FIREBALL: the Faint Intergalactic medium Redshifted Emission Balloon: overview and first science flight results

Milliard, B.; Martin, D. Christopher; Schiminovich, David; Evrard, Jean; Matuszewski, Matt; Rahman, Shahinur; Tuttle, Sarah; McLean, Ryan; Deharveng, J. M.; Mirc, F.; Grange, Robert; Chave, R.

doi:10.1117/12.857850

Cited by 19 publications

(11 citation statements)

References 8 publications

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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 .…”

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confidence: 99%

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

Augustin

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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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“…FIREBall-2 is a follow on to FIREBall-1, which was launched on two separate occasions in 2007 and 2009. [1][2][3][4] FIREBall-1 was a technical and engineering success, but elucidated the need for lower detection limits and FIREBall-2, resulting in changes to the spectrograph design and the detector. The focus of this manuscript is on the FIREBall-2 detector, specifically development of Electron Multiplying CCDs (EMCCDs) with unprecedented quantum efficiency (QE) within the FIREBall-2 observation band.…”

Section: Fireball-2mentioning

confidence: 99%

Detector performance for the FIREBall-2 UV experiment

et al. 2015

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We present an overview of the detector for the upcoming Faint Intergalactic Red-shifted Emission Balloon (FIREBall-2) experiment, with a particular focus on the development of device-integrated optical coatings and detector quantum efficiency (QE). FIREBall-2 is designed to measure emission from the strong resonance lines of HI, OVI, and CIV, all red-shifted to 195-225 nm window; its detector is a delta-doped electron multiplying chargecoupled device (EM-CCD). Delta-doped arrays, invented at JPL, achieve 100% internal QE from the UV through the visible. External losses due to reflection (~70% in some UV regions) can be mitigated with antireflection coatings (ARCs). Using atomic layer deposition (ALD), thin-film optical filters are incorporated with existing detector technologies. ALD offers nanometer-scale control over film thickness and interface quality, allowing for precision growth of multilayer films. Several AR coatings, including single and multi-layer designs, were tested for FIREBall-2. QE measurements match modeled transmittance behavior remarkably well, showing improved performance in the target wavelength range. Also under development are ALD coatings to enhance QE for a variety of spectral regions throughout the UV (90-320 nm) and visible (320-1000 nm) range both for space-based imaging and spectroscopy as well as for ground-based telescopes.Keywords: Ultraviolet, EMCCD, AR coating, delta doping, FIREBall, atomic layer deposition FIREBALL-2The Faint Intergalactic Red Shifted Emission Balloon (FIREBall-2) is a balloon-borne UV spectrograph funded jointly by NASA and CNES. Briefly, FIREBall-2 is designed to observe emission from the circumgalactic medium (CGM), the diffuse gas around galaxies. The primary targets include line emission from HI (Lyman-α, 121.6 nm) at a redshift of z=0.7; OVI (103.3 nm) at z=1.0; and CIV (154.9 nm) at z=0.3. The instrument is optimized for narrowband observations spanning the stratospheric window (200-210 nm) centered at 205 nm. FIREBall-2 is a follow on to FIREBall-1, which was launched on two separate occasions in 2007 and 2009. [1][2][3][4] FIREBall-1 was a technical and engineering success, but elucidated the need for lower detection limits and FIREBall-2, resulting in changes to the spectrograph design and the detector. The focus of this manuscript is on the FIREBall-2 detector, specifically development of Electron Multiplying CCDs (EMCCDs) with unprecedented quantum efficiency (QE) within the FIREBall-2 observation band. Details of the spectrograph design and detector noise performance are provided elsewhere, including within these Proceedings. FIREBALL-2 DETECTORThe FIREBall-2 detector development is a collaborative effort shared between the Jet Propulsion Laboratory (JPL), the California Institute of Technology, and Columbia University. The detector is based on e2v's CCD201-20, an electron multiplying charge-coupled device (EMCCD). EMCCDs are conventional CCDs in which one of the register phases is replaced with a high voltage (40-50 V) gain register that multip...

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“…8,9 FIREBall-1 was a fiber-fed spectrograph which used an Offner design and a GALEXspare near-UV microchannel plate (MCP).…”

Section: Changes From Fireball-1mentioning

confidence: 99%

High efficiency CCD detectors at UV wavelengths

et al. 2014

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The Faint Intergalactic Redshifted Emission Balloon (FIREBall) is a NASA/CNES balloon-borne ultraviolet multi-object spectrograph designed to observe the diffuse gas around galaxies (the circumgalactic medium) via line emission redshifted to ∼205 nm. FIREBall uses a ultraviolet-optimized delta doped e2v CCD201 with a custom designed high efficiency five layer anti-reflection coating. This combination achieves very high quantum efficiency (QE) and photon-counting capability, a first for a CCD detector in this wavelength range. We also present new work on red blocking mirror coatings to reduce red leak.

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FIREBALL: the Faint Intergalactic medium Redshifted Emission Balloon: overview and first science flight results

Cited by 19 publications

References 8 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

Detector performance for the FIREBall-2 UV experiment

High efficiency CCD detectors at UV wavelengths

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