The Faint Intergalactic Redshifted Emission Balloon-2: End-to-end ground Calibration (Conference Presentation)

Picouet, Vincent; Milliard, B.; Vibert, D.; Grange, Robert; Martin, Christopher; Hamden, Erika; Kyne, Gillian; Schiminovich, David; Augustin, Ramona; Melso, Nicole; Gross, Julia; Quiret, Samuel

doi:10.1117/12.2313324

Cited by 2 publications

(3 citation statements)

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“…Balloon-2; PI: ChrisMartin;Milliard et al 2010;Picouet et al 2018) is a balloon-borne experiment aiming at observing the faint diffuse UV emission from the CGM of intermediate redshift (0.3-1.0) galaxies. It consists in a UV Multi Object slit Spectrograph (MOS) with a resolution of R ∼ 2000, and a FWHM of ∼ 6 arcsec over an effective field of view of 37×20 arcmin 2 .…”

mentioning

confidence: 99%

Emission from the circumgalactic medium: from cosmological zoom-in simulations to multiwavelength observables

Augustin

Quiret

Milliard

et al. 2019

Monthly Notices of the Royal Astronomical Society

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We simulate the flux emitted from galaxy halos in order to quantify the brightness of the circumgalactic medium (CGM). We use dedicated zoom-in cosmological simulations with the hydrodynamical Adaptive Mesh Refinement code RAMSES, which are evolved down to z=0 and reach a maximum spatial resolution of 380 h −1 pc and a gas mass resolution up to 1.8×10 5 h −1 M in the densest regions. We compute the expected emission from the gas in the CGM using CLOUDY emissivity models for different lines (e.g. Lyα, CIV, OVI, CVI, OVIII) considering UV background fluorescence, gravitational cooling and continuum emission. In the case of Lyα we additionally consider the scattering of continuum photons. We compare our predictions to current observations and find them to be in good agreement at any redshift after adjusting the Lyα escape fraction. We combine our mock observations with instrument models for FIREBall-2 (UV balloon spectrograph) and HARMONI (visible and NIR IFU on the ELT) to predict CGM observations with either instrument and optimise target selections and observing strategies. Our results show that Lyα emission from the CGM at a redshift of 0.7 will be observable with FIREBall-2 for bright galaxies (NUV∼18 mag), while metal lines like OVI and CIV will remain challenging to detect. HARMONI is found to be well suited to study the CGM at different redshifts with various tracers.

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confidence: 99%

Emission from the circumgalactic medium: from cosmological zoom-in simulations to multiwavelength observables

Augustin

Quiret

Milliard

et al. 2019

Monthly Notices of the Royal Astronomical Society

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“…Significant progress has been made since flight on our understanding of the stray light issues faced by FB-2, as well as astronomical detection limits made by the instrument, both of which are discussed in great detail by Picouet. 29 We present some of these results and explain the ongoing work below.…”

Section: Flight Datamentioning

confidence: 86%

“…29 An initial background subtraction, using a polynomial fit in the y direction (along each column), has been sufficient to reveal some of the brighter calibration targets in the FB-2 science field observed. Picouet 29 has demonstrated a more complete subtraction using the Source Extractor Wrapper for Python (sewpy; Fig. 8 describes a preliminary data reduction showing a high background but some continuum sources are visible; improvement to this reduction is on-going).…”

Section: Flight Datamentioning

confidence: 99%

Delta-doped electron-multiplying CCDs for FIREBall-2

Kyne

Hamden

Nikzad

et al. 2020

J. Astron. Telesc. Instrum. Syst.

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We present the status of ongoing detector development efforts for our joint NASA/ Centre National d'Études Spatiales balloon-borne UV multiobject spectrograph, the Faint Intergalactic Redshifted Emission Balloon (FIREBall-2; FB-2). FB-2 demonstrates a UV detector technology, the delta-doped electron-multiplying CCD (EMCCD), in a low-risk suborbital environment, to prove the performance of EMCCDs for future space missions and technology readiness level advancement. EMCCDs can be used in photon-counting mode to achieve extremely low readout noise (<1 electron). Our testing has focused on reducing clockinduced-charge (CIC) through wave shaping and well-depth optimization with a Nüvü V2 CCCP controller, measuring CIC at 0.001 e − ∕pixel∕frame. This optimization also includes methods for reducing dark current, via cooling, and substrate voltage levels. We discuss the challenges of removing cosmic rays, which are also amplified by these detectors, as well as a data reduction pipeline designed for our noise measurement objectives. FB-2 flew in 2018, providing the first time an EMCCD, was used for UV observations in the stratosphere. FB-2 is currently being built up to fly again in 2020, and improvements are being made to the EMCCD to continue optimizing its performance for better noise control.

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The Faint Intergalactic Redshifted Emission Balloon-2: End-to-end ground Calibration (Conference Presentation)

Cited by 2 publications

References 0 publications

Emission from the circumgalactic medium: from cosmological zoom-in simulations to multiwavelength observables

Emission from the circumgalactic medium: from cosmological zoom-in simulations to multiwavelength observables

Delta-doped electron-multiplying CCDs for FIREBall-2

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