2007A&A...470..787P


Query : 2007A&A...470..787P

2007A&A...470..787P - Astronomy and Astrophysics, volume 470, 787-809 (2007/8-1)

The sedentary survey of extreme high-energy peaked BL Lacs. III. Results from optical spectroscopy.

PIRANOMONTE S., PERRI M., GIOMMI P., LANDT H. and PADOVANI P.

Abstract (from CDS):

The multi-frequency sedentary survey is a flux-limited, statistically well-defined sample of highly X-ray dominated (i.e., with a very high X-ray to radio flux ratio) BL Lacertae objects, which includes 150 sources. In this paper, the third of the series, we report the results of a dedicated optical spectroscopy campaign that, together with results from other independent optical follow-up programs, led to the spectroscopic identification of all sources in the sample. We carried out a systematic spectroscopic campaign for the observation of all unidentified objects of the sample using the ESO 3.6m, the KPNO 4m, and the TNG optical telescopes. We present new identifications and optical spectra for 76 sources, 50 of which are new BL Lac objects, 18 are sources previously referred as BL Lacs but for which no redshift information was available, and 8 are broad emission-line AGNs. We find that the multi-frequency selection technique used to build the survey is highly efficient (∼90%) in selecting BL Lacs objects. We present positional and spectroscopic information for all confirmed BL Lac objects. Our data allowed us to determine 36 redshifts out of the 50 new BL Lacs and 5 new redshifts for the previously known objects. The redshift distribution of the complete sample is presented and compared with that of other BL Lacs samples. For 26 sources without recognizable absorption features, we calculated lower limits to the redshift using a method based on simulated optical spectra with different ratios between jet and galaxy emission. For a subsample of 38 object with high-quality spectra, we find a correlation between the optical spectral slope, the 1.4 GHz radio luminosity, and the Ca H&K break value, indicating that for powerful/beamed sources the optical light is dominated by the non-thermal emission from the jet.

Abstract Copyright:

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

VizieR on-line data: <Available at CDS (J/A+A/470/787): table3.dat table4.dat table6.dat>

CDS comments: Paragraph 3.1 standard stars BD 3326 and CD 3299 are not identified.

