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.
AGILE Detection of Delayed Gamma-ray Emission From the Short Gamma-Ray Burst GRB 090510 / Giuliani A; Fuschino F; Vianello G; Marisaldi M; Mereghetti S; Tavani M; Cutini S; Barbiellini G; Longo F; Moretti E; Feroci M; Del Monte E; Argan A; Bulgarelli A; Caraveo P; Cattaneo P W; Chen A W; Contessi T; DAmmando F; Costa E; De Paris G; Di Cocco G; Donnarumma I; Evangelista Y; Ferrari A; Fiorini M; Galli M; Gianotti F; Labanti C; Lapshov I; Lazzarotto F; Lipari P; Morselli A; Pacciani L; Pellizzoni A; Perotti F; Piano G; Picozza P; Pilia M; Pucella G; Prest M; Rapisarda M; Rappoldi A; Rubini A; Sabatini S; Scalise E; Striani E; Soffitta P; Trifoglio M; Trois A; Vallazza E; Vercellone S; Vittorini V; Zambra A; Zanello D; Pittori C; Verrecchia F; Santolamazza P; Giommi P; Colafrancesco S; Antonelli L A; Salotti L. - In: THE ASTROPHYSICAL JOURNAL LETTERS. - ISSN 2041-8205. - STAMPA. - 708:2(2010), pp. 84-88. [10.1088/2041-8205/708/2/L84]
AGILE Detection of Delayed Gamma-ray Emission From the Short Gamma-Ray Burst GRB 090510
D'AMMANDO, FILIPPO;
2010
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.
