2012A&A...538A..26R

Query : 2012A&A...538A..26R

2012A&A...538A..26R - Astronomy and Astrophysics, volume 538A26-26 (2012/2-1)

BL Lacertae objects beyond redshift 1.3 - UV-to-NIR photometry and photometric redshift for Fermi/LAT blazars.

RAU A., SCHADY P., GREINER J., SALVATO M., AJELLO M., BOTTACINI E., GEHRELS N., AFONSO P.M.J., ELLIOTT J., FILGAS R., KANN D.A., KLOSE S., KRUEHLER T., NARDINI M., NICUESA GUELBENZU A., OLIVARES E.F., ROSSI A., SUDILOVSKY V., UPDIKE A.C. and HARTMANN D.H.

Abstract (from CDS):

Observations of the γ-ray sky with Fermi led to significant advances towards understanding blazars, the most extreme class of active galactic nuclei. A large fraction of the population detected by Fermi is formed by BL Lacertae (BL Lac) objects, whose sample has always suffered from a severe redshift incompleteness due to the quasi-featureless optical spectra. Our goal is to provide a significant increase of the number of confirmed high-redshift BL Lac objects contained in the 2 LAC Fermi/LAT cataloge. For 103 Fermi/LAT blazars, photometric redshifts using spectral energy distribution fitting have been obtained. The photometry includes 13 broad-band filters from the far ultraviolet to the near-IR observed with Swift/UVOT and the multi-channel imager GROND at the MPG/ESO 2.2 m telescope. Data have been taken quasi-simultaneously and the remaining source-intrinsic variability has been corrected for. We release the UV-to-near-IR 13-band photometry for all 103 sources and provide redshift constraints for 75 sources without previously known redshift. Out of those, eight have reliable photometric redshifts at z>1.3, while for the other 67 sources we provide upper limits. Six of the former eight are BL Lac objects, which quadruples the sample of confirmed high-redshift BL Lac. This includes three sources with redshifts higher than the previous record for BL Lac, including CRATES J0402-2615, with the best-fit solution at z∼1.9.

Abstract Copyright: ∼

Journal keyword(s): galaxies: distances and redshifts - techniques: photometric - BL Lacertae objects: general

VizieR on-line data: <Available at CDS (J/A+A/538/A26): table1.dat table2.dat table3.dat table4.dat>

