2009AJ....137..337S

Query : 2009AJ....137..337S

2009AJ....137..337S - Astron. J., 137, 337-346 (2009/January-0)

European Southern Observatory Very Large Telescope optical spectroscopy of BL Lacertae objects. III. An extension of the sample.

SBARUFATTI B., CIPRINI S., KOTILAINEN J., DECARLI R., TREVES A., VERONESI A. and FALOMO R.

Abstract (from CDS):

We present results of an ongoing program at the European Southern Observatory Very Large Telescope for spectroscopy of BL Lac objects (BLLs) lacking a firm redshift estimate, and here we report on 15 objects. For 11 sources we confirm the BL Lac classification, and determine new redshifts for three objects, one with weak emission lines (PKS 1057-79, z = 0.569) and two with absorptions from the host galaxy (RBS 1752, z = 0.449; RBS 1915, z = 0.243); moreover, a subdamped Lyα system is detected in the direction of the BL Lac PKS 0823-223 (z ≥ 0.911). For the remaining eight BLLs, from the very absence of absorption lines of the host galaxy, lower limits to the redshift are deduced with zmin in the interval 0.20-0.80. The remaining three sources are reclassified as a FSRQ (PKS 1145-676, z = 0.210; TXS 2346+052, z = 0.419) and a misclassified galactic star (PMNJ 1323-3652).

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Journal keyword(s): BL Lacertae objects: general

Simbad objects: 17

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Number of rows : 17
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 B0019+058 BLL 00 22 32.44121084 +06 08 04.2689202   19.2   19.07   ~ 152 1
2 QSO B0109+224 BLL 01 12 05.8247044608 +22 44 38.785880796   16.00 15.66 15.47   ~ 373 2
3 1RXS J014040.9-075850 BLL 01 40 40.8911639232 -07 58 48.990888084       18.5   ~ 32 0
4 QSO B0823-223 BLL 08 26 01.5730900658 -22 30 27.204409684   16.11 16.20     ~ 224 1
5 GRO J1044-77 gam 10 55 38 -76 11.0           ~ 15 1
6 QSO B1057-797 BLL 10 58 43.30979475 -80 03 54.1598058   19.08   17.31   ~ 211 1
7 QSO B1145-676 Bla 11 47 33.39959532 -67 53 41.7696668   19.66   16.6   ~ 61 1
8 7C 1147+2434 BLL 11 50 19.21218244 +24 17 53.8352318   16.26 15.74 15.80   ~ 294 1
9 AT20G J132345-365336 BLL 13 23 45.87639 -36 53 37.8414     21.90 19.1   ~ 11 2
10 QSO B1407+022 BLL 14 10 04.65596596 +02 03 06.9124962   19.08 18.39 18.65   ~ 64 1
11 NVSS J153909-065843 BLL 15 39 09.6684080712 -06 58 43.220227548     20.00 19.6   ~ 15 0
12 ICRF J183427.4-585636 BLL 18 34 27.4725846624 -58 56 36.276668880   20.74 19.70     ~ 37 1
13 PKS J2009-4849 BLL 20 09 25.3903899240 -48 49 53.725051056   15.75 12.81 11.41   ~ 604 1
14 1RXS J213135.5-091525 BLL 21 31 35.4233915640 -09 15 23.693668272     18.00 17.5   ~ 73 1
15 2MASS J22561332-3303386 BLL 22 56 13.3204162224 -33 03 38.527749144     17.20     ~ 21 0
16 ICRF J234921.0+053439 BLL 23 49 21.0517158456 +05 34 39.865760256     19.50 18.8   ~ 41 1
17 1RXS J235730.1-171801 BLL 23 57 29.9869021296 -17 18 03.318343812       16.9   ~ 42 1

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