HAL : in2p3-00664205, version 1
 The Astrophysical Journal 744 (2012) 33
 Pulsed Gamma Rays from the Original Millisecond and Black Widow Pulsars: a case for Caustic Radio Emission?
 (2012)
 We report the detection of pulsed gamma-ray emission from the fast millisecond pulsars (MSPs) B1937+21 (also known as J1939+2134) and B1957+20 (J1959+2048) using 18 months of survey data recorded by the \emph{Fermi} Large Area Telescope (LAT) and timing solutions based on radio observations conducted at the Westerbork and Nançay radio telescopes. In addition, we analyzed archival \emph{RXTE} and \emph{XMM-Newton} X-ray data for the two MSPs, confirming the X-ray emission properties of PSR B1937+21 and finding evidence ($\sim 4\sigma$) for pulsed emission from PSR B1957+20 for the first time. In both cases the gamma-ray emission profile is characterized by two peaks separated by half a rotation and are in close alignment with components observed in radio and X-rays. These two pulsars join PSRs J0034-0534 and J2214+3000 to form an emerging class of gamma-ray MSPs with phase-aligned peaks in different energy bands. The modeling of the radio and gamma-ray emission profiles suggests co-located emission regions in the outer magnetosphere.
 équipe(s) de recherche : GLAST
 Thème(s) : Physique/Astrophysique/Phénomènes cosmiques de haute energiePlanète et Univers/Astrophysique/Phénomènes cosmiques de haute energie
 Mot(s)-clé(s) : gamma rays: general - pulsars: general - pulsars: individual (PSR B1937+21 – PSR B1957+20) - radiation mechanisms: non-thermal
 in2p3-00664205, version 1 http://hal.in2p3.fr/in2p3-00664205 oai:hal.in2p3.fr:in2p3-00664205 Contributeur : Nathalie Martin <> Déposé pour le compte de : David SMITH <> Soumis le : Lundi 30 Janvier 2012, 09:46:36 Dernière modification le : Lundi 30 Janvier 2012, 13:31:31