A dataset provided by the European Space Agency

Name: DETERMINING THE NATURE OF THE BRIGHTEST SERENDIPITOUS NUSTAR SOURCE
Published: 2017-12-12T23:00:00Z

Proposal ID	079062
Title	DETERMINING THE NATURE OF THE BRIGHTEST SERENDIPITOUS NUSTAR SOURCE
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0790620101
DOI	https://doi.org/10.5270/esa-ze042ws
Principal Investigator, PI	Dr John Tomsick
Abstract	In our systematic search for serendipitous sources (serendips) in the NuSTARdata, we have found a very bright (7.5 mCrab in the 2-10 keV band) serendip(J0923 s1) near the edge of one of the NuSTAR fields of view. The source hasbeen previously detected in the soft X-ray band, but its nature is unknown.Based on its X-ray spectrum, its optical counterpart, and its long-termvariability (as seen by MAXI), it must be Galactic, and, while some of itsproperties are suggestive of a magnetic Cataclysmic Variable, other propertiescause problems with this interpretation. One interesting possibility is that itmay be an accreting black hole with a high temperature disk. We propose NuSTARand XMM-Newton observations to determine the nature of J0923 s1.
Publications	Galactic Sources Detected in the NuSTAR Serendipitous Survey \|Tomsick, John A., Lansbury, George B., et al. \| ApJS \| 230-25 \| 2017 \| 2017ApJS..230...25T \| http://ui.adsabs.harvard.edu/#abs/2017ApJS..230...25T 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 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	2016-11-24T13:00:00Z/2016-11-24T19:23:20Z
Version	19.17_20220121_1250
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	2017-12-12T23:00:00Z
Keywords	"NuSTAR", "optical counterpart", "sources serendips", "term variability", "XMM", "magnetic cataclysmic variable", "xray spectrum", "nustar data", "nustar source", "accreting blackhole", "j0923 s1", "XMM-Newton", "temperature disk", "nustar fields", "soft xray band", "xmm newton", "systematic search"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr John Tomsick, 2017, 'DETERMINING THE NATURE OF THE BRIGHTEST SERENDIPITOUS NUSTAR SOURCE', 19.17_20220121_1250, European Space Agency, https://doi.org/10.5270/esa-ze042ws