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dc.contributor.authorKulebi, B.
dc.contributor.authorBALMAN, Şölen
dc.date.accessioned2021-03-03T18:09:51Z
dc.date.available2021-03-03T18:09:51Z
dc.date.issued2009
dc.identifier.citationKulebi B., BALMAN Ş., "The broad-band noise characteristics of selected anomalous X-ray pulsars and soft gamma-ray repeaters", MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, cilt.395, sa.4, ss.2356-2362, 2009
dc.identifier.issn0035-8711
dc.identifier.otherav_4d93976a-32c2-4678-ac94-e111f93eac6c
dc.identifier.othervv_1032021
dc.identifier.urihttp://hdl.handle.net/20.500.12627/55450
dc.identifier.urihttps://doi.org/10.1111/j.1365-2966.2009.14712.x
dc.description.abstractWe present the broad-band noise structure of selected anomalous X-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs) in the 2-60 keV energy band. We have analysed Rossi X-Ray Timing Explorer Proportional Counter Array archival light curves for four AXPs and one SGR. We detect that the persistent emission of these sources shows band-limited noise at low frequencies in the range 0.005-0.05 Hz varying from 2.5 to 70 per cent integrated rms in times of prolonged quiescence and following outbursts. We discovered band-limited red noise in 1E 2259+586 only for similar to 2 yr after its major 2002 outburst. The system shows no broad-band noise otherwise. Although this rise in noise in 1E 2259+586 occurred following an outburst which included a rotational glitch, the other glitching AXPs showed no obvious change in broad-band noise, thus it does not seem that this noise is correlated with glitches. The only source that showed significant variation in broad-band noise was 1E 1048.1-5937, where the noise gradually rose for 1.95 yr at a rate of similar to 3.6 per cent per year. For this source the increases in broad-band noise was not correlated with the large increases in persistent and pulsed flux, or its two short SGR-like bursts. This rise in noise did commence after a long burst, however, given the sparsity of this event, and the possibility that similar bursts went unnoticed the trigger for the rise is noise in 1E 1048.1-5937 is not as clear as for 1E 2259+586. The other three sources indicate a persistent band-limited noise at low levels in comparison.
dc.language.isoeng
dc.subjectTemel Bilimler (SCI)
dc.subjectAstronomi ve Astrofizik
dc.subjectASTRONOMİ VE ASTROFİZİK
dc.subjectUzay bilimi
dc.subjectFizik
dc.subjectTemel Bilimler
dc.titleThe broad-band noise characteristics of selected anomalous X-ray pulsars and soft gamma-ray repeaters
dc.typeMakale
dc.relation.journalMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
dc.contributor.departmentOrta Doğu Teknik Üniversitesi , ,
dc.identifier.volume395
dc.identifier.issue4
dc.identifier.startpage2356
dc.identifier.endpage2362
dc.contributor.firstauthorID2212584


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