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      The Effects of Instrumental Deadtime on NICER Timing Products

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          Abstract

          The X-ray Timing Instrument as part of the Neutron Star Interior Composition Explorer has the potential to examine the time-domain properties of compact objects in regimes not explored by previous timing instruments, due to its combination of high effective area and timing resolution. We consider the effects of instrumental deadtime at a range of effective countrates in a series of observations of the X-ray binary GX 339-4 to determine what effect deadtime has on photometric and Fourier frequency-domain products. We find that there are no significant inconsistencies across the functional detectors in the instrument, and that in the regimes where instrumental deadtime is a limiting factor on observations that previous approaches to dealing with deadtime, as applied to RXTE and other detectors, are still appropriate, and that performing deadtime corrections to lightcurves before creating Fourier products are not necessary at the count rates considered in our analysis.

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          Author and article information

          Journal
          19 September 2024
          Article
          2409.12574
          908ca01e-55da-417b-895c-ffe5fed0ea07

          http://creativecommons.org/licenses/by/4.0/

          History
          Custom metadata
          14 pages, 11 figures. Accepted for publication by RAS Techniques & Instruments
          astro-ph.IM astro-ph.HE

          Instrumentation & Methods for astrophysics,High energy astrophysical phenomena

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