Lynx X-Ray Observatory: an overview

Gaskin, Jessica A.; Swartz, Douglas A.; Vikhlinin, A.; Özel, Feryal; Gelmis, Karen; Arenberg, Jonathan W.; Bandler, S. R.; Bautz, M. W.; Civitani, M.; Dominguez, Alexandra; Eckart, Megan E.; Falcone, A.; Figueroa‐Feliciano, E.; Freeman, Mark D.; Günther, Hans Moritz; Havey, Keith; Heilmann, Ralf K.; Kilaru, Kiranmayee; Kraft, Ralph; McCarley, Kevin S.; McEntaffer, Randall L.; Pareschi, G.; Purcell, W. R.; Reid, Paul B.; Schattenburg, Mark L.; Schwartz, D. A.; Schwartz, Eric D.; Tananbaum, H.; Tremblay, G. R.; Zhang, William W.; ZuHone, John

doi:10.1117/1.jatis.5.2.021001

Cited by 124 publications

(100 citation statements)

References 47 publications

(64 reference statements)

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“…erate X-ray emission and future deep X-ray surveys (e.g. from the proposed Lynx X-ray Observatory (Gaskin et al 2019)) are also likely to provide additional constraints on the population of black-hole seeds at z 15. By studying the 21 cm global signal arising in a handful of illustrative scenarios, we have arrived at the following con-clusions on the signatures of radio-loud black-holes during the Cosmic Dawn.…”

Section: Discussionmentioning

confidence: 99%

The Radio Scream from black holes at Cosmic Dawn: a semi-analytic model for the impact of radio-loud black holes on the 21 cm global signal

Ewall‐Wice

Chang

Lazio

2019

Monthly Notices of the Royal Astronomical Society

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We use a semi-analytic model to explore the potential impact of a brief and violent period of radio-loud accretion on to black holes (The Radio Scream) during the Cosmic Dawn on the H i hyperfine 21 cm signal. We find that radio emission from supermassive black hole seeds can impact the global 21 cm signal at the level of tens to hundreds of per cent provided that they were as radio loud as $z$ ≈ 1 black holes and obscured by gas with column depths of NH ≳ 1023 cm−2. We determine plausible sets of parameters that reproduce some of the striking features of the EDGES absorption feature including its depth, timing, and side steepness while producing radio/X-ray backgrounds and source counts that are consistent with published limits. Scenarios yielding a dramatic 21 cm signature also predict large populations of ∼$\mu$Jy point sources that will be detectable in future deep surveys from the Square Kilometer Array (SKA). Thus, 21 cm measurements, complemented by deep point-source surveys, have the potential to constrain optimistic scenarios where supermassive black hole progenitors were radio loud.

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Section: Discussionmentioning

confidence: 99%

The Radio Scream from black holes at Cosmic Dawn: a semi-analytic model for the impact of radio-loud black holes on the 21 cm global signal

Ewall‐Wice

Chang

Lazio

2019

Monthly Notices of the Royal Astronomical Society

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“…Journal of Astronomical Telescopes, Instruments, and Systems 021018-10 Apr-Jun 2019 • Vol. 5 (2) collaboration on past hybrid CMOS developments, as well as for contributions to the operation and design of the small-pixel HCDs.…”

Section: Resultsmentioning

confidence: 99%

Hybrid CMOS detectors for the Lynx x-ray surveyor high definition x-ray imager

Hull

Falcone

Bray

et al. 2019

J. Astron. Telesc. Instrum. Syst.

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X-ray hybrid CMOS detectors (HCDs) are a promising candidate for future x-ray missions requiring high throughput and fine angular resolution along with large field-of-view, such as the high-definition x-ray imager (HDXI) instrument on the Lynx x-ray surveyor mission concept. These devices offer fast readout capability, low power consumption, and radiation hardness while maintaining high detection efficiency from 0.2 to 10 keV. In addition, x-ray hybrid CMOS sensors may be fabricated with small pixel sizes to accommodate high-resolution optics and have shown great improvements in recent years in noise and spectral resolution performance. In particular, 12.5-μm pitch prototype devices that include in-pixel correlated double sampling capability and crosstalk eliminating capacitive transimpedance amplifiers, have been fabricated and tested. These detectors have achieved read noise as low as 5.4 e − , and we measure the best energy resolution to be 148 eV (2.5%) at 5.9 keV and 78 eV (14.9%) at 0.53 keV. We will describe the characterization of these prototype small-pixel x-ray HCDs, and we will discuss their applicability to the HDXI instrument on Lynx. © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…Beyond validating the GEANT4 simulations for the Athena WFI, this study also lays the ground work for application of self-anticoincidence to reduce the unfocused background in silicon-based X-ray detectors, e.g. WFI on board of Athena (Nandra et al 2013), eROSITA on board of SRG (Merloni et al 2012), EPIC on board of XMM-Newton (Jansen et al 2001), and HDXI on board of Lynx (Gaskin et al 2019). The results obtained from this work will be used to develop both on-board and ground-based algorithms to better characterize and improve background rejection for siliconbased X-ray imaging detectors.…”

Section: Valid Events (Counts)mentioning

confidence: 93%

Characterization of the Particle-induced Background of XMM-Newton EPIC-pn: Short- and Long-term Variability

Bulbul

Kraft

Nulsen

et al. 2020

ApJ

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The particle-induced instrumental background of X-ray observatories is dominated by the highly energetic Galactic Cosmic Ray (GCR) primary protons, electrons, and He ions depositing some of their energy as they pass through the detector. The interactions of these primary particles with the detector housing produce secondary particles that mimic X-ray events from celestial sources and constitute the particle-induced background. We investigate the short and long-term properties of the unfocused particle background of the XMM-Newton EPIC-pn camera taken in the small window mode (SWM), with the filter wheel closed. We then compare the results with the SWM observations of astrophysical sources taken through the thick and thin filters. The long term variability of particle-induced background shows strong modulation with the solar cycle, indicating that this background is mostly dominated by GCRs. We find that valid events within a 30 pixel radius of the particle events are highly correlated with these GCR particle primaries. The spectral properties and branching ratios of valid events show some variation, depending on their origin, i.e., particle-induced or astrophysical sources. These results can be used to characterize and reduce the non-X-ray background in XMM-Newton and future silicon-based X-ray detectors.

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Lynx X-Ray Observatory: an overview

Cited by 124 publications

References 47 publications

The Radio Scream from black holes at Cosmic Dawn: a semi-analytic model for the impact of radio-loud black holes on the 21 cm global signal

The Radio Scream from black holes at Cosmic Dawn: a semi-analytic model for the impact of radio-loud black holes on the 21 cm global signal

Hybrid CMOS detectors for the Lynx x-ray surveyor high definition x-ray imager

Characterization of the Particle-induced Background of XMM-Newton EPIC-pn: Short- and Long-term Variability

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