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Gómez, José F.; Trapero, J.; Morales, Carmen; Orozco, Verónica; Edelstein, Jerry; Korpela, Eric; Lampton, M.

doi:10.1023/a:1011638130349

Cited by 3 publications

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“…Intensity-corrected spectra were co-added for each stellar object and converted to fluxes, applying the in-flight calibration performed using simultaneous observations of the full Moon with EUVE and EURD. Further details of the data reduction process can be found in Gómez et al (2000).…”

Section: Observations Data Reduction and Merged Iue Spectramentioning

confidence: 99%

Far‐Ultraviolet Spectra of B Stars near the Ecliptic

Morales¹,

Orozco²,

Gómez³

et al. 2001

ApJ

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Spectra of B stars in the wavelength range of 911-1100Å have been obtained with the EURD spectrograph onboard the Spanish satellite MINISAT-01 with ∼ 5Å spectral resolution. IUE spectra of the same stars have been used to normalize Kurucz models to the distance, reddening and spectral type of the corresponding star. The comparison of 8 main-sequence stars studied in detail (α Vir, ǫ Tau, λ Tau, τ Tau, α Leo, ζ Lib, θ Oph, and σ Sgr) shows agreement with Kurucz models, but observed fluxes are 10-40% higher than the models in most cases. The difference in flux between observations and models is higher in the wavelength range between Lyman α and Lyman β. We suggest that Kurucz models underestimate the FUV flux of main-sequence B stars between these 1 Based on the development and utilization of the Espectrógrafo Ultravioleta de Radiación Difusa, a collaboration

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Section: Observations Data Reduction and Merged Iue Spectramentioning

confidence: 99%

Far‐Ultraviolet Spectra of B Stars near the Ecliptic

Morales¹,

Orozco²,

Gómez³

et al. 2001

ApJ

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Extreme and Far Ultraviolet Observations from EURD after Three Years of Mission

Morales

Gómez

Trapero

et al. 2001

Highlights of Spanish Astrophysics II

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Data‐model comparison search analysis of coincident PBO Balmer α, EURD Lyman β geocoronal measurements from March 2000

et al. 2004

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[1] Recent Lyman series and Balmer series airglow measurements provide a fresh opportunity to investigate the density distribution and variability of atomic hydrogen in the upper atmosphere. Dedicated nightside Balmer a Fabry-Perot spectrometer measurements at the Pine Bluff Observatory (PBO), University of Wisconsin-Madison, have been acquired since late 1999 taking advantage of several technological advances. Extreme ultraviolet spectral radiance measurements by the Espectrógrafo Ultravioleta extremo para la Radiación Difusa (EURD) instrument on the Spanish MINISAT-1 satellite from October 1997 to December 2001 provide extensive sets of geocoronal Lyman b, Lyman g and He 584 Å emission intensities. In this paper, coincident EURD Lyman b and PBO Balmer a radiance measurements from the early March 2000 new moon period are presented. In addition to serving as examples of the data sets now available, the data volume poses an analysis challenge not faced in prior geocoronal studies. A datamodel comparison search procedure employing resonance radiation transport results for extensive sets of parametric density distribution models is being developed for use in analyses of multiple large data sets; this is described, and example results for the PBO and EURD March 2000 data sets are presented. The tightness of the constraints obtained for the solar line-center Lyman b irradiance and the atomic hydrogen column abundance is somewhat surprising, given the crudeness of the parameter binning in the search procedure and the fact that a small number of recognized corrections remain to be made to each data set.

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Cited by 3 publications

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Far‐Ultraviolet Spectra of B Stars near the Ecliptic

Far‐Ultraviolet Spectra of B Stars near the Ecliptic

Extreme and Far Ultraviolet Observations from EURD after Three Years of Mission

Data‐model comparison search analysis of coincident PBO Balmer α, EURD Lyman β geocoronal measurements from March 2000

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