A High Spectral Resolution Observation of the Soft X‐Ray Diffuse Background with Thermal Detectors | Zendy

D. McCammon | Zendy; R. Almy | Zendy; E. Apodaca | Zendy; Wouter Bergmann Tiest | Zendy; Wei Cui | Zendy; S. Deiker | Zendy; M. Galeazzi | Zendy; M. Juda | Zendy; A. Lesser | Zendy; T. Mihara | Zendy; J. P. Morgenthaler | Zendy; W. T. Sanders | Zendy; J. Zhang | Zendy; E. FigueroaFeliciano | Zendy; Richard L. Kelley | Zendy; S. H. Moseley | Zendy; R. F. Mushotzky | Zendy; F. S. Porter | Zendy; C. K. Stahle | Zendy; Andrew E. Szymkowiak | Zendy

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A High Spectral Resolution Observation of the Soft X‐Ray Diffuse Background with Thermal Detectors

Author(s) -

D. McCammon,

R. Almy,

E. Apodaca,

Wouter Bergmann Tiest,

Wei Cui,

S. Deiker,

M. Galeazzi,

M. Juda,

A. Lesser,

T. Mihara,

J. P. Morgenthaler,

W. T. Sanders,

J. Zhang,

E. FigueroaFeliciano,

Richard L. Kelley,

S. H. Moseley,

R. F. Mushotzky,

F. S. Porter,

C. K. Stahle,

Andrew E. Szymkowiak

Publication year - 2002

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/341727

Subject(s) - physics , sounding rocket , rosat , resolution (logic) , astrophysics , full width at half maximum , spectral line , spectral resolution , detector , optics , x ray background , background radiation , line (geometry) , photon , x ray , astronomy , radiation , galaxy , artificial intelligence , computer science , geometry , active galactic nucleus , mathematics

A high spectral resolution observation of the diffuse X-ray background in the60 - 1000 eV energy range has been made using an array of thirty-six 1 mm^2micro-calorimeters flown on a sounding rocket. Detector energy resolutionranged from 5-12 eV FWHM, and a composite spectrum of ~ 1 steradian of thebackground centered at l = 90, b = +60 was obtained with a net resolution of ~9 eV. The target area includes bright 1/4 keV regions, but avoids Loop I andthe North Polar Spur. Lines of C VI, O VII, and O VIII are clearly detectedwith intensities of 5.4 +/- 2.3, 4.8 +/- 0.8, and 1.6 +/- 0.4 photons cm^-2s^-1 sr^-1, respectively. The oxygen lines alone account for a majority of thediffuse background observed in the ROSAT R4 band that is not due to resolvedextragalactic discrete sources. We also have a positive detection of the Fe-Mline complex near 70 eV at an intensity consistent with previous upper limitsthat indicate substantial gas phase depletion of iron. We include a detaileddescription of the instrument and its detectors.Comment: To appear in The Astrophysical Journa

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