2009ApJ...699..732B


Query : 2009ApJ...699..732B

2009ApJ...699..732B - Astrophys. J., 699, 732-741 (2009/July-1)

The unusual spectral energy distribution of LBQS 0102-2713.

BOLLER Th., LINGURI K., HEFTRICH T. and WEIGAND M.

Abstract (from CDS):

We have studied the spectral energy distribution of the quasar LBQS 0102-2713. The available multiwavelength data in the observers frame are one optical spectrum between 3200 and 7400 Å, seven Hubble Space Telescope (HST) Faint Object Spectrograph (FOS) spectra between 1700 and 2300 Å, one GALEX NUV flux density and a KS magnitude obtained from NASA/IPAC Extragalactic Database, and three public ROSAT PSPC pointed observations in the 0.1-2.4 keV energy band. The αox values obtained from the HST FOS, the optical spectrum, and the ROSAT observations are -2.3 and -2.2, respectively, comparable to broad absorption line (BAL) quasars. The 2500 Å luminosity density is about a factor of 10 higher compared to the mean of the most luminous Sloan Digital Sky Survey quasars. The 2 keV νLν value is lower by about a factor of 10 compared to the radio-loud quasars shown in Figure 10 of Richards et al. LBQS 0102-2713 exhibits one of the steepest soft X-ray photon indices obtained so far. For a simple power-law fit with leaving the NH free in the fit, we obtain a photon index of Γ = 6.0±1.3. Fixing the NH value to the Galactic value, the photon index still remains steep with a value of about 3.5. We argue that LBQS 0102-2713 is similar to BAL quasars with respect to their UV brightness and 2 keV X-ray weakness. However, the absorption by neutral matter is significantly lower compared to BAL quasars. The X-ray weakness is most probably not due intrinsically X-ray weakness based on the UV line strengths which are comparable to the line strength values reported in quasar composites. If the X-ray weakness will be confirmed in future observations, LBQS 0102-2713 might be indicative for a new class of quasars with an unusual combination in their UV, X-ray, and NHproperties.

Abstract Copyright:

Journal keyword(s): galaxies: nuclei - galaxies: photometry - quasars: individual: LBQS 0102-2713

Simbad objects: 39

goto Full paper

goto View the references in ADS

Number of rows : 39
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 Mrk 335 Sy1 00 06 19.5372339024 +20 12 10.617404076   14.19 13.85     ~ 1195 0
2 LEDA 87392 Sy1 00 39 15.8339634552 -51 17 01.481641692   15.77 15.28 15.66   ~ 126 0
3 2dFGRS TGS212Z166 G 01 04 20.08 -26 56 41.7   19.142   17.859   ~ 2 0
4 GSA 55 G 01 04 27 -27 03.5           ~ 2 0
5 2MASX J01042726-2655252 G 01 04 27.2589623712 -26 55 24.803338152           ~ 1 0
6 UCAC4 316-001133 * 01 04 28.5737400552 -26 51 19.199215116   15.570 14.837 14.848   G5/8 4 0
7 2dFGRS TGS212Z165 G 01 04 28.90 -26 50 53.8   19.358   18.854   ~ 2 0
8 2dFGRS TGS213Z278 G 01 04 28.96 -26 55 39.6   19.281   18.315   ~ 2 0
9 2dFGRS TGS212Z164 G 01 04 32.79 -26 50 11.1   19.139   17.979   ~ 2 0
10 GSGP 1 * 01 04 33.3 -27 00 23   17.69 17.68     ~ 4 0
11 APMUKS (BJ) B010210.33-271359.0 G 01 04 34.7 -26 57 55           ~ 1 0
12 APMUKS (BJ) B010210.57-271755.8 G 01 04 34.9 -27 01 51           ~ 1 0
13 DRIL 18 * 01 04.6 -27 00   12.97 12.21     ~ 2 0
14 PHL 7126 blu 01 04.6 -26 58   18.0       ~ 1 0
15 APMUKS (BJ) B010212.20-271714.6 G 01 04 36.6 -27 01 10           ~ 1 0
16 APMUKS (BJ) B010215.35-271953.3 G 01 04 39.7 -27 03 49           ~ 1 0
17 APMUKS (BJ) B010215.35-271559.7 G 01 04 39.7 -26 59 55           ~ 1 0
18 LBQS 0102-2713 QSO 01 04 41.0003434008 -26 57 07.385601492   17.8       ~ 29 0
19 1RXS J010441.1-265712 X 01 04 41.1 -26 57 12           ~ 1 0
20 APMUKS (BJ) B010217.75-271619.8 G 01 04 42.1 -27 00 16           ~ 1 0
21 2dFGRS TGS213Z276 G 01 04 44.00 -26 55 38.1   18.592   17.109   ~ 2 0
22 2dFGRS TGS212Z160 G 01 04 44.36 -26 57 04.7   18.940   18.069   ~ 2 0
23 2MASX J01044626-2659591 G 01 04 46.2828675408 -26 59 59.789817888   18.180   16.991   ~ 3 0
24 GD 675 RR* 01 04 47.0326595280 -26 59 11.489968500   16.7 16.51 16.07   ~ 11 0
25 APMUKS (BJ) B010224.51-270526.6 G 01 04 48.9 -26 49 23           ~ 1 0
26 2dFGRS TGS213Z275 G 01 04 56.3 -26 56 26   18.627   17.585   ~ 3 0
27 RG 0102.6-2720 * 01 05.0 -27 04     20.06     ~ 2 0
28 UCAC2 20765378 * 01 05 03.7707824856 -26 51 44.969604768   13.624 12.968 12.963   G5 4 0
29 APMUKS (BJ) B010241.39-271015.9 G 01 05 05.7 -26 54 12           ~ 1 0
30 APMUKS (BJ) B010245.29-270904.2 G 01 05 09.6 -26 53 01           ~ 1 0
31 APMUKS (BJ) B010251.36-271413.7 G 01 05 15.7 -26 58 10           ~ 1 0
32 APMUKS (BJ) B010252.42-271158.3 G 01 05 16.7 -26 55 55           ~ 1 0
33 2MASS J01395577+0619225 Sy1 01 39 55.7697705024 +06 19 22.520805888   16.80 17.00     ~ 170 0
34 LEDA 88588 Sy1 07 08 41.4886614696 -49 33 06.308921700   16.02 15.7 12.7   ~ 479 0
35 Z 212-25 Sy1 10 34 38.5982990352 +39 38 28.187042604   17.37 16.90     ~ 340 1
36 LBQS 1244+0238 Sy1 12 46 35.2527826632 +02 22 08.782546368   16.57 16.37     ~ 278 0
37 LEDA 88835 Sy1 13 25 19.3805530608 -38 24 52.611680340   16.64 13.80 15.33   ~ 390 0
38 PHL 1811 Sy1 21 55 01.5124437432 -09 22 24.349496808   13.9 16.8 14.1   ~ 175 1
39 2MASS J22484115-5109532 Sy1 22 48 41.1707472480 -51 09 53.322381180   15.60 15.43 15.5   ~ 67 0

To bookmark this query, right click on this link: simbad:objects in 2009ApJ...699..732B and select 'bookmark this link' or equivalent in the popup menu


2022.11.28-17:02:15

© Université de Strasbourg/CNRS

    • Contact