Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...203l...9d&link_type=abstract
Astrophysical Journal, vol. 203, Jan. 1, 1976, pt. 2, p. L9-L12.
Astronomy and Astrophysics
Astronomy
47
Novae, X Ray Stars, Astronomical Models, Bremsstrahlung, Light Curve, Luminous Intensity, Satellite Observation, Spaceborne Astronomy, Stellar Spectra, X Ray Spectra
Scientific paper
The X-ray nova A0620-00 (Nova Monocerotis 1975) has been observed with the SAS-3 satellite. The 1-10 keV intensity was observed to increase by a factor of 2.3 from August 8 to August 11, 1975. It reached and maintained a constant intensity of 1.7 by 10 to the -6 power erg/sq cm/sec from August 11 to August 13. Limits on periodicities of not more than 2 per cent of the power were obtained for periods from 0.2 ms to 435 s. A precise position was obtained with the SAS-3 modulation collimators on August 15. This led directly to optical and radio identifications. Observations with the SAS-3 low-energy concentrator system on August 27 showed an intense 0.4-0.8 keV flux emanating from the nova. A hydrogen column density of 3.5 (plus or minus 0.3) by 10 to the 21st power per sq cm was inferred from these data.
Bradt Hale
Buff James
Clark George W.
Delvaille J.
Doxsey Rodger
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