Using gamma-ray data collected by the Astro-rivelatore Gamma ad Immagini LEggero (AGILE) satellite over a period of almost one year (from 2007 July to 2008 June), we searched for pulsed signals from 35 potentially interesting radio pulsars, ordered according to F_{γ}∝ √{\dot{E}} d^{-2} and for which contemporary or recent radio data were available. AGILE detected three new top-ranking nearby and Vela-like pulsars with good confidence both through timing and spatial analysis. Among the newcomers we find pulsars with very high rotational energy losses, such as the remarkable PSR B1509 - 58 with a magnetic field in excess of 1013 Gauss, and PSR J2229 + 6114 providing a reliable identification for the previously unidentified EGRET source 3EG 2227 + 6122. Moreover, the powerful millisecond pulsar B1821 - 24, in the globular cluster M28, is detected during a fraction of the observations. Four other promising gamma-ray pulsar candidates, among which is the notable J2043 + 2740 with an age in excess of 1 million years, show a possible detection in the timing analysis only and deserve confirmation.
Discovery of New Gamma-Ray Pulsars with AGILE / Pellizzoni A; Pilia M; Possenti A; Chen A; Giuliani A; Trois A; Caraveo P; Del Monte E; Fornari F; Fuschino F; Mereghetti S; Tavani M; Argan A; Burgay M; Cognard I; Corongiu A; Costa E; D'Amico N; De Luca A; Esposito P; Evangelista Y; Feroci M; Johnston S; Kramer M; Longo F; Marisaldi M; Theureau G; Weltevrede P; Barbiellini G; Boffelli F; Bulgarelli A; Cattaneo P W; Cocco V; DAmmando F; DeParis G; Di Cocco G; Donnarumma I; Fiorini M; Froysland T; Galli M; Gianotti F; Labanti C; Lapshov; I.; Lazzarotto; F.; Lipari P; Mineo T; Morselli A; Pacciani L; Perotti F; Piano G; Picozza P; Prest M; Pucella G; Rapisarda M; Rappoldi A; Sabatini S; Soffitta P; Trifoglio M; Vallazza E; Vercellone S; Vittorini V; Zambra A; Zanello D; Pittori C; Verrecchia F; Preger B; Santolamazza P; Giommi P; Salotti L; Bignami G F. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - STAMPA. - 695:1(2009), pp. 115-119. [10.1088/0004-637X/695/1/L115]
Discovery of New Gamma-Ray Pulsars with AGILE
D'AMMANDO, FILIPPO;
2009
Abstract
Using gamma-ray data collected by the Astro-rivelatore Gamma ad Immagini LEggero (AGILE) satellite over a period of almost one year (from 2007 July to 2008 June), we searched for pulsed signals from 35 potentially interesting radio pulsars, ordered according to F_{γ}∝ √{\dot{E}} d^{-2} and for which contemporary or recent radio data were available. AGILE detected three new top-ranking nearby and Vela-like pulsars with good confidence both through timing and spatial analysis. Among the newcomers we find pulsars with very high rotational energy losses, such as the remarkable PSR B1509 - 58 with a magnetic field in excess of 1013 Gauss, and PSR J2229 + 6114 providing a reliable identification for the previously unidentified EGRET source 3EG 2227 + 6122. Moreover, the powerful millisecond pulsar B1821 - 24, in the globular cluster M28, is detected during a fraction of the observations. Four other promising gamma-ray pulsar candidates, among which is the notable J2043 + 2740 with an age in excess of 1 million years, show a possible detection in the timing analysis only and deserve confirmation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
