| Name | 092377 |
| Title | Blazar Flares in Crisis at Multiwavelengths |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0923770201 |
| DOI | https://doi.org/10.57780/esa-l7x8c31 |
| Author | European Space Agency |
| Description | We request one 130ks XMM-Newton observation of a radio-flaring high-synchrotron-peaked BL Lac object that is affected by the so-called Doppler crisis. For this intriguing class of objects, previous radio observations have typically found sub-luminal apparent jet speeds while their bright, variable, very-high-energy TeV gamma-ray emission and multiwavelength spectral models suggest very-high Doppler factors. We will observe such an object with the Event Horizon Telescope (EHT) as part of a triggered proposal. In order to understand the multiwavelength emission and possibly resolve the Doppler crisis for this source we request quasi-simultaneous XMM-Newton observations, which will provide an independent probe of the Doppler factor by studying minute-scale variations in the X-ray light curve. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2023-02-27T23:44:29Z/2023-03-01T13:36:09Z |
| Version | 20.09_20221024_1724 |
| Mission Description | The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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 | 2024-03-22T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2024, Blazar Flares In Crisis At Multiwavelengths, 20.09_20221024_1724, European Space Agency, https://doi.org/10.57780/esa-l7x8c31 |