X-ray Nova A0620--00: Celestial position and low-energy flux

Journal Article · Thu Jan 01 04:00:00 EST 1976 · Astrophys. J., Lett., v. 203, no. 1, pp. L9-L12

DOI:https://doi.org/10.1086/182006· OSTI ID:4008208

Doxsey, R; Jernigan, G; Hearn, D; Bradt, H; Buff, J; Clark, G W; Delvaille, J; Epstein, A; Joss, P C; Matilsky, T; Mayer, W; McClintock, J; Rappaport, S; Richardson, J; Schnopper, H

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. It reached and maintained a constant intensity of 1.7x10$sup -6$ ergs cm$sup -2$ s$sup -1$ from August 11 to August 13. Limits on periodicities of less than or approximately equal to 2 percent 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+-0.3) x10$sup 21$ cm$sup -2$ was inferred from these data. (AIP)

• Research Organization: Department of Physics and Center for Space Research, Massachusetts Institute of Technology
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-027023
• OSTI ID: 4008208
• Journal Information: Astrophys. J., Lett., v. 203, no. 1, pp. L9-L12, Journal Name: Astrophys. J., Lett., v. 203, no. 1, pp. L9-L12; ISSN AJLEA
• Country of Publication: United States
• Language: English

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