2003ApJ...590..123V

Query : 2003ApJ...590..123V

2003ApJ...590..123V - Astrophys. J., 590, 123-127 (2003/June-2)

Spectral slope variability of BL Lacertae objects in the optical band.

VAGNETTI F., TREVESE D. and NESCI R.

Abstract (from CDS):

Light curves of eight BL Lac objects in the BVRI bands have been analyzed. All of the objects tend to be bluer when brighter. However, spectral slope changes differ quantitatively from those of a sample of QSOs analyzed in a previous paper by Trevese & Vagnetti and appear to be consistent with a different nature of the optical continuum. A simple model representing the variability of a synchrotron component can explain the spectral changes. Constraints on a possible thermal accretion disk component contributing to the optical luminosity are discussed.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: BL Lacertae Objects: Individual: Alphanumeric: 3C 66A - Galaxies: BL Lacertae Objects: Individual: Alphanumeric: OJ 287 - Galaxies: BL Lacertae Objects: Individual: Alphanumeric: ON 231 - Galaxies: BL Lacertae Objects: Individual: Alphanumeric: OQ 530 - Galaxies: BL Lacertae Objects: Individual: Alphanumeric: PKS 0422+004 - Galaxies: BL Lacertae Objects: Individual: Alphanumeric: S5 0716+71 - Galaxies: BL Lacertae Objects: Individual: Alphanumeric: S5 1803+78 - Galaxies: BL Lacertae Objects: Individual: Name: BL Lacertae - Galaxies: Active - Galaxies: Quasars: General

Simbad objects: 10

goto Full paper

goto View the references in ADS

Number of rows : 10
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 3C 66A BLL 02 22 39.6114771888 +43 02 07.799534304   15.71 15.21 14.5   ~ 942 2
2 QSO B0422+004 BLL 04 24 46.8421990080 +00 36 06.329375028 16.15 15.94 16.98     ~ 378 1
3 8C 0716+714 BLL 07 21 53.4482942664 +71 20 36.363846516   15.5 15.50 14.27   ~ 1388 1
4 PG 0851+202 BLL 08 54 48.8749846272 +20 06 30.639583620   15.649 15.146 15.446   ~ 2513 1
5 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
6 7C 1219+2830 BLL 12 21 31.6904439888 +28 13 58.500308172   16.81 16.11 14.24   ~ 924 1
7 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
8 6C 141804+543700 BLL 14 19 46.5974051952 +54 23 14.787857796   16.17 15.65 14.16   ~ 630 1
9 1RXS J180043.6+782806 BLL 18 00 45.6838528560 +78 28 04.018028016   16.4 15.90 16.134   ~ 793 1
10 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1

To bookmark this query, right click on this link: simbad:objects in 2003ApJ...590..123V and select 'bookmark this link' or equivalent in the popup menu