| タイトル | The orbital period of 4U/MXB 1636-53 (V801 Arae) |
| 著者（英） | Van Der Klis, M.; Smale, A. P.; Van Amerongen, S.; Pedersen, H.; Van Paradijs, J. |
| 著者所属（英） | Nationaal Inst. voor Kernfysica en Hoge Energiefysica|Amsterdam Univ.|NASA Goddard Space Flight Center |
| 発行日 | 1990-08-01 |
| 言語 | eng |
| 内容記述 | The results of CCD photometry of the optical counterpart (V801 Arae) of the X-ray burst source 4U/MXB 1636-53, obtained between 1984 and 1988 are reported. From these data, and additional measurements discussed previously, a linear orbital ephemeris P(orb) = 3.803878 + or - 0.000022 h covering the interval between 1980 and 1988 is derived. The results confirm that substantial night-to-night variations occur in the shape of the light curve, superposed on the periodic brightness variations. No evidence is found for a relation between orbital phase and the delays of optical bursts relative to the coincident X-ray bursts. The variation with orbital phase of the corresponding ratios of optical to X-ray burst fluences and peak fluxes does not follow the average optical light curve. These results suggest that substantial long-term changes occur in the spatial distribution of reprocessing matter in the binary system. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 91A10705 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/352436 |
|
