The BL Lac object OJ 287 (z=0.306) is a highly variable, low-energy peakedblazar, which has shown intermittent emission with outstanding pseudo-periodicoutbursts every 11-12 years. Long-term and densely-sampled light curves havebeen collected in the radio and optical bands since 1891. We aim at studying thespectral and temporal behaviour of OJ 287, on both long and short time scales,in the radio, mm, optical, UV and X-ray band, before the next major outburst,expected to occur in spring or fall 2006. Ground-based multifrequency campaignshave already been planned in the frame of the WEBT and ENIGMA collaborations andVLBI observations proposed, in order to search for correlations among thesynchrotron radio-mm flux, the parsec jet structure and the inverse-Compton X-ray emission.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2005-04-12T13:13:21Z/2005-11-04T13:11:32Z
Version
17.56_20190403_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
European Space Agency, Dr Stefano Ciprini, 2006, 'Multifrequency variability of OJ 287 before and during the next outburst', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-czsavaq
