A dataset provided by the European Space Agency

Name 074082
Title BL Lac Objects at the highest redshifts


DOI https://doi.org/10.5270/esa-ud46kdn
Author Dr Marco Ajello
Description For a long time high-redshift BL Lac objects were deemed not to exist. Fermi showed us that there is r^ant population of BL Lacs with redshift beyond 1.0. Some of them belong to the high-synchrotron peaked (HSP) class and are among the hardest gamma-ray sources detected by Fermi showing emission up and beyond 100 GeV. This makes them the most luminous BL Lacs ever detected and rates them among the most powerful accelerators in the Universe. We plan to observe 3 extreme BL Lacs simultaneously with XMM-Newton, GROND and Swift. This will provide unprecedented coverage of the synchrotron peak from IR to hard X-ray allowing us: to understand the nature and the energetic of these objects, to answer long-standing questions on the blazar sequence and to use them as probes of the EBL.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2014-09-01T05:24:19Z/2015-01-05T01:12:00Z
Version 17.56_20190403_1200
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 2016-01-27T23:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2016-01-27T23:00:00Z, 074082, 17.56_20190403_1200. https://doi.org/10.5270/esa-ud46kdn