Abstract
view Abstract Citations (35) References (14) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS An ultrasoft X-ray source in Coma Berenices. Margon, B. ; Malina, R. ; Bowyer, S. ; Cruddace, R. ; Lampton, M. Abstract An intense soft X-ray source with an extraordinary spectrum has been observed in Coma Berenices, 4 deg northeast of and not associated with the Coma cluster of galaxies. Two spectra, obtained at different times in a sounding-rocket flight, indicate that the source temperature in thermal models is less than 1 million K; a power-law model requires photon power-law indices steeper than n = -3. The intensity in the 44-165 A band is of the order of 5 by 10 to the -10th power erg/sq cm/sec, but no flux is present at energies 0.3-2.1 keV to a limit of 1 by 10 to the -10th power erg/sq cm/sec. The lack of bright stars or a supernova remnant in the error box implies that this may be a new class of soft X-ray sources. Publication: The Astrophysical Journal Pub Date: January 1976 DOI: 10.1086/182011 Bibcode: 1976ApJ...203L..25M Keywords: Hot Stars; White Dwarf Stars; X Ray Spectra; Astronomical Models; Galactic Clusters; Proportional Counters; X Ray Sources; Astronomy full text sources ADS | data products SIMBAD (2)
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