STROBE-X: X-ray Timing & Spectroscopy on Dynamical Timescales from Microseconds to Years

C.~A. Wilson-Hodge, P. S. Ray, T. J. Maccarone, D. Chakrabarty, K. C. Gendreau, Z. Arzoumanian, P. Jenke, D. Ballantyne, E. Bozzo, Søren Brandt, L. Brenneman, M. Christophersen, A. DeRosa, M. Feroci, A. Goldstein, D. Hartmann, M. Hernanz, M. McDonald, B. Phlips, R. RemillardA. Stevens, J. Tomsick, A. Watts, K. S. Wood, S. Zane

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Abstract

We describe a probe-class mission concept that provides an unprecedentedview of the X-ray sky, performing timing and 0.2-30 keV spectroscopy overtimescales from microseconds to years. The Spectroscopic Time-Resolving Observatory for Broadband Energy X-rays (STROBE-X) comprises three primary instruments. The first uses an array of lightweight optics (3-m focallength) that concentrate incident photons onto solid state detectors with CCD-level (85-130 eV) energy resolution, 100 ns time resolution, and low background rates to cover the 0.2-12 keV band. This technology is scaled upfrom NICER, with enhanced optics to take advantage of the longer focal length of STROBE-X. The second uses large-area collimated silicon drift detectors, developed for ESA's LOFT, to cover the 2-30 keV band. These two instruments each provide an order of magnitude improvement ineffective area compared with its predecessor (NICER and RXTE, respectively). Finally, a sensitive sky monitor triggers pointed observations, provides high duty cycle, high time resolution, high spectral resolution monitoring of the X-ray sky with ~20 times the sensitivity of the RXTE ASM,and enables multi-wavelength and multi-messenger studies on a continuous,rather than scanning basis. We include updated instrument designs resulting from the GSFC IDL run in November 2017.For the first time, the broad coverage provides simultaneous study of thermal components, non-thermal components, iron lines, and reflection features from a single platform for accreting black holes at all scales. The enormous collecting area allows detailed studies of the dense matter equation of state using both thermal emission from rotation-powered pulsars and harder emission from X-rayburst oscillations. The combination of the wide-field monitor and the sensitive pointed instruments enables observations of potential electromagnetic counterparts to LIGO/Virgo and neutrino events. Extragalactic science, such as constraining bulk metalicity of medium to high redshift clusters and nearby compact groups and unprecedented timing investigations of active galactic nuclei, is also obtained.
Original languageEnglish
Publication date2018
Number of pages2
Publication statusPublished - 2018
Event231st AAS Meeting - The Gaylord National Resort & Convention Center , National Harbor, United States
Duration: 8 Jan 201812 Jan 2018

Conference

Conference231st AAS Meeting
LocationThe Gaylord National Resort & Convention Center
Country/TerritoryUnited States
CityNational Harbor
Period08/01/201812/01/2018

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