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Optical observations of IGR J00291+5934 in the post outburst phase

Published online by Cambridge University Press:  12 May 2006

M. T. Reynolds
Affiliation:
Department of Physics, University College Cork, Ireland email: m.reynolds@ucc.ie
P. Elebert
Affiliation:
Department of Physics, University College Cork, Ireland email: m.reynolds@ucc.ie
P. J. Callanan
Affiliation:
Department of Physics, University College Cork, Ireland email: m.reynolds@ucc.ie
B. Field
Affiliation:
Department of Physics, University College Cork, Ireland email: m.reynolds@ucc.ie
P. Tuite
Affiliation:
Department of Physics, University College Cork, Ireland email: m.reynolds@ucc.ie
M. A. P Torres
Affiliation:
Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
D. Steeghs
Affiliation:
Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
P. M. Garnavich
Affiliation:
Department of Physics, University of Notre Dame, Notre Dame, IN 46556-5670, USA
D. M. Terndrup
Affiliation:
Department of Astronomy, The Ohio State University, Columbus, OH 43210, USA
A. V. Filippenko
Affiliation:
Astronomy Department, University of California, Berkeley, California 94720, USA
R. J. Foley
Affiliation:
Astronomy Department, University of California, Berkeley, California 94720, USA
E. T. Harlaftis
Affiliation:
National Observatory of Athens, PO Box 20048, Athens 11810, Greece
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Abstract

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We present optical observations of the newly discovered accretion powered millisecond pulsar IGR J00291+5934, undertaken in the weeks following its outburst on 2$^{nd}$ December 2004. The decay to quiescence is seen to be highly variable with no indication of a modulation on the $\sim$2.46 hr orbital period apparent in the data, consistent with a system at low inclination. We also have a single Keck LRIS spectrum of the companion to IGR J00291+5934 taken 10 days after outburst. Strong hydrogen and helium emission lines are observed confirming the identity of the counterpart.

Type
Contributed Papers
Copyright
2006 International Astronomical Union