A dataset provided by the European Space Agency

Name: BL Lac Objects at the highest redshifts
Published: 2016-01-27T23:00:00Z

Proposal ID	074082
Title	BL Lac Objects at the highest redshifts
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0740820401 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0740820501 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0740820601
DOI	https://doi.org/10.5270/esa-ud46kdn
Principal Investigator, PI	Dr Marco Ajello
Abstract	For a long time high-redshift BL Lac objects were deemed not to exist. Fermishowed 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 thehardest gamma-ray sources detected by Fermi showing emission up and beyond 100GeV. This makes them the most luminous BL Lacs ever detected and rates themamong the most powerful accelerators in the Universe. We plan to observe 3extreme BL Lacs simultaneously with XMM-Newton, GROND and Swift. This willprovide unprecedented coverage of the synchrotron peak from IR to hard X-rayallowing us: to understand the nature and the energetic of these objects, toanswer long-standing questions on the blazar sequence and to use them as probes of the EBL.
Publications	Contemporaneous Broadband Observations of Three High-redshift BL LAC Objects \|Ackermann, M., Ajello, M., et al. \| ApJ \| 820-72 \| 2016 \| 2016ApJ...820...72A \| http://ui.adsabs.harvard.edu/#abs/2016ApJ...820...72A The Million Optical - Radio/X-ray Associations (MORX) Catalogue \|Flesch, Eric W., \| PASA \| 33-52 \| 2016 \| 2016PASA...33...52F \| http://ui.adsabs.harvard.edu/#abs/2016PASA...33...52F Classification of 4XMM-DR9 sources by machine learning \|Zhang, Yanxia, Zhao, Yongheng, \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z Hadronic Processes at Work in 5BZB J0630-2406 \|Fichet de Clairfontaine, Ga\\u00ebtan, Buson, Sara, et al. \| ApJ \| 958-2 \| 2023 \| 2023ApJ...958L...2F \| http://ui.adsabs.harvard.edu/#abs/2023ApJ...958L...2F The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII, O VIII, and Fe L-shell Transitions \|Pan, Zeyang, Qu, Zhijie, et al. \| ApJS \| 271-62 \| 2024 \| 2024ApJS..271...62P \| http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources \|Rodriguez, Antonio C., \| PASP \| 136-054201 \| 2024 \| 2024PASP..136e4201R \| http://ui.adsabs.harvard.edu/#abs/2024PASP..136e4201R Robust constraints on feebly interacting particles using XMM-Newton \|Luque, Pedro De la Torre, Balaji, Shyam, \| PhRvD \| 109-L101305 \| 2024 \| 2024PhRvD.109j1305L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L Multimessenger search for electrophilic feebly interacting particles from supernovae \|Luque, Pedro De la Torre, Balaji, Shyam, \| PhRvD \| 109-103028 \| 2024 \| 2024PhRvD.109j3028L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints \|De la Torre Luque, Pedro, Balaji, Shyam, \| ApJ \| 968-46 \| 2024 \| 2024ApJ...968...46D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D
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 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	2016-01-27T23:00:00Z
Keywords	"hard xray", "relevant population", "synchrotron peak", "XMM", "bl lacs", "powerful accelerators", "XMM-Newton", "blazar sequence", "luminous bl lacs", "xmm newton", "bl lac objects"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Marco Ajello, 2016, 'BL Lac Objects at the highest redshifts', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ud46kdn