Enabling Decadal-level Surveys (High-z GRBs, AGN, Transients) to EXIST

Details Enabling Decadal-level Surveys (High-z GRBs, AGN, Transients) to EXIST Enabling Decadal-level Surveys (High-z GRBs, AGN, Transients) to EXIST

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21460206g&link_type=abstract

American Astronomical Society, AAS Meeting #214, #602.06

Astronomy and Astrophysics

Astrophysics

Scientific paper

The Energetic X-ray Imaging Survey Telescope (EXIST) has completed a Astrophysics Strategic Mission Concept Study (ASMCS) for consideration now by the Astro2010 Decadal Survey as a Medium class mission for the coming decade. EXIST would enable the most sensitive and immediate probes of the physical conditions during the epoch of reionization (EOR) at z 7-15 by its unparalled sensitivity to discover and immediately identify high-z Gamma-ray Bursts (GRBs). With a GRB sensitivity nearly 10X that of Swift, and a proposed onboard optical-IR telescope (IRT) as well as a contributed (Italy) Soft X-ray Imager (SXI), the High Energy Telescope (HET) on EXIST can detect and slew to a <20" position within 150sec. Due to its cold (240K) mirror, the 1.1m IRT can detect AB 24 in 100sec in 4 simultaneous bands between 0.3 - 2.3microns as recorded on 2 HyVISi and 2 H2RG detectors (2K x 2K) and then autonomously identify the GRB from the <2" early-afterglow position from SXI. Spectra (R = 30 vs. 3000) are then obtained simultaneously in all 4 bands for redshift and EOR patchiness studies. Full sky surveys for AGN reaching F(10-40 keV) =4 E-13 cgs will measure the Compton thick and dormant AGN population and accretion luminosity of the Universe as well as open the Transient high energy Universe for prompt IR - X-ray identifications. An overview of the mision science and the HET, IRT and SXI are given along with descriptions of how the mission could serve a vast range of science investigations not yet possible.

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