2001ApJ...551..103T

Query : 2001ApJ...551..103T

2001ApJ...551..103T - Astrophys. J., 551, 103-110 (2001/April-2)

Continuum variability of active galactic nuclei in the optical-ultraviolet range.

TREVESE D., KRON R.G. and BUNONE A.

Abstract (from CDS):

The variability of the continuum spectral energy distribution has been analyzed for a complete magnitude-limited sample of quasars in Selected Area 57, observed at two epochs in the photographic U, BJ, F, and N bands with the Mayall 4 m telescope at Kitt Peak National Observatory. Changes δα of the spectral slope α appear correlated with brightness variations δlogfν, indicating an average hardening of the spectrum in the bright phases. This confirms that the correlation of variability with redshift, found in a single observing band, is due to intrinsic spectral changes. The average observed δα-δlogfν relation is consistent with the spectral change due to temperature variation of a blackbody of about 2.5x104 K.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Active - Galaxies: Fundamental Parameters - Galaxies: Seyfert - Galaxies: Quasars: General - Techniques: Photometric

Simbad objects: 41

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Number of rows : 41
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 B1304+2938 QSO 13 07 12.652 +29 22 46.99   22.31 22.09     ~ 11 1
2 NGC 11019 5 Sy1 13 07 33.4533886200 +29 23 03.915876048   20.97 21.43 19.72   ~ 18 0
3 SDSS J130738.09+291626.4 QSO 13 07 38.0945344512 +29 16 26.390904816   20.61 20.04 19.71   ~ 15 0
4 [VV96] J130742.6+291935 QSO 13 07 42.631 +29 19 36.41   20.91 20.67 22.01   ~ 16 0
5 US 303 QSO 13 07 49.3636849440 +29 33 03.466888272   19.36 19.06     ~ 39 0
6 [VV96] J130750.0+290830 QSO 13 07 50.0833430136 +29 08 31.632525384   20.65 20.46     ~ 19 0
7 SA57X 51 QSO 13 08 01.659 +29 20 09.12   22.39 22.08 21.47   ~ 7 0
8 NGC 11426 4 Sy1 13 08 03.3865633704 +29 29 08.850855408   20.39   18.78   ~ 15 0
9 LEDA 3084991 Sy1 13 08 05.8938103776 +29 06 53.430538248     20.37     ~ 17 1
10 [VV96] J130806.1+292239 QSO 13 08 06.1539316896 +29 22 39.276956568   21.73 21.49 21.82   ~ 21 0
11 US 310 QSO 13 08 08.5125059952 +29 34 49.149123096   19.60 19.30 19.23   ~ 20 0
12 [VV96] J130812.1+292513 QSO 13 08 11.9201013240 +29 25 12.641278440   19.07 18.79 19.01   ~ 41 0
13 QSO B1305+2930 QSO 13 08 12.1970897856 +29 14 59.120452932   21.60 21.09 21.30   ~ 14 0
14 [VV96] J130813.2+292244 QSO 13 08 13.2339219072 +29 22 44.159737836   20.83 20.64 20.05   ~ 14 0
15 QSO B1305+2932 QSO 13 08 15.747 +29 16 12.27   21.92 21.37 20.74   ~ 19 0
16 PB 3340 QSO 13 08 16.0798320672 +29 19 17.796945036   19.37 19.18 19.06   ~ 28 0
17 QSO B1306+2938 QSO 13 08 23.3297741688 +29 22 34.290406488   22.29 21.97 21.50   ~ 15 0
18 QSO B1306+2946 QSO 13 08 24.3872446008 +29 30 36.742821624   20.88 20.79 20.71   ~ 22 1
19 QSO B1306+2924 QSO 13 08 25.1809991400 +29 07 46.485625188   20.88 20.69     ~ 21 0
20 [VV96] J130826.8+291528 QSO 13 08 27.2263002432 +29 15 25.229215368   20.60 20.28 20.16   ~ 20 0
21 QSO B1306+2941 QSO 13 08 30.403 +29 25 01.90   21.67 21.44 22.07   ~ 21 0
22 [VV96] J130830.4+290844 QSO 13 08 30.418 +29 08 43.79   21.69 21.43     ~ 9 0
23 QSO B1306+295 QSO 13 08 32.0975801952 +29 19 12.003847896   19.83 19.76 20.34   ~ 19 0
24 SA 57- reg 13 08 38 +29 23.1           ~ 179 0
25 [VV96] J130839.5+291849 QSO 13 08 39.761 +29 18 50.27   20.64 20.30 20.55   ~ 14 0
26 SDSS J130840.67+290835.6 QSO 13 08 40.6862952696 +29 08 35.666645496   21.04 20.79     ~ 14 0
27 QSO B1306+2944 QSO 13 08 44.1383224200 +29 28 40.300030488   20.93 20.75 20.96   ~ 15 0
28 QSO B1306+294 QSO 13 08 49.6462787688 +29 12 44.744537628   20.05 19.88 19.91   ~ 20 0
29 KKC 51 AGN 13 08 51.3 +29 37 58     21.85     ~ 9 0
30 NGC 10432 6 Sy1 13 08 53.6 +29 14 06     21.33     ~ 9 0
31 PB 3349 QSO 13 08 59.1213550920 +29 05 58.582111596   19.1 18.37     ~ 34 0
32 [VV96] J130903.9+293636 QSO 13 09 03.9565151952 +29 36 36.704065824   20.23 19.77     ~ 16 0
33 [VV96] J130904.7+291729 QSO 13 09 04.779 +29 17 29.43   20.91 20.64 22.62   ~ 13 0
34 QSO B1306+2943 QSO 13 09 06.320 +29 27 48.26   22.19 21.95 21.85   ~ 12 0
35 QSO B1306+2951 QSO 13 09 10.050 +29 35 25.36   21.77 21.57     ~ 10 0
36 [VV96] J130911.9+291552 QSO 13 09 11.8695721128 +29 15 52.550801208   20.00 19.64 19.98   ~ 17 0
37 2XMM J130920.5+291459 AGN 13 09 20.4904 +29 14 58.690   22.22 21.81 21.70   ~ 13 0
38 QSO B1307+2927 QSO 13 09 26.484 +29 11 46.77   21.54 21.26     ~ 10 0
39 SDSS J130926.81+291306.2 AGN 13 09 26.81403 +29 13 06.2943   22.09 21.92     ~ 9 0
40 NGC 10533 4 Sy2 13 09 44.0 +29 15 47           ~ 7 0
41 [VV96] J130945.9+292433 QSO 13 09 45.9383634624 +29 24 33.771972924   21.55 21.16     ~ 6 0

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