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X-ray variability of Scorpius X-1 during a multiwavelength campaign

1992; IOP Publishing; Volume: 396; Linguagem: Inglês

10.1086/171710

1538-4357

P. Hertz, Brian Vaughan, K. S. Wood, J. P. Norris, Kazuhisa Mitsuda, P. F. Michelson, Tadayasu Dotani,

Geophysics and Sensor Technology

view Abstract Citations (42) References (44) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS X-Ray Variability of Scorpius X-1 during a Multiwavelength Campaign Hertz, P. ; Vaughan, B. ; Wood, K. S. ; Norris, J. P. ; Mitsuda, K. ; Michelson, P. F. ; Dotani, T. Abstract Consideration is given to the X-ray variability of Scorpius X-1, which was observed with Ginga on March 9-11, 1989 as part of a multiwavelength campaign. The temporal characteristics observed, including quasi-periodic oscillations, HF noise, and VLF noise, are consistent with previous observations of Sco X-1. Quasi-periodic oscillations are observed on both the normal branch and the lower flaring branch, but not on the upper flaring branch. Limits are placed on the fractional rms variation of quasi-period oscillations on the upper flaring branch of less than or approximately equal to 2 percent of the total intensity. The characteristics of the observed red noise components are found to vary along the flaring branch. The fractional rms variation of VLF noise increases from less than 2 to greater than 6 percent as Sco X-1 moves from the flaring branch-normal branch vertex to the upper end of the flaring branch. Publication: The Astrophysical Journal Pub Date: September 1992 DOI: 10.1086/171710 Bibcode: 1992ApJ...396..201H Keywords: Color-Color Diagram; Scorpius Constellation; Stellar Mass Accretion; Variable Stars; X Ray Binaries; Companion Stars; Ginga Satellite; Neutron Stars; X Ray Sources; Astrophysics; STARS: BINARIES: CLOSE; STARS: INDIVIDUAL CONSTELLATION NAME: SCORPIUS X-1; STARS: VARIABLES: OTHER MISCELLANEOUS; X-RAYS: STARS full text sources ADS | data products SIMBAD (6)