Discovery of the INTEGRAL x/gamma-ray transient IGR J00291+5934: A Comptonised accreting ms pulsar?

Article Article scientifique Lettre Discovery of the INTEGRAL x/gamma-ray transient IGR J00291+5934: A Comptonised accreting ms pulsar? eng 2005-02-22 author Shaw Simon 134968 author Mowlavi Nami 109031 Département d'astronomie (ASTRO) author Rodriguez Jérôme 629189 author Ubertini P. author Capitanio F. author Ebisawa Ken 134429 author Eckert Dominique 0000-0001-7917-3892 515027 Département d'astronomie (ASTRO) author Courvoisier Thierry 22894 Administration de la faculté des sciences (SIAD) author Produit Nicolas 0000-0001-7138-7677 22959 Département d'astronomie (ASTRO) author Walter Roland 23812 Département d'astronomie (ASTRO) author Falanga M. L13-L16 10.1051/0004-6361:200500011 0004-6361 astro-ph/0501507 http://www.aanda.org/10.1051/0004-6361:200500011 We report the discovery of a high-energy transient with the IBIS/ISGRI detector on board the INTEGRAL observatory. The source, namely IGR J00291+5934, was first detected on 2nd December 2004 in the routine monitoring of the IBIS/ISGRI 20--60 keV images. The observations were conducted during Galactic Plane Scans, which are a key part of the INTEGRAL Core Programme observations. After verifying the basic source behaviour, the discovery was announced on 3rd December. The transient shows a hard Comptonised spectrum, with peak energy release at about 20 keV and a total luminosity of ~ 0.9E36 erg/s in the 5--100 keV range, assuming a distance of 3 kpc. Following the INTEGRAL announcement of the discovery of IGR J00291+5934, a number of observations were made by other instruments. We summarise the results of those observations and, together with the INTEGRAL data, identifiy IGR J00291+5934 as the 6th member of a class of accreting X-ray millisecond pulsars. Gamma-rays: observations Pulsars: individual IGR J00291+5934 Dewey 520 26 Département d'astronomie 12 false Astronomy & astrophysics 432 1 889630af-57c3-44e1-b608-e757c89c97fd Article (Published version) Restricted Article_scientifique_from_crossref.pdf 331728 application/pdf c0cec1a4774982a511d553063a2d957568bdc0c2e973f7b3ac10bfb6a9b80afc 1230703a-2bc8-4b5f-a162-95836a6254ec Article (Accepted version) Public 0501507v1.pdf 122884 application/pdf 58b0a89acd23be955dda16b37d67392ea563eb94b695c8e9e6837391768e3887 openAccess Faculté des sciences / Département d'astronomie

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Discovery of the INTEGRAL x/gamma-ray transient IGR J00291+5934: A Comptonised accreting ms pulsar?	Astronomy & astrophysics			2005	30	45

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Ebisawa, Ken