Simbad objects: 82

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Number of rows : 82
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 LBQS 0004+0224 QSO 00 07 27.0553721040 +02 41 13.081675740   17.71 18.00     ~ 32 0
2 SDSS J001527.94+353639.0 BLL 00 15 27.9464473488 +35 36 39.033974304       18.5   ~ 22 0
3 KUV 00311-1938 BLL 00 33 34.3800569400 -19 21 33.134193864   16.8 16.3 16.6   ~ 118 0
4 4FGL J0042.0+3640 BLL 00 42 08.1061514568 +36 41 12.908168124     17.50 17.5   ~ 36 0
5 2FHL J0114.9-3359 BLL 01 15 01.6479182544 -34 00 27.119000088       19.1   ~ 31 0
6 2MASS J01174702-2443338 BLL 01 17 47.0198249136 -24 43 33.942514764       17   ~ 22 0
7 SDSS J012657.23+330730.2 BLL 01 26 57.2379078072 +33 07 30.315326268     17.70 18.7   ~ 29 0
8 87GB 013336.4+385101 BLL 01 36 32.5983798936 +39 05 59.199517428     15.80 15.5   ~ 133 1
9 1BIGB J020412.9-333339 BLL 02 04 12.9304093536 -33 33 41.065719768       19   ~ 25 0
10 1RXS J023727.6-263027 BLL 02 37 28.0 -26 30 24           ~ 5 0
11 2MASS J03163377-2216130 BLL 03 16 33.7625348352 -22 16 12.901525500       17.3   ~ 14 0
12 2WHSP J032350.6+071736 BLL 03 23 50.7365106120 +07 17 36.803431716       19.1   ~ 12 0
13 3HSP J040324.6-242947 BLL 04 03 24.5795966424 -24 29 49.845157476       18.5   ~ 14 0
14 1BIGB J041112.2-394143 BLL 04 11 12.3746456904 -39 41 43.635220980       19.5   ~ 17 0
15 4FGL J0441.5+1505 BLL 04 41 27.4667781960 +15 04 55.600800780       18.4   ~ 28 0
16 2MASS J04423023-0018294 BLL 04 42 30.2153409408 -00 18 29.856094416       18.7   ~ 20 0
17 * pi.02 Ori * 04 50 36.7224881321 +08 54 00.652210041 4.39 4.36 4.35 4.29 4.29 A1Vn 186 0
18 4FGL J0503.5-1116 BLL 05 03 35.4199786056 -11 15 06.738530040       19.9   ~ 26 0
19 2WHSP J050939.7-251403 BLL 05 09 39.8556026280 -25 14 02.937073920       19   ~ 12 0
20 2MASS J06071437-2518593 BLL 06 07 14.3762931000 -25 18 59.352566472       17.7   ~ 26 0
21 1BIGB J062149.6-341148 BLL 06 21 49.7056934664 -34 11 49.346560176       20.2   ~ 26 0
22 HD 289002 * 06 45 13.3725491952 +02 08 14.685250596 10.06 10.62 10.44     B1 260 0
23 2MASS J07512509+1730509 BLL 07 51 25.1041069464 +17 30 51.212558772     18.2 18.2   ~ 29 0
24 LEDA 1863770 BLL 07 53 24.6115884120 +29 21 31.977623196       15.7   ~ 18 0
25 RX J0924.0+0533 BLL 09 24 01.0396071048 +05 33 45.408775212   18.96 18.65 18.2   ~ 40 1
26 2WHSP J094355.4-070950 BLL 09 43 55.5426826992 -07 09 50.352352488       19.2   ~ 14 0
27 LEDA 2765951 BLL 09 52 24.2117512536 +75 02 13.168604688     19.90 15.6   ~ 35 0
28 SDSS J095805.98-031740.2 BLL 09 58 05.9867161608 -03 17 40.210851552       18.9   ~ 32 0
29 6dFGS gJ101016.0-311909 BLL 10 10 15.9790879224 -31 19 08.411407176   17.61   16.09   ~ 90 1
30 2FGL J1023.1-0115 BLL 10 22 43.7262822072 -01 13 02.401659264 17.71 17.61 17.63 16.9   ~ 69 0
31 CD-34 6792 PM* 10 32 13.6185546336 -35 37 41.711776068   12.84 11.84     F:wl: 150 0
32 2MASS J10465149-2535461 BLL 10 46 51.4790946960 -25 35 45.973237416       18.3   ~ 41 0
33 3FGL J1119.7-3046 BLL 11 19 39.5943677976 -30 47 20.814964404       19.9   ~ 44 0
34 1BIGB J113444.6-172900 BLL 11 34 44.6993489376 -17 29 01.733715888       19.2   ~ 25 0
35 2MASS J11375560-1710421 BLL 11 37 55.6036520688 -17 10 42.048213312   19.0   18.8   ~ 33 0
36 2dFGRS TGN174Z251 BLL 11 45 35.1087635448 -03 40 01.604912952   19.76 18.56     ~ 39 1
37 2E 2667 AGN 12 20 38.0536889112 +69 05 05.188046856     17.69     ~ 15 0
38 2MASS J12341715-3856354 BLL 12 34 17.1395361912 -38 56 35.314877652       18.1   ~ 15 0
39 2WHSP J123511.0-140323 BLL 12 35 11.1923992224 -14 03 23.384079720       19.7   ~ 15 0
40 2MASS J12380253+3616403 BLL 12 38 02.5493873976 +36 16 39.945292968   20.14 19.57     ~ 25 0
41 3FGL J1241.6-1456 BLL 12 41 49.3631635080 -14 55 58.509612984     17.90 17.7   ~ 53 1
