Skip to main content

BL Lacertae: long-term, intraday and intrahour variability

Buy Article:

$60.90 plus tax (Refund Policy)


We present preliminary results of the optical observations of BL Lacertae during the period June-November 2001 carried out using an ST-6 charge-coupled device camera attached to the Newtonian focus of the 70 cm meniscus telescope of the Abastumani Observatory. The aim of these observations is to study the long-term variability, intranight variability and intrahour variability of BL Lacertae.

The overall long-term variation in the R band has a magnitude of 1.80 (rms, 0.03). We also demonstrated that the typical average amplitudes of the intraday variability and the intrahour variability in the R band are of magnitudes 0.30 ± 0.02 and 0.10 ± 0.01 respectively. The maximum amplitudes of both types of variation are of magnitude 0.40 ± 0.02.

Keywords: Active galaxies; BL Lacertae; Quasars

Document Type: Research Article


Affiliations: 1: Abastumani Observatory 383762 Abastumani Georgia 2: Astrophysical Institute of Potsdam An der Sternwarte 16 D-14482 Potsdam Germany

Publication date: August 1, 2003

More about this publication?

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Partial Open Access Content
Partial Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more