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Back to radio: Parkes detection of radio pulses from the transient AXP 1E1547.0-5408

ATEL # 1913; M. Burgay (INAF-AOC), G.L. Israel (INAF-OAR), A. Possenti (INAF-AOC),N. Rea (U. Amsterdam), P. Esposito, S. Mereghetti, A. Tiengo, (INAF-IASF, MI), D. Gotz (CEA-Saclay)
on 27 Jan 2009; 14:44 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: Nanda Rea (

Subjects: Radio, Request for Observations, Neutron Stars, Pulsars, Soft Gamma-ray Repeaters, Transients

Following the recent re-activation of the AXP 1E1547.0-5408 (GCNs #8833, #8835, #8837) we triggered our Parkes target of opportunity program for transient magnetars. We observed 1E1547.0-5408 at 10cm on 2009 January 23rd and 25th, for ~1.2hrs per day.

Radio pulsations were not detected in our first observation on January 23rd (no detection resulted also from the data taken on January 22nd: Atel #1907).

We clearly detect radio pulsations from the AXP 1E1547.0-5408 on January 25th starting at 16:48 (UT), at a period of P=2.07210(2)s. This period is in agreement with the one measured from simultaneous X-ray observations.

We acknowledge J. Reynolds, P. Edwards and I. Stairs for their support during these observations.

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R. E. Rutledge , Editor
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