A dataset provided by the European Space Agency

Proposal ID 069037
Title The mysterious X-ray emission and optical flash of Zeta Lyrae
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0690370101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0690370201

DOI https://doi.org/10.5270/esa-m1oktfs
Principal Investigator, PI Dr Thomas Maccarone
Abstract Zeta Lyrae is a nearby (d=47 pc) bright (V=4.1) star which has shown an strongoptical flash and which shows strong X-ray emission. The system is asingle-lined spectroscopic binary. While ordinarily, these properties could allbe explained by coronal activity from either the primary or the secondary, theprimary here is an A star, and the secondary is both unseen, and has a mass ofat least 0.8 solar masses. The source is not detected in the radio down to about40 microJy (about 20 times below the flux density expected for a stellar massblack hole at this X-ray luminosity). We propose XMM observations to test ideasfor the origin of the X-ray emission and hopefully to explain the optical flashas well.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2012-05-12T05:14:20Z/2012-09-02T07:15:42Z
Version 21.51_20241115_1113
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 2013-09-21T00:00:00Z
Last Update 2026-07-09
Keywords "coronal activity", "flux density", "optical flash", "test ideas", "solar masses", "pc bright", "stellar mass blackhole", "XMM", "xray emission", "zeta lyrae", "xray luminosity"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Thomas Maccarone, 2013, 'The mysterious X-ray emission and optical flash of Zeta Lyrae', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-m1oktfs
Rights Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.