摘要
On the basis of the properties of known γ-ray millisecond pulsars（MSPs）, we have selected 77un-associated sources from the Fermi Large Area Telescope（LAT） third source catalog for the purpose of finding likely candidate MSPs. Previously, detailed LAT data analysis for 39 of them was reported,and here we report the analysis for the remaining 38 sources. We identify that among the 38 sources, 28 of them are single point-like sources with clean background and their spectra show significant curvature.We also conduct an analysis of archival X-ray data available for 24 of the 28 sources. In the fields of10 sources, there is at least one X-ray object, and in those of the other 14 sources, no X-ray object is detected but this is probably due to the X-ray observations being short. We discuss the possible MSP nature for these sources. Six of them（J0514.6-4406, J1035.7-6720, J1624.2-4041, J1744.1-7619,J1946.4-5403 and J2039.6-5618） are most likely associated with pulsars because of multi-wavelength identifications including direct radio or γ-ray detection of pulsations. To firmly establish the associations or verify the MSP nature for other sources, deep X-ray and/or optical observations are needed.
On the basis of the properties of known γ-ray millisecond pulsars（MSPs）, we have selected 77un-associated sources from the Fermi Large Area Telescope（LAT） third source catalog for the purpose of finding likely candidate MSPs. Previously, detailed LAT data analysis for 39 of them was reported,and here we report the analysis for the remaining 38 sources. We identify that among the 38 sources, 28 of them are single point-like sources with clean background and their spectra show significant curvature.We also conduct an analysis of archival X-ray data available for 24 of the 28 sources. In the fields of10 sources, there is at least one X-ray object, and in those of the other 14 sources, no X-ray object is detected but this is probably due to the X-ray observations being short. We discuss the possible MSP nature for these sources. Six of them（J0514.6-4406, J1035.7-6720, J1624.2-4041, J1744.1-7619,J1946.4-5403 and J2039.6-5618） are most likely associated with pulsars because of multi-wavelength identifications including direct radio or γ-ray detection of pulsations. To firmly establish the associations or verify the MSP nature for other sources, deep X-ray and/or optical observations are needed.
基金
supported by the National Program on Key Research and Development Project (Grant No. 2016YFA0400804)
the Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences (Grant No. XDB09000000)
the National Natural Science Foundation of China (11373055 and 11633007)
the support by the CAS/SAFEA International Partnership Program for Creative Research Teams
the Chinese Academy of Sciences President’s International Fellowship Initiative (CAS PIFI, Grant No. 2015PM059)
the Shanghai Natural Science Foundation for Youth (13ZR1464400)
the National Natural Science Foundation of China for Youth (11403075)
