| Proposal ID | 015290 |
| Title | XMM-Newton observation of a sample of HBL BL Lacs with extreme SEDs |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0152900201 |
| DOI | https://doi.org/10.5270/esa-krac8ae |
| Principal Investigator, PI | Dr Paolo Giommi |
| Abstract | We propose to observe with XMM-Newton 13 BL Lacs to perform an X-ray andmulti-frequency study of a complete sample of extreme high-energy-peaked -HBL-BL Lacs. These sources have been chosen from the Sedentary Survey, the largestexisting flux-limited and complete sample of BL Lacs, to be those with thehighest fx/fr ratio for which a detailed X-ray spectrum is not yet available. They are part of a larger and well defined sample partly observed with BeppoSAX.We will combine their X-ray spectra with OM optical grism data and observationsat other frequencies to determine their SEDs. This will allow us to make astatistically meaningful study of the particle acceleration and emissionmechanisms in a well-defined sample of BL Lacs. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2003-09-05T04:53:35Z/2003-09-05T06:53:59Z |
| 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 | 2004-10-11T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "sedentary survey", "complete sample", "defined sample partly", "xmm newton", "fr ratio", "xray spectra", "XMM-Newton", "statistically meaningful", "particle acceleration", "multi frequency", "BeppoSAX", "hbl bl lacs", "bl lacs", "XMM", "xray spectrum", "defined sample", "emission mechanisms" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Paolo Giommi, 2004, 'XMM-Newton observation of a sample of HBL BL Lacs with extreme SEDs', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-krac8ae |