We give an overview of the science objectives and mission design of the “Spectroscopic Time-Resolving Observatory for Broadband Energy X-rays” observatory, which has been proposed as a NASA probe-class (∼$1.5B) mission in response to the Astro2020 recommendation for an X-ray probe.
The Spectroscopic Time-Resolving Observatory for Broadband X-rays (STROBE-X) is a proposed NASA Astrophysics Probe-class mission. STROBE-X is a time domain and multi-messenger mission designed to provide an unparalleled laboratory for probing strong gravity and the behavior of matter in extreme environments. The instrument suite encompasses a wide-field monitor and two pointed instruments to provide transient discovery and the capability for rapid follow-up with broadband (0.2–30 keV), high time resolution spectroscopy. Over 10,000 pointed observations will be conducted each year and STROBE-X will be able to slew to targets within minutes in response to transients triggered by on-board or ground alerts. Here, we present an overview of the STROBE-X science drivers, mission design, and instrument complement.
The Compact Doppler Magnetograph (CDM) is a space-qualified, miniaturized Doppler magnetograph, tailored to the requirements of a solar polar mission, and designed to provide photospheric line-of-sight magnetic field and Doppler velocity measurements of the solar surface. CDM is derived from the proven GONG (Global Oscillations Network Group) instrument design (Harvey et al., 1988, 1996), with a space qualified prototype developed for the Solaris solar polar MIDEX mission (Hassler et al., 2020). CDM has roughly 1/3 the mass of current state-of-the-art Doppler magnetographs (e.g., SOHO/MDI, SDO/HMI, SolO/PHI), with greatly increased sensitivity to the magnetic field (B) and Doppler velocity (v) and the capability to perform over an expanded spacecraft orbital velocity range, which is required to fit within the mission design constraints of currently feasible high latitude solar polar missions.
The ISCEA observatory is a small satellite with a mass of under 150kg. SwRI’s ISCEA near-infrared (NIR) spectrograph instrument (ISpec) with parallel imaging and multi-object spectroscopy channels is designed to meet the ISCEA observatory science goal: to determine the history of star formation and its quenching in galaxies as a function of local density and stellar mass when the Universe was 3-5 Gyrs old (1.2<z<2.1). To achieve this, the ISpec instrument requirements are wavelength range 1.1 to 2-micron; a spectral resolving power of < 1000; <300 simultaneous object spectral acquisition; 2.8”× 2.8” “slit” size; emission line flux limit (5-sigma) of 3×10-17 erg/s/cm2; field of view of <= 0.27 deg2; and throughput <= 0.2.
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