Simbad objects: 107

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Number of rows : 107
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 ATO J000.3251-07.7741 BLL 00 01 18.0249466512 -07 46 26.920186536 18.18 17.88 17.90 16.3   ~ 61 1
2 QSO J0009+0628 BLL 00 09 03.9322109352 +06 28 21.242543304 19.24 18.51 18.14 19.1   ~ 85 1
3 2MASS J00213254-2550493 BLL 00 21 32.5495584984 -25 50 49.389619668 18.15 17.82 17.93 18.0   ~ 43 0
4 ATO J005.5386-18.8930 BLL 00 22 09.2686975344 -18 53 34.868121432 17.48 17.20 16.97     ~ 52 1
5 RX J0035.2+1515 BLL 00 35 14.7240495552 +15 15 04.152759516 17.48 17.20 16.97 16.7   ~ 75 0
6 LEDA 1413300 BLL 00 37 50.8803675096 +12 38 19.876764084 17.59 16.83 16.22 14.7   ~ 49 1
7 RX J0045.3+2127 BLL 00 45 19.2982391160 +21 27 40.001545080 17.37 17.33 17.01 17.3   ~ 85 1
8 QSO J0049+0237 BLL 00 49 43.23593957 +02 37 03.7785936 19.56 19.23 19.14 19.07   ~ 104 1
9 QSO B0048-09 BLL 00 50 41.3172421464 -09 29 05.210474100 16.74 16.39 16.22 16.14   ~ 480 2
10 PMN J0051-6242 BLL 00 51 16.6464761530 -62 42 04.408098612 17.50 17.42 17.38   16.493 ~ 59 1
11 HE 0052-2511 BLL 00 54 46.7593476432 -24 55 29.219073024 17.06 16.85 16.78     ~ 57 0
12 ICRF J005802.2-323420 BLL 00 58 02.2303103256 -32 34 20.750614536 18.26 17.61 17.60 20.00   ~ 69 1
13 ICRF J011452.7+132537 BLL 01 14 52.7765859624 +13 25 37.531933788 17.20 16.98 16.86 17.2   ~ 67 1
14 SDSS J011540.51+035643.3 BLL 01 15 40.5116006640 +03 56 43.302378840 18.04 18.01 17.82 19.2   ~ 63 1
15 RX J0115.7+2520 BLL 01 15 46.1420552904 +25 19 53.344003368 18.08 17.88 18.52     ~ 85 1
16 PSO J021.2103-06.4169 BLL 01 24 50.4851504351 -06 25 00.943106646       18.4   ~ 46 1
17 PMN J0154+0823 BLL 01 54 02.7703237368 +08 23 51.067067748 16.81 16.63 16.46     ~ 79 1
18 PMN J0156-5302 BLL 01 56 58.0038753524 -53 01 59.958409848 18.53 18.36 18.46     ~ 60 1
19 2FGL J0158.3-3931 BLL 01 58 38.1066681696 -39 32 03.798534624 17.86 17.62 17.58 16.17   ~ 55 1
20 2FGL J0159.6-2741 BLL 01 59 43.3560979872 -27 40 38.261343756 17.82 17.75 17.43 15.9   ~ 49 1
21 PMN J0209-5229 BLL 02 09 21.6157612080 -52 29 22.788843756 17.30 17.00 16.69 14.5   ~ 62 1
22 ICRF J021113.1+105134 BLL 02 11 13.1774921592 +10 51 34.798753116 13.96 13.63 13.40 15.42   ~ 161 1
23 PMN J0216-6636 BLL 02 16 50.8694017295 -66 36 42.600089395 17.96 17.44 17.57     ~ 50 1
24 1RXS J023733.9-360330 BLL 02 37 34.0464247200 -36 03 28.455320844 17.99 17.65 17.63 16.3   ~ 67 1
25 RBS 337 BLL 02 38 32.4803496720 -31 16 58.063079280 16.86 16.81 16.46 16.00   ~ 82 1
26 NVSS J025017+170810 Rad 02 50 17.4080717633 +17 08 08.322820857           ~ 4 1
27 9Y-MST J0314-5102 BLL 03 14 25.70348 -51 04 31.5614 18.57 18.33 18.00 18.4   ~ 47 1
28 1RXS J032342.6-011131 BLL 03 23 43.6189299792 -01 11 46.206256992 17.67 17.48 16.96 17.4   ~ 27 1
29 1FGL J0323.7-0106 mul 03 23 45.3 -01 11 25           ~ 57 0
30 1RXS J032354.4-010821 BLL 03 23 56.6340475446 -01 08 29.672594965           ~ 34 1
31 LEDA 398865 Bla 03 25 22.67270 -56 29 04.9753       17.9   ~ 58 0
32 PMN J0325-5635 BLL 03 25 23.5266207528 -56 35 44.648467836 17.55 16.56 15.89 13.2   ~ 36 0
33 QSO B0332-403 BLL 03 34 13.65448823 -40 08 25.3979928 18.54 18.35 17.87 17.5   ~ 349 1
34 ICRF J033415.4-372543 BLL 03 34 15.4249837080 -37 25 43.063647672 16.95 16.71 16.56     ~ 80 1
35 2FGL J0357.0-4950 BLL 03 57 00.1867173024 -49 55 48.618939000 18.29 18.00 17.56 16.8   ~ 54 1
