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Updating the orbital ephemeris of the dipping source XB 1254-690 and the distance to the source
Pintore, Fabio; Sanna, Andrea; Gambino, Angelo F. +5 more
XB 1254-690 is a dipping low mass X-ray binary system hosting a neutron star and showing type I X-ray bursts. We aim at obtaining a more accurate orbital ephemeris and at constraining the orbital period derivative of the system for the first time. In addition, we want to better constrain the distance to the source in order to locate the system in …
Identification of candidate millisecond pulsars from Fermi LAT observations II
Wang, Zhong-Xiang; Xing, Yi; Vadakkumthani, Jithesh +1 more
On the basis of the properties of known γ-ray millisecond pulsars (MSPs), we have selected 77 un-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…