| Proposal ID | 020250 |
| Title | UNRAVELLING THE NATURE OF GT 2318+620: RADIO-JET X-RAY BINARY OR BL LAC |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0202500201 |
| DOI | https://doi.org/10.5270/esa-gcs02ur |
| Principal Investigator, PI | Mr PANU MUHLI |
| Abstract | 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. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2004-06-25T00:12:13Z/2004-06-25T03:38:10Z |
| Version | 21.51_20241115_1113 |
| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2005-07-27T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "bl lac", "reliable xray detection", "gt 2318", "variability characteristics", "uhuru xray source", "extragalactic object", "XMM", "bl lacertae objects", "xray spectrum", "featureless spectrum" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Mr PANU MUHLI, 2005, 'UNRAVELLING THE NATURE OF GT 2318+620: RADIO-JET X-RAY BINARY OR BL LAC', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-gcs02ur |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |