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SUMMARY:NICER Spectral-Timing Constraints on the Nature of IGR J17285−29
 22
DTSTART;VALUE=DATE-TIME:20261027T162500Z
DTEND;VALUE=DATE-TIME:20261027T163000Z
DTSTAMP;VALUE=DATE-TIME:20261023T152652Z
UID:indico-contribution-6480@cern.ch
DESCRIPTION:Speakers: Dervis Ersin Tokbay (Department of Astronomy and Spa
 ce Sciences\, Faculty of Science\, Erciyes University)\nIGR J17285−2922 
 is a very faint transient low-mass X-ray binary whose compact object has n
 ot yet been securely identified. Its consistently hard X-ray spectra durin
 g detected outbursts and its multiwavelength behaviour favour a black hole
  interpretation\, although a neutron star primary has not been excluded. W
 e investigate the nature of the compact object using two archival NICER ob
 servations obtained during the 2019 outburst that were not included in pre
 vious studies\, providing a total cleaned exposure of approximately 3 ks. 
 Our analysis combines X-ray spectroscopy with high-time-resolution variabi
 lity diagnostics. The NICER energy spectra are compared with quasi-simulta
 neous Swift/XRT measurements to characterize the X-ray flux and spectral s
 tate of the source. Energy-resolved power-density spectra\, broad-band fra
 ctional variability\, and searches for coherent pulsations and quasi-perio
 dic oscillations are used to investigate compact-object-sensitive timing s
 ignatures. Particular attention is given to high-frequency variability and
  possible thermal emission consistent with a neutron-star surface or bound
 ary layer. Together\, these independent spectral and timing diagnostics pr
 ovide a new test of the black hole and neutron star interpretations of IGR
  J17285−2922 and help refine the classification of this very faint X-ray
  binary.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6480/
LOCATION:Sevastopol hotel Conference Hall 1
URL:https://indico.particle.mephi.ru/event/626/contributions/6480/
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