Fig. 5.
Download original image
Long-term evolution of the luminosity in the energy range 0.2–12 keV (upper panel) and of the pulse period (lower panel) of 4U 0728-25. Telescope and epoch: (1) Uhuru catalogue: 12/12/1970–18/03/1973 (Forman et al. 1978); (2) Ariel V: 01/11/1974–30/04/1977 (Steiner et al. 1984); (3) Ariel V 3A catalogue: 15/10/1974–14/03/1980 (Warwick et al. 1981); (4) HEAO1: 19–23/10/1977 (Steiner et al. 1984); (5) HEAO1: 15/08/1977–15/02/1978 (Wood et al. 1984); (6) RXTE: 05/05/1997 (Corbet & Peele 1997); (7) AstroSat: 06–07/05/2016 (Roy et al. 2020); (8) XMM–Newton: 11/04/2023 (this work).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.