CCD photometry of blazars at Abastumani Observatory

Kurtanidze, O. M.; Nikolashvili, M. G.; Kimeridze, G. N.; Sigua, L. A.; Kapanadze, Bidzina; Abuladze, O. P.; Chanturiya, S. M.; Ivanidze, R. Z.

doi:10.1016/j.nuclphysbps.2004.04.032

Cited by 2 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4). To the best of our knowledge, no results of previous intra-night optical monitoring of this object were published, and Kurtanidze et al (2004) found no variations on longer time scales. Our monitoring, however, indicates the presence of rapid intranight variability of up to 0.15 mag/hour.…”

Section: Individual Notesmentioning

confidence: 65%

The nature of the intra-night optical variability in blazars

Bachev

Semkov

Strigachev

et al. 2012

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

In this paper we present results of a short-term optical monitoring of 13 blazars. The objects were monitored mostly in the R-band for a total of ~ 160 hours between 2006 and 2011. We study the nature of the short-term variations and show that most of them could be described as slow, smooth, and (almost) linear changes of up to ~ 0.1 mag/hour, but many objects show no short-term variations at all. In fact, we found only ~ 2 per cent chance to observe variability of more than 0.1 mag/hour for the sample we observed. Hints for quasi-periodic oscillations at very low amplitude levels are also found for some objects. We briefly discuss some of the possible mechanisms to generate the intra-night variability and the quasi-periodic oscillations.Comment: 10 pages, 13 figures, 1 table, Accepted for Publication in MNRA

show abstract

Section: Individual Notesmentioning

confidence: 65%

The nature of the intra-night optical variability in blazars

Bachev

Semkov

Strigachev

et al. 2012

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

show abstract

“…The Abastumani Observatory observations were processed using the same check stars as the Lowell data. The frames were obtained using the Peltier cooled ST-6 CCD Camera attached to the Newtonian focus of the 70-cm meniscus telescope (Kurtanidze & Nikolashvili 2002;Kurtanidze et al 2004). All observations were performed using combined filters of glasses which match the standard B (Johnson) and Rc (Cousins) bands.…”

Section: Optical Data Reductionmentioning

confidence: 99%

Multiwavelength Observations of the Extreme X-Ray-selected BL Lacertae Object PG 1553+11 (1ES 1553+113)

et al. 2006

Self Cite

View full text Add to dashboard Cite

PG 1553+11 was the target of a coordinated 3 week multiwavelength campaign during 2003 April and May. A significant X-ray flare was observed during the second half of this campaign. Although no optical flare was recorded during the X-ray campaign, optical observations obtained immediately prior to the campaign displayed a flux higher than that recorded during the campaign. An optical flare was observed a few days after the end of the X-ray campaign and may be related to the X-ray flare. Radio observations were made at three frequencies, with no significant changes in flux detected near the times of the optical and X-ray flares. The spectral energy distributions and flux ratios in different wave bands observed for this object are compared to other X-ray-selected blazars to demonstrate that PG 1553+11 is an extreme member of this group.

show abstract

CCD photometry of blazars at Abastumani Observatory

Cited by 2 publications

References 13 publications

The nature of the intra-night optical variability in blazars

The nature of the intra-night optical variability in blazars

Multiwavelength Observations of the Extreme X-Ray-selected BL Lacertae Object PG 1553+11 (1ES 1553+113)

Contact Info

Product

Resources

About