2006A&A...460..665D


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.12CET11:40:55

2006A&A...460..665D - Astronomy and Astrophysics, volume 460, 665-672 (2006/12-4)

Optical and near-infrared simultaneous observations of the BL Lacs PKS 2005-489 and PKS 2155-304.

DOMINICI T.P., ABRAHAM Z. and GALO A.L.

Abstract (from CDS):

In this work, we looked for simultaneous brigthness variations in the optical and near-infrared bands in the TeV BL Lacs PKS 2005-489 and PKS 2155-304, covering time scales from minutes to a few years. Between 2001 and 2003, we carried out optical and near-infrared observations using two telescopes at the Pico dos Dias Observatory (LNA, Brazil), reaching a time resolution in the light curves of about 14min at optical wavelengths and 6 min in the infrared. For both sources the variability analysis was done after the contribution of the host galaxy was subtracted from the observed flux. In PKS 2005-489 we detected for the first time optical and near-infrared variations on time scales of minutes. Both sources presented variability on different time scales and with complex and distinct spectral behavior. This behavior favors a scenario in which the variability is produced by the formation and fast evolution of shock waves in the quiescent or slowly varying nuclear jet.

Abstract Copyright:

Journal keyword(s): galaxies: BL Lacertae objects: individual: PKS 2005-489 - galaxies: BL Lacertae objects: individual: PKS 2155-304

Nomenclature: Fig.1: [DAG2006] PKS 2005-489 N (Nos 1-4), [DAG2006] PKS 2005-489 G N=1, [DAG2006] PKS 2155-304 N (Nos 1-6).

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 3C 66A BLL 02 22 39.6111630878 +43 02 07.797284539   15.71 15.21 14.5   ~ 774 1
2 QSO B0235+1624 BLL 02 38 38.93010 +16 36 59.2746   16.46 15.50 15.92   ~ 1369 2
3 8C 0716+714 BLL 07 21 53.4484901266 +71 20 36.362058601   15.5 14.17 14.27   ~ 1105 1
4 QSO B0736+01 QSO 07 39 18.03389693 +01 37 04.6178588   16.90 16.47 16.19   ~ 614 1
5 TYC 8400-900-1 * 20 09 05.4243541429 -48 47 20.973725069   12.984 11.878     ~ 3 0
6 [RP2003] U * 20 09 17.6771667416 -48 50 56.798581418   15.45 14.88     ~ 2 0
7 [RP2003] L * 20 09 19.0439267814 -48 46 43.272301443   15.38 14.41     ~ 2 0
8 QSO B2005-489 BLL 20 09 25.3910622923 -48 49 53.722146927   15.75 12.81 11.41   ~ 501 2
9 [RP2003] T * 20 09 40.0191210259 -48 50 21.845169910   15.89 14.92     ~ 2 0
10 QSO B2155-304 BLL 21 58 52.0651817803 -30 13 32.120657891   13.36 13.09 12.62   ~ 1521 1
11 TYC 7488-340-1 PM* 21 59 02.5021933190 -30 10 46.556998924   12.68 12.14     ~ 2 0
12 [DAT2004] PKS 2155-304 C3 PM* 21 59 05.3470168583 -30 10 50.954876170           ~ 2 0
13 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 1977 1

    Equat.    Gal    SGal    Ecl

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2019.12.12-11:40:55

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