We propose to use XMM to pin down the classification of the as yet undefinedsource GT 2318+620 as a Galactic or an extragalactic object. This target hasbeen suggested to be a Radio-Jet X-Ray Binary, based on radio observations andits possible association with one Uhuru X-ray source. Our optical studies of thesource revealed a red, almost featureless spectrum and faint extended emissionaround a point-like core, more characteristic of BL Lacertae objects. Using XMMwe wish to obtain the first reliable X-ray detection of GT 2318+620 anddetermine the true nature of this peculiar source by a careful examination ofits X-ray spectrum and variability characteristics. XMM observations will becomplemented by simultaneous ground-based optical, near-IR and radio studies.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2004-06-25T00:12:13Z/2004-06-25T03:38:10Z
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, Mr PANU MUHLI, 2005, 'UNRAVELLING THE NATURE OF GT 2318+620: RADIO-JET X-RAY BINARY OR BL LAC', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-gcs02ur
