A search for cyclotron lines in the Bursting Pulsar, GRO J1744-28

Details A search for cyclotron lines in the Bursting Pulsar, GRO J1744-28 A search for cyclotron lines in the Bursting Pulsar, GRO J1744-28

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999nuphs..69..216h&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 69, Issue 1-3, p. 216-219.

Physics

Nuclear Physics

Scientific paper

We report a search for cyclotron line absorption in the pulsed spectrum of the ``Bursting Pulsar'', GRO J1744-28 using the Proportional Counter Array (PCA) and the High Energy X-ray Timing Experiment (HEXTE) on the Rossi X-ray Timing Explorer (RXTE). We focus on data obtained around the peak of the 1996-1997 outburst. Improvements made in these analyses include the use of more accurate PCA and HEXTE detector response matrices, data with a larger overlapping energy band, and a continuum model especially well suited to cyclotron line searches. We find that the spectrum can be adequately fit with a smooth continuum model typical of other X-ray pulsars, with no modification for cyclotron absorption required. In fact, the data are inconsistent with cyclotron features with depths greater than a few percent of the continuum.

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