42 2WHSP J125015.4+315559 BLL 12 50 15.5272824960 +31 55 59.590861716   19.31 18.95 19.7   ~ 17 0
43 4FGL J1253.5-3934 BLL 12 53 41.2576033944 -39 31 59.450276892   18.73   17.18   ~ 33 1
44 LEDA 593403 BLL 13 03 50.4855754344 -39 50 33.112505652   17.96   16.50   ~ 12 1
45 2MASS J13395039+1559278 BLL 13 39 50.3865961800 +15 59 28.140293220   19.27 18.76     ~ 15 0
46 4FGL J1406.6-3934 BLL 14 06 30.0654065496 -39 35 09.209934852       19.7   ~ 26 0
47 2WHSP J140630.1+123620 BLL 14 06 30.1754672952 +12 36 20.423496456   20.07 19.61 19.8   ~ 14 0
48 SDSS J140659.19+164207.8 BLL 14 06 59.1885066864 +16 42 07.836157008   18.63 18.26 18.5   ~ 40 0
49 2MASS J14273948-2521025 BLL 14 27 39.48336 -25 21 02.5884       19   ~ 11 0
50 PG 1437+398 BLL 14 39 17.4789214824 +39 32 42.807064020   17.36 17.10 16.5   ~ 120 1
51 QSO B1442-032 BLL 14 45 06.2306796384 -03 26 12.733498104     17.2 17.9   ~ 50 1
52 QSO B1500-154 BLL 15 03 40.6675186296 -15 41 14.140402188     18.10 17.2   ~ 78 2
53 1BIGB J150637.0-054004 BLL 15 06 37.1078795520 -05 40 04.824178464     20.0 19.1   ~ 23 0
54 2XMM J151041.0+333505 BLL 15 10 41.1182766024 +33 35 04.705463004   18.6 17.70 15.1   ~ 38 0
55 2MASS J15161873-1523439 BLL 15 16 18.7342833936 -15 23 44.076511464     19.6 18.5   ~ 22 0
56 2MASS J15331125+1854290 BLL 15 33 11.2518579384 +18 54 29.054401704     17.10     ~ 58 0
57 2WHSP J161204.8-043815 BLL 16 12 04.8003349128 -04 38 15.742276548       19.7   ~ 12 0
58 2MASS J16163292+3756039 BLL 16 16 32.9089838280 +37 56 03.506888184   20.18 19.19 17.4   ~ 18 0
59 2MASS J16365841-1248366 BLL 16 36 58.4219345256 -12 48 36.678398688       17.4   ~ 14 0
60 2MASS J17081809-0349259 BLL 17 08 18.0919478448 -03 49 26.104191132           ~ 8 1
61 RX J1747.0+4938 BLL 17 47 02.4777986448 +49 38 01.630465440       19.3   ~ 26 0
62 2MASS J17561588+5522179 BLL 17 56 15.8816206632 +55 22 18.090129072   17.23 16.87 18   ~ 69 1
63 2MASS J18204248+3817100 BLL 18 20 42.4854369072 +38 17 09.994891524           ~ 7 0
64 CD-44 12736 PM* 18 36 25.9502475648 -44 18 36.907592904   10.83 10.22     G0 212 0
65 4FGL J1848.5+6537 BLL 18 48 22.4966893920 +65 36 57.823557264       18.6   ~ 29 0
66 2WHSP J203844.8-263632 BLL 20 38 44.9209922616 -26 36 32.645250828       19   ~ 15 0
67 2MASS J20473588-2908585 BLL 20 47 35.9183653296 -29 08 59.138456856       18.6   ~ 15 0
68 SDSS J204921.74-003926.6 BLL 20 49 21.7432552008 -00 39 26.657898264   20.33 19.44 18.3   ~ 23 0
69 SDSS J205242.61+081040.6 BLL 20 52 42.6125135040 +08 10 40.625854752       18.9   ~ 25 0
70 2MASS J21251638-2555262 QSO 21 25 16.3795213104 -25 55 26.319254736   19.80   18.64   ~ 7 0
71 2FGL J2131.6-0914 BLL 21 31 35.4233915640 -09 15 23.693668272     18.00 17.5   ~ 70 1
72 1RXS J213151.7-251602 BLL 21 31 51.5402789448 -25 15 58.637833884       18.5 17.43 ~ 38 0
73 2FGL J2139.1-2054 BLL 21 38 52.7560723272 -20 53 47.713911720     19.20 17.4   ~ 35 0
74 2MASS J22225388-1753214 BLL 22 22 53.8852677144 -17 53 21.173023968       18.5   ~ 15 0
75 2MASX J22294524-2755353 BLL 22 29 45.242 -27 55 35.35           ~ 6 0
76 4FGL J2249.4-1300 BLL 22 49 10.7315054688 -13 00 03.068180892     18.60 18.2   ~ 35 0
77 1BIGB J225147.5-320611 BLL 22 51 47.5594856352 -32 06 12.723850044     20.00 18.7   ~ 43 0
78 2FGL J2304.7+3703 BLL 23 04 36.7146091872 +37 05 07.422633924     17.50 18.1   ~ 63 0
79 4FGL J2307.4-1206 BLL 23 07 22.0954892304 -12 05 17.668798368       19.6   ~ 37 0
80 QSO B2307-375 BLL 23 10 28.0712705472 -37 19 09.331273992       19.5   ~ 12 0
81 1RXS J234332.5+343957 BLL 23 43 33.5859477792 +34 39 50.949452160           ~ 52 1
82 2MASS J23502334-2436031 BLL 23 50 23.3653382160 -24 36 03.241052676       16.2   ~ 14 0

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