scholarly journals ZBLLAC: A Spectroscopic Database of BL Lacertae Objects

2020 ◽  
Vol 250 (2) ◽  
pp. 37
Author(s):  
Marco Landoni ◽  
R. Falomo ◽  
S. Paiano ◽  
A. Treves
Keyword(s):  
Bl Lacertae Objects ◽  
Bl Lacertae ◽  
Spectroscopic Database

scholarly journals Astrophysical implications of binary black holes in BL Lacertae objects

2002 ◽  
Vol 388 (2) ◽  
pp. 470-476 ◽  
Author(s):  
F. De Paolis ◽  
G. Ingrosso ◽  
A. A. Nucita
Keyword(s):  
Black Holes ◽  
Bl Lacertae Objects ◽  
Binary Black Holes ◽  
Bl Lacertae

scholarly journals Longterm optical monitoring of bright BL Lacertae objects with ATOM: Spectral variability and multiwavelength correlations

2014 ◽  
Vol 573 ◽  
pp. A69 ◽  
Author(s):  
Alicja Wierzcholska ◽  
Michał Ostrowski ◽  
Łukasz Stawarz ◽  
Stefan Wagner ◽  
Marcus Hauser
Keyword(s):  
Optical Monitoring ◽  
Spectral Variability ◽  
Bl Lacertae Objects ◽  
Bl Lacertae

scholarly journals Polarization VLBI Observations of a Complete Sample of Northern BL Lacertae Objects

1998 ◽  
Vol 164 ◽  
pp. 165-166
Author(s):  
A. B. Pushkarev ◽  
D. C. Gabuzda
Keyword(s):  
Magnetic Field ◽  
Radio Emission ◽  
Synchrotron Emission ◽  
Complete Sample ◽  
Bl Lacertae Objects ◽  
Bl Lacertae ◽  
Vlbi Observations ◽  
Core Components ◽  
Jet Structure ◽  
The Magnetic Field

AbstractThe polarization electric vectors in the VLBI jets of BL Lacertae objects are typically aligned with the jet structure. If the jet radio emission is optically thin synchrotron emission, this implies that the magnetic field is perpendicular to the jet, usually interpreted as a signature of shocks. The distribution of polarization position angles in the VLBI core components appears to be bimodal, with the polarization angles either aligned with or perpendicular to the jet direction. In order to study the origin of this characteristic polarization structure, we have made VLBI polarization observations of all 34 sources in the Kühr and Schmidt sample of BL Lacertae objects.

scholarly journals Host galaxy subtraction of TeV candidate BL Lacertae objects

2007 ◽  
Vol 475 (1) ◽  
pp. 199-207 ◽  
Author(s):  
K. Nilsson ◽  
M. Pasanen ◽  
L. O. Takalo ◽  
E. Lindfors ◽  
A. Berdyugin ◽  
...  
Keyword(s):  
Host Galaxy ◽  
Bl Lacertae Objects ◽  
Bl Lacertae

scholarly journals The intraday variability in the radio-selected and X-ray-selected BL Lacertae objects

1998 ◽  
Vol 132 (1) ◽  
pp. 83-92 ◽  
Author(s):  
J. M. Bai ◽  
G. Z. Xie ◽  
K. H. Li ◽  
X. Zhang ◽  
W. W. Liu
Keyword(s):  
Bl Lacertae Objects ◽  
X Ray ◽  
Bl Lacertae ◽  
Intraday Variability

scholarly journals Multiepoch Very Long Baseline Array Observations of EGRET‐detected Quasars and BL Lacertae Objects: Connection between Superluminal Ejections and Gamma‐Ray Flares in Blazars

2001 ◽  
Vol 556 (2) ◽  
pp. 738-748 ◽  
Author(s):  
Svetlana G. Jorstad ◽  
Alan P. Marscher ◽  
John R. Mattox ◽  
Margo F. Aller ◽  
Hugh D. Aller ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Bl Lacertae Objects ◽  
Bl Lacertae ◽  
Long Baseline ◽  
Very Long Baseline Array

scholarly journals Polarization and Variations of BL Lacertae Objects

2001 ◽  
Vol 53 (2) ◽  
pp. 201-205 ◽  
Author(s):  
J. H. Fan ◽  
K. S. Cheng ◽  
L. Zhang
Keyword(s):  
Bl Lacertae Objects ◽  
Bl Lacertae

ESO Very Large Telescope Optical Spectroscopy of BL Lacertae Objects. I. New Redshifts

2005 ◽  
Vol 129 (2) ◽  
pp. 559-566 ◽  
Author(s):  
B. Sbarufatti ◽  
A. Treves ◽  
R. Falomo ◽  
J. Heidt ◽  
J. Kotilainen ◽  
...  
Keyword(s):  
Optical Spectroscopy ◽  
Large Telescope ◽  
Bl Lacertae Objects ◽  
Bl Lacertae ◽  
Very Large Telescope

scholarly journals The variability and periods in the BL Lac AO 0235+164

2014 ◽  
Vol 10 (S313) ◽  
pp. 81-82
Author(s):  
J. H. Fan ◽  
O. Kurtanidze ◽  
X. Liu ◽  
Y. Liu ◽  
H. T. Wang ◽  
...  
Keyword(s):  
Ccd Camera ◽  
Monitoring Programme ◽  
Bl Lacertae Objects ◽  
Monitoring Period ◽  
Bl Lacertae ◽  
Periodicity Analysis ◽  
Photometric Observations ◽  
Bl Lac ◽  
Primary Focus ◽  
Electro Magnetic

AbstractVariability is one of the extreme observational properties of BL Lacertae objects. AO 0235+164 is a well studied BL Lac through the whole electro-magnetic wavebands, it is violently variable in the optical bands. In the present work, we show its optical R band photometric observations carried out during the period of Nov. 2006 to Dec. 2012 using the Ap6E CCD camera attached to the primary focus of the 70 cm meniscus telescope at Abastumani Observatory, Georgia. It shows a large variation of ΔR = 4.88 mag (14.20 - 19.08 mag) during our monitoring period. When periodicity analysis methods are adopted to its R observations from our Abastumani monitoring programme and those in the literature, the signs of some periods, P1 = 8.26 yr, P2 = 0.55 yr, P3 = 0.85 yr, P4 = 1.99 yr are found.

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