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Intra-Night Variability of OJ 287 with Long-Term Multiband Optical Monitoring
- Source :
- Galaxies; Volume 5; Issue 4; Pages: 85, Galaxies, Vol 5, Iss 4, p 85 (2017)
- Publication Year :
- 2017
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2017.
-
Abstract
- We present long-term optical multi-band photometric monitoring of the blazar OJ 287 from 6 March 2010 to 3 April 2016, with high temporal resolution in the V R I -bands. The flux variations and colour-magnitude variations on long and short timescales were investigated to understand the emission mechanisms. In our observation, the major outbursts occurred in January 2016, as predicted by the binary pair of black holes model for OJ 287, with F v a r of 1.3∼2.1%, and variability amplitude (Amp) of 5.8∼9.0%. The intra-night variability (IDV) durations were from 18.5 to 51.3 min, and the minimal variability timescale was about 4.7 min. The colour-magnitude variation showed a weak positive correlation on the long timescale with Pearson’s r = 0 . 450 , while a negative correlation was found on intra-night timescales. We briefly discuss the possible physical mechanisms that are most likely to be responsible for the observed flux and colour-magnitude correlation variability.
- Subjects :
- Physics
quasar: individual: OJ 287
010308 nuclear & particles physics
lcsh:Astronomy
Flux
Astronomy and Astrophysics
Astrophysics
BL Lacertae objects: general
Positive correlation
01 natural sciences
Term (time)
lcsh:QB1-991
galaxies: photometry
Amplitude
0103 physical sciences
High temporal resolution
Negative correlation
Blazar
010303 astronomy & astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 20754434
- Database :
- OpenAIRE
- Journal :
- Galaxies; Volume 5; Issue 4; Pages: 85
- Accession number :
- edsair.doi.dedup.....95f8ecf381e517027b224419c31c7866
- Full Text :
- https://doi.org/10.3390/galaxies5040085