36 2MASS J04020076-2615395 BLL 04 02 00.7850211204 -26 15 39.414974683 19.60 19.06 18.68 18.8   ~ 47 1
37 QSO B0422+004 BLL 04 24 46.8421990080 +00 36 06.329375028 16.15 15.94 16.98     ~ 378 1
38 ICRF J043016.0-250738 BLL 04 30 16.0360093728 -25 07 38.959958820 18.32 18.26 17.66 19.5   ~ 60 1
39 2FGL J0434.1-2014 BLL 04 34 07.9139033376 -20 15 17.144331444 18.95 18.45 18.17 19.6   ~ 54 1
40 PMN J0448-1632 BLL 04 48 37.6263575616 -16 32 43.246837104 17.77   17.59 16.6   ~ 61 1
41 PMN J0505+0416 BLL 05 05 34.7693853576 +04 15 54.577536876 18.07 17.80 17.56 16.8   ~ 83 1
42 RX J0506.9-5435 BLL 05 06 57.8154316665 -54 35 03.822937816 17.60 17.25 17.14   15.822 ~ 62 0
43 PMN J0509+0541 BLL 05 09 25.9644373872 +05 41 35.333820420 15.32 14.95 14.78 15.12   ~ 589 2
44 QSO B0516-621 BLL 05 16 44.92617055 -62 07 05.3894029 18.50 18.09 17.85 17.46   ~ 139 1
45 1RXS J053629.4-334302 BLL 05 36 29.0674147920 -33 43 02.465333796 17.11 16.97 16.93 16.8   ~ 58 1
46 2FGL J0537.7-5716 BLL 05 37 48.9538387032 -57 18 30.099289860 17.85 17.77 17.34     ~ 48 0
47 2MASS J05381040-3908424 BLL 05 38 10.3641407619 -39 08 42.458641108 19.24 19.22       ~ 43 1
48 QSO B0537-286 Bla 05 39 54.28147904 -28 39 55.9481236   19.70 20.0 18.789   ~ 314 1
49 PMN J0544-5532 BLL 05 43 57.2123766984 -55 32 07.327939200 17.34 17.18 17.09 16.5   ~ 84 1
50 2FGL J0558.7-7501 BLL 05 58 46.0386222288 -74 59 05.209726560 18.05 17.55 17.26     ~ 56 1
51 1RXS J060409.4-481726 BLL 06 04 08.6207497217 -48 17 25.157359371 17.96 17.91 17.79     ~ 51 1
52 PMN J0630-2406 BLL 06 30 59.5217586120 -24 06 46.204083144 16.48 16.22 16.04 16   ~ 97 1
53 2FGL J0647.8-6102 BLL 06 47 40.85242 -60 58 05.0538 20.06 19.55       ~ 44 1
54 RX J0650.7+2502 BLL 06 50 46.4900658984 +25 02 59.625654828 16.17 15.97 15.79 16.3   ~ 175 2
55 2MASS J07003124-6610452 BLL 07 00 31.2536435688 -66 10 45.229749384 16.38 15.99 15.89     ~ 86 3
56 3FHL J0705.9-4848 BLL 07 05 58.73246 -48 47 24.5207           ~ 37 1
57 NAME [MGL2009] BZB J0718-43.4 BLL 07 18 43.62768 -43 19 49.7256 17.51 17.27 17.07 16.5   ~ 44 1
58 2FGL J0811.1-7527 BLL 08 11 03.2072676624 -75 30 27.821206116 17.74 17.50 17.48 17.2   ~ 60 1
59 ATO J123.5487-10.2028 BLL 08 14 11.6936593656 -10 12 10.286072352 17.20 16.91 17.03 16.6   ~ 43 0
60 PMN J0816-1311 BLL 08 16 27.2037492048 -13 11 52.623678156 17.15 17.09 17.00 16.93   ~ 80 1
61 ICRF J081749.7-093330 BLL 08 17 49.7493705648 -09 33 30.523860972 18.38 17.96 17.61 17.51   ~ 82 1
62 SDSS J085639.74+205743.3 BLL 08 56 39.7406794656 +20 57 43.398504468 18.90 18.67 18.51 19.5   ~ 58 1
63 ICRF J085641.8-110514 BLL 08 56 41.80415844 -11 05 14.4303584 18.30 17.90 17.29 16.66   ~ 89 1
64 ATO J135.6121+20.8462 BLL 09 02 26.9116467072 +20 50 46.396146264 16.91 16.74 16.69 17.4   ~ 60 1
65 NVSS J090535+135803 BLL 09 05 34.9904763192 +13 58 06.327510888 17.12 16.83 16.82 16.3   ~ 67 1
66 NAME CRATES-VA J0906-0905 BLL 09 06 18.0549950471 -09 05 44.920448369 17.90 17.85 17.37     ~ 49 1
67 PMN J0953-0840 BLL 09 53 02.7095643576 -08 40 18.360856776 16.99 16.73 16.69 17.4   ~ 82 1
68 QSO J1008+0621 BLL 10 08 00.81616040 +06 21 21.2160257 17.61 17.17 17.85 16.73   ~ 123 1
69 RX J1022.7-0112 BLL 10 22 43.7262822072 -01 13 02.401659264 17.71 17.61 17.63 16.9   ~ 71 0
70 RX J1023.9-4336 BLL 10 23 56.1914519976 -43 36 01.532204208 16.57 16.36 16.27 16.7   ~ 51 0
71 PKS J1026-8543 BLL 10 26 34.3726353456 -85 43 14.295212292 17.16 16.91 16.65 16.9   ~ 53 1
