Detection of a spin derivative in GRO J1744-28 with Swift/XRT

PINTORE, FABIO;SANNA, ANDREA;Riggio A;BURDERI, LUCIANO;Di Salvo T;D'Ai A;Iaria R;Robba N. R.

2014-01-01

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Abstract

We report a timing solution for the accreting Neutron Star GRO J1744-28, observed during its ongoing outburst (ATel #5790, #5810, #5845, #5858, #5883). We analyzed all the available Swift-XRT observations taken in Window Timing mode, from 2nd to 17th February 2014. These observations have an effective exposure time of ~13 ks. The intervals in which X-ray bursts are clearly detected (Atel #5883) were removed.