748 datasets found

Keywords: ultraviolet astronomy

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  • Spectra of a Holmium in the near-UV. II.

    Fourier Transform spectra of Holmium (Ho) in the UV spectral range from 31530 to 25000cm^-1^ (317 to 400nm) have been investigated, particularly focusing on the ionic lines. The...
  • Spectra of a Holmium in the near-UV. I. Ho I.

    The Fourier Transform spectra of a Holmium hollow cathode discharge lamp have been investigated in the UV spectral range from 25000 up to 31530cm^-1^ (317 to 400nm). Two Ho...
  • Spectrum analysis of CrII

    We have made new observations of the spectrum of singly ionized chromium (CrII) in the region 2850-37900{AA} with the National Institute of Standards and Technology 2m Fourier...
  • High resolution EUV spectrum of N_2_

    We have analyzed high-resolution (FWHM=0.2{AA}) extreme-ultraviolet (EUV, 800-1350{AA}) laboratory emission spectra of molecular nitrogen excited by an electron impact at 20 and...
  • An atlas of FUV spectra of 31 Cyg

    The {zeta} Aurigae system 31 Cygni (K4 Ib + B4 V) was observed by the FUSE satellite during total eclipse and at three phases during chromospheric eclipse. We present the...
  • Far-UV spectral atlas of O-type stars

    In this paper, we present a spectral atlas covering the wavelength interval 930-1188{AA} for O2-O9.5 stars using Far-Ultraviolet Spectroscopic Explorer archival data. The stars...
  • UV spectrum of CrII

    We report new observations of the spectrum of singly ionized chromium (CrII) in the region 1142-3954{AA}. The spectra were recorded with the National Institute of Standards and...
  • 2<zobs<4 quasars stacked spectrum

    We investigate the metal species associated with the Ly{alpha} forest in eBOSS quasar spectra. Metal absorption lines are revealed in stacked spectra from cross-correlating the...
  • UV and optical spectra of type IIP SN2021yja

    We present three epochs of early-time ultraviolet (UV) and optical HST/STIS spectroscopy of the young, nearby Type IIP supernova (SN) 2021yja. We complement the HST data with...
  • F125W and UV mag of 6.0<z<8.2 galaxies candidates

    Reionization is an inhomogeneous process, thought to begin in small ionized bubbles of the intergalactic medium (IGM) around overdense regions of galaxies. Recent Ly{alpha}...
  • The ELVES survey photometric results

    We present the final sample of the Exploration of Local VolumE Satellites (ELVES) survey, a survey of the dwarf satellites of a nearly volume-limited sample of Milky Way...
  • Photometry and spectroscopy of ASASSN-17jz

    We present observations of the extremely luminous but ambiguous nuclear transient (ANT) ASASSN-17jz, spanning roughly 1200 days of the object's evolution. ASASSN-17jz was...
  • TDSS. Changing-look quasars candidates

    Active galactic nuclei (AGN) can vary significantly in their rest-frame optical/UV continuum emission, and with strong associated changes in broad line emission, on much shorter...
  • A multiwavelength study of GRS 1716-249 in outburst

    We present a detailed study of the evolution of the Galactic black hole transient GRS 1716-249 during its 2016-2017 outburst at optical (Las Cumbres Observatory), mid-infrared...
  • CANDELS & KINGFISH disk-dominated galaxies

    We examine and quantify how hybrid (e.g., UV+IR) star formation rate (SFR) estimators and the A_FUV_-{beta} relation depend on inclination for disk-dominated galaxies using...
  • UV-to-NIR spectra of 8 Wolf-Rayet stars in LMC

    Are WO-type Wolf-Rayet (WR) stars in the final stage of massive star evolution before core-collapse? Although WC- and WO-type WRs have very similar spectra, WOs show a much...
  • High-quality UV & X-ray quasar spectral data

    We examine the UV/X-ray properties of 1378 quasars in order to link empirical correlations to theoretical models of the physical mechanisms dominating quasars as a function of...
  • ATLAS17jrp light curves and DBSP spectra

    We hereby report the discovery of ATLAS17jrp as an extraordinary tidal disruption event (TDE) in the star-forming galaxy SDSS_J162034.99+240726.5 in our recent sample of...
  • FUSE survey of H_2_ in the Galactic disk

    We report results from a Far Ultraviolet Spectrographic Explorer (FUSE) survey of interstellar molecular hydrogen (H_2_) in the Galactic disk toward 139 O-type and early B-type...
  • METAL Hubble prog. II. LMC dust-to-gas ratio

    A key component of the baryon cycle in galaxies is the depletion of metals from the gas to the dust phase in the neutral interstellar medium (ISM). The METAL (Metal Evolution,...
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