| Authors |
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| Publication date |
2009
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| Journal |
The astronomer's telegram
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| Volume | Issue number |
2209
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| Organisations |
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Faculty of Science (FNWI) - Anton Pannekoek Institute for Astronomy (API)
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| Abstract |
We observed SGR 0418+4729 with XRT in PC mode on 2009 September 20-22 (for a total of about 17ks of effective exposure time). By merging these dataset with those already obtained by RXTE and Swift since June 2009, we were able to infer a phase-coherent timing solution also including a first period derivative component (see ATel #2151 and #2152 for previous upper limits on it). According to our preliminary analysis the period and first period derivative of SGR 0418+4729 are: P=9.0783876(3)s and Pdot= 3.0(9) x 10^-13 s/s (1 sigma uncertainties; epoch 54993.0 MJD).
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| Document type |
Article
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| Note |
Evidence for the first period derivative of SGR 0418+4729
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| Language |
English
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| Published at |
http://www.astronomerstelegram.org/?read=2209
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