11 citations · 22 across the 2 of their papers we have counts for
7 papers · 1 filter
Lyman-Alpha Absorption in the Quasar Triplet Q0107-025A, Q0107-025B, and Q0107-0232: Data Calibration and Line Selection
C. E. Petry, C. D. Impey, J. L. Fenton +1
We present spectroscopic observations for quasars Q0107-025A, Q0107-025B, and Q0107-0232. For the first time, all data obtained with the Hubble Space Telescope's GHRS and FOS for t…
HS 0837+4717 -- a metal-deficient blue compact galaxy with large nitrogen excess
Simon Pustilnik, Alexei Kniazev, Alexander Pramskij +5
(Abridged) We present the results of high S/N long-slit spectroscopy with the Multiple Mirror and the SAO 6-m telescopes, optical imaging with the Wise 1-m telescope and HI observa…
Serendipity and the SDSS: Discovery of the Largest Known Planetary Nebula on the Sky
Paul C Hewett, Michael J Irwin, Evan D Skillman +4
Investigation of spectra from the Sloan Digital Sky Survey reveals the presence of a region of ionized gas of >2 degrees diameter centered approximately at alpha = 10^h 37^m delta…
Optical Spectropolarimetry of Quasi-Stellar Objects Discovered by the Two-Micron All Sky Survey
Paul S. Smith, Gary D. Schmidt, Dean C. Hines +1
Highly polarized QSOs discovered in the Two-Micron All Sky Survey (2MASS) have been observed to determine the source(s) of optical polarization in this near-infrared color-selected…
The N/O abundance ratio in the lowest-metallicity blue compact dwarf galaxies
Y. Izotov, F. Chaffee, C. Foltz +6
The results of the N/O abundance determination in a sample of low-metallicity blue compact dwarf (BCD) galaxies based on new spectroscopic observations with large telescopes (Keck,…
The Chandra Multi-wavelength Project (ChaMP): a serendipitous survey with Chandra archival data
B. J. Wilkes, P. Green, R. Brissenden +34
The launch of the Chandra X-ray Observatory in July 1999 opened a new era in X-ray astronomy. Its unprecedented, <0.5" spatial resolution and low background are providing views of…