X-ray analysis of a sample of HBLs observed with XMM-Newton and Swift but undetected at TeV energies (UBLs), to compare their spectral behavior with that of TBLs. Investigating the distributions of their spectral parameters and comparing the TBL X-ray spectra with that of UBLs, we develop a criterion to select the best HBL candidates for future TeV observations.

Abstract Copyright: ∼

Journal keyword(s): acceleration of particles - BL Lacertae objects: general - galaxies: active - radiation mechanisms: non-thermal - X-rays: galaxies

Simbad objects: 54

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Number of rows : 54
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 2MASX J00135605-1854066 BLL 00 13 56.0426451480 -18 54 06.702770232   17.01   15.82   ~ 86 1
2 RX J0123.1+3420 BLL 01 23 08.6375580816 +34 20 48.664188060       16.8   ~ 132 1
3 RX J0201.1+0034 BLL 02 01 06.1794930072 +00 34 00.135789564   18.99 18.42 18   ~ 113 0
4 1RXS J020837.5+352314 BLL 02 08 38.1634090056 +35 23 12.806970864       18.8   ~ 110 0
5 RX J0214.2+5144 BLL 02 14 17.9358553848 +51 44 51.945795816       16.5   ~ 133 1
6 RX J0227.2+0201 BLL 02 27 16.5921613152 +02 02 00.007676880       18.9   ~ 65 1
7 1RXS J032540.8-164607 BLL 03 25 41.0966464392 -16 46 16.854374712           ~ 67 1
8 PMN J0326+0225 BLL 03 26 13.9481827296 +02 25 14.675937708   17.05 16.55 15.3   ~ 255 1
9 1RXS J041112.1-394131 BLL 04 11 12.3746456904 -39 41 43.635220980       19.5   ~ 17 0
10 1RXS J044127.8+150455 BLL 04 41 27.4667781960 +15 04 55.600800780       18.4   ~ 29 0
11 2MASS J04423023-0018294 BLL 04 42 30.2153409408 -00 18 29.856094416       18.7   ~ 20 0
12 1RXS J062150.0-341140 BLL 06 21 49.7056934664 -34 11 49.346560176       20.2   ~ 26 0
13 QSO B0737+744 BLL 07 44 05.3750968872 +74 33 58.256429832     16.89 16.6   ~ 144 0
14 1RXS J075124.3+173044 BLL 07 51 25.1041069464 +17 30 51.212558772       18.2   ~ 32 0
15 LEDA 1863770 BLL 07 53 24.6115884120 +29 21 31.977623196       15.7   ~ 19 0
16 RX J0847.2+1133 BLL 08 47 12.9303893448 +11 33 50.153057640       16.6   ~ 121 1
17 RX J0916.8+5238 BLL 09 16 51.9350409624 +52 38 28.331223072   19.02 18.10 15   ~ 82 1
18 RX J0930.6+4950 BLL 09 30 37.5737660328 +49 50 25.549611036   18.81 18.25 17.3   ~ 128 0
19 RX J0952.4+7502 BLL 09 52 24.2117512536 +75 02 13.168604688     19.90 15.6   ~ 37 0
20 6dFGS gJ101016.0-311909 BLL 10 10 15.9790879224 -31 19 08.411407176   17.61   16.09   ~ 97 1
21 RX J1022.2+5124 BLL 10 22 12.6093907056 +51 24 00.300796992           ~ 59 0
22 2E 1050.7+4946 ClG 10 53 44.1 +49 29 56           ~ 58 1
23 7C 105047.29+494553.00 BLL 10 53 44.1256067376 +49 29 55.999047156   18.70 17.76 13.8   ~ 155 2
24 RX J1056.1+0252 BLL 10 56 06.6107656968 +02 52 13.568852424   19.86 18.93 17.8   ~ 36 0
25 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
26 RX J1111.5+3452 BLL 11 11 30.8991225240 +34 52 03.412837704   19.96 19.52 19.3   ~ 25 0
27 RX J1117.1+2014 BLL 11 17 06.2512673640 +20 14 07.380923028           ~ 159 1
28 HS 1133+6753 BLL 11 36 30.0868711488 +67 37 04.345988232   18.19 17.45 15.3   ~ 161 1
29 1RXS J114535.8-033948 BLL 11 45 35.1087635448 -03 40 01.604912952   19.76 18.56     ~ 49 1
30 2MASS J11540456-0010096 BLL 11 54 04.5561127560 -00 10 09.869511036   19.08 18.62     ~ 87 0
31 QSO B1229+6430 BLL 12 31 31.3949261640 +64 14 18.280701600   18.36 17.62 14.3   ~ 160 2
32 RX J1237.6+6258 BLL 12 37 39.0753390528 +62 58 42.801146328   18.89 18.25 17   ~ 116 0
33 PMN J1253-3932 BLL 12 53 41.2576033944 -39 31 59.450276892   18.73   17.18   ~ 35 1
34 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
35 RX J1257.5+2412 BLL 12 57 31.9330943592 +24 12 40.164677136       15.7   ~ 91 0
36 7C 1338+4015 BLL 13 41 05.1067840920 +39 59 45.418368768   18.93 18.24 14.9   ~ 91 2
37 RX J1417.9+2543 BLL 14 17 56.6706279264 +25 43 26.244368868   18.00 17.2 14.6   ~ 190 1
38 RX J1428.5+4240 BLL 14 28 32.6090008440 +42 40 21.048123396   16.95 16.45 14.4   ~ 549 1
39 PG 1437+398 BLL 14 39 17.4789214824 +39 32 42.807064020   17.36 17.10 16.5   ~ 125 2
40 RX J1442.8+1200 BLL 14 42 48.2771008152 +12 00 40.348597716   18.34 17.63 15.2   ~ 189 1
41 RX J1510.6+3335 BLL 15 10 41.1182766024 +33 35 04.705463004   18.6 17.70 15.1   ~ 39 0
42 2MASS J15344720+3715545 BLL 15 34 47.2078521912 +37 15 54.618295464   18.26 17.57     ~ 89 1
43 RX J1605.3+5421 BLL 16 05 19.0570123248 +54 20 59.952793272 19.39 19.80 19.08 18.9   ~ 50 1
44 RX J1626.4+3513 BLL 16 26 25.8603470616 +35 13 41.454253488   19.05 18.54 18.1   ~ 66 1
45 Z 225-7 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2304 2
46 ZW I 187 BLL 17 28 18.6242294352 +50 13 10.469553996   16.55 15.97 12.95   ~ 396 1
47 1RXS J174357.3+193505 BLL 17 43 57.8330083440 +19 35 09.018846384     16.80 12.7   ~ 190 1
48 1RXS J213135.5-091525 BLL 21 31 35.4233915640 -09 15 23.693668272     18.00 17.5   ~ 73 1
49 PKS J2158-3013 BLL 21 58 52.0652249880 -30 13 32.118447792   13.36 13.09 12.62   ~ 1829 1
50 1RXS J220156.0-170656 BLL 22 01 55.8314504520 -17 07 00.517947276   18.42   16.89   ~ 25 0
51 RX J2250.0+3824 BLL 22 50 05.7481607616 +38 24 37.193100984       14.8   ~ 147 2
52 1RXS J230846.7-221955 BLL 23 08 46.8647061744 -22 19 48.991643580   18.60 17.6 16.51   ~ 32 0
53 1RXS J232243.7+343616 BLL 23 22 44.0142017808 +34 36 13.873220208       13.2   ~ 87 1
54 1RXS J234332.5+343957 BLL 23 43 33.5859477792 +34 39 50.949452160           ~ 56 1

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