2006AJ....132....1S

Query : 2006AJ....132....1S

2006AJ....132....1S - Astron. J., 132, 1-19 (2006/July-0)

ESO very large telescope optical spectroscopy of BL Lacertae objects. II. New redshifts, featureless objects, and classification assessments.

SBARUFATTI B., TREVES A., FALOMO R., HEIDT J., KOTILAINEN J. and SCARPA R.

Abstract (from CDS):

We report on ESO Very Large Telescope optical spectroscopy of 42 BL Lacertae objects of unknown redshift. Nuclear emission lines were observed in 12 objects, while for another six we detected absorption features due to the host galaxy. The new high signal-to-noise ratio spectra therefore allow us to measure the redshift of 18 sources. Five of the observed objects were reclassified as either stars or quasars, and one is of uncertain nature. For the remaining 18 the optical spectra appear without intrinsic features in spite of our ability to measure rather faint (equivalent width ∼0.1 Å) spectral lines. For the latter sources a lower limit to the redshift was set, exploiting the very fact that the absorption lines of the host galaxy are undetected in the observed spectra.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: BL Lacertae Objects: General - Galaxies: Distances and Redshifts

Simbad objects: 30

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Number of rows : 30
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 QSO J0049+0237 BLL 00 49 43.23593957 +02 37 03.7785936 19.56 19.23 19.14 19.07   ~ 104 1
2 QSO B0048-09 BLL 00 50 41.3172421464 -09 29 05.210474100 16.74 16.39 16.22 16.14   ~ 480 2
3 QSO B0420+022 BLL 04 22 52.21465085 +02 19 26.9307480     19.5 19.41   ~ 115 1
4 QSO B0422+004 BLL 04 24 46.8421990080 +00 36 06.329375028 16.15 15.94 16.98     ~ 378 1
5 ICRF J062923.7-195919 BLL 06 29 23.76186296 -19 59 19.7236825   20.43 18.6 20.68   ~ 141 1
6 QSO B0723-007 BLL 07 25 50.63991258 -00 54 56.5430511   17.39 16.57 15.82   ~ 284 1
7 QSO B0841+129 BLL 08 44 24.2445546984 +12 45 46.526286780   18.28 18.5     ~ 121 0
8 2MASS J12123293+1151116 * 12 12 32.9490913632 +11 51 11.659540608           B 6 2
9 PMN J1215+0732 BLL 12 15 10.9765816512 +07 32 04.676330688     16.0 14.8   ~ 114 1
10 NGC 4380 BLL 12 25 22.178 +10 01 00.14   13.4       ~ 275 0
11 1RXS J125135.2-295824 BLL 12 51 34.8343469232 -29 58 43.146193476       18.5   ~ 32 0
12 UM 566 WD* 13 19 55.0459374648 +01 52 59.430095292   18.26 18.2     DA3.0 24 0
13 QSO B1320+084 BLL 13 22 54.8871658080 +08 10 10.217278488   19.69 19.34 18.5   ~ 10 0
14 ICRF J135256.5-441240 BLL 13 52 56.53494646 -44 12 40.3876155   16.95 16.37     ~ 129 3
15 1RXS J144505.9-032613 BLL 14 45 06.2306796384 -03 26 12.733498104     17.2 17.9   ~ 50 1
16 1RXS J150343.0-154107 BLL 15 03 40.6675186296 -15 41 14.140402188     18.10 17.2   ~ 79 1
17 PG 1553+113 BLL 15 55 43.0440048528 +11 11 24.365649948 14.91 14.72 14.57 13.99   ~ 672 1
18 RX J1725.0+1152 BLL 17 25 04.3409350008 +11 52 15.471967296   16.29 15.77 14.45   ~ 221 1
19 QSO B2012-017 BLL 20 15 15.1579835136 -01 37 32.554493544 18.08 17.86 17.61 16.5   ~ 105 1
20 CPD-25 7328 * 21 31 56.1273116664 -25 16 42.049392780   11.109 10.620     ~ 6 0
21 4C -02.81 BLL 21 34 10.30958988 -01 53 17.2389056   18.6 19.00 18.87   ~ 431 1
22 LBQS 2132-4451 QSO 21 35 50.6437184472 -44 37 34.963015440   18.84 18.38     ~ 13 1
23 QSO B2136-428 BLL 21 39 24.1733820912 -42 35 20.465859048   16.50 16.2 15.7   ~ 97 1
24 RX J2217.4-3106 BLL 22 17 28.4667401640 -31 06 20.591042436       19.5   ~ 20 1
25 QSO B2223-114 BLL 22 25 43.71839166 -11 13 40.6978266       18.3   ~ 49 1
26 QSO B2233-148 BLL 22 36 34.08715104 -14 33 22.1896043 19.53 19.13 18.66 18.05   ~ 172 1
27 QSO B2254-204 BLL 22 56 41.2074627672 -20 11 40.512113340   19.04 18.5 18.18   ~ 98 1
28 1RXS J231027.0-371926 BLL 23 10 28.0712705472 -37 19 09.331273992       19.5   ~ 14 0
29 QSO B2342-153 BLL 23 45 22.38264 -15 15 05.8968     19.22 19.4   ~ 24 0
30 1RXS J235730.1-171801 BLL 23 57 29.9869021296 -17 18 03.318343812       16.9   ~ 42 1

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