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The 144 second periodic flux variations during x ray turn-on of hercules x-1
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Leahy, D. A. Matsuoka, M. Kawai, N. Yoshida, A. |
| Copyright Year | 1992 |
| Description | Hercules X-1 is a well known bright binary X ray pulsator. It has a 1.70 day orbital period, a pulsation period of 1.24 second, and a 35 day semiperiodic variability. The discovery is reported of a new 144 second periodicity in the X ray emission from Her X-1. The periodicity is seen in X ray observations of Her X-1 by the LAC instrument onboard the Ginga satellite during Aug. to Sep. 1988. The periodic flux variations occur during the time of X ray turnon at the beginning of a high state of Her X-1, in the same time that a pre-eclipse dip also occurs. An analysis of the LAC spectra of Her X-1 during this period is also presented. Large changes in spectral shape occur associated with the dip. |
| File Size | 422880 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920012654 |
| Archival Resource Key | ark:/13960/t55f3qx04 |
| Language | English |
| Publisher Date | 1992-02-01 |
| Access Restriction | Open |
| Subject Keyword | Space Radiation Stellar Spectra Eclipsing Binary Stars Pulse Duration Astronomical Observatories Daytime Emission Spectra Spectrum Analysis Pulsars Light Curve X Ray Astronomy Periodic Variations X Ray Stars Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
