2004A&A...419...25F


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.07CET04:56:31

2004A&A...419...25F - Astronomy and Astrophysics, volume 419, 25-34 (2004/5-3)

The continuum spectral features of blazars in the optical region.

FIORUCCI M., CIPRINI S. and TOSTI G.

Abstract (from CDS):

Many quasi-simultaneous optical observations of 37 blazars were obtained at the Perugia University Observatory over the last ten years. In this paper we analyze the dereddened spectral flux distribution in the optical frequency range, and we compare our results with the overall spectral energy distribution (SED). The implications for existing models of the objects are briefly discussed. In particular, we show how the LBLs have a spectral slope α≃1.5, as expected from Synchrotron Self-Compton models, while the optical emission of HBLs and FSRQs is probably contaminated by other components. Moreover, we show evidence of how the spectral index vs. flux plot exhibits a characteristic loop-like pattern that is probably due to changes in the injection of accelerated particles.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: BL Lacertae objects: general - galaxies: quasars: general

Simbad objects: 38

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Number of rows : 38

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 QSO B0109+224 BLL 01 12 05.8246825085 +22 44 38.786096536   16.00 15.66 15.47   ~ 305 2
2 3C 66A BLL 02 22 39.6111630878 +43 02 07.797284539   15.71 15.21 14.5   ~ 807 1
3 QSO B0235+1624 BLL 02 38 38.93010 +16 36 59.2746   16.46 15.50 15.92   ~ 1412 2
4 4C 47.08 BLL 03 03 35.24222254 +47 16 16.2754406   17.54 16.95 16.2   ~ 247 1
5 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3621 3
6 QSO B0323+022 BLL 03 26 13.9474696478 +02 25 14.675022985   17.05 16.55 15.3   ~ 225 1
7 QSO B0414+009 BLL 04 16 52.4945787354 +01 05 23.896410061   16.86 16.38 16   ~ 249 0
8 QSO B0422+004 BLL 04 24 46.8423020674 +00 36 06.327828096 16.15 15.94 16.98     ~ 332 1
9 8C 0716+714 BLL 07 21 53.4484901266 +71 20 36.362058601   15.5 14.17 14.27   ~ 1155 1
10 QSO J0738+1742 BLL 07 38 07.39374766 +17 42 18.9982302   16.76 16.22 15.78   ~ 905 1
11 QSO B0754+10 BLL 07 57 06.64294682 +09 56 34.8523471   15.43 15.00 15.99   ~ 411 1
12 7C 080602.89+522749.00 BLL 08 09 49.1866520010 +52 18 58.249265842   16.11 15.59 14.6   ~ 235 2
13 QSO B0829+047 BLL 08 31 48.8771360822 +04 29 39.086736269   17.10 16.4 14.55   ~ 428 2
14 QSO J0854+2006 BLL 08 54 48.8749311881 +20 06 30.642936668   15.91 15.43 15.56   ~ 2060 1
15 Ton 397 BLL 09 15 52.4018373869 +29 33 24.041406916   16.79 16.39 16.085   ~ 198 1
16 6C 095456+654857 BLL 09 58 47.2452838930 +65 33 54.821524491     17.0 15.75   ~ 629 1
17 Mrk 421 BLL 11 04 27.3139210166 +38 12 31.798324828   13.50 12.90 8.31   ~ 2428 1
18 7C 1147+2434 BLL 11 50 19.2119754161 +24 17 53.834754764   16.26 15.74 15.80   ~ 253 1
19 Ton 605 HB* 12 16 53.6747853642 +30 04 08.693588731   16.110 15.98     B 221 0
20 6C 121520+302351 BLL 12 17 52.0819140772 +30 07 00.636792927   16.07 15.62 13.47   ~ 416 1
21 7C 1219+2830 BLL 12 21 31.6902446544 +28 13 58.500383827   16.81 16.11 14.24   ~ 793 1
22 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5406 1
23 3C 279 Bla 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2752 2
24 7C 1415+2556 BLL 14 17 56.6705499736 +25 43 26.244074817   18.00 17.2 14.6   ~ 155 0
25 6C 141804+543700 BLL 14 19 46.5976435439 +54 23 14.787308481   16.17 15.65 14.16   ~ 547 1
26 7C 1424+2401 BLL 14 27 00.3918388878 +23 48 00.035406946 14.52 14.34 14.95 14.5   ~ 301 1
27 QSO B1458+22 BLL 15 01 01.8350075608 +22 38 06.372083835   16.29 15.79     ~ 111 0
28 6C 161147+342017 QSO 16 13 41.0645258703 +34 12 47.911898732   17.98 17.46 17.07   ~ 585 1
29 3C 345 QSO 16 42 58.8100340220 +39 48 36.999540578   16.81 16.59 16.84   ~ 1574 2
30 4C 39.49 BLL 16 53 52.21668494 +39 45 36.6089458 14.09 14.15 13.29 8.26   ~ 1954 2
31 QSO B1722+119 BLL 17 25 04.34087 +11 52 15.4688   16.29 15.77 14.45   ~ 172 1
32 6C 172704+501607 BLL 17 28 18.6239898055 +50 13 10.472390025   16.55 15.97 12.95   ~ 331 1
33 3C 371 BLL 18 06 50.6803567107 +69 49 28.108152993   14.77 14.22 11.39   ~ 806 2
34 QSO B2032+107 QSO 20 35 22.3341660153 +10 56 06.789797044   17.96 16.37 17.4   ~ 167 1
35 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 2037 1
36 3C 454.3 Bla 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2557 2
37 QSO B2254+0727 BLL 22 57 17.30312249 +07 43 12.3024770   17.07 16.36     ~ 289 1
38 QSO B2344+514 BLL 23 47 04.8376303689 +51 42 17.875387216     15.50 10.7   ~ 399 0

    Equat.    Gal    SGal    Ecl

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2021.03.07-04:56:31

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