The intraday variability in the radio-selected and X-ray-selected BL Lacertae objects
Abstract
Seven BL Lac objects have been photometrically observed in an effort to study the difference of optical intraday variability between the radio-selected BL Lac objects (RBLs) and X-ray-selected BL Lac objects (XBLs). The objects we observed are selected arbitrarily. They are four RBLs, PKS 0735+178, PKS 0754+101, OJ 287 and BL Lac, and three XBLs, H 0323+022, H 0548-322 and H 2154-304. During the observation all of them exhibited microvariation, and H 0323+022 and H 0548-322 sometimes showed brightness oscillation. PKS 0735+178 and BL Lac were in their faint states and not very active. It seems that RBLs do not show microvariability more frequently than XBLs. Table 2 is only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5)
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- October 1998
- DOI:
- 10.1051/aas:1998360
- Bibcode:
- 1998A&AS..132...83B
- Keywords:
-
- BL LACERTAE OBJECTS: GENERAL;
- GALAXIES: PHOTOMETRY