72 ICRF J103742.4-282304 BLL 10 37 42.4574677368 -28 23 04.110480384 18.89 18.77 19.05 18.6   ~ 76 1
73 NVSS J104900+233821 BLL 10 49 00.2499680348 +23 38 20.252826197 19.39 19.33 18.36 17.3   ~ 13 0
74 87GB 105148.6+222705 BLL 10 54 30.6250887672 +22 10 54.796074852 17.67 17.39 17.20 17.1   ~ 68 1
75 2MASS J11073589+0222250 BLL 11 07 35.9156720520 +02 22 24.595003416 18.41 18.51 18.26 18.6   ~ 49 0
76 ICRF J112402.7+233645 BLL 11 24 02.70590242 +23 36 45.8701768 19.50 19.32 19.26 19.75   ~ 104 1
77 ICRF J113245.6+003427 BLL 11 32 45.6184743144 +00 34 27.830851248 18.98 18.54 18.08 17.5   ~ 131 1
78 QSO B1216-010 BLL 12 18 34.9299611304 -01 19 54.342898428 18.43 18.30 18.01 18.2   ~ 119 1
79 NVSS J123341-014426 BLL 12 33 41.3342161329 -01 44 23.711099800 19.16 18.87 18.46 18.22   ~ 51 0
80 RX J1251.2+1039 BLL 12 51 17.8838033784 +10 39 07.307958780 18.32 18.14 17.73     ~ 53 1
81 1RXS J130421.2-435308 BLL 13 04 21.0058097184 -43 53 10.199729472 16.09 15.84 15.71     ~ 72 1
82 PMN J1307-4259 BLL 13 07 37.9837746648 -42 59 38.986887192 16.39 16.10 15.92 15.80 14.59 ~ 68 1
83 QSO B1307+121 BLL 13 09 33.93245274 +11 54 24.5530422 18.95 18.72 18.28 18.16   ~ 158 1
84 QSO B1309-216 BLL 13 12 31.5548352888 -21 56 23.389976472 17.56 17.27 17.18     ~ 95 1
85 7C 1312+2404 BLL 13 14 43.8062104200 +23 48 26.782554060 17.15 16.83 16.57 15.4   ~ 99 2
86 RX J1351.3+1114 BLL 13 51 20.8456353168 +11 14 52.980699588 17.97 17.82 17.87     ~ 72 1
87 2MASS J13532282+1435398 BLL 13 53 22.8399256776 +14 35 39.262556760 17.83 17.51 17.38     ~ 56 1
88 2FGL J1359.9-3746 BLL 13 59 49.7177736648 -37 46 00.847671708 17.83 17.57 17.19 15   ~ 51 1
89 2FGL J1407.5-4257 BLL 14 07 39.72090 -43 02 31.9386           ~ 50 1
90 NVSS J141826-023336 BLL 14 18 26.3272568400 -02 33 34.142899320 16.00 15.85 15.63 16.62   ~ 63 0
91 PG 1424+240 BLL 14 27 00.3917926224 +23 48 00.037510776 14.52 14.34 14.95 14.5   ~ 420 1
92 2MASS J14405293+0610162 BLL 14 40 52.9387587024 +06 10 16.192432236 17.77 17.41 17.34     ~ 76 1
93 QSO B1514+197 BLL 15 16 56.79616460 +19 32 12.9919519 18.59 18.19 18.7 17.51   ~ 187 1
94 PG 1553+113 BLL 15 55 43.0440048528 +11 11 24.365649948 14.91 14.72 14.57 13.99   ~ 672 1
95 1RXS J195945.8-472531 BLL 19 59 45.6659618232 -47 25 19.352198028 17.13 16.94 16.92     ~ 48 0
96 QSO B2012-017 BLL 20 15 15.1579835136 -01 37 32.554493544 18.08 17.86 17.61 16.5   ~ 105 1
97 ICRF J203900.7-104641 BLL 20 39 00.7103307384 -10 46 41.863534320 17.24 16.95 16.69 19.0   ~ 72 1
98 PMN J2103-6232 BLL 21 03 38.3969446440 -62 32 25.919721585 16.91 16.65 16.56     ~ 50 1
99 9Y-MST J2109-6638 BLL 21 08 51.8208584088 -66 37 22.748840004 18.57 18.27 18.32     ~ 52 1
100 2MASX J21494185+0322516 BLL 21 49 41.8698135840 +03 22 51.435422796 18.01 17.72 17.31     ~ 56 1
101 PMN J2221-5224 BLL 22 21 29.3103906816 -52 25 27.833229372 16.81 16.57 16.9 16.7   ~ 58 0
102 QSO B2233-148 BLL 22 36 34.08715104 -14 33 22.1896043 19.53 19.13 18.66 18.05   ~ 172 1
103 9Y-MST J2255+2411 BLL 22 55 15.376 +24 10 11.31 17.65 17.55 17.23 18.1   ~ 67 1
104 RX J2313.9+1444 BLL 23 13 57.3374119560 +14 44 23.232581304 18.55 18.21 17.14     ~ 66 1
105 ICRF J231544.3-501839 BLL 23 15 44.33035057 -50 18 39.7046902 19.21 18.79 18.95 18.53   ~ 94 1
106 RX J2324.7-4040 BLL 23 24 44.6723616768 -40 40 49.444171248 15.88 15.72 15.54 16.84   ~ 88 1
107 87GB 234934.7+173227 BLL 23 52 05.8374165936 +17 49 13.745647704 19.37 18.83 18.80 17.8   ~ 45 1

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