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-gamma alpha root(E) over dot 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 10(13) 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 / A., Pellizzoni; M., Pilia; A., Possenti; A., Chen; A., Giuliani; A., Trois; P., Caraveo; E. D., Monte; F., Fornari; F., Fuschino; S., Mereghetti; M., Tavani; A., Argan; M., Burgay; I., Cognard; A., Corongiu; E., Costa; N., D'Amico; A. D., Luca; P., Esposito; Y., Evangelista; M., Feroci; S., Johnston; M., Kramer; Longo, Francesco; M., Marisaldi; G., Theureau; P., Weltevrede; G., Barbiellini; F., Boffelli; A., Bulgarelli; P. W., Cattaneo; V., Cocco; F., D'Ammando; G. D., Paris; G. D., Cocco; I., Donnarumma; M., Fiorini; T., Froysland; M., Galli; F., Gianotti; C., Labanti; I., Lapshov; F., Lazzarotto; P., Lipari; T., Mineo; A., Morselli; L., Pacciani; F., Perotti; G., Piano; P., Picozza; M., Prest; G., Pucella; M., Rapisarda; A., Rappoldi; S., Sabatini; P., Soffitta; M., Trifoglio; E., Vallazza; S., Vercellone; V., Vittorini; A., Zambra; D., Zanello; C., Pittori; F., Verrecchia; B., Preger; P., Santolamazza; P., Giommi; L., Salotti; G. F., Bignami. - In: THE ASTROPHYSICAL JOURNAL LETTERS. - ISSN 2041-8205. - STAMPA. - 695:(2009), pp. L115-L119. [10.1088/0004-637X/695/1/L115]
Discovery Of New Gamma-Ray Pulsars With Agile
LONGO, FRANCESCO;
2009-01-01
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-gamma alpha root(E) over dot 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 10(13) 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.Pubblicazioni consigliate
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