
| Proposal ID | 065162 | 
| Title | HESS J1507-622: an unique unidentified source off the Galactic Plane | 
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0651620101 | 
| DOI | https://doi.org/10.5270/esa-yja9jsg | 
| Principal Investigator, PI | Dr Omar Tibolla | 
| Abstract | Galactic VHE gamma-ray sources in the inner Galaxy H.E.S.S. survey clusterwithin 1 deg in latitude around the Galactic plane. HESS J1507-622 instead isunique, since located at latitude of -3.5 degrees. No plausible counterpartshave been detected; and, given its position and hence the absorption almost oneorder of magnitude lower, it is very surprising to not see any counterpartsespecially at X-rays. Its latitude implies that it is either within about 1 kpcor is located well off the Galactic plane. The models reflect the uniqueness ofthis object: a leptonic scenario would locate the source at very large distan-ces, while it would be very close in hadronic scenarios. The high sensitivity ofXMM-Newton will shed light on the nature of this mysterious source. | 
| Publications | 
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 | 
| Temporal Coverage | 2011-03-02T12:54:14Z/2011-03-02T23:50:39Z | 
| 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. | 
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk | 
| Date Published | 2012-03-16T00:00:00Z | 
| Last Update | 2025-08-04 | 
| Keywords | "XMM", "magnitude lower", "shed light", "leptonic scenario", "XMM-Newton", "counterparts especially", "hess j1507 622", "hadronic scenarios", "distan ces", "xmm newton", "latitude implies", "unidentified source", "inner galaxy", "survey cluster", "galactic plane", "models reflect", "HESS" | 
| Publisher And Registrant | European Space Agency | 
| Credit Guidelines | European Space Agency, Dr Omar Tibolla, 2012, 'HESS J1507-622: an unique unidentified source off the Galactic Plane', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-yja9jsg |