2003AJ....125..572H

Query : 2003AJ....125..572H

2003AJ....125..572H - Astron. J., 125, 572-579 (2003/February-0)

Redshifts of candidate gamma-ray blazars.

HALPERN J.P., ERACLEOUS M. and MATTOX J.R.

Abstract (from CDS):

We identify 16 optical counterparts of blazars that have been suggested as sources of high-energy gamma-ray emission detected by the EGRET instrument on board the Compton Gamma-Ray Observatory. Nine new redshifts are obtained, as well one contradiction and two confirmations of published redshifts ranging from z=0.566 to z=3.00. The optical spectra of four objects are featureless, including high signal-to-noise spectra of the likely counterparts of 3EG J0433+2908 and GeV J0508+0540, which, if at low redshift, would be attractive targets to search for TeV emission using atmospheric Cerenkov telescopes, because they emit above 10 GeV. However, the combination of spectroscopy and CCD imaging of those objects shows no evidence for their underlying host galaxies, which probably means that z>0.3, diminishing their prospects as TeV sources.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: BL Lacertae Objects: General - Gamma Rays

Simbad objects: 26

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Number of rows : 26
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 J0325+2224 Bla 03 25 36.81435345 +22 24 00.3656161     18.90 19.14   ~ 135 1
2 3EG J0329+2149 gam 03 30 +21.8           ~ 11 0
3 RX J0433.6+2906 BLL 04 33 37.82985981 +29 05 55.4770576   19.0 17.80 17.06   ~ 181 1
4 QSO B0446+113 BLL 04 49 07.67110194 +11 21 28.5963618     20.00 18.58   ~ 305 1
5 PMN J0509+0541 BLL 05 09 25.9644373872 +05 41 35.333820420 15.32 14.95 14.78 15.12   ~ 589 2
6 6C 052927+482100 Bla 05 33 15.86579115 +48 22 52.8077787     19.90     ~ 150 1
7 6C 073840+545153 BLL 07 42 39.79069953 +54 44 24.6671050     16.90     ~ 138 1
8 6C 080315+512601 Bla 08 07 01.0136138448 +51 17 38.674795668   18.89 18.54 17.64   ~ 69 2
9 RX J0809.8+5218 BLL 08 09 49.1868285744 +52 18 58.249938744   16.11 15.59 14.6   ~ 302 1
10 [VV98] J085009.6-121334 Bla 08 50 09.63563375 -12 13 35.3761390     16.80 16.02   ~ 162 1
11 [VV2006] J113624.5-033029 Bla 11 36 24.57693472 -03 30 29.4966741   19.81 19.47 18.7   ~ 56 1
12 2EG J1136-0414 gam 11 37 -04.2           ~ 10 0
13 [VV2006] J123932.7+044305 Bla 12 39 32.75568115 +04 43 05.2330218   20.81 20.56 18.1   ~ 191 2
14 RX J1428.5+4240 BLL 14 28 32.6090008440 +42 40 21.048123396   16.95 16.45 14.4   ~ 549 1
15 6C 142744+541929 Bla 14 29 21.87879031 +54 06 11.1228062   20.73 20.39 20.5   ~ 108 1
16 2EG J1430+5356 gam 14 30 +53.9           ~ 12 1
17 GRO J1709-03 gam 17 08 -03.8           ~ 8 0
18 ICRF J171017.2-035550 BLL 17 10 17.20537034 -03 55 50.1286949   21.5 20.5 18.7   ~ 34 1
19 7C 181142.10+295145.00 Bla 18 13 37.26680786 +29 52 37.8708209     19.00 18.90   ~ 33 1
20 GRO J1815+30 gam 18 15 +29.8           ~ 7 0
21 [VV2006] J182625.1+014940 Bla 18 26 25.06114219 +01 49 40.1194468     19.90 18.5   ~ 29 1
22 GRO J1834+01 gam 18 29 +01.7           ~ 20 0
23 QSO B1908-202 Bla 19 11 09.65289294 -20 06 55.1090664   18.21   18.14   ~ 306 1
24 [VV2006] J192332.2-210433 Bla 19 23 32.18981392 -21 04 33.3331234   15.32 17.50 16.70   ~ 180 3
25 [VV2006] J200556.6-231027 Bla 20 05 56.59553204 -23 10 27.0097030     19.30     ~ 86 1
26 QSO J2015+371 BLL 20 15 28.72978661 +37 10 59.5147372     21.82 21.4   ~ 324 2

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