|Title||Determining the nature of the unassociated Fermi-LAT gamma-ray sources|
|Author||Dr Roberto Mignani|
|Description||Fermi opened new horizons in gamma-ray astronomy, with 1873 sources detected by the LAT instrument in the first 2 years. However, <10% of them are identified, mostly as gamma-ray pulsars or Active Galactic Nuclei (AGN), while ~60% are only associated with potential gamma-ray emitters matched in object catalogues. The remaining ~30% have not even a potential association. The nature of these sources is unknown and can only be investigated through multi-wavelength observations. Here, we propose to map the error boxes of selected LAT sources with XMM and the VLT. From the classification of their candidate X-ray counterparts, based on their X-ray and optical properties, we will then single out those which are most likely gamma-ray emitters and close the identification loop.|
|Publication||Radio-quiet and Radio-loud Pulsars: Similar in Gamma-Rays but Different in X-Rays . Marelli, M., Mignani, R. P., et all. . ApJ . 802-78 . 2015 . 2015ApJ...802...78M ,
The soft gamma-ray pulsar population: a high-energy overview . Kuiper, L., Hermsen, W., . MNRAS . 449-3827 . 2015 . 2015MNRAS.449.3827K ,
A Likely Millisecond Pulsar Binary Counterpart for Fermi Source 2FGL J2039.6-5620 . Romani, Roger W., . ApJ . 812-24 . 2015 . 2015ApJ...812L..24R ,
Multi-wavelength Observations of 3FGL J2039.6--5618: A Candidate Redback Millisecond Pulsar . Salvetti, D., Mignani, R. P., et all. . ApJ . 814-88 . 2015 . 2015ApJ...814...88S ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
A multiwavelength investigation of candidate millisecond pulsars in unassociated gamma-ray sources . Salvetti, D., Mignani, R. P., et all. . MNRAS . 470-466 . 2017 . 2017MNRAS.470..466S ,
Spectral characterization of the non-thermal X-ray emission of gamma-ray pulsars . Coti Zelati, Francesco, Torres, Diego F., et all. . MNRAS . 492-1025 . 2020 . 2020MNRAS.492.1025C ,
A multiwavelength search for black widow and redback counterparts of candidate u03b3-ray millisecond pulsars . Braglia, C., Mignani, R. P., et all. . MNRAS . 497-5364 . 2020 . 2020MNRAS.497.5364B ,
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2014-10-26T00:00:00Z, 072075, 17.56_20190403_1200. https://doi.org/10.5270/esa-nu1d6p4|