Soft x-ray spectroscopy of the Cygnus loop supernova remnant

Phil Oakley, Randall McEntaffer, Webster Cash

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We present the results of a suborbital rocket flight whose scientific target was the Cygnus Loop Supernova Remnant. The payload consists of wire grid collimators, off-plane grating arrays, and gaseous electron multiplier (GEM) detectors. The system is designed for spectral measurements in the 17-107 Å bandpass with a resolution up to ∼60 (λ/Δλ). The Extended X-ray Off-plane Spectrometer (EXOS) was launched on a Terrier-Black Brant rocket on 2009 November 13 from White Sands Missile Range and obtained 340 s of useable scientific data. The X-ray emission is dominated by O VII and O VIII, including the He-like O VII triplet at ∼22 Å. Another emission feature at ∼45 Å is composed primarily of Si XI and Si XII. The best-fit model to this spectrum is an equilibrium plasma model at a temperature of log(T) = 6.4 (0.23 keV).

Original languageEnglish (US)
Article number51
JournalAstrophysical Journal
Issue number1
StatePublished - Mar 20 2013

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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